You don’t need a company to claim car finance compensation. Complaining to your lender is free. The tax rebate on the compensation interest is a separate claim to HMRC, and it’s the part where many people choose a specialist, because it depends on tax-year checks and allowance calculations that are easy to get wrong. Which route suits you depends on your circumstances.
Update, 3 October 2026: Since this article was first published, the FCA has confirmed its motor finance compensation scheme (30 March 2026). Parts of it were suspended by the Upper Tribunal on 2 July 2026 while legal challenges are heard. The FCA still advises people with concerns to complain to their lender for free, and says payments are expected to begin in 2027 if the scheme is upheld (FCA).
Two separate claims
It helps to see this as two different things.
- The compensation. This comes from your lender, under the FCA’s scheme or through a complaint. Our article on who is eligible for car finance compensation explains the rules. It is a refund of money you overpaid, plus interest.
- The tax rebate. When the lender pays you, it deducts basic-rate income tax (22% from 6 April 2027) from the interest part. Depending on your income, HMRC may owe you some or all of that back.
You can handle each one differently. Some people deal with the compensation themselves and use a specialist for the tax.
Claiming compensation yourself
The FCA says complaining to your lender is free, and that you don’t need a claims management company or a law firm to take part in its scheme (FCA). The FCA’s page links to each lender’s contact details and offers template letters.
If you’re unhappy with your lender’s answer, you can go to the Financial Ombudsman Service. Its service is free, and it says you don’t need to pay anyone to represent you (Financial Ombudsman Service).
What it takes from you:
- working out which lender funded each car (our guide on finding your car finance lender can help)
- writing to each lender and keeping copies
- checking the lender’s offer and responding within the deadline it gives you
- watching for scam messages pretending to be lenders, which the FCA warns about
What the tax rebate involves
The tax rebate is claimed from HMRC, usually on form R40, or through a tax return if you’re registered for Self Assessment. You can submit an R40 to HMRC yourself. The work is less about the form and more about getting the tax position right.
- Tax-year checks. HMRC looks at the tax year the interest was paid, not when you had the car. Each year needs its own claim.
- Allowance calculations. Whether you’re owed anything depends on your Personal Allowance, the starting rate for savings (up to £5,000 for people on low incomes) and your Personal Savings Allowance (£1,000 basic rate, £500 higher rate) (GOV.UK). Other savings interest in the same year counts too.
- Evidence. You need the lender’s figures for the gross interest, tax deducted and net interest. See our checklist of documents you need for a car finance tax rebate.
- HMRC queries. HMRC may ask for more information before it repays.
- Multiple payouts. If you had several agreements, payments may land in different tax years, each with a different answer. Our guide to multiple payouts explains why.
Why many people use a specialist for the tax
The amount owed is set by the tax rules, but working it out takes time and care. People often use a specialist when they don’t want to piece together their income for past years, when payouts are spread over more than one tax year, or when they’re dealing with the affairs of someone who has died.
When you use Tax Repayments, we check whether you’re likely to be owed anything, work out the right tax year or years, prepare and submit the R40 as your agent, deal with any HMRC queries and pay you the balance after our fees. Our how it works page sets this out.
What to check before using any company
Companies charge a fee for this work. You can see how ours works on our fees page.
Before you sign up with anyone:
- read how the fee is worked out and when it is charged
- check whether you’ll owe anything if you cancel. The FCA says any cancellation fees a claims firm asks for must be reasonable and reflect the work done (FCA)
- for tax refunds, know that you can cancel an agent’s authority to receive your repayment at any time (House of Commons Library)
Using a company doesn’t get you more compensation or a bigger tax refund. What you’re paying for is the time, the checks and the follow-up.
Your next step
Use our calculator to estimate how much tax on your compensation could be repaid.