Tax Advisory Companies in Cardiff: 127 Active Firms (2026)
Tax advisory companies in Cardiff help businesses and individuals manage compliance, planning and HMRC interactions across the city region.
Buying centres tend to sit with finance directors, owner-managers, payroll leads and private-client advisers rather than with procurement teams. Cardiff tax advisory work is usually relationship-led, with recurring compliance retainers sitting alongside project-based advice on VAT, employment tax, transactions and HMRC enquiries. The customer base is mainly local employers, owner-managed businesses, growth companies and high-net-worth individuals across the city region. Engagements are typically advisory-service mandates rather than software or outsourced back-office contracts, with value coming from specialist judgement, deadline management and familiarity with HMRC processes.
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Cardiff has 127 actively trading tax advisory companies, giving the city a fairly contained professional-services cohort rather than a broad national outsourcing market. Reported employment totals 537 people, with 83 of 83 employment-reporting firms showing headcount. That footprint fits a market built around small advisory teams serving recurring client relationships, rather than high-volume processing operations. The local base is likely to be shaped by Cardiff’s concentration of owner-managed businesses, professional partnerships and regional employers that need regular compliance support and episodic advice around transactions, VAT and payroll-related tax issues.
HMRC sits at the centre of the operating context, particularly for enquiry work, filing deadlines, VAT treatment and employment tax positions. Market structure is shaped by trust and professional liability: clients tend to value continuity, judgement and defensible advice over low-cost commoditised filing alone. Cardiff advisers also sit between private-client and business-tax demand, because owner-managed businesses often bring corporate, personal and employment-tax questions into the same relationship. That creates room for specialist boutiques, but it also keeps pressure on documentation, internal review and clear separation between planning advice and aggressive tax positions.
Demand appears likely to remain tied to recurring compliance cycles, but fee pressure tends to rise where work can be standardised or handled through accountancy workflows. Advisory practices with deeper exposure to VAT, employment tax, transactions and HMRC enquiries may be better placed than generalist firms that rely mainly on routine filings. The Cardiff cohort looks more like a specialist local services market than a scale-up pool, so consolidation may come through practice sales, partner succession and accountancy group bolt-ons rather than venture-backed expansion. Regulatory scrutiny should keep demand for careful, well-documented advice relatively durable.
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
Active director count is the full Companies House board, so it can be higher than the number of names listed — we leave out nominee and formation-agent directors, who aren’t worth contacting. It’s blank for the small number of companies whose officers we haven’t fetched yet.
You’re charged per business, not per row. Where a business trades through several registered companies you get every one, and the Group Primary column marks one row per business — filter to those and the count matches your invoice. Rows sharing a website are not automatically one business: franchises and multi-site operators each count separately, and where names don’t prove a relationship we count them apart rather than guess.
127
Active firms
2026
14
Recent incorporations
Since 2022
0
Above £5M
Reported revenue threshold
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Key facts
11% of the cohort was incorporated since 2022 (14 firms), so a sizeable share is in its first few filing cycles.
Demand is tied to recurring compliance cycles, tax planning and HMRC correspondence rather than one-off project work.
Cardiff practices tend to serve owner-managed businesses, individuals and local commercial clients across the city region.
Compliance-led advisers and planning-focused practices appear side by side, with positioning shaped by client type and tax complexity.
Top Cardiff Tax Advisory companies
Financial sub-scores
Computed from 4 filingsProvides chartered accountancy and tax advisory services for individuals and businesses. Services include annual accounts, bookkeeping, payroll, VAT returns, audit, corporate finance, tax planning,…
Serves private individuals, sole traders, start-ups, small businesses and larger companies, mainly in Cardiff and South Wales, with clients across sectors including those with crypto tax needs.
Financial Health
StableStable · Hiring · 4% CAGR over 3y
Location
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- ADV Accountancy15887508
- Advantage Accountancy & Advisory10708266
Financial sub-scores
Computed from 3 filingsProvides accountancy and business advisory services including financial accounts preparation, audit, tax compliance and planning, VAT, payroll, and company secretarial support. Also advises on…
Serves small and growing businesses in Cardiff and nearby South Wales towns, including organisations needing accountancy, audit, tax, payroll, corporate finance and business advisory support.
Financial Health
StableStable · -11% CAGR over 2y
Location
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Provides accounting, audit and tax advisory services for businesses and individuals. Services include accounts preparation, tax compliance and planning, payroll, bookkeeping, VAT, company secretarial…
Serves owner-managed businesses, professional practices and individuals, including solicitors, barristers, doctors, dentists, property investors, construction and property development firms, and…
Financial Health
N/AN/A
Location
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Financial sub-scores
Computed from 4 filingsProvides chartered accountancy services including preparation of accounts, tax planning and compliance, payroll administration, audit, and business advisory support for businesses and individuals,…
Serves small businesses, start-ups, employers and individuals needing accountancy and tax support, with an emphasis on clients in Cardiff, Caerphilly and nearby areas.
Financial Health
HealthyHealthy · 0% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides accounting, auditing and tax advisory services for businesses and individuals, including corporate and personal tax planning, VAT advice, payroll, outsourced accounting, wealth planning, and…
Serves owner-managed businesses, entrepreneurs and private clients, alongside not-for-profit, voluntary, community and social enterprise organisations.
Financial Health
HealthyHealthy · 4% CAGR over 2y
Location
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Computed from 3 filingsProvides accountancy and business advisory services including audit, annual accounts preparation, tax compliance and planning, management accounts, payroll and auto‑enrolment bureau services. Also…
Serves businesses, charities, public-sector organisations and personal clients, including corporate clients, new start businesses and individuals in South Wales.
Financial Health
StableStable · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides accounting, auditing, payroll, and tax advisory services for businesses and individuals. Offers business advisory, VAT support, cloud accounting software solutions, estate planning, probate…
Serves B2B and private clients: ambitious startups, established and growing SMEs in property, construction, manufacturing, engineering, digital/tech, SaaS and block management, plus property…
Financial Health
DistressedDistressed
Location
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Financial sub-scores
Computed from 5 filingsProvides accountancy and business advisory services, including bookkeeping, accounts preparation, tax planning, VAT, payroll, corporate finance, and company secretarial support. Advises individuals…
Serves owner-managed businesses, start-ups and medical sector clients in Wales, alongside individuals needing personal tax, estate planning, retirement and self-assessment support.
Financial Health
StableStable · -5% CAGR over 4y
Location
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Computed from 3 filingsProvides accountancy, audit, and tax planning services for businesses and individuals. Offers financial reporting, management accounts, compliance support, and business advisory services, including…
Serves businesses and individuals in Cardiff and South Wales, from sole traders and owner-managed SMEs to larger companies, plus personal tax clients.
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 3 filingsProvides accountancy and business advisory services including audit and annual accounts, tax compliance and planning, management accounts, payroll and auto‑enrolment, accounting software support, and…
Serves businesses and individual clients, including corporate organisations, charities and public sector bodies. Targets new start businesses and legal-sector clients, and also supports personal tax…
Financial Health
StableStable · -2% CAGR over 2y
Location
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Computed from 5 filingsProvides chartered accountancy and audit services for businesses and organisations, including financial accounts preparation, assurance, tax planning and advisory, VAT, payroll and PAYE, management…
Serves privately owned and owner-managed businesses, other organisations, and clients requiring probate and estate administration support.
Financial Health
WeakWeak · -3% CAGR over 5y
Location
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Financial sub-scores
Computed from 5 filingsProvides accountancy, bookkeeping and tax advisory services for individuals and businesses. Assists with statutory accounts, compliance, management accounts, tax planning, and HMRC tax…
Serves individuals and businesses, with a focus on small businesses, entrepreneurs, property investors and media personalities seeking accountancy, tax and advisory support.
Financial Health
StableStable · -9% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides accounting, tax compliance and planning, and financial management services for businesses. Offers digital accounting systems, outsourced finance teams, company secretarial support, and…
Serves businesses, especially SMEs and growth companies needing accounting, tax and financial management support. Targets firms involved in fundraising, mergers, acquisitions, business sales and…
Financial Health
WeakWeak · -2% CAGR over 4y
Location
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Computed from 3 filingsProvides chartered accounting and tax advisory services to businesses and individuals, including accounts preparation, tax returns, tax planning, investigations support, company secretarial services,…
Serves individuals and businesses, especially SMEs, charities and academies, construction and property firms, entertainment, media and sports clients, healthcare providers, retailers, and wealth…
Financial Health
WeakWeak · Hiring · 22% CAGR over 2y
Location
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Computed from 3 filingsProvides chartered accountancy services including preparation of accounts, tax returns and tax planning for individuals, tradespeople and companies. Offers business advisory, financial reporting, and…
Serves a mix of B2B and personal clients, including individuals, tradespeople and companies, with emphasis on businesses and taxpayers in Cardiff and South Wales.
Financial Health
StableStable · 4% CAGR over 2y
Location
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Computed from 5 filingsProvides accounting and taxation services for businesses and individuals, including preparation of business accounts, personal and self‑assessment tax returns, and support with HMRC enquiries and…
Serves small and medium-sized businesses, limited companies, and individuals needing personal tax support, primarily in South Wales and across the UK.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 2 filingsProvides audit and assurance, accounting, tax compliance, and business advisory services. Offers corporate finance, restructuring, payroll, outsourced accounting, and wealth and tax planning services…
Serves growth-focused UK businesses and organisations across agribusiness, automotive, real estate, education, energy, financial services, healthcare, manufacturing, not-for-profit, retail,…
Financial Health
HealthyHealthy · -5% CAGR over 1y
Location
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Computed from 2 filingsProvides accounting and financial advisory services for businesses and individuals, including bookkeeping, management accounts, payroll, VAT, tax returns, corporation tax planning, company…
Serves small businesses, sole traders, partnerships, limited companies, charities, start-ups and individual taxpayers, primarily clients seeking ongoing financial support in South Wales.
Financial Health
StrongStrong · Hiring · 93% CAGR over 1y
Location
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Computed from 5 filingsProvides accounting and taxation services for businesses, including preparation of annual accounts, VAT returns, bookkeeping, and payroll. Also offers tax planning, business start‑up advice, business…
Serves small businesses, start-ups and growing companies, primarily owner-managed businesses seeking ongoing accountancy and business advisory support.
Financial Health
StableStable · -7% CAGR over 4y
Location
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Computed from 3 filingsProvides accountancy and tax services for businesses and individuals, including bookkeeping, self‑assessment tax returns, VAT returns, payroll processing, and financial advisory support, and assists…
Serves businesses, sole traders and individuals seeking accountancy and tax support, particularly clients in the Cardiff and Bristol areas.
Financial Health
StableStable · 0% CAGR over 2y
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Computed from 5 filingsProvides accountancy and tax services for individuals and businesses, including preparation of financial accounts, self‑assessment tax returns, VAT returns, payroll processing, bookkeeping, and…
Serves individuals, landlords, sole traders, partnerships and limited companies needing accountancy and tax support, with a focus on clients across South Wales and the South West of England.
Financial Health
DistressedDistressed · 0% CAGR over 4y
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Computed from 5 filingsProvides accounting, tax planning and compliance services to individuals and businesses, including bookkeeping, financial reporting, payroll, cloud accounting using Xero, and advisory support on…
Serves individuals and businesses, from small local firms to large national and international companies, with emphasis on business owners using cloud accounting.
Financial Health
StableStable · Hiring · 16% CAGR over 4y
Location
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Computed from 4 filingsFinancial Health
HealthyHealthy · Hiring · 26% CAGR over 3y
Location
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Computed from 5 filingsProvides accountancy services for sole traders, partnerships, and limited companies, including year-end accounts, bookkeeping, payroll, VAT returns, corporation tax and self-assessment filings. Also…
Serves UK sole traders, self-employed individuals, partnerships and small limited companies seeking local accountancy and tax support, including people starting, running, growing, buying or selling a…
Financial Health
WeakWeak · Hiring · 19% CAGR over 4y
Location
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Computed from 2 filingsFinancial Health
StableStable · 0% CAGR over 1y
Location
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Computed from 5 filingsFinancial Health
WeakWeak
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Computed from 5 filingsFinancial Health
WeakWeak · 0% CAGR over 4y
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Computed from 5 filingsFinancial Health
WeakWeak · Hiring · 19% CAGR over 4y
Location
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Computed from 5 filingsFinancial Health
DistressedDistressed · -71% CAGR over 4y
Location
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Computed from 5 filingsFinancial Health
StableStable · 0% CAGR over 4y
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Financial sub-scores
Computed from 2 filingsFinancial Health
WeakWeak
Location
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Financial sub-scores
Computed from 5 filingsFinancial Health
DistressedDistressed
Location
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Financial sub-scores
Computed from 5 filingsFinancial Health
StableStable · -7% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
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Financial sub-scores
Computed from 2 filingsFinancial Health
StableStable
Location
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Computed from 5 filingsFinancial Health
HealthyHealthy · 0% CAGR over 4y
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Financial sub-scores
Computed from 5 filingsFinancial Health
StrongStrong
Location
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Computed from 2 filingsFinancial Health
StrongStrong · Hiring · 100% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsFinancial Health
StableStable
Location
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Computed from 5 filingsFinancial Health
WeakWeak · -65% CAGR over 4y
Location
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Computed from 5 filingsFinancial Health
DistressedDistressed · -68% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides chartered accountancy and business advisory services to businesses and individuals. Services include preparation of annual accounts, tax returns, VAT and payroll, corporation and directors’…
Serves owner-managed businesses, start-ups, contractors, company directors and individual taxpayers, with an emphasis on clients in Cardiff and Merthyr Tydfil.
Financial Health
HealthyHealthy · Hiring · 12% CAGR over 5y
Location
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Computed from 5 filingsProvides accounting, tax advisory, audit, payroll, VAT, company secretarial and business advisory services. Supports business startups, accounting software implementation, and financial reporting for…
Serves business owners and organisations across the UK, with an emphasis on Wales, including construction, manufacturing, medical, non-profit, private care, professional services, property, retail…
Financial Health
StableStable · 2% CAGR over 4y
Location
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- Ellis Lloyd Jones12814353
Financial sub-scores
Computed from 5 filingsProvides chartered accountancy services for businesses and individuals, including audit, financial accounting, bookkeeping, payroll processing, VAT and business tax compliance, self‑assessment…
Serves businesses, charities, solicitors and private individuals needing accountancy and personal tax support, primarily in Newport, South Wales and along the M4 corridor including Cardiff and…
Financial Health
StableStable · -2% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and business advisory services including bookkeeping, tax planning and compliance, VAT returns, payroll bureau, financial planning, company formation and structuring, and will…
Serves small and medium-sized businesses, owner-managers and entrepreneurs, with some services aimed at individuals seeking personal tax, will and inheritance tax support.
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides accountancy and financial advisory services to businesses and individuals, including bookkeeping, business accounting, company secretarial support, corporate tax and VAT planning, payroll…
Sells to businesses of all sizes, from start-ups and small companies to medium and large enterprises, and also to individual clients seeking personal and family financial advice, tax planning and…
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 4y
Location
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Computed from 5 filingsProvides accounting and tax services for individuals and businesses, including bookkeeping, payroll management, VAT returns, self‑assessment and corporation tax planning, CIS administration,…
Serves sole traders, partnerships, limited companies and individuals across South Wales, including small and medium businesses, construction firms, and employers with payroll and compliance needs.
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides chartered accountancy services including accounts preparation, audit, bookkeeping, tax planning and compliance, payroll, VAT outsourcing, and business consulting. Also assists with company…
Serves individuals and businesses in South Wales, including startups, personal service companies, contractors, landlords, charities, construction firms, medical practices, solicitors, motor trade…
Financial Health
WeakWeak · Hiring · 2% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and financial advisory services including bookkeeping, tax, R&D claims, forecasting and outsourced financial director support. Also advises on commercial and corporate finance…
Targets business owners, entrepreneurs and finance leaders at UK businesses of all sizes, from sole traders and start-ups to scale-ups, SMEs, large and multinational organisations across industries.
Financial Health
HealthyHealthy · Hiring · 37% CAGR over 4y
Location
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Computed from 5 filingsProvides accountancy and business advisory services including preparation of annual accounts, payroll, VAT and management accounts, tax planning, corporate finance, external audit and risk assurance,…
Sells to businesses, charities and unincorporated organisations needing accountancy and business advisory support, including clients in manufacturing, professional practices, property and…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
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How Cardiff Tax Advisory companies work and how to sell to them
What they do
Cardiff tax advisers generally monetise expertise rather than volume processing. Revenue tends to mix annual compliance retainers, fixed-fee filing work, hourly or day-rate enquiry support, and project fees for VAT, employment tax, restructuring and transaction advice. Smaller practices often rely on partner-led relationships and repeat mandates, while larger local teams may package tax advice with wider accountancy or private-client services. The commercial product is usually a file of calculations, filings, correspondence, risk notes and client-ready advice, backed by professional judgement and deadline ownership.
Who they sell to
Typical buyers are owner-managers, finance directors, payroll leads, private-client advisers and, in larger employers, CFOs or heads of finance. Contracting is usually direct and relationship-led: referrals from accountants, solicitors and existing clients matter more than formal procurement. Compliance work can convert quickly when a filing deadline or HMRC letter creates urgency, while transaction, VAT or employment-tax mandates tend to involve more scoping, conflict checks and fee discussion. Formal RFPs appear more often where a larger employer is reviewing advisers or consolidating professional-services spend.
What they buy
Most Cardiff tax advisory firms tend to spend on tools and services that protect fee-earner time, reduce file risk and keep client work moving through deadlines. Relevant categories include practice management software, workflow and deadline tracking, secure document exchange, e-signature, CRM, billing, time recording, knowledge management, cyber security, cloud hosting, analytics and client onboarding tools. They may also buy professional indemnity support, specialist tax training, recruitment services, outsourced bookkeeping or payroll capacity, and marketing support aimed at referral networks rather than broad consumer acquisition.
Why and how to sell to them
Buying interest tends to rise when a practice adds partners, takes on a new service line, inherits a block of clients, faces partner succession, or sees more HMRC enquiry work than its current processes can absorb. Fee pressure on routine compliance also creates interest in workflow, automation, clearer review trails and better client chasing. Outbound messaging is more credible when it speaks to margin protection, deadline control, evidence quality and professional risk, rather than vague growth claims. Sellers should expect cautious evaluation and a preference for proof that fits small advisory 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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