Top 10 Accounting Companies in UK 2025

Accounting companies in the UK are vital as trusted advisors and partners for businesses. They offer different services, including financial management, compliance, strategic planning, business growth, etc. However, with around 35,520 accounting and audit firms in the UK as of 2023, finding the right firm that understands your business needs and provides tailored solutions can take time and effort. To help with this, Invensis, a global finance and accounting service provider, lists the top 10 accounting companies in the UK. This curated selection allows you to access high-quality accounting services easily and make informed decisions to advance your business. But before that, let's get to know more about Invensis.

Invensis Technologies Pvt Ltd

Specifics	Details
Key Services	Accounts payable Services, Procure to Pay (P2P) Services, Order to Cash (O2C) Services, Bookkeeping Services, Accounts Receivable, Finance Analysis & Reporting, Record to Report, Inventory Management Accounting, Payroll Processing, Cash Flow Management
Presence	United States, Canada, Germany, Switzerland, United Kingdom, Japan, Australia, New Zealand, France, Sweden and 40+ Countries Globally
Notable Clients	Amazon, Bank of America, Verizon, Insead, Diakrit, IBM, AirBus, General Electric(GE), Novo Nordisk, and over 1,000+ leading companies worldwide
Contact Details	Address: USA - Invensis Inc. 2785 Rockbrook Dr STE 204 Lewisville, TX 75067. Phone: US - +1 (302)-261-9036, UK - +44 203 411 0183, AUS - +61 3 8820 5183, IND - +91 80 2659 5899. Email: sales@invensis.net

For more information on Invensis and its expertise in finance and accounting services, Contact Us. Our team is ready to assist you with any inquiries you may have.

Invensis is known for providing top-notch and tailored accounting solutions to businesses across the globe since 2000. Some of the services we offer to businesses in the UK include accounts management, bookkeeping, payroll processing, financial analysis, etc. Over the years, the company has been able to handle the client's immediate needs, leveraging its expertise and a workforce of more than 5000 as one of the leading accounting firms in the UK.

Invensis offers highly efficient financial and accounting services designed to optimize returns on client investments while maintaining affordability. Renowned for its swift turnarounds, Invensis has established a solid reputation for delivering flexible and scalable solutions tailored to meet diverse business needs.

Certifications like ISO 9001:2015 and ISO 27001:2013 have helped Invensis gain the confidence of over 1,000 global companies. The company banks on a process that strictly adheres to UK GAAP & UK_adopted IFRS standards. Accuracy is a hallmark of their services which they achieve through multi-level quality checks.  This helps them exceed client expectations at every turn. Some prominent brands that have banked on their services include Bank of America, Amazon, Verizon, etc. 

Top 10 Best Accounting Companies in the UK

Here is the list of the best accounting companies in the UK. Clients trust these accounting firms to drive business growth, ensure compliance, and maximize financial performance. 

1. Grant Thornton International Company

Specifics	Details
Key Services	Audit accounting, bookkeeping, financial tax preparation, accounting support, statutory accounts preparation, IFRS implementation & GAAP conversions.
Presence	More than 130 countries
Notable Clients	public sector institutions, private businesses.
Contact Details	30 Finsbury Square, London, EC2A 1AG +44 (0)20 7383 5100

Grant Thornton is one of the top accounting companies in the UK. It offers assurance and advisory and other related services to private companies, public interest entities etc. Grant Thornton, headquartered in London, is present in more than 147 countries and employs over 68,000 people. It has specialized industry teams with deep sector knowledge and experience. These teams provide tailored solutions and insights to clients based on the unique challenges and opportunities within their respective industries and requirements.

2. BDO Global Accounting Company

Specifics	Details
Key Services	Advisory, audit & assurance, tax & financial services.
Presence	162 countries
Notable Clients	Mid-market companies, listed companies, and not-for-profit organizations.
Contact Details	55 Baker Street London, W1U 7EU, United Kingdom Phone:020 7486 5888

BDO Global is a leading accounting and advisory firm operating in the United Kingdom. This accounting firm serves a diverse clientele, including privately held businesses, publicly listed companies, and multinational corporations. With a strong emphasis on industry expertise, BDO provides tailored solutions across various sectors, such as financial services, manufacturing, technology, healthcare, and real estate. This top accounting firm in the UK utilizes its global network of over 160 countries to assist clients with international expansion, cross-border transactions, and global compliance requirements. 

3. RSM International

Specifics	Details
Key Services	Assurance, tax advisory, management consulting, financial advisory, risk advisory.
Presence	UK, USA, Asia-Pacific countries, Africa, MENA
Notable Clients	publicly traded companies, privately held businesses, real estate and construction industries.
Contact Details	25 Farringdon Street London EC4A 4AB Phone: +44 (0)20 3201 8000

RSM is a renowned audit, tax, and consulting service in the UK. Over the years, this firm has built a strong, sustainable, and dynamic firm. This helps the firm to focus on supporting clients by taking the time to truly understand their needs. RSM has more than 4,715 partners and staff who operate from 30 locations across the UK and 64,000 people in more than 120 countries. The diverse presence of this UK accounting company allows it to meet client's needs who are dealing with and expanding cross-border businesses. 

4. Mazars

Specifics	Details
Key Services	Audit & assurance, financial advisory, taxation, global compliance & reporting, corporate reporting.
Presence	USA, Europe, Asia-Pacific, Africa & Middle East
Notable Clients	Financial services, large & listed companies, privately owned businesses, public & social sector organizations, small & medium sized businesses.
Contact Details	30 Old Bailey, London, EC4M 7AU United Kingdom

Mazars is among the largest accounting firms in the UK and a leading auditor to various public interest entities (PIEs). It employs more than 3300 people across 14 locations in the UK. This accounting firm offers a balanced perspective and expertise in audit, accounting, tax, financial advisory, outsourcing and consulting to its clients of all sizes. 

5. Smith & Williamson

Specifics	Details
Key Services	Accounting & assurance, tax advisory & compliance, corporate finance & transaction services.
Presence	All across the UK & Ireland
Notable Clients	Privately owned businesses, professional service firms, financial services firms, real estate and construction companies, technology and innovation companies.
Contact Details	25 Moorgate, London, EC2R 6AY Tel: 020 7131 4000 fax: 020 7131 4001

Smith & Williamson is a leading provider of accounting services including investment management, accountancy, tax, corporate, and financial advisory services. Its client base includes corporate entities, professional practices, non-profit organizations, etc. With 12 offices in the UK, Jersey, and Ireland and 1,700 people, this accounting firm in the UK aims to provide innovative accounting services.

6. PKF International

Specifics	Details
Key Services	Audit & assurance, corporate finance, fraud & forensic, taxation.
Presence	UK, USA, Canada, Australia
Notable Clients	privately owned businesses, publicly traded companies, multinational corporations, not-for-profit organizations.
Contact Details	15 Westferry Circus, London, E14 4HD +44 (0)20 7516 2200

PKF is a global accounting firm and shares its commitment to quality, integrity, and the creation of clarity in a complex regulatory environment. With offices in 440 cities, it operates in 150 countries across five continents. It specializes in offering high-quality audit, accounting  and advisory services to international and domestic organizations. The accounting firm applies every facet of the insights, expertise, and knowledge to ensure the client's experience exceeds all expectations and achieves the best possible results for their business. 

7. Crowe UK

Specifics	Details
Key Services	Audit & tax services, financial services, advisory & risk control.
Presence	All across the UK
Notable Clients	Multinational corporations, not-for-profit organizations, and high-net-worth individuals.
Contact Details	55 Ludgate Hill, London, EC4M 7JW T: +44 (0)20 7842 7100

Crowe UK is a leading accounting and advisory company for businesses across the United Kingdom. Since its inception, Crowe UK has grown into a prominent player in the industry, delivering a comprehensive range of audit, tax, advisory, and risk services to clients nationwide. Founded in 1982, Crowe UK has built a strong reputation for excellence, innovation, and client-focused service. With a team of 40,309 dedicated professionals, the firm is committed to delivering tailored solutions. They bank on their years of experience and expertise to offer strategic advice and practical solutions.

8. Baker Tilly International

Specifics	Details
Key Services	Financial services, forensic accounting, fraud investigation, tax & assurance services.
Presence	UK, US, Germany, Canada, UAE, Australia, India
Notable Clients	Financial institutions, government entities, private equity and venture capital firms.
Contact Details	2 London Wall Place London EC2Y 5AU United Kingdom +44 (0)20 7065 7900

Baker Tilly International is a leading network of accounting and advisory firms operating in the United Kingdom and worldwide. With a rich history dating back to 1987, this firm has become a trusted partner for businesses seeking expert financial and consulting services. As part of the Baker Tilly International network, Baker Tilly International UK has access to a global network of firms operating in 146 countries. This global reach enables the firm to provide clients with international insights, resources, and expertise and allows them to navigate complex accounting challenges.

9. Kingston Smith

Specifics	Details
Key Services	Accounting & bookkeeping, tax advisory & compliance, audit assurance, wealth management & finance planning.
Presence	Multiple offices across London and the southeast region
Notable Clients	Small and medium-sized enterprises, professional business firms, Startups and entrepreneurial ventures.
Contact Details	Charlotte Building 17 Gresse Street London W1T 1QL T: +44 (0) 20 7304 4646

Moore Kingston Smith is a distinguished accounting and advisory company operating within the United Kingdom. Founded in 1923 in Moore Kingston, Smith has evolved into a reliable partner for businesses seeking expert financial and consulting services. It has six offices in London and the southeast and is a London member of the Moore Global Network. The Moore Global Network consists of 34,000 people in 522 offices across 112 countries. The firm provides tailored services on audit & accountancy, tax, corporate finance, corporate recovery, business protection, charity fundraising & management, association management, forensic accounting, outsourcing, financial dispute resolution, bookkeeping, management accounts, etc. 

10. Haines Watts

Specifics	Details
Key Services	Accounts management, bookkeeping, online accounting services.
Presence	40 offices throughout the UK
Notable Clients	Private companies & business owners.
Contact Details	Haines Watts North London, 3rd Floor, Marlborough House, 298 Regents Park Road, Finchley, London, N3 2SZ Tel: 020 7989 8999 Email: finchley@hwca.com

Haines Watts is one of the prominent accounting companies in the UK, with 40 offices across the country. The accounting firm offers a diverse array of specialized services such as online accounting, audit and assurance, forensic litigation support, business improvement, funding and asset finance, and UK and international tax consultancy. Haines Watts boasts a vast clientele exceeding 35,000, including owner-managed businesses, private equity firms, corporate businesses, and more. 

To know more about Invensis and its proficiency in finance and accounting services get in touch with us.