Are You Owed a Tax Rebate?

What a tax rebate really is

A tax rebate, sometimes called a tax refund, is money HMRC gives back when you have paid more tax than you actually owed. It is your money. You earned it, it was taken from your pay or your savings, and the rules say you should get it back. The catch is that HMRC does not always send it to you automatically. In a lot of cases you have to notice the problem and ask for the money yourself, and most people never do.

That is the whole reason this tool exists. The Tax Rebate Checker walks through your situation, points to the reliefs and allowances you are likely entitled to, puts a rough pound figure next to each one, and tells you how to claim it. It takes about a minute and there is nothing to download.

How do you know if you are owed a tax rebate?

You may be owed a rebate if any of these have happened in the last four years. You changed jobs and had a gap, or you were put on an emergency tax code when you started. You work from home for your employer. You pay to wash or replace a work uniform. You use your own car for work and your employer pays less than the official mileage rates. You pay into a personal pension and you are a higher-rate taxpayer. You gave to charity through Gift Aid and earn over the higher-rate threshold. You are married and one of you earns under the Personal Allowance. You paid tax on savings interest that fell inside your allowance.

None of these are loopholes or tricks. They are normal reliefs written into UK tax law. The problem is that nobody sits you down and explains them, so the money quietly stays with HMRC.

The rebates and reliefs people miss most

Here are the ones that come up again and again, with the kind of figures involved for the 2026/27 tax year.

Marriage Allowance

If you are married or in a civil partnership and one of you earns less than the £12,570 Personal Allowance, the lower earner can transfer £1,260 of allowance to the other. That is worth £252 a year, and because you can backdate it up to four years, a first claim can be worth well over £1,000 in one go. It is one of the most missed reliefs in the country.

Uniform and work clothing

If you wear a recognisable uniform or protective clothing for work and you pay to clean, repair or replace it, you can claim a flat-rate expense. The standard amount is £60 a year, but it is higher for many jobs. Nurses can claim £125, and some trades claim more. You get tax relief at your tax rate on that amount, and you can backdate the claim four years.

Working from home

Employees who have to work from home can claim tax relief on £6 a week of household costs without keeping a single receipt. It is not a fortune on its own, but it adds up, and a lot of people who were sent home to work never claimed it.

Higher-rate pension tax relief

This is the big one for higher earners. When you pay into a personal pension, the scheme adds 20 percent basic-rate relief for you automatically. If you pay 40 percent or 45 percent tax, you are owed another 20 or 25 percent on top, but you have to claim it through Self Assessment or by contacting HMRC. Huge numbers of higher-rate taxpayers never do, and they are leaving hundreds or thousands of pounds behind every year.

Mileage you were not paid for

If you drive your own car for work, HMRC lets your employer pay you 45p a mile for the first 10,000 miles and 25p after that, tax free. If your employer pays less than that, you can claim tax relief on the difference. Over a year of regular driving that shortfall can be substantial.

A tax code that was wrong

If you were put on the wrong tax code, even for a few months, you may have overpaid without ever noticing. This is so common that we built a separate tool for it. Once you have run the Rebate Checker, it is worth running the Tax Code Checker too.

A real example

Take Sarah, a nurse who earns £31,000 and is married to someone who works part time and earns under the Personal Allowance. She washes her own uniform and works the odd shift from home. When Sarah runs the checker she finds three things. Marriage Allowance is worth £252 a year, and because she has never claimed it, she can backdate it for roughly £1,260. The nurses uniform allowance is worth £125 a year in expenses. Working from home relief adds a little more. In total she is looking at well over £1,500 she could put back in her pocket, none of which HMRC was ever going to send her on its own.

Now take James, who is self employed and earns £55,000. His missed reliefs look completely different. He can claim the full cost of tools and a van through capital allowances, deduct mileage, use the home office flat rate, and reclaim higher-rate pension relief. Same tool, same minute of effort, a very different list. That is the point. The checker reacts to your life, not to your job title.

How far back can you claim?

For most income tax reliefs you can go back four tax years. So in 2026/27 you can usually claim for 2022/23 onwards, as long as you were eligible at the time. This is why a first claim is often the biggest. Four years of an unclaimed allowance, paid in one lump, can be a genuinely useful amount of money.

How to claim your rebate, step by step

The exact route depends on the relief, but the pattern is usually the same.

1. Check what you are owed using this tool so you know which reliefs apply to you.
2. Sign in to your Personal Tax Account at gov.uk, or set one up if you have not got one. This is the fastest way to deal with most claims.
3. For job expenses like uniform, mileage and working from home, use the employee expenses service on gov.uk.
4. For Marriage Allowance, use the dedicated Marriage Allowance service and ask to backdate it.
5. For higher-rate pension or Gift Aid relief, include it on your Self Assessment return, or contact HMRC if you do not file one.
6. If HMRC agrees you overpaid, you will usually get a P800 calculation telling you how much you are due and how to get it.

You never have to pay a third party a percentage to claim a standard rebate. The official routes on gov.uk are free, and the links in your results take you straight to them.

How the Tax Rebate Checker works

The checker asks a short set of questions about your income, your work, your family and your savings. It then runs your answers against the main UK reliefs for the current tax year and shows the ones you appear to qualify for, each with an estimated value. It also flags tax traps, like the 60 percent effective rate that hits income between £100,000 and £125,140, and shows the move that can fix them.

The figures are honest estimates based on 2026/27 rates, designed to show you what is worth chasing. Your exact entitlement depends on your full circumstances, and HMRC always has the final say. Think of the result as a map, not a tax return.

Is it safe to check?

Yes. Checking what you are owed does not trigger anything with HMRC and cannot get you in trouble. You are simply finding out which reliefs you qualify for. If you create a free account, your answers are stored securely and encrypted, and we never sell your data. If you would rather not, you can see your total without an account at all.

Common mistakes that cost people money

The most expensive mistake is assuming HMRC will sort it out for you. For some things it does, but for most reliefs it waits for you to ask. The second mistake is leaving it too long and losing the oldest year you could have claimed, because the four-year window keeps moving. The third is paying a claims company a cut for something you could do yourself in ten minutes on gov.uk. Run the checker, see your list, and claim the ones that apply.

Who the Tax Rebate Checker is for

This is not just a tool for one type of worker. Employees on PAYE often overpay through wrong tax codes and unclaimed job expenses. Self-employed people miss capital allowances, mileage and the home office flat rate. Landlords forget the property allowance and other reliefs on rental income. Higher earners leave pension and Gift Aid relief on the table. Pensioners can miss allowances on savings and the more generous Married Couple's Allowance if one of them was born before 6 April 1935. Students and people with side income often do not realise the first £1,000 of trading income is tax free. The checker asks about your situation rather than your job title, so it surfaces the reliefs that actually fit your life.

Why people overpay in the first place

The honest answer is that the system is built around you knowing the rules. HMRC collects tax automatically through PAYE, but it does not chase down every relief you could claim. Frozen thresholds quietly pull more of your income into tax each year, allowances change, and life events like a new job or a second income create gaps that nobody flags for you. The money is yours by right, but the responsibility to claim it sits with you. A one-minute check once a year is the simplest way to make sure you are not handing over more than you have to.

Related calculators and tools

Once you know what you are owed, these tools help you work out the exact figures and act on them.

• Tax Code Checker, see if a wrong tax code has been costing you money.
• Marriage Allowance calculator, work out the transfer between you and your partner.
• Work expense tax rebate calculator, for uniform, tools and other job costs.
• Pension tax relief calculator, check the higher-rate relief you can reclaim.
• Income Tax calculator, see the tax you should be paying this year.
• Self-employed tax calculator, for Income Tax and National Insurance on your profit.

Official sources

Everything in this guide is based on HMRC rules. You can read the official guidance and make free claims here.

• Check how to claim a tax refund (GOV.UK)
• Marriage Allowance (GOV.UK)
• Claim tax relief for your job expenses (GOV.UK)
• Check your Income Tax for the current year (GOV.UK)

Who should use this tool

Runs through the situations that commonly produce a refund: leaving a job partway through the year, an emergency tax code, unclaimed work expenses, unclaimed higher-rate pension relief, and Marriage Allowance never applied. Each is common and each goes unclaimed at scale.

The message worth acting on is that you can claim back four tax years, and that HMRC will not usually contact you about most of these. Higher-rate pension relief in particular is left unclaimed by very large numbers of people, because relief-at-source schemes only add the basic rate automatically.

What this tool assumes

• Common refund triggers are assessed from your answers.
• Claims can generally be backdated four tax years.
• Relief on expenses and pension contributions is worth your marginal rate, not the full amount.
• Results indicate what is worth claiming, not the amount HMRC will pay.

Limitations — what it does not cover

• Your actual tax record, held by HMRC — your Personal Tax Account is the place to check.
• Refund agents, who take 25–40% plus VAT of claims you can make yourself free, sometimes under a deed of assignment covering future refunds too.
• The four-year deadline, after which entitlement is lost permanently.
• Offsetting underpayments from other years.
• Self Assessment filers, who reclaim through the return instead.
• National Insurance refunds, which follow a separate process.