Company lists · Data refreshed September 2026
Top 25 Tax preparation outsourcing firms based in the United Kingdom
RevenueBase identified 277 company matches for tax preparation outsourcing firms associated with the United Kingdom as of September 2026 and tracks 2,468 professional contacts across them, including 564 with verified work emails. London is the largest hub.
This list covers company matches for tax preparation outsourcing firms associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest tax preparation outsourcing firms based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 477 contacts → | ||||
Exact match “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 2 | 311 contacts → | ||||
Exact match “GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 3 | 104 contacts → | ||||
Exact match “Online Accounting Service | Bookkeeping | Payroll | Personal Tax Return Filing to HMRC | Corporation Tax Filing | HMRC ONLINE FILING: Our aim is to help small business owners` tax…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 4 | 88 contacts → | ||||
Exact match “Sapphire is an accounting outsourcing company set up for accounting firms in UK and is based in India.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 5 | 54 contacts → | ||||
Exact match “DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 6 | 42 contacts → | ||||
Exact match “At PSB Accountants, we put your goals and aspirations first.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 7 | 36 contacts → | ||||
Exact match “Helping business owners be successful has been our ethos for over 25 years.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 8 | 23 contacts → | ||||
Exact match “Xcelentra specializes in accounting, taxation, payroll, finance, and immigration services across the UK and Europe.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 9 | 22 contacts → | ||||
Exact match “If you run an accountancy or bookkeeping firm, we can help you overcome your staff recruitment and retention challenges with our outsourcing and offshoring solutions that are…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 10 | 21 contacts → | ||||
Exact match “At Amber Solutions, we make it easy for our clients to complete, manage and file corporate and individual tax returns, small to medium and enterprise level documents and much more.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 11 | 17 contacts → | ||||
Exact match “Boobooks offers expert accounting, tax, and business support services tailored for small businesses.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 12 | 17 contacts → | ||||
Exact match “We give you beautiful figures and help you achieve your financial goals.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 13 | 16 contacts → | ||||
Exact match “A thriving business is always seeking to grow.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 14 | 14 contacts → | ||||
Exact match “H M Williams are a firm who pride themselves on an up to date, friendly service.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 15 | 14 contacts → | ||||
Exact match “Modina is a friendly, professional outsourcing service dedicated to helping you stay in control of your bookkeeping and payroll.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 16 | 14 contacts → | ||||
Exact match “Mindspace Outsourcing offers bookkeeping outsourcing and accounting outsourcing services to Businesses and CPA Firms in the UK.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 17 | 13 contacts → | ||||
Exact match “Established in 1993, Wilkins Southworth is a friendly firm of accountants based in Barnes, South West London.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 18 | 12 contacts → | ||||
Exact match “Myself Shabbir Rahman, as the Managing Director, my passion lies in making an extraordinary difference in your life and your business.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 19 | 12 contacts → | ||||
Exact match “Qualified US and UK tax advisors.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 20 | 11 contacts → | ||||
Exact match “AG Tax Limited is a successful and friendly independent firm offering tax compliance and advisory services alongside accounting, bookkeeping and payroll support.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 21 | 11 contacts → | ||||
Exact match “Credentia has been in the Accounting, Bookkeeping & Tax Advisory Out Source Solutions business since 2008.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 22 | 10 contacts → | ||||
Exact match “Technology-driven professional Outsourcing of Accounts and Tax Returns.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 23 | 10 contacts → | ||||
Exact match “At Joshua Leigh & Co.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 24 | 9 contacts → | ||||
Exact match “We provide our tax compliance services in accordance with our ethos – which is Right, On Time, In Budget and with added value.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
| 25 | 9 contacts → | ||||
Exact match “We are based in Surrey and Hampshire.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “tax preparation outsourcing firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 277 tax preparation outsourcing firms based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 564 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Tax preparation outsourcing firms based in the United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 277 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “tax preparation outsourcing firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 564 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Tax preparation outsourcing firms by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tax preparation outsourcing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many tax preparation outsourcing firms are there based in the United Kingdom?
RevenueBase identified 277 company matches for tax preparation outsourcing firms associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Outbooks tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most tax preparation outsourcing firms?
London leads with 84 company records, followed by Manchester (7) and Birmingham (4).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 564 professional contacts with verified work emails tracked across these 277 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 277 tax preparation outsourcing firms based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Tax preparation outsourcing firms by geography
- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada
- Tax preparation outsourcing firms based in Toronto, Canada
- Tax preparation outsourcing firms based in Berlin, Germany
- Tax preparation outsourcing firms based in Hamburg, Germany
- Tax preparation outsourcing firms based in Ahmedabad, India
- Tax preparation outsourcing firms based in Hyderabad, India
- Tax preparation outsourcing firms based in Mumbai, India
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada
Company intelligence · public preview
Top 25 tax preparation outsourcing firms based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 277 matching company records for tax preparation outsourcing firms based in the United Kingdom, with 2,468 tracked contacts and 564 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 tax preparation outsourcing firms based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Outbooksoutbooks.co.ukHQ: Harrow, United KingdomReported employees: 201-500 | Harrow, United Kingdom | 201-500 | Exact match | 477 contacts → |
“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  GI Outsourcinggioutsourcing.comHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 311 contacts → |
“GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Debitamdebitam.comHQ: 42-44 Bishopsgate, United KingdomReported employees: 51-200 | 42-44 Bishopsgate, United Kingdom | 51-200 | Exact match | 104 contacts → |
“Online Accounting Service | Bookkeeping | Payroll | Personal Tax Return Filing to HMRC | Corporation Tax Filing | HMRC ONLINE FILING: Our aim is to help small business owners` tax…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Sapphire Info Solutions P LTDsapphireinfo.net HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 88 contacts → |
“Sapphire is an accounting outsourcing company set up for accounting firms in UK and is based in India.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  DSL Accountingdslaccounting.comHQ: Leamington Spa, United KingdomReported employees: Not recorded | Leamington Spa, United Kingdom | Not recorded | Exact match | 54 contacts → |
“DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  PSB Accountants Limitedp-s-b.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 42 contacts → |
“At PSB Accountants, we put your goals and aspirations first.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Friend & Grant LTDfriendandgrant.co.uk HQ: Rochester, United KingdomReported employees: 11-50 | Rochester, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Helping business owners be successful has been our ethos for over 25 years.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Xcelentra Financial Services LTDxcelentra.comHQ: Milton Keynes, United KingdomReported employees: 51-200 | Milton Keynes, United Kingdom | 51-200 | Exact match | 23 contacts → |
“Xcelentra specializes in accounting, taxation, payroll, finance, and immigration services across the UK and Europe.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Propact Solutionspropactglobal.comHQ: Birmingham, United KingdomReported employees: 11-50 | Birmingham, United Kingdom | 11-50 | Exact match | 22 contacts → |
“If you run an accountancy or bookkeeping firm, we can help you overcome your staff recruitment and retention challenges with our outsourcing and offshoring solutions that are…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Amber Business Solutions London LTDamberbusinesssolutions.netHQ: Ruislip, United KingdomReported employees: 11-50 | Ruislip, United Kingdom | 11-50 | Exact match | 21 contacts → |
“At Amber Solutions, we make it easy for our clients to complete, manage and file corporate and individual tax returns, small to medium and enterprise level documents and much more.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Boobooksboobooks.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Boobooks offers expert accounting, tax, and business support services tailored for small businesses.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | E-Accountants Limitede-accountants.net HQ: Richmond, United KingdomReported employees: 1-10 | Richmond, United Kingdom | 1-10 | Exact match | 17 contacts → |
“We give you beautiful figures and help you achieve your financial goals.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  DAS TAX And Advisory Group US And UKdasaccounting.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“A thriving business is always seeking to grow.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  H M Williams Chartered Certified Accountants And TAX Advisershmwilliams.co.ukHQ: Plympton, United KingdomReported employees: 11-50 | Plympton, United Kingdom | 11-50 | Exact match | 14 contacts → |
“H M Williams are a firm who pride themselves on an up to date, friendly service.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Modinamodina.co.ukHQ: Hitchin, United KingdomReported employees: 1-10 | Hitchin, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Modina is a friendly, professional outsourcing service dedicated to helping you stay in control of your bookkeeping and payroll.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Mindspace Outsourcing Limitedmindspaceoutsourcing.co.ukHQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Mindspace Outsourcing offers bookkeeping outsourcing and accounting outsourcing services to Businesses and CPA Firms in the UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Wilkins Southworthwilkinssouthworth.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Established in 1993, Wilkins Southworth is a friendly firm of accountants based in Barnes, South West London.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  A2z Accounting Solutions Limiteda2zaccounting.co.ukHQ: Aberdeen, United KingdomReported employees: 11-50 | Aberdeen, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Myself Shabbir Rahman, as the Managing Director, my passion lies in making an extraordinary difference in your life and your business.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Neptune TAXneptunetax.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Qualified US and UK tax advisors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  AG TAX LTDagtax.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“AG Tax Limited is a successful and friendly independent firm offering tax compliance and advisory services alongside accounting, bookkeeping and payroll support.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Credentia Business Processescredentia.co.ukHQ: Swindon, United KingdomReported employees: 11-50 | Swindon, United Kingdom | 11-50 | Exact match | 11 contacts → |
“Credentia has been in the Accounting, Bookkeeping & Tax Advisory Out Source Solutions business since 2008.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Advancetrackadvancetrack.comHQ: Coventry, United KingdomReported employees: Not recorded | Coventry, United Kingdom | Not recorded | Exact match | 10 contacts → |
“Technology-driven professional Outsourcing of Accounts and Tax Returns.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Joshua Leigh & COjoshualeighandco.comHQ: Barnet, United KingdomReported employees: 11-50 | Barnet, United Kingdom | 11-50 | Exact match | 10 contacts → |
“At Joshua Leigh & Co.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Montacsmontacs.co.uk HQ: Chester, United KingdomReported employees: 11-50 | Chester, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We provide our tax compliance services in accordance with our ethos – which is Right, On Time, In Budget and with added value.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Elixir Chartered TAX Advisers & Accountantselixir-tax.co.uk HQ: Aldershot, United KingdomReported employees: 11-50 | Aldershot, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We are based in Surrey and Hampshire.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 277 company matches
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Tax preparation outsourcing firms: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
271 records in the displayed employee bands.
6 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 277 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Tax preparation outsourcing firms by metro
Questions about this company list
What does Exact match mean for tax preparation outsourcing firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many tax preparation outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 277 matching company records, 2,468 tracked contacts and 564 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Tax preparation outsourcing firms by geography
- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada
- Tax preparation outsourcing firms based in Toronto, Canada
- Tax preparation outsourcing firms based in Berlin, Germany
- Tax preparation outsourcing firms based in Hamburg, Germany
- Tax preparation outsourcing firms based in Ahmedabad, India
- Tax preparation outsourcing firms based in Hyderabad, India
- Tax preparation outsourcing firms based in Mumbai, India
Cite this list
RevenueBase Data Team. Top 25 tax preparation outsourcing firms based in the United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/tax-preparation-outsourcing-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada
Company intelligence · public preview
Top 25 tax preparation outsourcing firms based in the United Kingdom
RevenueBase records 277 matching company records for tax preparation outsourcing firms based in the United Kingdom, with 2,468 tracked contacts and 564 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 tax preparation outsourcing firms based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Outbooksoutbooks.co.uk HQ: Harrow, United KingdomReported employees: 201-500 | Harrow, United Kingdom | 201-500 | Exact match | 477 contacts → |
“Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | GI Outsourcinggioutsourcing.com HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 311 contacts → |
“GI Outsourcing is a UK-based accountants outsourcing firm.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Debitamdebitam.com HQ: 42-44 Bishopsgate, United KingdomReported employees: 51-200 | 42-44 Bishopsgate, United Kingdom | 51-200 | Exact match | 104 contacts → |
“Online Accounting Service | Bookkeeping | Payroll | Personal Tax Return Filing to HMRC | Corporation Tax Filing | HMRC ONLINE FILING: Our aim is to help small business owners` tax…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Sapphire Info Solutions P LTDsapphireinfo.net HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 88 contacts → |
“Sapphire is an accounting outsourcing company set up for accounting firms in UK and is based in India.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | DSL Accountingdslaccounting.com HQ: Leamington Spa, United KingdomReported employees: Not recorded | Leamington Spa, United Kingdom | Not recorded | Exact match | 54 contacts → |
“DSL is one of the UK's leading small business accountancy firms, helping businesses grow since 1997.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | PSB Accountants Limitedp-s-b.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 42 contacts → |
“At PSB Accountants, we put your goals and aspirations first.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Friend & Grant LTDfriendandgrant.co.uk HQ: Rochester, United KingdomReported employees: 11-50 | Rochester, United Kingdom | 11-50 | Exact match | 36 contacts → |
“Helping business owners be successful has been our ethos for over 25 years.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Xcelentra Financial Services LTDxcelentra.com HQ: Milton Keynes, United KingdomReported employees: 51-200 | Milton Keynes, United Kingdom | 51-200 | Exact match | 23 contacts → |
“Xcelentra specializes in accounting, taxation, payroll, finance, and immigration services across the UK and Europe.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Propact Solutionspropactglobal.com HQ: Birmingham, United KingdomReported employees: 11-50 | Birmingham, United Kingdom | 11-50 | Exact match | 22 contacts → |
“If you run an accountancy or bookkeeping firm, we can help you overcome your staff recruitment and retention challenges with our outsourcing and offshoring solutions that are…” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Amber Business Solutions London LTDamberbusinesssolutions.net HQ: Ruislip, United KingdomReported employees: 11-50 | Ruislip, United Kingdom | 11-50 | Exact match | 21 contacts → |
“At Amber Solutions, we make it easy for our clients to complete, manage and file corporate and individual tax returns, small to medium and enterprise level documents and much more.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Boobooksboobooks.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 17 contacts → |
“Boobooks offers expert accounting, tax, and business support services tailored for small businesses.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | E-Accountants Limitede-accountants.net HQ: Richmond, United KingdomReported employees: 1-10 | Richmond, United Kingdom | 1-10 | Exact match | 17 contacts → |
“We give you beautiful figures and help you achieve your financial goals.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | DAS TAX And Advisory Group US And UKdasaccounting.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 16 contacts → |
“A thriving business is always seeking to grow.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | H M Williams Chartered Certified Accountants And TAX Advisershmwilliams.co.uk HQ: Plympton, United KingdomReported employees: 11-50 | Plympton, United Kingdom | 11-50 | Exact match | 14 contacts → |
“H M Williams are a firm who pride themselves on an up to date, friendly service.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Modinamodina.co.uk HQ: Hitchin, United KingdomReported employees: 1-10 | Hitchin, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Modina is a friendly, professional outsourcing service dedicated to helping you stay in control of your bookkeeping and payroll.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Mindspace Outsourcing Limitedmindspaceoutsourcing.co.uk HQ: London, United KingdomReported employees: 1-10 | London, United Kingdom | 1-10 | Exact match | 14 contacts → |
“Mindspace Outsourcing offers bookkeeping outsourcing and accounting outsourcing services to Businesses and CPA Firms in the UK.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Wilkins Southworthwilkinssouthworth.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 13 contacts → |
“Established in 1993, Wilkins Southworth is a friendly firm of accountants based in Barnes, South West London.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | A2z Accounting Solutions Limiteda2zaccounting.co.uk HQ: Aberdeen, United KingdomReported employees: 11-50 | Aberdeen, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Myself Shabbir Rahman, as the Managing Director, my passion lies in making an extraordinary difference in your life and your business.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Neptune TAXneptunetax.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 12 contacts → |
“Qualified US and UK tax advisors.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | AG TAX LTDagtax.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 11 contacts → |
“AG Tax Limited is a successful and friendly independent firm offering tax compliance and advisory services alongside accounting, bookkeeping and payroll support.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Credentia Business Processescredentia.co.uk HQ: Swindon, United KingdomReported employees: 11-50 | Swindon, United Kingdom | 11-50 | Exact match | 11 contacts → |
“Credentia has been in the Accounting, Bookkeeping & Tax Advisory Out Source Solutions business since 2008.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Advancetrackadvancetrack.com HQ: Coventry, United KingdomReported employees: Not recorded | Coventry, United Kingdom | Not recorded | Exact match | 10 contacts → |
“Technology-driven professional Outsourcing of Accounts and Tax Returns.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Joshua Leigh & COjoshualeighandco.com HQ: Barnet, United KingdomReported employees: 11-50 | Barnet, United Kingdom | 11-50 | Exact match | 10 contacts → |
“At Joshua Leigh & Co.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Montacsmontacs.co.uk HQ: Chester, United KingdomReported employees: 11-50 | Chester, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We provide our tax compliance services in accordance with our ethos – which is Right, On Time, In Budget and with added value.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Elixir Chartered TAX Advisers & Accountantselixir-tax.co.uk HQ: Aldershot, United KingdomReported employees: 11-50 | Aldershot, United Kingdom | 11-50 | Exact match | 9 contacts → |
“We are based in Surrey and Hampshire.” Recorded description excerpt · September 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 277 company matches
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Tax preparation outsourcing firms: dataset insights
September 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
271 records in the displayed employee bands.
6 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 277 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Tax preparation outsourcing firms by metro
Questions about this company list
What does Exact match mean for tax preparation outsourcing firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many tax preparation outsourcing firms did RevenueBase find based in the United Kingdom?
The saved snapshot records 277 matching company records, 2,468 tracked contacts and 564 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Tax preparation outsourcing firms by geography
- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada
- Tax preparation outsourcing firms based in Toronto, Canada
- Tax preparation outsourcing firms based in Berlin, Germany
- Tax preparation outsourcing firms based in Hamburg, Germany
- Tax preparation outsourcing firms based in Ahmedabad, India
- Tax preparation outsourcing firms based in Hyderabad, India
- Tax preparation outsourcing firms based in Mumbai, India
Cite this list
RevenueBase Data Team. Top 25 tax preparation outsourcing firms based in the United Kingdom. Snapshot: September 29, 2026. https://revenuebase.ai/companies/tax-preparation-outsourcing-firms/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Tax preparation outsourcing firms based in Vienna, Austria
- Tax preparation outsourcing firms based in Curitiba, Brazil
- Tax preparation outsourcing firms based in Rio De Janeiro, Brazil
- Tax preparation outsourcing firms based in Sao Paulo, Brazil
- Tax preparation outsourcing firms based in Calgary, Canada
- Tax preparation outsourcing firms based in Mississauga, Canada