Company lists · Data refreshed September 2026

Top 25 Big 5 accounting firms based in Australia

Name: Big 5 accounting firms based in Australia
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 1,277 companies tracked

RevenueBase identified 1,277 big 5 accounting firms headquartered in Australia as of September 2026 and tracks 30,146 professional contacts across them, including 11,451 with verified work emails. Sydney is the largest hub.

This list covers big 5 accounting firms headquartered in Australia, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

1,277Companies

30,146Contacts tracked

11,451Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest big 5 accounting firms based in Australia

Ranked by team size

Top 25 of 1,277 big 5 accounting firms based in Australia, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to big 5 accounting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kpmg Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	5,001-10,000	9,024 contacts →
	Indirect evidence “Welcome to KPMG.” Source: RevenueBase Database · checked Sep 21, 2026
2	Grant Thornton Australia	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	1,626 contacts →
	Indirect evidence “Your business deserves remarkable support.” Source: RevenueBase Database · checked Sep 21, 2026
3	William Buck	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	1,001-5,000	1,088 contacts →
	Indirect evidence “William Buck is a leading firm of Accountants and advisors with 150 partners and over 1,100 professional staff.” Source: RevenueBase Database · checked Sep 21, 2026
4	Moore Australia	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	501-1,000	592 contacts →
	Partial evidence “Moore Australia is a network of five independent accounting, audit and advisory firms with 13 offices and 600+ staff across Australia.” Source: RevenueBase Database · checked Sep 21, 2026
5	SW Accountants & Advisors	Partial evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	201-500	434 contacts →
	Partial evidence “SW Accountants & Advisors is an Australian owned advisory and accounting firm with a 90 year history that understands relationships make all the difference in creating…” Source: RevenueBase Database · checked Sep 21, 2026
6	Forvis Mazars In Australia	Indirect evidence	AustraliaHQ checked Sep 21, 2026	201-500	302 contacts →
	Indirect evidence “Forvis Mazars in Australia forms part of Forvis Mazars Group SC, an independent member of Forvis Mazars Global, a leading professional services network.” Source: RevenueBase Database · checked Sep 21, 2026
7	Vincents	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	201-500	276 contacts →
	Partial evidence “We are an accounting and advisory firm with a team of over 270 experts.” Source: RevenueBase Database · checked Sep 21, 2026
8	Hall Chadwick	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	201-500	266 contacts →
	Partial evidence “Hall Chadwick is one of the largest and most experienced accounting groups in Australia servicing clients in every major capital city and many regional centres in Australia.” Source: RevenueBase Database · checked Sep 21, 2026
9	BG Private	Partial evidence	Hawthorn, AustraliaHQ checked Sep 21, 2026	51-200	239 contacts →
	Partial evidence “BG Private is an AFR Top 100 accounting, audit and advisory firm making us one of Melbourne and Sydney’s leading practices.” Source: RevenueBase Database · checked Sep 21, 2026
10	Kelly Partners Accountants	Indirect evidence	North Sydney, AustraliaHQ checked Sep 21, 2026	201-500	204 contacts →
	Indirect evidence “We exist to make the people, businesses and communities we serve be better off.” Source: RevenueBase Database · checked Sep 21, 2026
11	Prosperity Advisers Group	Indirect evidence	Newcastle, AustraliaHQ checked Sep 21, 2026	51-200	196 contacts →
	Indirect evidence “With over 35 years of successful operation, Prosperity has the technical expertise, industry experience and resources to assist clients meet their financial objectives.” Source: RevenueBase Database · checked Sep 21, 2026
12	Protiviti Australia	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	5,001-10,000	172 contacts →
	Indirect evidence “Protiviti is a global business consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently…” Source: RevenueBase Database · checked Sep 21, 2026
13	Modoras	Indirect evidence	Upper Mount Gravatt, AustraliaHQ checked Sep 21, 2026	201-500	132 contacts →
	Indirect evidence “We cut through complexity and deliver with clarity, precision and pace.” Source: RevenueBase Database · checked Sep 21, 2026
14	Nexia Australia	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	501-1,000	131 contacts →
	Partial evidence “At Nexia Australia, our purpose is to connect you to your true potential by giving you the accounting insight, advice, and support you need to navigate to success.” Source: RevenueBase Database · checked Sep 21, 2026
15	Callida	Indirect evidence	Forrest, AustraliaHQ checked Sep 21, 2026	51-200	124 contacts →
	Indirect evidence “Callida Consulting are a Canberra-based consulting firm, dedicated to our people and the provision of professional services across a range of service offerings.” Source: RevenueBase Database · checked Sep 21, 2026
16	Bell Partners	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	124 contacts →
	Partial evidence “Winner of BRW’s Most Productive Accounting Firm seven years running (2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 and again 2011).” Source: RevenueBase Database · checked Sep 21, 2026
17	The Gild Group	Indirect evidence	Cremorne, AustraliaHQ checked Sep 21, 2026	51-200	109 contacts →
	Indirect evidence “The Gild Group is one of Australia’s fastest growing fully integrated multidisciplinary professional services firms with a comprehensive suite of best-in-class services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Nexia Edwards Marshall	Indirect evidence	Adelaide, AustraliaHQ checked Sep 21, 2026	51-200	107 contacts →
	Indirect evidence “Nexia Edwards Marshall is part of a leading global network with over 519 offices across more than 119 countries.” Source: RevenueBase Database · checked Sep 21, 2026
19	Sinclair Wilson Accountants & Business Advisors	Partial evidence	Warrnambool, AustraliaHQ checked Sep 21, 2026	51-200	102 contacts →
	Partial evidence “Sinclair Wilson was established in 1950 as a two-partner Accounting Firm based in Warrnambool.” Source: RevenueBase Database · checked Sep 21, 2026
20	Xact Accounting	Partial evidence	Indooroopilly, AustraliaHQ checked Sep 21, 2026	11-50	99 contacts →
	Partial evidence “Xact Accounting is a full-service accounting firm dedicated to helping small business and SME owners grow their profit not just revenue.” Source: RevenueBase Database · checked Sep 21, 2026
21	ESV	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	96 contacts →
	Indirect evidence “ESV is a leading mid-tier Australian business advisory and accountancy firm.” Source: RevenueBase Database · checked Sep 21, 2026
22	Wilson Pateras Accountants & Advisors	Indirect evidence	Melbourne, AustraliaHQ checked Sep 21, 2026	51-200	89 contacts →
	Indirect evidence “Wilson Pateras are more than accountants: we are expert advisors and strategists focused on your financial future.” Source: RevenueBase Database · checked Sep 21, 2026
23	Byrons	Indirect evidence	Sydney, AustraliaHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “BYRONS are one of the largest independent advisory firms in Sydney with 18 Directors and over 80 professional staff.” Source: RevenueBase Database · checked Sep 21, 2026
24	Accru Melbourne	Indirect evidence	Hawthorn East, AustraliaHQ checked Sep 21, 2026	51-200	84 contacts →
	Indirect evidence “Accru Melbourne delivers positive financial solutions through exceptional client leadership.” Source: RevenueBase Database · checked Sep 21, 2026
25	Pilot Partners	Partial evidence	Brisbane, AustraliaHQ checked Sep 21, 2026	51-200	83 contacts →
	Partial evidence “Pilot Partners is a Brisbane-based chartered accounting firm made up of a team of expert accountants and specialist business advisors who share a common philosophy - our clients…” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: big 5 accounting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names big 5 accounting firms.
Partial evidence: Its own public description names part of big 5 accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big 5 accounting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,277 big 5 accounting firms based in Australia

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 11,451 reachable decision-makers.

Free signup · no credit card

View the full list →

Big 5 accounting firms based in Australia at a glance

As of Sep 21, 2026

38.0%Verified-email coverage

23.6Average contacts per company

1-10Median size (employees)

10.0%Largest-city concentration · Sydney

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

724

11-50

436

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Australia, so it is reported there. Company counts and contact totals on this page are exact for Australia, over 1,277 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among big 5 accounting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Australia whose own description of what they do matches “big 5 accounting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names big 5 accounting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among big 5 accounting firms, and records with no verified work email. Companies headquartered outside Australia are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 11,451 across the full list. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Big 5 accounting firms by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names big 5 accounting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many big 5 accounting firms are there based in Australia?

RevenueBase identified 1,277 big 5 accounting firms headquartered in Australia as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Kpmg Australia, headquartered in Sydney, tops this list with the largest team on record.

Which city has the most big 5 accounting firms?

Sydney leads with 128 headquartered companies, followed by Melbourne (95) and Brisbane (46).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 11,451 verified decision-maker contacts tracked across these 1,277 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,277 big 5 accounting firms based in Australia. Start with a free account, no credit card.

Download this list →

Related lists

Big 5 accounting firms by geography

Browse the directory

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 Smart Search, 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.