Research
Research on UK accountancy firms
We study the UK accountancy market using public records. Each page says what was counted, when, and what the figures cannot tell you.
- Register dataRead
Who owns UK accountancy firms
Individuals, holding companies and groups, from Companies House ownership records.
- Register dataRead
How big UK accountancy firms are
Staff numbers from filed accounts, in four size bands.
- Register dataRead
How old UK accountancy firms are
Company age, and why it is not the same as practice age.
- HMRC dataRead
Making Tax Digital: who it affects
How many sole traders and landlords each wave reaches, from HMRC data.
- Register dataRead
When are UK company accounts due?
A filing calendar: accounts and confirmation statements due each month, and year ends by sector.
- Register dataRead
Do accountancy firms file on time?
Their own overdue filings and lender charges, compared with all UK companies.
- Published pricesRead
Online fixed-fee accountants compared
Published starting prices on firms' own websites, checked 12 October 2026.
- MethodRead
How our research works
Sources, definitions, counting rules and limits, in one place.
- Register dataRead
Accountancy firms by area
Ten area pages, from Greater London to Glasgow and Cardiff.
"Register data" means the figures come from public registers and have not been checked with each firm. All counts are registered companies, not practices. One practice can run several companies.