How long it takes to get emergency tax back depends on which route fixes it. If your employer receives a corrected tax code from HMRC while you’re still working, the overpaid tax usually comes back through your wages within one or two pay cycles. If the tax year has already ended and HMRC handles the repayment, an online bank transfer typically reaches your account within five working days, while a cheque can take up to six weeks.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
Refund Timelines by Route
The single biggest factor is whether the fix happens during the tax year or after it ends on 5 April.
- Tax code corrected through your employer: refund arrives in your next regular pay packet once the new code reaches payroll, typically one to two pay cycles.
- P800 online bank transfer claim: five working days from the date you claim.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
- P800 automatic cheque (HMRC sends it without you claiming online): within 14 days of the date on your letter.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
- Cheque you request yourself through the online claim: up to six weeks.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
When HMRC gives you the choice, the online bank transfer is by far the quickest option. Choosing a cheque you have to wait for adds weeks to something that would otherwise clear in less than a working week.
Getting Your Code Corrected Mid-Year
If you’re still on an emergency code and the tax year hasn’t ended, the fastest way to trigger a refund is to get the code fixed now so it comes back through payroll. HMRC’s personal tax account and the HMRC app both let you check your current tax code, review the estimated income HMRC holds for you, and update your employment details.2GOV.UK. Personal Tax Account3GOV.UK. Download the HMRC App4GOV.UK. Check Your Income Tax for the Current Year Correcting an inflated income estimate or an out-of-date employer usually prompts HMRC to recalculate your code automatically.
You’ll need a Government Gateway login, and HMRC may ask you to verify your identity with photo ID the first time. One limitation: if you pay income tax only through Self Assessment, the online service to check your current year’s tax won’t be available to you, and you’ll need to phone instead.4GOV.UK. Check Your Income Tax for the Current Year
The income tax helpline is 0300 200 3300, or +44 135 535 9022 from outside the UK, open Monday to Friday, 8am to 6pm.5GOV.UK. Income Tax: Enquiries Have your National Insurance number ready and keep your latest payslip in front of you. Security questions draw on details in your personal tax account, so an out-of-date address can be enough to fail the identity check.
Once HMRC issues the new code, your employer applies it in the next pay run. Because a corrected code is cumulative, payroll recalculates from the start of the tax year and the overpaid tax appears on your next payslip, sometimes as a negative tax figure or a tax refund line. Nothing else is needed from you.
Claiming After the Tax Year Ends
If 5 April has already passed without your code being fixed, the process shifts to HMRC. After each tax year, HMRC reviews PAYE records and sends a P800 tax calculation letter to anyone who has paid too much or too little.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
If the P800 says you can claim online, you can pick a bank transfer (five working days) or a posted cheque (up to six weeks). If you don’t claim online within 21 days, HMRC posts a cheque automatically, and that cheque arrives within 14 days of the date on the letter. If your P800 tells you a cheque is on the way rather than offering the online option, no action is needed on your side.1GOV.UK. Tax Overpayments and Underpayments – If You’re Due a Refund
You don’t have to wait for the letter to arrive. You can start the process yourself by contacting HMRC or using the refund checker on GOV.UK, and the HMRC app also lets you claim a refund if you’ve overpaid.6GOV.UK. Check How to Claim a Tax Refund3GOV.UK. Download the HMRC App
What Can Slow Things Down
The timelines above assume a straightforward case. Delays are more likely in April and May, when HMRC processes the bulk of year-end reconciliations and claim volumes spike. Cases involving several employers in one year, a mid-year job change, or mismatches between your records and what your employer submitted also take longer to verify.
If your refund feels overdue, check your personal tax account or the HMRC app for status updates rather than waiting on the post.3GOV.UK. Download the HMRC App Before you contact HMRC about anything tax-related, have your National Insurance number to hand; it links your employment records, tax codes, and refund history, and every conversation runs faster with it.7GOV.UK. Your National Insurance Number If you’ve mislaid it, you can find it through your personal tax account, the HMRC app, or on old payslips and tax letters.8GOV.UK. Find Your National Insurance Number
Handing your new employer parts 2 and 3 of your P45 from your last job, or the P60 if the tax year has ended, gives them the figures they need to apply the right code from your first payday.9GOV.UK. Your P45, P60 and P11D Missing paperwork is one of the most common reasons a refund gets stuck.
The Four-Year Deadline
You have four years from the end of the tax year in which you overpaid to claim the money back. After that, the tax year is closed and any refund you were owed is gone. If you overpaid in 2022/23 (the year that ended on 5 April 2023), your deadline is 5 April 2027. For 2025/26, the deadline is 5 April 2030.
This is worth checking if you’ve changed jobs several times without paying much attention to your tax codes. Overpayments can sit across more than one year, and unclaimed refunds from 2021/22 and earlier have already lapsed. Your personal tax account holds your employment history going back five years and is the quickest place to spot old codes that look wrong.
Avoiding a Repeat
The reliable way to keep off an emergency code in the first place is to give your new employer a P45 from your previous job on or before your first payday. If you don’t have one, your new employer will provide a starter checklist to complete instead, and the answers on it drive the tax code they apply.10GOV.UK. Starter Checklist if You’re Starting a New Job The question that trips most people up asks whether this is your first job since 6 April, your only job, or one of several; picking the wrong option is the most common route onto an emergency code.
HMRC recommends checking your tax code every January and whenever your circumstances change: a new job, a pension starting, or a source of income ending.4GOV.UK. Check Your Income Tax for the Current Year A five-minute look at your personal tax account can save months of chasing a refund later.