What William Buck does

William Buck is a privately held mid-tier chartered accounting and business advisory firm founded in 1895 and headquartered in Sydney, Australia. The firm employs over 1,200 professionals, including 150+ partners, across 10 offices spanning all major Australian state capitals (Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Parramatta, Gold Coast) and two New Zealand locations (Auckland, Tauranga). William Buck operates as an association of independently owned firms trading under a unified brand, serving private and family businesses, large enterprises, high-net-worth individuals, not-for-profits, international clients, and a cohort of 2,000+ innovative start-ups and scale-ups.

The firm delivers a comprehensive portfolio of professional services across seven core lines — Audit & Assurance, Business Advisory, Corporate Finance, Restructuring & Insolvency, Tax Services, Wealth Advisory, and International Business Services — spanning 13 industry sectors. Specialized modules include Virtual CFO Services, R&D Tax Incentive advisory, Cloud Accounting, and Sustainability and Carbon Reporting aligned to Australian Sustainability Reporting Standards. Underlying technology is built on commodity cloud-based accounting platforms and digital advisory tooling rather than proprietary IP; international capability is delivered via the Praxity global alliance, providing access to 480 offices in 70+ countries. The firm does not disclose proprietary AI/ML products or research, and its competitive differentiation rests on partner-led relationships, sector specialization, and internal talent development rather than technology platform ownership.

William Buck's revenue model is professional-services fees on a customised, engagement-specific quote basis with multi-year contract cadence typical of audit and advisory mandates. Distribution is direct via the 10-office regional network, with cross-sell into international work channeled through Praxity. Growth has been material: 29% revenue growth and 14% headcount growth over the past two years, supported by recent geographic expansion (Canberra), appointment to high-profile restructuring mandates (GFG Alliance / Liberty Primary Metals Australia), and continued talent investment exceeding 115,000 training hours annually. The firm remains partner-owned with no disclosed private equity or venture capital backing.

Name

William Buck

Legal name

William Buck

Website

https://williambuck.com

Company type

Private

Founded year

1895

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

William Buck is a privately held mid-tier chartered accounting and business advisory firm founded in 1895, employing over 1,200 professionals across 10 offices in Australia and New Zealand. It serves private businesses, enterprises, high-net-worth individuals, not-for-profits, and start-ups through audit, tax, corporate finance, restructuring, wealth, and international services.

Ownership category

akta.pro rank

Product category

Accounting & Business Advisory Services

akta.pro primary industry

Accounting & Bookkeeping Services (BPAHABAC)

Keywords

• Accounting services
• Business advisory
• Audit assurance
• Tax services
• Wealth advisory

Headquarters

HQ city

Sydney

HQ country

Australia

HQ region

Oceania

Offices10 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Professional Services Fees: Revenue generated from providing accounting, audit, tax, business advisory, corporate finance, restructuring, wealth advisory, and other professional services to clients on a fee basis.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

William Buck is a mid-tier network of chartered accountants and business advisors delivering audit and assurance, tax, business advisory, corporate finance, restructuring and insolvency, wealth advisory and international business services to enterprises, family businesses, not-for-profits and high-net-worth individuals across Australia and New Zealand.

Product overview

William Buck is a mid-tier accounting and business advisory firm offering a comprehensive portfolio of professional services across Australia and New Zealand. The firm operates as a single integrated service offering rather than a platform-plus-modules architecture. Core service lines include Audit & Assurance, Business Advisory, Corporate Finance, Restructuring & Insolvency, Tax Services, Wealth Advisory, and International Business Services. Within these service lines, the firm offers specialized modules such as Virtual CFO Services, R&D Tax Incentive services, and Cloud Accounting. Additional tools and resources include the William Buck Hour newsletter subscription. The firm serves diverse industries including technology, healthcare, manufacturing, property, and government, and operates across 10 offices in Australia and New Zealand.

Differentiator

Problem solved

Functional benefit

Products and services

• Audit & Assurance Audit and assurance services including external audit, financial reporting accounting and advisory, fraud investigation and prevention, internal audit, IT assurance, risk management and sustainability reporting. Targeted at enterprises, listed groups and growing companies requiring statutory audit and risk assurance.
• Business Advisory Comprehensive business advisory services covering accessing finance and grants, accounting and tax compliance, management reporting and bookkeeping, financial modelling and cashflow forecasting, private client services, restructuring and asset protection, SMSF compliance, strategic planning, succession planning, year-end tax planning, carbon accounting and sustainability reporting.
• Corporate Finance Corporate finance services including financial modelling, funding and IPOs, mergers acquisitions and divestments, strategic business consultancy, transaction services and valuations. Targeted at businesses undertaking transactions, capital raisings or strategic reviews.
• Restructuring & Insolvency Restructuring and insolvency services including bankruptcy and personal insolvency, crisis management, forensic and litigation support, formal insolvency appointments, investigative reviews, lender services, restructuring and turnaround, Safe Harbour reviews and small business restructuring.
• Tax Services Tax services covering ATO audits, executive tax services, indirect tax, international tax, tax consolidation, tax risk management and R&D tax incentive. Targeted at businesses and individuals navigating Australian and New Zealand tax obligations.
• Wealth Advisory Wealth advisory services including estate administration, family office, insurance and risk management, philanthropy, superannuation and wealth creation strategies. Targeted at high-net-worth individuals and families requiring integrated wealth management.
• International Business Services International business services providing cross-border support including Asia Pacific client services, leveraging the Praxity global alliance network of 480+ offices in 70+ countries.
• Virtual CFO Services Virtual CFO services providing remote financial leadership and strategic guidance, offering businesses access to CFO-level expertise without an in-house hire. Targeted at SMEs, start-ups and scale-ups needing senior financial leadership.
• R&D Tax Incentive Research and development tax incentive services helping businesses navigate and maximise R&D tax credits and incentives. Targeted at companies undertaking eligible R&D activities in Australia and New Zealand.
• Cloud Accounting Cloud accounting services providing cloud-based financial management and accounting solutions for business advisory clients.
• William Buck Hour A subscription-based newsletter and update service providing clients with regular commentary on business solutions, growth strategies, industry insights and market trends.

Named customers5 records

Segments6 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

One partnership is on record.

• PraxitycoreStrategic or Co-development PartnerAs a member of Praxity, the world's largest alliance of independent accounting firms, William Buck is supported by an extensive global network with access to 480 offices in over 70 countries, enabling the firm to better enable clients to grow and realize their global potential.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• BDO Australia: BDO is a leading mid-tier global accounting and advisory network with a major Australian practice spanning audit, tax, and advisory for SMEs and enterprises - directly comparable to William Buck in positioning and service mix.
• Grant Thornton Australia: Grant Thornton operates a mid-tier accounting and advisory practice in Australia serving private businesses and listed entities, closely mirroring William Buck's mid-market focus and service breadth.
• RSM Australia: RSM is a global mid-tier accounting network with an Australian practice focused on audit, tax, and business advisory for mid-market clients - a direct competitor to William Buck in segment and offerings.
• Pitcher Partners: Pitcher Partners is an Australian-owned mid-tier accounting and advisory firm with comparable service lines (audit, tax, business advisory, wealth) and similar client focus on family businesses and SMEs.
• Crowe Australasia: Crowe Australasia is a mid-tier accounting and advisory firm offering audit, tax, and consulting services across Australia, competing in the same mid-market segment as William Buck.
• Bentleys: Bentleys is an Australian network of accounting and advisory firms with similar mid-tier positioning, serving private and family businesses with audit, tax, and advisory services.
• HLB Mann Judd: HLB Mann Judd is an Australian mid-tier accounting, tax, and advisory firm with comparable service offerings and a strong focus on privately held and family business clients.
• Baker Tilly Australia: Baker Tilly operates a mid-tier accounting and advisory practice in Australia serving SMEs, family businesses, and not-for-profits - directly comparable to William Buck in scope and target market.

Broad incumbents

• KPMG Australia: KPMG is one of the Big 4 in Australia offering a much broader portfolio (audit, tax, consulting, deal advisory) that overlaps with William Buck across enterprise audit and advisory mandates.
• Deloitte Australia: Deloitte is a Big 4 firm with a full-service Australian practice covering audit, tax, consulting, and financial advisory - competing with William Buck for large enterprise and ASX-listed clients.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about William Buck