Claim Tax Refund: How to Recover Overpaid Tax from HMRC

When Can You Claim Tax Refund Money?

You can normally make a claim where tax has been deducted or paid but your final liability is lower than the amount collected. HMRC may identify some PAYE overpayments automatically, but you should not assume that every refund will be issued without action.

You may be able to claim tax refund UK payments relating to:

• Pay from a current or previous job
• An incorrect or emergency PAYE tax code
• Allowable employment expenses
• Working from home expenses where the statutory conditions are met
• Professional fees, uniforms, tools or qualifying business mileage
• Pension income or a flexible pension withdrawal
• A Self Assessment tax return
• A redundancy or termination payment
• Savings and investment income
• Foreign income taxed in the UK
• UK income received while living abroad
• UK income earned before leaving the country
• Tax deducted from certain annuity payments

A refund is not guaranteed simply because tax was deducted. HMRC will consider your total taxable income, allowances, reliefs and tax already paid for the relevant year.

Common Reasons Tax Is Overpaid

Incorrect PAYE Tax Code

An incorrect or temporary tax code can cause an employer or pension provider to deduct too much tax. This may happen after starting a new job, receiving employment benefits, having more than one source of PAYE income or when HMRC does not yet have complete information.

Starting or Leaving a Job

PAYE deductions are often calculated on the assumption that employment will continue for the full tax year. If you stop working, become unemployed, retire or return to full-time study, the tax already deducted may exceed your final annual liability.

Unclaimed Employment Expenses

Employees may be entitled to tax relief for costs they had to pay personally to perform their job. Examples can include qualifying professional subscriptions, uniforms, tools, business travel or additional household expenses where HMRC’s conditions are satisfied.

Ordinary commuting, everyday clothing and expenses reimbursed by an employer are generally not eligible.

Emergency Tax on Pension Withdrawals

A flexible pension withdrawal may be taxed using an emergency code, particularly when it is the first payment from the pension. This can result in too much tax being deducted. The correct HMRC form depends on whether you emptied the pension pot, took part of it or have another source of income.

Overpayments Through Self Assessment

A Self Assessment account may show a credit after filing a return, amending figures, reducing Payments on Account or making duplicate payments. A repayment can generally be requested once HMRC has processed the relevant return or adjustment.

Redundancy and Termination Payments

Some redundancy and termination payments include both taxable and tax-exempt elements. Wages, holiday pay and post-employment notice pay are generally taxed through PAYE, while qualifying termination payments may benefit from the separate £30,000 exemption. A refund may be due if excessive tax was deducted from the taxable parts.

How to Claim Tax Refund from HMRC

The process used to claim tax refund HMRC payments depends on the source of the overpayment. HMRC’s online refund checker can direct you to the correct service or form.

1. Identify why too much tax was paid.
2. Confirm the tax year and calculate the amount you believe was overpaid.
3. Gather supporting records such as P60s, P45s, payslips, pension statements, expense receipts and tax calculations.
4. Use the relevant HMRC online service, form, Personal Tax Account or Self Assessment account.
5. Keep a copy of the claim and supporting calculation.
6. Check your HMRC account for requests for further information or confirmation of the repayment.

Do not submit several claims for the same overpayment through different routes, as this can delay HMRC’s review.

Claiming a PAYE Tax Refund

After the end of a tax year, HMRC reconciles PAYE records using information supplied by employers and pension providers. Where HMRC identifies an overpayment, it may issue a P800 tax calculation or make the refund available through your Personal Tax Account or the HMRC app, which can also be used to make Self Assessment tax payments if you have a balance to settle elsewhere.

If a P800 says that a refund is due, you may be able to claim it online using a UK bank account. HMRC states that an online P800 repayment is normally sent within five working days, while a cheque request can take longer.

If you believe you overpaid but have not received a calculation, use HMRC’s official refund checker rather than waiting indefinitely.

Claiming After You Have Stopped Working

You may be able to make an in-year claim if you have stopped working and do not expect to return to employment before the end of the tax year. HMRC’s P50 process may be relevant where you:

• Have been unemployed for at least four weeks
• Are not receiving taxable state benefits
• Have retired without receiving a pension from your former employer
• Have returned to full-time study
• Do not expect to work again during the tax year

The P50 route is not suitable in every case. For example, different procedures apply if you are receiving taxable benefits, have started another job or continue to receive pension income.

How to Claim a Self Assessment Tax Refund

If you submit Self Assessment, the repayment should usually be dealt with through your Self Assessment account rather than through a PAYE refund form.

After HMRC processes your return, you can review the account and request repayment of an available credit. HMRC may instead use the credit against:

• Other tax that is already overdue
• A liability due within the next 45 days, such as a Payment on Account
• Another outstanding HMRC debt

This means a credit on your account will not always be paid directly into your bank. If the offset leaves you with a balance you’re unable to clear straight away, it’s worth knowing how to set up a Self Assessment payment plan with HMRC rather than letting the amount go unpaid.

Amending a Self Assessment Return

If the overpayment arose because your submitted return contained an error or missed a relief, you can normally amend the return within 12 months of the statutory filing deadline.

For example, a 2024/25 online return had a normal filing deadline of 31 January 2026, so the standard amendment window generally closes on 31 January 2027.

After the amendment window closes, you may need to make an overpayment relief claim instead. This has separate conditions and should not be treated as a substitute for an amendment that can still be made.

Where an amendment reduces your expected refund or creates an additional balance to pay, you can usually settle this by paying tax by direct debit or paying tax by credit or debit card through your HMRC online account.

How Long Do You Have to Claim Tax Refund Payments?

Many Income Tax refund and overpayment relief claims are subject to a four-year time limit, calculated from the end of the relevant tax year.

As of the 2026/27 tax year, a standard claim for 2021/22 would ordinarily be outside the four-year time limit because its deadline was 5 April 2026. The exact deadline and claim route can vary according to the type of repayment, so do not delay once an overpayment is identified.

What Information Do You Need for a Tax Refund Claim?

The documents required will depend on the reason for the claim. You may need:

• Your National Insurance number
• Your Unique Taxpayer Reference if you use Self Assessment
• P60 and P45 forms
• Payslips and pension statements
• A P800 or other HMRC tax calculation
• Details of taxable benefits
• Receipts and evidence for employment expenses
• Bank interest or investment statements
• Foreign income and foreign tax records
• Details of tax already repaid or set against another liability
• UK bank details where an online repayment is available

Your calculation should explain the amount claimed and why the tax was overpaid. HMRC may request further evidence before authorising payment.

Can You Claim Tax Relief for Job Expenses?

Tax relief may be available where an employee pays an employment expense personally and the cost is required for the job. Typical claims can relate to:

• Cleaning, repairing or replacing a uniform or specialist clothing
• Tools and equipment required for work
• Professional fees and subscriptions approved by HMRC
• Business mileage where an employer paid less than the approved amount
• Necessary business travel that is not ordinary commuting
• Working from home where the employee is required to work at home and the applicable conditions are met

Relief reduces the income on which tax is calculated; it does not normally reimburse the full expense. For example, £100 of eligible relief saves £20 for a basic-rate taxpayer and £40 for a higher-rate taxpayer, subject to their wider tax position.

Can Non-Residents Claim Tax Back?

A person living abroad may be able to claim UK personal allowances or recover tax overpaid on UK income. Eligibility depends on residence status, nationality, treaty provisions and the type of income received.

Non-residents who already complete a UK Self Assessment return should normally make the relevant claims through that return. Foreign income and residence claims can be complex, particularly following changes to the UK’s rules from 6 April 2025, so specialist advice may be appropriate.

How Long Does an HMRC Tax Refund Take?

Processing times depend on the type of claim, the method used and whether HMRC needs to carry out additional checks. Straightforward P800 refunds claimed online can be quicker than paper claims or complex Self Assessment repayments.

HMRC may delay a refund while it verifies:

• Your identity and bank details
• The income and tax figures reported
• Employment expense claims
• Repayment nominations to an adviser or other person
• Whether another tax liability should be settled first
• Unusual or high-value repayment requests

Respond promptly if HMRC requests evidence, but verify that the contact is genuine before providing personal or financial information.

Tax Refund Scams and Repayment Agents

Fraudsters frequently send messages promising an HMRC refund and asking taxpayers to click a link or disclose bank details. Access your Personal Tax Account independently through GOV.UK rather than through a link in an unexpected email or text.

You should also review the terms of any commercial refund company before appointing it. Check:

• How its fee is calculated
• Whether VAT or administration charges are added
• Whether it will receive the refund before paying you
• What authority you are giving the company
• Whether the claim is accurate and supported by evidence

You remain responsible for the accuracy of information submitted to HMRC on your behalf.

Common Tax Refund Claim Mistakes

• Using the wrong claim form
• Claiming an expense that was reimbursed by an employer
• Missing the four-year time limit
• Submitting duplicate repayment requests
• Failing to amend a Self Assessment return within the amendment window
• Using figures from the wrong tax year
• Ignoring other taxable income when calculating the refund
• Providing bank details through a suspicious message
• Assuming a Self Assessment credit will always be paid rather than offset

What to Do If HMRC Rejects Your Claim

If HMRC rejects or reduces your claim, review its explanation and compare the decision with your records. The next step may involve:

1. Providing missing evidence or correcting a calculation
2. Asking HMRC to explain the decision
3. Requesting a formal review where review rights are available
4. Appealing within the stated time limit
5. Obtaining professional advice on an overpayment relief claim or disputed tax calculation

Do not resubmit the same claim without addressing the reason it was refused. If a rejected claim means an expected refund doesn’t materialise and you’re left unable to pay tax you owe, our guides on what to do if you cannot pay your tax on time and how to spread tax payments using Time to Pay explain the options available before the debt escalates.

Getting Professional Help to Claim Tax Refund Payments

At CIGMA Accounting, we help employees, pensioners, sole traders, landlords, company directors and internationally mobile individuals review tax calculations and submit supported repayment claims. We can also check whether an apparent overpayment should be refunded, used against another liability or corrected through Self Assessment.

Our accountants work with clients through offices across London, providing practical assistance with PAYE reconciliations, employment expenses, pension tax, foreign income and HMRC correspondence.

Final Thoughts on How to Claim Tax Refund Money

To claim tax refund payments successfully, first establish why the overpayment arose and use the correct HMRC process for that income source and tax year. Gather supporting records, check the four-year time limit and avoid relying on unexpected refund messages or unsupported claims.

Where a Self Assessment return is involved, review whether you can still amend it before making a separate overpayment relief claim. Acting early gives you more time to correct the position and claim tax refund HMRC money before the applicable deadline expires. Reviewing overpayments and refund opportunities is also a natural part of broader pre-tax year-end planning, helping ensure your overall tax position is accurate before the next tax year begins.

Claim Tax Refund Case Study

Sarah, an employee, visited our Fulham office after noticing that too much Income Tax had been deducted from her salary following a change of jobs earlier in the tax year. Although she believed she was entitled to claim a tax refund, she wasn’t sure whether HMRC would repay the money automatically or if she needed to take action herself.

After reviewing her PAYE records, P45 and P60, we confirmed that an incorrect tax code had resulted in an overpayment. We explained the correct process to claim a tax refund from HMRC, including how to check whether the repayment should be requested through her Personal Tax Account or whether HMRC would issue the refund automatically after reviewing her records.

During the meeting, Sarah also mentioned that she had received a text message promising a fast HMRC refund if she clicked a link and entered her bank details. We explained that claim tax refund HMRC scams are increasingly common and advised her to access her Personal Tax Account directly through the official GOV.UK website rather than responding to unexpected emails or text messages. Taking this simple precaution helps protect both personal information and genuine tax repayments.

By the end of the meeting, Sarah understood that successfully claiming a tax refund is about more than identifying an overpayment. Using the correct HMRC process, keeping supporting records and staying alert to refund scams can help ensure any repayment is received securely and without unnecessary delays.

Claim Your Tax Refund With Confidence Through Cigma Accounting in London

Knowing how to Claim tax refund correctly can help you recover tax you’ve overpaid while ensuring your claim meets HMRC requirements. Cigma Accounting supports clients across the Wimbledon, including individuals and businesses in Norbury and Mitcham, helping taxpayers identify refund opportunities and submit accurate claims.

Whether you need to claim tax return following an overpayment or want to understand how to claim tax refund through HMRC, it’s important to provide the correct information and supporting records. Understanding the Claim tax refund UK process and following the Claim tax refund HMRC guidance can help you receive any repayment you’re entitled to as quickly as possible.