How do I claim a tax refund in the UK?

If you have overpaid PAYE tax, HMRC will usually send a P800 letter and issue a refund automatically. You can also claim by logging in to your Personal Tax Account at gov.uk, or by completing form R40 for savings income. Claims must be made within 4 years of the end of the tax year.

Can I claim tax back for working from home?

Yes. If your employer requires you to work from home, you can claim the HMRC flat rate of £6/week (£312/year) without receipts. Higher amounts require evidence of actual costs. Claims can be backdated up to 4 years.

Free to claim

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Q: How long does a tax refund take?

Online claims through the Personal Tax Account are usually processed within 5 working days and paid within 2 weeks. Postal claims and P800 cheques can take 6–8 weeks. Refunds claimed through Self Assessment are usually processed within 4 weeks of filing.

Millions of UK taxpayers overpay every year - through emergency tax codes, job changes, working from home or unclaimed expenses. The average PAYE refund is several hundred pounds. It takes minutes to check.

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Types of tax refund

Choose the situation that matches yours.

PAYE Tax Overpayment

Paid too much income tax through your employer? Common after an emergency tax code, a mid-year job change, or a period of unemployment.

Average refund: £300–£900

P800 Tax Calculation

Received a P800 letter from HMRC? It tells you whether you owe tax or are owed a refund. Here is what to do next.

Refund usually arrives in 5–14 days

Working From Home Relief

This relief was abolished from April 2026 — but you can still backdate claims for 2022/23 to 2025/26. Worth up to £140 per year. Claim before those years close.

Up to £560 backdated across 4 years

Work Expenses & Uniforms

Mileage, tools, professional subscriptions, uniforms and specialist clothing - if you paid for these yourself you can claim tax relief.

Depends on expenses paid

Marriage Allowance

Married or in a civil partnership? If one of you earns under £12,570 you can transfer £1,260 of allowance to your partner and save up to £252/year — backdatable 4 years.

Up to £1,260 in backdated refunds

Common reasons you might be owed money back

Any of these sound familiar?

You were put on an emergency tax code when starting a new job

You changed jobs mid-year and your cumulative tax position was miscalculated

You stopped working before the end of the tax year (redundancy, career break)

You worked less than a full year - for example you started your first job in December

You paid into a personal pension but did not claim the higher-rate relief

You worked from home but never claimed the flat-rate relief

You had a student loan deducted but were not earning above the threshold

Your tax code included benefits in kind that were overestimated

You are married or in a civil partnership but have never claimed Marriage Allowance

How long does a tax refund take?

P800 letter route

HMRC sends P800 letters between June and November each year. Once you accept online, the refund usually arrives in your bank within 5 working days. Cheques take 5 weeks.

Online claim via Personal Tax Account

If HMRC has not sent a P800 but you believe you overpaid, log in to your Personal Tax Account and claim directly. Processing takes 2–4 weeks, then 5 days to your bank.

Self Assessment refund

File your return, mark the refund for payment, and HMRC typically issues it within 5 working days of processing. Returns filed on paper take longer.

How far back can you claim?

You can claim a PAYE tax refund for the current tax year and the four previous tax years - meaning claims for as far back as 2021/22 are still valid until April 2026. Claims for 2022/23 are valid until April 2027, and so on.

For working from home relief, HMRC allows backdated claims through your Personal Tax Account. During 2020/21 and 2021/22 the relief was significantly enhanced - if you worked from home at all during COVID, you may still be able to claim for those years.

Work expenses (uniforms, professional fees, mileage) can similarly be claimed up to four years back. If you have never claimed and you have qualifying expenses, it is worth adding up several years at once.

Note: HMRC will not pay interest on refunds claimed late, but there is no penalty for claiming within the four-year window.

Start with our salary calculator

Enter your gross salary and compare what you should have paid in tax against your actual payslip or P60. Any difference could be refundable.

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TaxHelper provides information only - not regulated tax advice. For complex situations, consult a qualified tax adviser or contact HMRC on 0300 200 3300.

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