Top 10 Accounting Firm in the UK To Watch in 2026

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Whether you’re a startup managing tight budgets or an established business aiming for financial freedom, partnering with the right accounting services provider matters a lot. In this blog, we explore the top accounting firms in the UK, from global giants like EY and PwC to tech-savvy specialists like Moore and Whiz Consulting. Each firm offers a blend of human expertise and cloud-based tools to meet your dynamic business needs.

Read on to discover which firm aligns best with your goals and how to make the smartest choice for your financial future.

From Deloitte to Crowe: Comparing Top 10 Accounting Firms in UK

The top accountancy firms in the UK include Deloitte, EY, PwC, KPMG, and BDO. Over the years, these have established themselves as pioneers in the field of finance and accounting and paved the way for innovation and high professional standards. Let’s dive into what these firms offer, what sets them apart, and why they remain the top choice for businesses and professionals alike.

1. Deloitte

Founded in 1845, Deloitte is part of the global “Big Four,” and one of the top accounting firms in UK with more than 27,000 professionals serving clients in finance, healthcare, public sector, private equity and energy sector. Being one of the top auditing firms, they offer audit prep, business and international tax, payroll, finance transformation, and strategy consultation services.

Leveraging platforms such as SAP, Oracle, Salesforce, Google Cloud, Adobe, and UiPath, Deloitte automates your financial operations, offering a faster turnaround time. As a truly global leader, they pair deep-industry insight with proprietary solutions like Deloitte Omnia to enhance the auditing process.

2. PwC

With presence in the UK since 1998, PwC is another top accounting firm in the UK. The company has over 25,000 professionals working to deliver audit, accounting, tax compliance, financial planning and analysis, and finance statement prep services to clients. They integrate Microsoft 365, NetSuite, Salesforce, SAP, Sage, and Workiva, offering you tech‑driven workflows and solutions.

Renowned for championing diversity and sustainability, PwC UK blends human expertise with smart automation to help clients navigate complex situations, mitigate risk, and secure long‑term financial growth.

3. EY

Among the biggest accounting firms in the UK is EY, with its solid workforce of 20,000+ professionals. As a major auditing firm, their team delivers financial transformation, risk advisory, audit, assurance, forensic accounting, and tax compliance.

They hold expertise in accounting proficiency in MS Azure, SAP, Nvidia, Shopify, and UiPath, and use automation, AI, and analytics to provide clients with real‑time insights, M&A advisory, and make tax strategies. EY’s global scale, sector expertise, and tech integration empower businesses to build trust, reduce complexity, and drive growth that lasts long.

4. KPMG

Established in 1987, KPMG UK is part of the global KPMG network, with over 14,000 professionals serving multinational corporations and SME businesses. They offer tax strategy, VAT and corporate tax, IFRS & UK GAAP compliance, automated operations, risk management, audit, and consulting services.

With expertise in Microsoft, Oracle, SAP, Salesforce, and IBM, KPMG leverages these platforms to provide smarter audits, seamless compliance, and operational efficiency for your business. Boasting as one of the largest accounting firms in the UK, their sector expertise and risk management services help businesses keep on financially growing stress-free.

5. BDO

Established in 1903, BDO is one of the top accounting firms in the UK with over 8,000 professionals delivering tax support (corporate, VAT, and indirect tax), business planning, payroll, financial reporting advisory, and HMRC compliance. They utilise MS Dynamics, QuickBooks, Twinfield, AccountsIQ and Xero to deliver personalised services with strong industry expertise to solve your business queries.

BDO’s tailored approach and tech‑driven insights position them as a trusted growth partner for SMEs and large enterprises seeking scalable financial solutions.

6. RSM UK

Founded in 1964, RSM UK is a leading mid‑market firm with over 5,000 employees offering audit, tax support (corporate, VAT, and indirect), risk advisory, and international services. They blend traditional methods with modern accounting platforms, such as NetSuite, Sage, Microsoft 365, and proprietary tools like Pay Manager, People Manager, and InTime.

Serving clients in tech, media, manufacturing, education, energy, real estate, and NGOs, RSM’s sector expertise empowers mid‑sized businesses to streamline their operations and boost growth. RSM UK offers you comprehensive and data‑driven solutions that are moulded according to your business needs.

7. Grant Thornton UK

Established in 2004, Grant Thornton, one of the biggest accounting firms in the UK, employs more than 5,000 professionals. It delivers comprehensive tax support, CFO services, statutory financial statements, and month‑end reporting services. Popular with mid‑sized businesses and public interest entities, they extend into ESG advisory, financial due diligence, and operational improvement.

By integrating Dayshape, Leap, MS Power BI, and the Workday suite, Grant Thornton blends sector expertise with advanced technology to help you grow sustainably and streamline financial processes.

8. Forvis Mazars

Founded in 1945, Forvis Mazars has grown into an international firm with over 3,000 UK professionals delivering financial advisory, tax support, accounting, payroll, and risk consulting services. They offer expertise across real estate, retail, manufacturing, energy & infrastructure, and media & tech sectors.

Forvis Mazars is counted among the top ten accounting firms as it fuses technical excellence with their client‑first approach. Leveraging Xero, SAP, NetSuite, MS Dynamics 365, and Sage, Forvis Mazars combines digital expertise and tailored services to help your business manage operations for the long run.

9. S&W Group

Founded in 1881 and one of the top auditing firms in the UK, Smith & Williamson, now rebranded as S&W Group, employs over 4,000 professionals. It offers accounting advisory, business outsourcing, payroll, comprehensive tax planning and compliance, and digital and forensic services.

Their services emphasise strategic guidance, financial planning, and growth advisory. They work with accounting software such as FinTech North, Relativity, and Dayshape to empower your business with optimised financial operations, manage risks, and help achieve long‑term objectives.

10. Crowe UK

Founded in 2004, Crowe UK is part of the Crowe Global network with over 1,400 UK professionals delivering audit, tax advisory services (HMRC compliance and VAT support), bookkeeping, monthly cash‐flow forecasting, app implementation, payroll, and corporate finance.

With thorough sector expertise in real estate, energy, retail, and healthcare, they blend personalised services with cloud platforms such as Sage, Microsoft Azure, Xero, and Dext for valuable insights. Extensive industry-expertise combined with innovative technology allows Crowe to provide reliable accounting services and emerge as one of the top accounting firms in the UK.

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Top 10 Outsourced Accounting and Bookkeeping Firms in the UK

Along with the firms rooted in the UK, the country has seen a significant growth in accounting services. Firms like The Accountancy Partnership, The Numbersmith, Whiz Consulting, Watermill Accounting, and Moore UK have been providing outsourced accounting services without needing to establish an in-house setup. These firms are renowned for their holistic F&A services while helping UK businesses save significantly on the overheads.

1. The Accountancy Partnership

Founded in 2006, the Accountancy Partnership brings a modern touch to virtual accounting for UK freelancers and small businesses. With a robust team of 100+ professionals, they offer precise bookkeeping, payroll, VAT, and self-assessment returns, along with detailed financial reporting. They also manage quarterly RTI returns, including CIS returns and submissions.

The company uses its proprietary cloud bookkeeping tool, Pandle, to streamline its workflow, leverage accounting automation, reduce turnaround time, and simplify tax compliance.

2. 123Financials

Established in 2017, 123Financials is listed among the top accounting firms in the UK, and they support small businesses, startups, freelancers, and landlords with practical F&A services. With a team of 40+ accountants and bookkeepers, they provide tax planning, VAT and Capital Gains Tax support, R&D tax credit advice, and cash-flow management while ensuring full HMRC compliance.

By leveraging virtual accounting platforms such as Xero, QuickBooks, and Zoho Books, 123Financials delivers efficient, transparent accounting and bookkeeping services. Their technology-driven approach helps businesses simplify tax management, maintain healthy cash flow, and gain better financial control to support sustainable growth.

3. Moore UK

Moore brings more than a century of expertise to the modern financial services space. As part of the global Moore network (founded in 1907), they deliver bookkeeping, advisory, payroll (including PAYE deductions, pension administration, and P60 prep), tax services (VAT returns, VAT advice, registration), and audit services for clients worldwide.

Their large team of 5,000+ professionals use platforms like Xero, QuickBooks, Sage One, and FreeAgent to streamline operations. Combining international scope with personalised outsourced accounting services, Moore UK empowers both SMEs and large enterprises with scalable, tech-integrated financial solutions and forward-thinking strategies.

4. The Numbersmith Limited

Founded in 1992, the Numbersmith is a UK-based accounting firm offering comprehensive accounting and bookkeeping services to help businesses streamline their finances. With a team of 45+ professionals, they deliver reconciliations, payroll, transaction recording, VAT returns, and ongoing support to ensure smooth HMRC compliance for growing businesses.

By leveraging cloud accounting platforms such as QuickBooks and Xero, The Numbersmith enables efficient, transparent financial management. With nearly three decades of experience, they are particularly well-suited to small businesses and startups seeking reliable expertise, improved financial control, and long-term stability.

5. Whiz Consulting

Established in 2014, Whiz Consulting has earned its reputation as one of the top accounting outsourcing firms in the UK. They have expertise in providing remote bookkeeping, payroll processing, tax compliance support (VAT compliance & UK IFRS), financial reporting and analysis, and virtual CFO services. Their expert virtual accountants offer financial services across sectors like real estate, hospitality, media and marketing, healthcare, and ecommerce.

With over 10+ years of experience, they have strong proficiency in online accounting software, including Xero, NetSuite, QuickBooks, Zoho Books, and MS Dynamics. With a team of 150+ professionals, Whiz Consulting delivers tailored F&A solutions that are reliable and scalable. Also, they are an SOC 2 and ISO 1900:27001 certified firm, which further fortifies their reputation for being a trusted outsourcing accounting firm.

6. Watermill Accounting

Established in 2009, Watermill Accounting is a UK-based firm with a team of 40+ accountants and bookkeepers delivering year-end accounts, monthly bookkeeping, reconciliations, PAYE setup, VAT registration, R&D tax credits, cash-flow forecasting, and tax planning. They support corporations, startups, and freelancers seeking structured, reliable financial management.

Using top accounting software such as Xero and QuickBooks, Watermill Accounting helps clients maintain accurate records, improve cash-flow visibility, and make informed strategic decisions. Their technology-led approach supports sustainable growth while strengthening financial readiness for funding and long-term expansion.

7. PKF

Established in 1969, PKF is one of the biggest accounting firms in UK, which operates with more than 21,000 professionals, bringing decades of cross-border experience to the table. They offer a full spectrum of services, including accounting, VAT support, statutory and internal audits, risk management, and detailed financial planning.

They use cloud accounting software such as Xero, QuickBooks, and Sage to deliver real-time insights. With a diverse team of online professionals, the company provide its services across various industries such as NPOs, retail, IT, manufacturing, real estate, and hospitality.

8. Meru Accounting

Founded in 2013, Meru Accounting has grown into a large accounting firm with a team of 400+ accountants and bookkeepers delivering end-to-end finance and accounting services. Their services include accounts payable and receivable management, VAT claim calculations, CIS return submissions, payroll processing, and tax return preparation for businesses of all sizes.

By leveraging platforms such as QuickBooks, Xero, Zoho Books, Odoo, FreshBooks, and NetSuite, Meru Accounting ensures seamless financial management. With experience across industries such as construction, e-commerce, real estate, marketing, and pharma, they tailor their approach to each client’s business structure, enabling accuracy, compliance, and scalable growth.

9. Accountancy Cloud

Founded in 2014, Accountancy Cloud provides specialised virtual accounting, CFO services, tax advisory, bookkeeping, year‑end accounting, VAT return prep, and R&D tax credit support. Their versatile team of about 50 accountants tailor these services specifically for startups and SMEs across tech, SaaS, retail, and ecommerce sectors.

They integrate with Xero, Sage, Dext, PayPal, Stripe, Shopify, and QuickBooks to automate your workflows and deliver real-time clarity. Supported by a boutique UK team of certified experts, they offer scalable finance services that drive growth and free up your time to focus on other core business activities.

10. Makesworth Accountants

Established in 2012, Makesworth Accountants supports businesses of all sizes with a team of around 45 accounting professionals. They work across industries, including construction, travel and tourism, real estate, and hospitality, delivering reliable finance and accounting support tailored to each sector’s needs.

Leveraging cloud platforms such as QuickBooks, Sage, FreeAgent, and Xero, Makesworth Accountants provides year-end accounts, bookkeeping, payroll, transaction recording, tax planning, R&D tax credits, and VAT returns. Their hands-on, data-driven approach helps clients streamline financial operations, stay compliant, and support steady business growth.

How to Choose a Suitable Accounting Firm in the UK?

When it comes to choosing the right accounting firm in the UK, there are a lot of factors that come into play. Factors such as years of experience, software proficiency, industry expertise, and pricing compatibility are important aspects to consider when partnering with the right firm. Here’s a comprehensive guide to help you make an informed decision:

What Are Your Business Needs?

Before you begin scanning through the list of top accounting firms in UK, understand what your business actually needs. Are you struggling with daily bookkeeping, looking for payroll support, or aiming to outsource your entire finance function? The clearer you are about your goals, the easier it becomes to filter out firms that aren’t a good fit.

Look for Relevant Qualifications

You wouldn’t hire an unlicensed contractor to build your house, so why settle for an underqualified accountant? Look for firms with certifications from recognised UK accounting bodies like ACCA, ICAEW, or CIMA. These credentials signify rigorous training, ethical standards, and continued professional development. Further, qualified accountants can navigate complex tax regulations, know how to leverage AI in accounting workflows, and offer peace of mind for long-term success.

Experience in Your Industry

Every industry is unique, so your accountants should understand the nuances of yours. Whether you’re in ecommerce, juggling multiple payment gateways, or in construction, navigating CIS deductions, industry-specific expertise makes a massive difference. A firm with relevant experience won’t just keep your books tidy; they’ll provide insights, spot opportunities, and help you avoid common pitfalls.

Technology and Software

Top accounting firms in the UK use accounting automation platforms like Xero, QuickBooks, Zoho Books, NetSuite, and MS Dynamics to simplify collaboration and amplify financial reporting. Ask yourself: Is this firm you are looking at fluent in the tools your business already uses? Better yet, can they introduce smarter systems that automate workflows and cut down manual tasks? Don’t just ask what software they support, ask how they use it to make your life easier.

Fee Structure

Some firms charge hourly, others offer fixed monthly packages, and a few might surprise you with “extra” costs buried in the fine print. You need to know what you’re paying for, how often you’ll be billed, and whether there’s flexibility as your business grows. Look for accounting firms that tailor their pricing to your business stage. Clear pricing means no surprises, and that’s what you want.

Communication and Accessibility

You shouldn’t have to wait three days for an email reply or chase down your accountant for a simple update. Whether it’s regular check-ins, prompt support, or access to a dedicated account manager, your firm should be reachable and responsive. Bonus points if they offer multiple communication channels, such as Google Meets, MS Teams, Slack, and Zoom. Choose someone who’s available when it counts, not just when it’s convenient.

Grow Sustainably with the Right Accounting Firm by Your Side!

Choosing the right accounting firm can enhance efficiency, accuracy, and bring peace of mind for your business. Whether you’re drawn to the global capabilities of Deloitte, PwC, EY, KPMG, and BDO, or prefer the personalised, tech-forward approach of firms like The Accountancy Partnership, Moore, The Numbersmith, or Whiz Consulting, these firms deliver finance and virtual accounting services that align with your specific needs.

Sources:

• https://clutch.co/
• https://www.accountancytoday.co.uk/