Founder Tax Check
“Am I paying myself and running my company tax-efficiently?”
About eight questions. Where you might be overpaying, what could trip you up, and what's coming that's worth planning for.
About 2 minutesStart
Free checks for UK company owners
Are you overpaying HMRC without knowing it?
Free checks from a Chartered Accountant. Start with the two-minute tax check, or pick the one that matches your question.
See all the checksFree · See your result without signing up · 2 minutes
Built by Carr Accounting Studio — a London-based ICAEW accountancy firm
The checks
Pick the check that fits your question.
All free, all on screen straight away, none of them need an account.
Full checks · a few minutes, one joined-up result
Business Vehicle Check
“Is my company car or van set up the way I think it is?”
Maps how you own, fund and use a vehicle — or plan to — and gives one result across the whole setup: what deserves attention, what to gather, what to do next.
About 2 minutesStart
Quick tools · when you have one specific question
Business mileage calculator
“What can I claim for the miles I've driven?”
An indicative approved-mileage amount and, where it applies, the Income Tax relief in play.
Under a minuteOpen
Pickup van or car check
“Which rules is my double-cab pickup under, and when does that change?”
Which rules apply for the regime you ask about, and the date the treatment changes. It won't judge the vehicle itself — that part is yours.
Under a minuteOpen
What every check gives you
Clear enough to act on.
A straight answer
Where you stand, in plain English. Not a score you have to interpret.
What to do next
The specific things to gather, fix, or ask someone about.
What it's based on
The assumptions, caveats and statutory version behind every answer, shown on screen. You can see exactly what it rests on.
“Most founders have at least one thing worth fixing — and they're often overpaying (or underpaying!) a few hundred to a few thousand in tax a year.”
David Carr
Chartered Accountant (ACA, ICAEW)
Your data
You choose what to share. See your result without an account and nothing is saved. Ask us to email it, or create a free account, and we store your email and result so you can come back to them — you can delete them any time.
Nothing leaves your browser until you ask — when you email yourself the result, create an account, or book a call. That's your call, and you can delete what we've saved whenever you like.
Who's behind it
Built by Chartered Accountants — for founders.
FounderTax is made by Carr Accounting Studio, a London firm of Chartered Accountants (ICAEW). It uses the same checks we run with founder clients every day.
Every figure in your result is one we actually work from and sign off — not a rule of thumb from a blog. If something needs attention, you can book an obligation-free call with the firm that built it.
Visit Carr Accounting StudioDavid Carr
Chartered Accountant (ACA, ICAEW), founder of Carr Accounting Studio
“You build the business. We handle the finances.”
Not sure which one?
Start with the two-minute tax check.
It covers the whole setup and tells you which of the others are worth doing next. Your result's on screen straight away — email it to yourself if you'd like a copy, and book a call only if something needs a closer look.