Accounting Companies Using reCAPTCHA in the UK: 1,209 Active Firms (2026)
Accounting firms using website bot checks provide audit, tax and advisory services while filtering automated contact-form traffic in the UK.
For accountancy and audit practices, bot-checking usually sits at the edge of digital intake: quote requests, payroll enquiries, audit tender forms and tax-advice callbacks. Adoption tends to mark a firm that treats its website as an operating channel rather than a brochure, with marketing, IT and risk teams sharing responsibility. The signal is clearest among multi-office practices serving SMEs, owner-managed businesses and larger corporate clients, where inbound triage has to separate nuisance traffic from time-sensitive compliance work. The tool is low-touch, but it implies maintained forms, analytics and some tolerance for third-party scripts in the client-acquisition stack.
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Across the UK, 1,209 actively trading accounting and audit companies run this bot-checking system. Reported headcount across the cohort totals 3,756 people. Within the sector's detected security tooling, the system ranks first at 92.1%, ahead of a long tail of alternatives. Registered-region skew is visible but not purely London-centric: London accounts for 20.7% of the cohort, followed by the South East at 13.0%, the East of England at 11.7%, the North West at 11.2% and the West Midlands at 8.9%.
Statutory audit changes the obligations around digital intake for many of these adopters. The FRC is the Competent Authority under the Statutory Auditors and Third Country Auditors Regulation 2016, while statutory auditors and audit firms are registered and supervised through Recognised Supervisory Bodies. Contact forms can carry payroll, tax, audit and assurance enquiries, so bot checks sit near privacy, confidentiality and client-screening processes rather than pure marketing. FRC accountancy profession reporting also points to consolidation: registered statutory audit firms fell from 5,007 in 2020 to 3,760 in 2024, including a 6.9% fall during 2024.
Adoption appears likely to remain pragmatic rather than strategic. Accounting practices tend to keep legacy websites live for long periods, so bot checks are likely to persist where they are bundled into form tools, hosting packages or marketing-agency builds. Migration pressure may come less from security policy than from friction: inaccessible challenges, consent concerns and a broader move towards managed intake portals for higher-value advisory work. Smaller practices may accept off-the-shelf checks, while multi-office firms appear more likely to fold bot defence into governance over client onboarding and website analytics.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
Adoption by company size
Adoption of reCAPTCHA rises with company size across the trading UK accounting companies in this cohort. 2.4% of the 34,652 companies with under 10 employees run reCAPTCHA (845 detected). 29.2% of the 1,209 companies with 10–50 employees run reCAPTCHA (353 detected). 33.3% of the 60 companies with over 50 employees run reCAPTCHA (20 detected). That is a 30.9% gap between the over 50 employees and under 10 employees bands.
1,209
Active firms
2026
92.1%
Of detected Security share
UK accounting
7
Median headcount
Filed accounts
2,562
Verified directors
Across this cohort
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Key facts
About 1% of the trading cohort reports turnover above £5M (18 of 1,209 firms) — the rest sits below that revenue band.
3% of the cohort was incorporated since 2022 (43 firms), so a sizeable share is in its first few filing cycles.
Among accounting and audit firms with a detectable security tool, this bot-check system has a 92.1% (1,209) share, ahead of alternatives at 3.0% (39), 3.0% (39) and 2.6% (34).
Website stacks in the cohort are mostly content-managed: 77.7% (939) also show a content-management system, while 49.6% (600) show web analytics and 28.0% (339) show a contact-form plugin.
London accounts for 20.7% (250) of the cohort, followed by the South East at 13.0% (157) and the East of England at 11.7% (142).
Statutory audit is supervised by the FRC as Competent Authority under the Statutory Auditors and Third Country Auditors Regulation 2016, with registration handled through four Recognised Supervisory Bodies.
Registered statutory audit firms fell to 3,760 in 2024 from 5,007 in 2020, a 24.9% decline over five years.
Security market share among UK Accounting
Share of the 1,313 UK Accounting with a detectable system. As of June 2026.
What else do reCAPTCHA-running Accounting run?
Share of the 1,209 reCAPTCHA-running UK companies where each technology was also detected. As of June 2026.
Where reCAPTCHA Accounting are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
7
Median headcount
£333.6K
Median UK turnover
1.5%
Above £5M turnover
43
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 1,996 companies, alongside financials and websites, in one CSV file.
Top UK Accounting using reCAPTCHA
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 2 filingsProvides accountancy and business advisory services including audit and assurance, tax compliance and planning, payroll, corporate finance, outsourced finance functions, wealth management, IT…
Serves UK businesses and individuals, including food production, industrial and logistics, retail and wholesale, technology, professional services, and organisations trading internationally.
Financial Health
HealthyHealthy · Profitable, Growing, Hiring · 109% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides accounting, audit and assurance, tax advisory, corporate finance, restructuring, risk and regulatory consulting services. Also offers business outsourcing, forensic and digital advisory to…
Serves businesses from startup to exit, entrepreneurs, families and business owners, plus charities, public sector bodies, financial services, fintech, hospitality, manufacturing, real estate,…
Financial Health
StrongStrong
Location
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Financial sub-scores
Computed from 5 filingsOperates an international network of independent accounting and advisory firms. Provides audit and assurance, tax, accounting, corporate finance, restructuring, ESG consulting, outsourcing, and risk…
Serves businesses, charities and private clients operating internationally, across sectors including finance, energy, healthcare, real estate, construction, technology, media and telecoms.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 4y
Location
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Computed from 3 filingsProvides accountancy and advisory services including audit, financial reporting, outsourced accounting, payroll, and tax planning and compliance. Also offers wills and probate, corporate finance,…
Serves B2B and nonprofit clients, including owner-managed SMEs, start-ups, family businesses, mid-market and private equity-backed companies, medical practices, solicitors, charities, pension schemes…
Financial Health
HealthyHealthy · 3% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides chartered accountancy and business advisory services, including audit and assurance, tax planning and compliance, corporate finance, outsourced finance functions, payroll, and company…
Serves businesses, not-for-profits and private clients, including charities, education bodies, technology and media companies, property investors, high-net-worth individuals, expats, and…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
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Computed from 5 filingsProvides accounting and advisory services including audit and assurance, corporate tax and VAT, corporate finance, payroll, cloud accounting, financial planning, and business recovery, serving…
Serves owner-managed and mid-market businesses, academy schools, charities, professional practices, FCA-regulated firms and private clients across sectors including automotive, healthcare, property,…
Financial Health
StrongStrong · Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and professional advisory services including audit, financial reporting, tax advisory, corporate finance, and business recovery. Advises businesses on compliance, transactions,…
Serves mid-market businesses and their owners, finance leaders and management teams needing professional advisory support across audit, accounting, tax, corporate finance and business recovery.
Financial Health
HealthyHealthy · -67% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and financial advisory services including company accounts preparation, business audits, tax compliance and planning, bookkeeping, payroll, corporate finance, business…
Serves startups, SMEs and international groups across the UK and internationally, including listed companies, UK subsidiaries, charities and businesses in technology, retail/hospitality, property,…
Financial Health
HealthyHealthy · Hiring · 6% CAGR over 4y
Location
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Computed from 3 filingsProvides accounting and advisory services including audit and assurance, bookkeeping, payroll, company secretarial support, corporate and personal tax planning, VAT and customs advice, valuations,…
Serves businesses from start-ups and small firms to international groups, plus private individuals and families. Also targets charities, schools, regulated firms and sector-specific organisations…
Financial Health
StrongStrong · Hiring · 150% CAGR over 2y
Location
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Computed from 3 filingsProvides audit, accounting and tax services to businesses and individuals, including compliance, payroll, VAT and business taxation. Also offers corporate finance, insolvency and recovery, probate,…
Serves SMEs, owner-managed businesses, charities, education providers, professional practices, landed estates, agricultural, hospitality, manufacturing, technology and renewables clients, plus…
Financial Health
StableStable · Profitable · 2% CAGR over 2y
Location
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Computed from 5 filingsProvides accountancy and taxation services for businesses, including financial accounting, statutory audits, payroll management, and tax compliance and planning. Also supports clients with accounting…
Serves B2B clients ranging from start-ups to large technology and manufacturing companies, including owner-managers and finance teams.
Financial Health
StrongStrong · Growing, Hiring · 20% CAGR over 4y
Location
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Computed from 3 filingsProvides accountancy and tax services including audit, accounts preparation, bookkeeping, payroll, corporate finance and company secretarial support. Also advises on acquisitions, disposals, business…
Serves businesses of all sizes and private clients across the UK, including sports, media, entertainment, construction, food and farming, manufacturing, retail, leisure, tourism, not-for-profit and…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 2y
Location
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Computed from 3 filingsProvides chartered accountancy and business advisory services including audit, bookkeeping and accounts preparation, corporate and personal tax planning, payroll administration, VAT and R&D tax…
Serves businesses, charities, academies, professionals and individuals, with sector focus including agriculture, healthcare, hospitality, manufacturing, property, retail, technology, transport and…
Financial Health
HealthyHealthy · Profitable, Hiring · 6% CAGR over 2y
Location
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Computed from 3 filingsProvides accountancy and business advisory services, including statutory audit, tax compliance and planning, payroll bureau services, business development advice, financial services support, and HR…
Serves small businesses, limited companies and business owners across sectors, including private medical practices and property/letting businesses, plus individuals needing personal tax support; HR…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 3 filingsProvides accountancy and business advisory services including audit, tax advisory, bookkeeping, payroll, outsourced finance functions, financial modelling and business planning. Supports companies…
Serves business leaders and management teams, mainly SMEs, across construction/property, financial services, IT/telecoms, media/creative, private equity, recruitment/training, and…
Financial Health
HealthyHealthy · Growing, Hiring · 8% CAGR over 2y
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Computed from 3 filingsProvides accountancy and tax advisory services to individuals, businesses and not‑for‑profit organisations. Services include accounts preparation, audit and assurance, bookkeeping, payroll, tax…
Serves individuals, sole traders, start-ups, SMEs, large enterprises and not-for-profit organisations across Wales, with sector focus on charities, creative industries, healthcare, manufacturing,…
Financial Health
StrongStrong · Hiring · 13% CAGR over 2y
Location
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Computed from 3 filingsProvides chartered accountancy and tax advisory services for businesses and individuals, including audit and assurance, bookkeeping, payroll, company secretarial support, cloud accounting, cash flow…
Serves businesses, charities and individuals across Portsmouth, Hampshire and southern England, including medical and dental practices, property firms, landlords, construction businesses, care homes,…
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 2y
Location
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Computed from 3 filingsProvides accountancy and audit services for businesses and individuals, including bookkeeping, payroll, tax compliance and VAT. Also offers corporate finance advice, business planning, consultancy,…
Serves SMEs and larger companies, LLPs, professional partnerships, solicitors, charities and individuals, with clients across the UK and overseas in Europe, the United States and the Far East.
Financial Health
HealthyHealthy · Profitable · 0% CAGR over 2y
Location
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Computed from 3 filingsProvides chartered accountancy and business advisory services including audit and assurance, financial statements, tax compliance and planning, payroll and company secretarial services, cloud…
Serves SMEs and private clients, including business owners, directors, managers and individuals needing personal tax, estate, probate or retirement planning support.
Financial Health
HealthyHealthy · Growing · 3% CAGR over 2y
Location
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Computed from 4 filingsProvides chartered accountancy and business advisory services including audit and assurance, financial accounting, bookkeeping, payroll, VAT and tax planning, company secretarial support, and…
Serves owner-managed and growing businesses in Yorkshire, including manufacturing, solicitors, construction/property, road haulage, recruitment, nurseries, software/IT and printing, plus individuals…
Financial Health
HealthyHealthy · Growing, Hiring · 5% CAGR over 3y
Location
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Computed from 4 filingsProvides accounting and business advisory services including auditing, bookkeeping, payroll, tax planning, VAT advice, corporate finance, restructuring support, and probate and estate administration…
Serves UK businesses, charities and individuals, with sector focus on construction, health and social care, hospitality, manufacturing and engineering, professional services, property, recruitment…
Financial Health
StrongStrong · Growing, Hiring · 18% CAGR over 3y
Location
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Computed from 3 filingsProvides accounting and tax advisory services including financial accounts, bookkeeping, VAT and payroll, audit, and tax compliance. Also offers corporate finance, business advisory, insolvency…
Serves owner-managed businesses, limited companies, family offices, schools and charities, plus individuals with personal tax, wealth, probate or insolvency needs.
Financial Health
StrongStrong · Hiring · 41% CAGR over 2y
Location
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Computed from 3 filingsProvides accounting, audit and tax advisory services, including annual accounts preparation, corporation tax and VAT returns, bookkeeping, payroll, management accounts and personal tax. Also offers…
Serves businesses and private clients, including limited companies, solicitors subject to accounts rules, Innovate UK-funded businesses, organisations considering M&A, and individuals with personal…
Financial Health
StrongStrong
Location
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Computed from 4 filingsProvides accountancy and professional services including audit, tax planning and compliance, payroll, corporate finance, wealth management and business advisory. Works with businesses, organisations…
Serves businesses at launch, growth and succession stages, third sector organisations, and private individuals across the UK, including owners, finance teams, trustees and personal tax clients.
Financial Health
StrongStrong · Growing · 1% CAGR over 3y
Location
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Computed from 3 filingsProvides accounting and business advisory services including accounts preparation, audit and assurance, corporate finance, personal and corporate tax advice, outsourcing and support for businesses,…
Serves businesses, business owners, individuals and not-for-profit organisations needing accounting, tax, audit, assurance and corporate finance support, including startups and those buying, selling…
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
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Computed from 5 filingsProvides chartered accountancy services to businesses and individuals, including audit, tax planning, bookkeeping, payroll, corporate finance, R&D tax relief claims, cloud accounting, and support…
Serves businesses, charities, start-ups and individuals in Essex, London, across the UK and internationally, including business owners and private clients with tax, estate or inheritance planning…
Financial Health
HealthyHealthy · Hiring · 78% CAGR over 5y
Location
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Computed from 5 filingsProvides chartered accountancy services including bookkeeping, management accounts, payroll, tax planning and compliance, statutory and regulatory audits, and business advisory support. Also assists…
Serves UK growth businesses, charities and not-for-profits, including clients in construction, professional services, hospitality, healthcare, social care, property, retail and technology.
Financial Health
StableStable · -67% CAGR over 4y
Location
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Computed from 3 filingsProvides chartered accountancy and business advisory services including audit, accounts preparation, tax planning and compliance, payroll bureau services, cloud bookkeeping, company formation,…
Serves SMEs, owner-managed businesses, charities, academies and sector-specific clients in agriculture, healthcare, property and construction, travel and legal services, alongside individuals needing…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides accounting, audit and assurance, tax compliance and planning, payroll, bookkeeping, and statutory accounts preparation. Also offers business consultancy, financial advisory, company…
Serves small and midsize businesses and accountancy practices, primarily in the UK, with international clients across markets linked to the UK, India, UAE, USA and Nepal.
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and business advisory services including bookkeeping, management accounts, audit, tax planning and payroll. Advises on corporate finance, business acquisitions, funding, R&D tax…
Serves UK owner-managed businesses and clients in construction, dental, education, manufacturing, medical, property, transport, wholesale and retail, plus individuals and families needing personal…
Financial Health
StrongStrong · Hiring · 33% CAGR over 4y
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Computed from 4 filingsProvides accountancy and financial advisory services including accounts preparation, audit, bookkeeping, payroll, and tax advice. Supports businesses, contractors and individuals with management…
Serves businesses of all sizes, including SMEs, large businesses, start-ups and contractors, plus high net worth individuals, landlords and athletes needing accountancy, tax and advisory support.
Financial Health
HealthyHealthy · 9% CAGR over 2y
Location
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Computed from 3 filingsProvides chartered accountancy and tax advisory services including audit and accounting, bookkeeping, VAT and management accounts, corporate and personal tax planning, payroll and HR administration,…
Serves UK businesses of varying sizes, from start-ups to established companies, plus individuals with tax affairs. Sector focus includes not-for-profit, construction, financial services, sport and…
Financial Health
StrongStrong · Hiring · 6% CAGR over 2y
Location
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Computed from 5 filingsProvides accountancy and advisory services to businesses and individuals, including financial accounts, audit, bookkeeping, payroll, VAT, corporate and personal tax planning, company secretarial…
Serves SMEs, start-ups, small companies, medium and large enterprises, plus individuals and families, mainly across Dudley and the wider West Midlands, with sector focus including medical and…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 5y
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Computed from 3 filingsProvides accountancy services for businesses and individuals, including year-end accounts, audit, bookkeeping, management accounts, VAT compliance, payroll and CIS, tax returns and planning, startup…
Serves UK businesses of all sizes, from start-ups to established firms, plus private individuals needing tax support, with sector focus on construction, property and landlords, and charities.
Financial Health
HealthyHealthy · -2% CAGR over 2y
Location
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Computed from 4 filingsProvides accounting and advisory services including statutory audits, preparation of accounts, bookkeeping, payroll, VAT returns and tax planning for businesses and individuals. Also offers forensic…
Serves sole traders, partnerships, limited companies, SMEs, employers, start-ups, charities and not-for-profit organisations, primarily around Coventry, Leamington Spa and Warwickshire.
Financial Health
StableStable · 0% CAGR over 3y
Location
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Computed from 5 filingsProvides accountancy and tax advisory services for businesses and individuals, including statutory accounts preparation, audit and assurance, tax planning and compliance, company secretarial support,…
Serves SMEs and larger businesses across diverse sectors, as well as individual personal tax clients. Sells to business owners needing accountancy, audit, tax and finance support, including startups…
Financial Health
HealthyHealthy · -66% CAGR over 4y
Location
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Computed from 5 filingsProvides chartered accountancy and tax advisory services to businesses and individuals, including audit, bookkeeping, payroll, corporate finance, business recovery, company secretarial support,…
Serves start-ups, established businesses, family firms, charities and sector-specific clients, alongside individuals needing tax, estate, probate and wealth-related support, with clients nationally…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
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Computed from 5 filingsProvides chartered accountancy services to businesses and individuals, including audit, bookkeeping, payroll, management accounts, tax planning and compliance, VAT, company secretarial support,…
Serves businesses, startups, landlords, medical and dental professionals, solicitors, construction firms, international exporters, and private individuals in Surrey, London, Sussex and overseas.
Financial Health
HealthyHealthy
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Computed from 3 filingsProvides accountancy, tax compliance and advisory services including year‑end accounts, VAT, payroll, bookkeeping and audit, alongside corporate finance, wealth management, mortgage advice, pension…
Serves a mix of UK businesses, sole traders, limited companies, LLPs, partnerships, charities and private individuals, including landlords and clients seeking wealth, mortgage or pension advice.
Financial Health
StrongStrong
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Computed from 4 filingsProvides accounting and business advisory services including financial reporting, tax planning and compliance, audit, and outsourced finance functions. Works with businesses and individuals to…
Serves businesses of varying sizes across the UK, selling to company owners and management teams seeking accountancy, business advisory, planning and outsourced finance support.
Financial Health
HealthyHealthy · Hiring · 7% CAGR over 3y
Location
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Computed from 5 filingsProvides chartered accountancy and business advisory services, including preparation of accounts, tax planning and compliance, audit, VAT services, and business consultancy for companies and…
Serves businesses seeking accountancy and advisory support, including buyers needing tax, audit, accounts, VAT and business consultancy services. Targets business clients rather than consumers.
Financial Health
StrongStrong · Hiring · 15% CAGR over 4y
Location
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Computed from 4 filingsProvides chartered accountancy services including business accounting, audit, bookkeeping, payroll, VAT, and corporate tax planning. Advises on business start-ups, company secretarial matters, and…
Serves owner-managed and small-to-medium businesses, companies of all sizes, professional clients, employers, start-ups, and individuals needing personal tax or estate-planning support.
Financial Health
HealthyHealthy · -76% CAGR over 3y
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Computed from 5 filingsProvides accounting and tax services to businesses and individuals, including bookkeeping, payroll, statutory accounts, VAT compliance, audit, management accounts, and business tax planning. Also…
Sells to UK businesses and individual taxpayers needing accounting and tax support, including startups, growing companies, medical practices, property landlords, and organisations requiring audit,…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
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Computed from 5 filingsProvides accounting, bookkeeping and VAT services, payroll and pension auto‑enrolment compliance, statutory audits and assurance, tax planning and corporation and personal tax services, plus company…
Serves individuals and small to medium-sized businesses needing accounting, audit and tax support, including organisations requiring payroll, VAT, compliance, company secretarial services and SRA…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
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Computed from 4 filingsProvides chartered accountancy and audit services including financial accounting, audit and assurance, payroll, bookkeeping and cloud accounting. Advises businesses and individuals on corporate and…
Serves entrepreneurs, owner-managed businesses and private clients, including tech companies, intellectual property owners, non-UK domiciliaries and individuals with succession planning needs.
Financial Health
StrongStrong · Growing, Hiring · 59% CAGR over 3y
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Computed from 5 filingsProvides accountancy and business advisory services for businesses and individuals, including financial accounts preparation, audit and assurance, bookkeeping, payroll, VAT and tax compliance, tax…
Serves large and small businesses, owner-managed firms, start-ups, not-for-profits and private individuals across East Anglia, with sector focus on agriculture, construction, finance, manufacturing,…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 5y
Location
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Financial sub-scores
Computed from 3 filingsProvides accountancy and audit services to businesses and individuals, including annual accounts preparation, payroll, VAT and tax compliance, corporation tax planning, company secretarial support,…
Serves businesses across the UK needing accountancy, audit, payroll, VAT and tax support, with additional services for business owners and individuals requiring personal tax, estate, trust or…
Financial Health
HealthyHealthy · -3% CAGR over 2y
Location
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Financial sub-scores
Computed from 3 filingsProvides chartered accountancy and business advisory services including auditing, financial accounting, payroll, outsourced accounting, corporate and personal tax planning, VAT advice, tax…
Sells to owner-managed businesses and business owners seeking accounting, tax and advisory support, including startups, growing companies, firms pursuing acquisitions or exits, and voluntary,…
Financial Health
StrongStrong · 4% CAGR over 1y
Location
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Financial sub-scores
Computed from 3 filingsProvides chartered accountancy services including audit, company accounts preparation, tax compliance and planning, payroll and P11D processing, personal tax returns, company secretarial services,…
Serves start-ups, established businesses and individual taxpayers, predominantly in the Black Country and Worcestershire, needing accountancy, tax, payroll, audit and business planning support.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides chartered accountancy services for businesses and individuals, including accounts preparation, bookkeeping, payroll, tax planning and advice, audit services, company formation support, and…
Serves UK business owners and individuals, from small businesses to larger companies across multiple sectors, plus other accountancy practices and financial services firms needing specialist support.
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
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How reCAPTCHA usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. accounting companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of accounting companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
reCAPTCHA is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
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