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Tax Advisory Companies in London: 3,000+ Active Firms (2026)
Tax advisory companies in London advise organisations and individuals on tax planning, compliance, reporting and disputes across the capital.
Buying centres in this market tend to sit with finance directors, heads of tax, fund finance teams and private-client principals rather than with centralised procurement. Work is mainly business-to-business and advisory-led, but the client mix also includes family offices and high-net-worth individuals where personal, corporate and asset-holding structures overlap. Engagements usually take the form of recurring compliance retainers, project-based planning, transaction support, reporting-cycle work and HMRC enquiry response. The firms that fit this page are mid-sized professional-services practices, with enough specialist coverage to separate corporation tax, indirect tax, employment tax and private-client work.
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London has 3,089 actively trading tax advisory companies, making the capital a broad but fragmented market rather than a market dominated by revenue-scaled practices. Only 19 firms have reported turnover above £5M, while 476 were incorporated since 2022, so the cohort contains long-established advisers as well as a newer layer of small practices. Reported employment totals 1,721 people, with headcount disclosed for 118 of 118 firms (100%). That points to a visible payroll footprint, though much of the market still appears to sit below the scale implied by larger multidisciplinary advisory firms.
HMRC-facing work gives the market a practical regulatory cadence: enquiries, compliance cycles and reporting obligations create repeat contact between advisers, finance teams and private-client representatives. The service lines named for this cohort also imply different risk tolerances. Corporation tax and indirect tax advice tend to sit close to finance reporting; employment tax work touches payroll and reward decisions; private-client mandates can involve family office structures and personal tax positions. London’s mix of corporate clients, funds and high-net-worth individuals therefore favours firms able to coordinate technical advice with dispute support, rather than treating planning and compliance as separate silos.
The market appears likely to remain crowded at the smaller-practice end, with newer entrants competing on specialist advice, founder relationships and responsiveness around enquiry work. Revenue-scaled firms should have more room to deepen sector specialisms, but the gap between advisory boutiques and larger professional-services practices may keep consolidation selective rather than broad-based. Demand tends to follow tax complexity, transaction activity and scrutiny from HMRC, so growth is unlikely to be evenly distributed across the cohort. Firms with repeat compliance relationships appear better placed to convert advisory work than practices built only around episodic planning projects.
3,089
Active firms
2026
19
Above £5M
Reported revenue
476
New since 2022
Recent incorporations
Key facts
About 1% of the trading cohort reports turnover above £5M (19 of 3,089 firms) — the rest sits below that revenue band.
15% of the cohort was incorporated since 2022 (476 firms), so a sizeable share is in its first few filing cycles.
Tax advisory work in London spans planning, compliance, reporting and disputes for organisations and individuals.
Advice tends to sit close to finance, legal and governance decisions, especially where clients operate across multiple UK tax obligations.
Procurement often separates larger partnership-led mandates from smaller specialist work, particularly where buyers need issue-specific advice rather than recurring compliance support.
Top London Tax Advisory companies
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides international tax advisory, wealth structuring, and corporate and fiduciary services. Offers accountancy, tax compliance, trust and inheritance tax planning, and business advisory support…
Serves corporations, entrepreneurs, start-ups, family offices and private clients with international tax, wealth structuring, corporate and fiduciary advisory needs.
Financial Health
StrongStrong · Hiring · 12% CAGR over 4y
Location
BEAVIS MORGAN LLP
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides accountancy, audit, tax and business advisory services to companies and individuals. Services include corporate finance, restructuring, estate planning, bookkeeping, payroll, VAT returns,…
Serves businesses and individuals, including owner-managed firms, high-net-worth individuals, landed estates and organisations in capital markets, construction, hospitality, manufacturing, media,…
Financial Health
StableStable · -84% CAGR over 3y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides fiduciary, corporate and tax advisory services for private clients and businesses, including wealth structuring, family office support, trust and estate planning, accountancy, tax…
Serves high-net-worth private clients, families and family offices, as well as entrepreneurs, UK businesses, and individuals or businesses coming to or investing in the UK.
Financial Health
WeakWeak · -2% CAGR over 4y
Location
MOORE DOEREN MAYHEW LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides international tax advisory, compliance and business consulting services, supporting companies with cross‑border tax planning, regulatory compliance, and financial advisory through membership…
Targets a global client base of businesses and individuals, particularly organisations operating internationally, expanding abroad, or managing cross-border obligations across a diverse range of…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
Lisa's Accountancy Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy and tax advisory services, including corporation tax, personal tax planning, VAT, customs and excise duty, trusts and estates tax, and tax risk mitigation and dispute resolution,…
Serves businesses and private clients with UK tax affairs, including limited companies, partnerships, VAT-registered traders, trustees, estate representatives and individuals dealing with HMRC or…
Financial Health
HealthyHealthy · -11% CAGR over 2y
Location
Charter Tax (Accounting) Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsActs as a holding company for an accountancy and tax advisory business providing services including accounts preparation, corporate and personal tax compliance and consulting, bookkeeping, VAT…
Serves businesses, owner-managed ventures and finance teams, plus high-net-worth private clients in the UK and internationally, including non-doms, expats, family offices, trusts, estates, and UK…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 5y
Location
HW FISHER SERVICE LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides chartered accountancy services including audit, tax planning and compliance, corporate finance, and financial advisory. Advises businesses, entrepreneurs, and high‑net‑worth individuals…
Serves entrepreneurial SMEs, large corporates and high-net-worth individuals, with sector focus on property, hospitality, not-for-profit, sports, technology, financial services, media and…
Financial Health
HealthyHealthy · -1% CAGR over 5y
Location
PARKER LLOYD LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accountancy and financial advisory services including audit and accounts preparation, tax planning and tax investigations, corporate finance, mergers and acquisitions advisory, project and…
Serves B2B and individual clients, including large companies, SMEs, high-net-worth individuals, not-for-profit organisations, medical professionals and health services.
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
VERA GROUP HOLDING LTD
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides private wealth management and family office services, including international tax advisory, accounting and tax compliance, corporate and fiduciary services, trust and estate planning, fund…
Serves international corporations, entrepreneurs, institutional investors, non-profit organisations, expatriates, private individuals and families with complex cross-border wealth and compliance…
Financial Health
StrongStrong
Location
BAND ADVISORY GROUP LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accounting, audit, tax and business advisory services for individuals and companies in creative, media, sports and entertainment sectors. Services include business management, financial…
Serves entrepreneurial businesses and individuals in the creative industries, including architects, construction and built environment firms, creative agencies, music and entertainment professionals,…
Financial Health
StrongStrong · Hiring · 20% CAGR over 2y
Location
AKS ADVISERS LIMITED
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides accounting and tax advisory services including audit, compliance, mergers and acquisitions advice, business restructuring, pensions, and succession planning. Serves corporates, charities,…
Serves HNW individuals, entrepreneurs and start-ups, corporates, regulated organisations, and charity/non-profit clients, with emphasis on Westminster, Victoria and Chelsea.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
TAX ADVISORY PARTNERSHIP LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides infrastructure and administrative support services to affiliated tax advisory LLPs delivering UK and US tax compliance, planning and advisory services to private clients and businesses,…
Serves private clients with UK, US or international tax affairs, including expats, non-domiciled/non-resident individuals, US persons and family offices, plus businesses of all sizes with corporate,…
Financial Health
StableStable · -67% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accounting, audit, tax advisory and consulting services to businesses; personal and trust tax services to private clients; and insolvency and restructuring support, including specialist UK…
Serves UK businesses, private clients and trusts, distressed companies and stakeholders, plus international property investors and alternative investment funds with UK real estate interests.
Financial Health
StableStable
Location
Nyman Libson Paul LLP
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy, audit and assurance, taxation, and business advisory services. Advises companies and individuals on financial management, tax planning, R&D and creative industry tax relief, and…
Serves entrepreneurs, established businesses and private clients, with a focus on arts, media and entertainment, plus healthcare, hospitality, manufacturing, professional services, property, retail,…
Financial Health
HealthyHealthy · Profitable, Hiring · 8% CAGR over 2y
Location
SHELTONS MANAGEMENT LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides accounting, tax compliance and advisory services for international businesses. Offers cross‑border tax planning, tax treaty advice, corporate finance support, company secretarial services,…
Serves internationally operating businesses and foreign companies entering or operating in multiple jurisdictions, plus expats, large corporate tax teams and professional advisory firms with…
Financial Health
StableStable · Hiring · 19% CAGR over 3y
Location
Nordens Audit Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy, audit and tax services to businesses and individuals, including bookkeeping, payroll, VAT returns, tax planning and corporate audits. Also offers strategic advisory such as…
Serves ambitious business owners and SMEs through larger organisations, plus charities, FCA/SRA-regulated firms, property, construction, recruitment, professional services, technology, sports, media…
Financial Health
WeakWeak · 0% CAGR over 2y
Location
AAB UK Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides accounting and professional advisory services including audit and assurance, tax compliance and planning, payroll, corporate finance, restructuring and insolvency, HR consulting, and…
Serves businesses and organisations needing audit, tax, payroll, HR, restructuring and advisory support, plus private clients and high net worth individuals. Targets sectors including construction,…
Financial Health
WeakWeak · -8% CAGR over 4y
Location
ALLIOTTS LLP
Trajectory
5y · 2021–NowFinancial 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
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides accountancy, audit, payroll and tax advisory services to businesses and individuals. Offers tax planning, compliance and online accounting tools, and advises entrepreneurial and…
Serves entrepreneurial and fast-growing businesses, private clients and international clients, including boutique hoteliers, restaurateurs, medical professionals, property developers and high-end…
Financial Health
WeakWeak
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides tax, accounting, assurance and advisory services to individuals, startups and businesses. Services include statutory audits, corporate and international tax, VAT and R&D tax relief advice,…
Serves individuals, startups, small businesses and companies with cross-border UK-US operations, M&A activity, or audit, tax and reporting obligations.
Financial Health
HealthyHealthy · Hiring · 37% CAGR over 2y
Location
Georgiou & Prasanna LLP
Trajectory
4y · 2022–NowProvides accounting and tax advisory services for businesses and individuals, including bookkeeping, payroll, statutory and management accounts, corporate and personal tax, VAT returns, audit and…
Serves SMEs, start-ups and established businesses, including regulated firms, charities, pensions and LLPs, as well as entrepreneurs, landlords, overseas landlords and high-net-worth individuals…
Financial Health
Insufficient historyInsufficient history
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy and financial advisory services including preparation of accounts, audit and assurance, tax planning and compliance, outsourced business processes, and business advisory support…
Serves businesses across varied sectors, entrepreneurs and owners at stages such as UK market entry, start-up, growth, mergers, funding and exit, alongside private individuals seeking tax/accountancy…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
ZENITH ADVISORY SOLUTIONS LLP
Trajectory
3y · 2023–NowFinancial sub-scores
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
GOLDBLATTS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accounting, auditing and tax advisory services to businesses and individuals. Services include accounts production, bookkeeping, payroll, VAT, corporate finance, corporate and personal tax…
Serves owner-managed businesses, large UK corporations, partnerships and sole traders across London and the South East, spanning a wide range of sectors.
Financial Health
StableStable · -68% CAGR over 4y
Location
Carbon Accountancy Limited
Trajectory
5y · 2021–NowFinancial sub-scores
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
Trident Tax Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides tax advisory and tax investigation support to individuals, families, trustees and businesses. Services include private client tax planning, trust and estate structuring, cross‑border tax…
Serves high-net-worth individuals, families, entrepreneurs, trustees, family offices, professional advisers, real estate developers/investors, and international businesses with complex UK and…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 4y
Location
Eik Business Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides international and UK tax planning and advisory services, accounting and tax compliance, business valuation and deal support, and tax structuring using trusts and foundations for corporates…
Serves corporates, entrepreneurs and high-net-worth individuals, including people relocating to the UK or holding income/assets across multiple countries, plus business buyers/sellers and families…
Financial Health
StrongStrong · Hiring · 65% CAGR over 4y
Location
TELIC ADVISORY LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accounting and chartered tax advisory services to high‑net‑worth individuals, entrepreneurs, and family‑run businesses. Services include self‑assessment and tax compliance, tax planning,…
Serves a mix of B2C and B2B clients, especially high-net-worth individuals, family-managed businesses and entrepreneurs. Also targets expats, non-doms, UK-bound entrepreneurs, corporates entering the…
Financial Health
StrongStrong · Hiring · 78% CAGR over 4y
Location
AVENTUS PARTNERS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accounting, audit and assurance, tax advisory, and financial reporting services. Supports businesses with financial management, compliance with HMRC and statutory requirements, company…
Serves UK fast-growing businesses and global inbound companies setting up in the UK, across sectors such as retail and manufacturing, plus corporate and personal clients needing finance support.
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 2y
Location
Capitax Financial Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy, tax planning and compliance services for individuals and businesses. Offers financial reporting, business advisory, and support for international mobility and foreign investors,…
Serves UK and international private individuals, entrepreneurs, investors, families, partnerships and corporate clients, with sector focus including property, healthcare, construction, e-commerce,…
Financial Health
StableStable · -5% CAGR over 2y
Location
US Tax And Financial Services Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides US tax compliance, advisory and planning services for individuals, expatriates, trusts, funds and corporations. Services include US tax return preparation, US/UK cross‑border tax planning,…
Serves US-connected private individuals and expats, family offices, trusts and estates, funds, partnerships, investors and corporations with US interests in the UK, Switzerland and wider Europe.
Financial Health
StrongStrong · Growing, Hiring · 5% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides international tax advisory, wealth structuring, corporate and fiduciary services, and accountancy and tax compliance. Advises businesses, entrepreneurs and private clients on trust and…
Serves corporations, entrepreneurs, start-ups, family offices and private clients, including individuals with international tax, wealth structuring, fiduciary, inheritance and compliance needs.
Financial Health
DistressedDistressed
Location
ORCOM CIVVALS LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accounting, bookkeeping, audit and assurance, corporate and personal tax services, VAT and payroll support, company secretarial work, and business advisory services, including estate…
Serves growth-minded businesses and private clients, mainly in Central and West London, including construction, medical, veterinary, retail, energy, infrastructure, real estate, estate agency,…
Financial Health
StableStable · Hiring · 8% CAGR over 2y
Location
WellTax Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accounting, bookkeeping and financial reporting services, business and corporate tax planning and compliance, payroll and payment processing, company secretarial and governance support, and…
Serves businesses and private clients, including organisations in arts, charities, education, manufacturing, energy, financial services, hospitality, property, retail and technology, with UK/UAE or…
Financial Health
StrongStrong · Hiring · 19% CAGR over 4y
Location
COOPER YOUNG & PARTNERS LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides chartered accountancy and financial advisory services, including audit, accounts preparation, tax planning, restructuring and insolvency support, corporate finance and deal advisory, and…
Serves UK businesses, company directors, finance directors, accountants, partnerships, sole traders, individuals and creditors, with clients across leisure and hospitality, retail, construction and…
Financial Health
StrongStrong · Hiring · 12% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides US tax advisory, structuring, compliance and reporting services for funds, corporations and investors. Services include US tax return preparation, Schedule K‑1 reporting, international…
Serves B2B clients including investment funds, corporations, investors, and organisations doing business in the US, alongside accounting firms and global service providers supporting clients with US…
Financial Health
HealthyHealthy
Location
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides chartered accountancy and business advisory services, including tax planning, compliance, financial reporting, and support for business owners. Works with companies of various sizes on…
Serves business owners and businesses of all sizes, mainly in North and East London, East Hertfordshire and West Essex, with clients across the UK and mainland Europe.
Financial Health
WeakWeak · Hiring · 3% CAGR over 3y
Location
PEASEMOLDIA LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides chartered accountancy and audit services alongside business tax advice, corporate finance, VAT guidance, inheritance tax planning, litigation support, and personal tax planning for…
Serves businesses, private clients, professional practices, landed estates and not-for-profit organisations, including healthcare, hospitality, property, construction, rural businesses, charities and…
Financial Health
StrongStrong
Location
KNAV SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides tax, accounting, assurance and advisory services. Offers statutory audits, corporate and international tax advice, VAT and individual tax compliance, valuation services, financial reporting…
Serves individuals, startups and small businesses, as well as companies with cross-border UK-US operations, M&A activity, reporting, valuation or compliance needs.
Financial Health
StrongStrong · Hiring · 28% CAGR over 4y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides tax consultancy, accounting and financial advisory services. Activities include support for entrepreneurs, family office services and asset management, operating as a firm of chartered…
Serves entrepreneurs, family offices and asset management clients seeking tax, accounting and finance support.
Financial Health
HealthyHealthy · Hiring · 5% CAGR over 2y
Location
Fieldalter Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides indirect tax consultancy focused on VAT and customs duties, including compliance, risk management, advisory services, training, VAT determination, ERP tax engine implementation, and interim…
Serves businesses and not-for-profit organisations, including financial services, insurance, travel, property, food and drink, retail/ecommerce, global supply chain, and aviation/aerospace sectors.
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 4y
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accountancy and tax advisory services including audit and accounts preparation, bookkeeping and VAT, payroll processing, and company secretarial support. Also advises on corporate and…
Serves businesses and business owners needing accountancy, audit and tax advice, plus private clients needing personal, offshore and expatriate tax support. Has an established focus on media clients,…
Financial Health
HealthyHealthy · 0% CAGR over 4y
Location
Statura Ltd
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsProvides corporate, trust and private client services, including tax advisory, accounting, company administration and multi‑family office support. Advises businesses and high‑net‑worth individuals on…
Serves businesses, high-net-worth individuals and families with cross-border corporate, trust, wealth and private client affairs worldwide.
Financial Health
WeakWeak · 0% CAGR over 1y
Location
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides accounting and tax advisory services for individuals and businesses, including self‑assessment and corporation tax returns, VAT, payroll, bookkeeping, management and statutory accounts, tax…
Sells to UK individuals and SMEs needing tax and accounting support, including landlords, high-net-worth individuals, non-doms, expatriates, start-ups, family businesses, and sector clients such as…
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
CityCAs Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides chartered accountancy and tax advisory services for businesses and individuals, including auditing, corporate finance, management accounting, VAT and personal tax planning, and business…
Serves family-run businesses and entrepreneurs, with specialist focus on media businesses, law firms, doctors and dentists, plus clients seeking corporate finance, tax and accounting support.
Financial Health
WeakWeak · 0% CAGR over 2y
Location
Barnes & Scott Ltd
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides accounting, tax compliance and business advisory services for technology and fintech startups. Advises on R&D tax credits, EIS/SEIS and EMI schemes, financial reporting, cap table…
Serves B2B tech, fintech and digital start-ups, including London-based growth companies and global start-ups expanding into the UK, typically founders seeking finance and tax support from launch…
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 4y
Location
Trajectory
1y · 2025–NowProvides strategic tax advisory services for large organisations, including tax planning, negotiation with authorities, transaction support, economic analysis, and litigation support on complex UK…
Serves large organisations and top-tier corporates needing strategic tax advice, including UK and international businesses across industries, as well as sovereign entities referenced in its thought…
Financial Health
Insufficient historyInsufficient history
Location
Kkvms LLP
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy, tax advisory and corporate finance services for technology and IT companies. Advises on business strategy, investment and fundraising, HMRC tax matters including R&D tax…
Serves B2B clients in the global technology and IT sector, particularly growing companies, founders and business owners seeking long-term accountancy, tax, investment and corporate advisory support.
Financial Health
HealthyHealthy · 4% CAGR over 2y
Location
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides chartered accountancy and tax advisory services, including auditing, tax compliance and planning, business start-up advice, and financial consultancy. Supports businesses and individuals…
Serves UK businesses from small to large, including construction, real estate, financial services, not-for-profit and owner-managed companies, as well as individuals with assets and tax planning…
Financial Health
StableStable · 0% CAGR over 2y
Location
ADPL LLP
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides accountancy and tax advisory services for businesses and individuals, including bookkeeping, VAT returns, corporate finance, corporate and personal tax planning, self assessment, company…
Serves small businesses, start-ups and established companies, plus private individuals with tax and financial planning needs, primarily within its London client network.
Financial Health
StableStable · Hiring · 16% CAGR over 2y
Location
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How London Tax Advisory companies work and how to sell to them
What they do
London tax advisory firms make money from specialist advice rather than packaged software or physical goods. Revenue typically comes from annual compliance retainers, fixed-fee planning projects, hourly or day-rate advisory work, transaction support and dispute-related mandates. Deliverables are usually opinions, filings, working papers, calculations, disclosure packs and HMRC correspondence, with partner review carrying much of the margin risk. Pricing tends to depend on technical complexity, urgency, client risk and the seniority needed on the file. Repeat compliance relationships matter because they give firms a route into higher-value advisory work when clients restructure, acquire assets, raise finance or face scrutiny.
Who they sell to
Customers are usually owner-managed businesses, growth companies, mid-market corporates, funds, family offices and high-net-worth individuals with cross-border, investment or asset-holding complexity. The buyer is often a finance director, CFO, head of tax, fund finance lead, private-client principal or founder, with external lawyers and accountants influencing adviser selection. Smaller assignments can be referral-led and agreed after a scoping call, while larger corporate, fund or family office mandates may involve beauty parades, conflict checks and formal proposals. Sales cycles vary by trigger: deadline-driven compliance work can move quickly, whereas retainer switches and transaction support tend to require trust, senior access and evidence of technical fit.
What they buy
Most tax advisory practices tend to spend on tools and services that protect fee-earner time, reduce review risk and keep client files audit-ready. Common categories include practice management, time recording, billing, workflow, document management, secure client portals, CRM, tax research, knowledge management, e-signature, identity checks, AML processes, cyber security, cloud hosting and backup. They also buy professional indemnity cover, specialist legal support, accountancy support, recruitment, training, content marketing and website services. Firms with corporation tax, indirect tax, employment tax and private-client teams usually value systems that handle matter-level permissions, deadline tracking, evidence trails and partner sign-off without making fee earners rekey the same client information.
Why and how to sell to them
Tax advisory buyers tend to evaluate suppliers when workload, risk or client expectations outgrow informal processes. Common triggers include hiring fee earners, adding a new service line, taking on more fund or family office work, preparing for a reporting deadline, responding to HMRC enquiries, or replacing a retiring partner’s personal workflow with a shared system. Pain points are fairly practical: missed deadlines, unrecovered time, weak document control, slow onboarding, fragmented knowledge and difficulty proving who reviewed what. Outbound messages usually land better when they are tied to margin protection, confidentiality, technical quality control and easier collaboration between partners, managers and client teams.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. 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.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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