If HMRC’s records show you paid more income tax through PAYE than you owed, you can get a PAYE tax refund either automatically through a P800 tax calculation letter after the tax year ends, or by claiming through your personal tax account. The fastest route pays into your bank within five working days of an online claim. You have four years from the end of the relevant tax year to claim, and specific forms exist for pension withdrawals and for leaving the UK.
Why You Might Be Owed Money
The most common trigger is an emergency tax code. When you start a job without handing your new employer a P45, HMRC often assigns a code such as 1257L W1 or 1257L M1.1GOV.UK. Tax Codes: Emergency Tax Codes These non-cumulative codes tax each pay period in isolation and ignore any unused personal allowance from earlier months, so the deduction is almost always too high.2GOV.UK. Understanding Your Employees’ Tax Codes
Leaving a job partway through the year is another reliable cause. Your £12,570 personal allowance covers the full tax year from 6 April to 5 April.3GOV.UK. Income Tax Personal Allowance and the Basic Rate Limit From 6 April 2026 to 5 April 2028 If you stop working in October, your employer likely deducted tax as though you would earn for the full twelve months, leaving part of your allowance unused.4GOV.UK. Income Tax Rates and Personal Allowances
Two jobs can produce the same effect. HMRC should split your allowance across your employments, but if a second job gets a BR code taxing everything at basic rate while your main job hasn’t actually used the full allowance, you’ll have overpaid by year-end. Changes to taxable benefits like a company car or medical insurance can also lag in your tax code, so you get taxed on benefits you no longer receive.
Pension lump sums are worth flagging separately. Providers routinely apply an emergency code to withdrawals because they don’t know your other income for the year, and a single payment can be dramatically overtaxed.
The P800 Tax Calculation Letter
After each tax year ends on 5 April, HMRC compares the income your employers reported with the tax you actually paid. If the numbers don’t match, HMRC posts a P800 tax calculation letter, usually between June and November, saying either that you overpaid and are owed money, or that you underpaid and owe more.
There are two versions of the refund letter, and how you claim depends on which you receive.
If your letter says you can claim online, sign in using the reference number on the letter and your National Insurance number, then choose a bank transfer or a cheque. A bank transfer clears within five working days. A cheque requested through the online system takes up to six weeks.5GOV.UK. Tax Overpayments and Underpayments – If Your Tax Calculation Letter (P800) Says You’re Due a Refund
If your letter says a cheque will be sent automatically, you don’t need to do anything. HMRC posts it, and it should arrive within 14 days of the date on the letter.5GOV.UK. Tax Overpayments and Underpayments – If Your Tax Calculation Letter (P800) Says You’re Due a Refund
You can also claim through the HMRC app or your personal tax account if you have a UK bank account.
Claiming Without a P800
If you never receive a P800 but think you’ve overpaid, check your personal tax account. The “Check your Income Tax” section shows the earnings and tax your employers reported for each year.6GOV.UK. Personal Tax Account: Sign In or Set Up7GOV.UK. HMRC Online Services: Sign In or Set Up an Account8GOV.UK. Using Your GOV.UK One Login
Two documents make the check straightforward. Your P60, the end-of-year certificate your employer must give you by 31 May, summarises your total pay and tax for the year just ended.9GOV.UK. Your P45, P60 and P11D Form If you changed jobs, your previous employer should have given you a P45 showing your earnings and tax up to your leaving date.10GOV.UK. Your P45, P60 and P11D Form A lost P60 can be reissued by your employer. A P45 cannot, but your former employer can supply a statement of earnings on company letterhead. If the employer has closed, HMRC’s own records include the pay and tax figures reported through payroll.
Compare your total income for the year against £12,570. If your income was below the allowance and any tax was deducted, you’re almost certainly owed money back.
Pension Withdrawals
You don’t have to wait for HMRC’s end-of-year reconciliation to reclaim tax overpaid on a pension lump sum. Three forms cover the main situations:
- P53 if you’ve taken all of your pension as a cash lump sum through trivial commutation, or received a small pension as a lump sum.11GOV.UK. Claim a Tax Refund When You’ve Taken a Small Pension Lump Sum (P53)
- P53Z if you’ve flexibly accessed your pension and the pot is now empty, or you’ve received a serious ill health lump sum.11GOV.UK. Claim a Tax Refund When You’ve Taken a Small Pension Lump Sum (P53)
- P55 if you’ve flexibly accessed part of your pension but haven’t emptied the pot.
Without one of these forms, you’d have to wait for the automatic year-end correction.
Leaving the UK
If you’re leaving the UK permanently or for a full tax year, use form P85 to claim for the year you depart. Anyone who worked only part of the year before emigrating is unlikely to have used their full £12,570 personal allowance.4GOV.UK. Income Tax Rates and Personal Allowances HMRC recommends including a cover letter stating your arrival and departure dates and confirming that you are leaving permanently or indefinitely. Migrant workers who spent a short period in the UK are generally entitled to the full personal allowance against their UK earnings, so if total pay was below £12,570, all tax deducted is likely refundable.
How Far Back You Can Claim
You have four years from the end of the tax year in question to claim a PAYE refund. For the 2022–23 tax year, which ended 5 April 2023, the deadline is 5 April 2027. Once the window closes, older years are permanently out of reach. HMRC’s P800 process handles the most recent year automatically, but it doesn’t always pick up older discrepancies, especially where an employer’s payroll records were inaccurate at the time, so check your personal tax account for earlier years if you suspect a problem.
How Long the Refund Takes
Speed depends on the route. An online claim after a P800 pays within five working days.12GOV.UK. PAYE91037 – Reconcile Individual: Overpayments: Repayments by BACS Process A cheque requested online takes up to six weeks. A cheque HMRC sends automatically should arrive within 14 days of the date on the letter.5GOV.UK. Tax Overpayments and Underpayments – If Your Tax Calculation Letter (P800) Says You’re Due a Refund If a claim is taking longer, your personal tax account may show the status as pending while it’s being approved,13GOV.UK. Self Assessment Tax Returns – Claiming a Tax Refund and HMRC publishes current response times for income tax queries at GOV.UK.14GOV.UK. Check When You Can Expect a Reply From HMRC
HMRC also pays repayment interest while it holds your money. As of January 2026 the rate is 2.75%, calculated as the Bank of England base rate minus 1% with a floor of 0.5%.15GOV.UK. HMRC Interest Rates for Late and Early Payments Interest accrues from the date the tax was overpaid, not from the date you filed the claim, which matters when you’re backdating by several years.
Avoiding Refund Scams
HMRC will never email, text, call, or contact you through social media to offer a refund in exchange for personal or financial details. Any message claiming you’re owed money and asking you to click a link is almost certainly fraudulent, and scammers spoof genuine HMRC email addresses and phone numbers, so sender details aren’t proof of authenticity. Forward suspicious emails to phishing@hmrc.gov.uk and texts to 60599.16GOV.UK. Examples of Phishing Emails, Suspicious Phone Calls and Texts To check whether you’re genuinely owed anything, ignore the message and sign in to your personal tax account directly through GOV.UK.