How to Claim a Tax Refund from HMRC: A Step-by-Step Guide

Dealing with taxes can feel complicated, but what if you’ve paid too much? You could be owed money back from HM Revenue and Customs (HMRC). Our simple guide is here to help. We’ll explain the common reasons why you might be owed a tax refund and show you exactly how to claim your money back, stress-free.

First, Are You Owed a Tax Refund? 5 Common Reasons

Before you can claim, it’s important to understand if you’re likely to be owed a refund. Many people overpay tax without even realising it, often due to simple administrative errors. Your tax code is the key to understanding your pay and whether you’ve paid the right amount. Here are five of the most common reasons you might be due a tax rebate.

1. You were put on the wrong tax code

This is one of the most frequent causes of tax overpayment. It often happens when you start a new job, begin working for an employer after being self-employed, or have multiple jobs at the same time. If your employer doesn’t have your correct details, they may put you on an ’emergency’ tax code. You can check your payslip for codes like 1257 W1, 1257 M1, or 1257 X. These codes mean your tax is calculated on a temporary basis and doesn’t account for your full tax-free personal allowance for the year, often resulting in you paying too much.

2. You have claimable work-related expenses

Did you know you can claim tax relief on certain essential work-related costs? If you’ve had to buy your own uniforms, repair or replace small tools needed for your job, or pay for professional subscriptions, you may be able to claim a refund on the tax you paid. This also includes allowances if your employer requires you to work from home. These expenses effectively reduce your taxable income, meaning you could be owed some money back.

3. You stopped working part-way through the tax year

Your tax-free personal allowance (the amount you can earn before paying any income tax) is applied across the entire tax year, which runs from 6th April to 5th April. If you stopped working for any reason-perhaps you retired, were made redundant, or took an extended break-your tax was likely calculated as if you were going to be earning for the full year. Because you stopped earning, you probably didn’t use your full tax-free allowance, which means you have almost certainly overpaid tax and are due a refund.

4. You’re self-employed and made ‘payments on account’

If you’re self-employed, you often have to make advance payments towards your next tax bill, known as ‘payments on account’. These payments are based on your earnings from the previous tax year. However, if your income dropped in the current year, your advance payments will have been too high. You can claim this overpayment back as a refund when you file your Self Assessment tax return.

5. You have other untaxed income (e.g., savings interest)

Sometimes your tax code doesn’t correctly account for all your income sources, particularly things like interest from savings. While this can sometimes lead to an underpayment, it can also result in an overpayment. In these cases, HMRC will usually review your record after the tax year ends and send you a P800 tax calculation letter notifying you that you are due a refund.

How to Claim Your Tax Refund: A 4-Step Process

Once you suspect you’ve overpaid, it’s time to claim your money back. The process can be straightforward if you follow the right steps. The exact method will depend on your personal circumstances, but having the right documents to hand will make the process much smoother and quicker.

Step 1: Check if you are due a refund online

The best place to start is the official source. You can use the HMRC online checker to see if you might be due a refund. This simple tool will ask you a few questions about your employment and income. You’ll need your National Insurance number to use it. While it’s not a final confirmation, it will give you a good indication of whether you should proceed with a claim.

Step 2: Gather your essential documents

To make a claim, you’ll need some key pieces of information. It’s a good idea to gather these before you start:

• Your P60: This is a summary of your pay and the tax you’ve paid in the tax year. Your employer gives you one at the end of each tax year.
• Your P45: You get this from your employer when you leave a job. It shows your earnings and tax paid up to the point you left.
• Records of work-related expenses: Keep receipts or a list of any claimable expenses you’ve paid for.

Step 3: Make your claim through the correct channel

How you claim depends on your situation:

• For simple PAYE issues: If you’ve been on the wrong tax code, you can often correct this using your HMRC personal tax account online.
• For work expenses: You may need to fill out a P87 form. This can be done online or by post.
• If you file Self Assessment: Any overpayment is calculated automatically when you file your tax return. You simply request the refund as part of the filing process.

Step 4: Wait for confirmation and payment

After submitting your claim, HMRC will review it. They will send you a confirmation, usually by post, to let you know if your claim has been successful and how much you’ll receive. Refunds are typically paid directly into your chosen UK bank account. It’s always wise to keep a copy of your claim for your own records.

After You’ve Claimed: What to Expect

Once your claim is submitted, the waiting begins. Understanding the timelines and what to look out for can help reduce any anxiety. It’s also crucial to be aware of potential scams targeting people expecting a refund.

How long does an HMRC tax refund take?

The time it takes to get your money back can vary. Claims made through your online tax account are generally the fastest and can often be processed within a few weeks. Postal claims will naturally take longer. If you’re claiming through a Self Assessment return, your refund will usually be processed and paid within a few days of filing, although it can take longer during busy periods like the January deadline.

What is a P800 tax calculation?

A P800 is an important letter from HMRC. They send one if their records show you have either overpaid or underpaid tax for a specific year. If you are owed a refund, the P800 will explain why and tell you how to claim your money online. It’s vital that you don’t ignore this letter. Always check the figures carefully to ensure they match your own records.

Warning: How to spot tax refund scams

Unfortunately, scammers often target people who might be due a tax refund. It is critical to remember that HMRC will never send you an email, text message, or WhatsApp message about a tax rebate or refund. Any message like this is a scam. They will never ask you to provide personal or bank details via these methods. If you receive a suspicious message, delete it and report it. Always log in to your official HMRC account directly to check on the status of a genuine refund.

When to Ask an Accountant for Help

While many tax refund claims are simple, sometimes things can get complicated. Knowing when to ask for professional help can save you time and ensure you get back everything you’re entitled to, taking the stress out of dealing with HMRC.

DIY is fine for simple cases

If you’ve received a P800 from HMRC or have a straightforward case of being on an emergency tax code for a short period, you can often handle the claim yourself. The HMRC online service is designed to make these simple claims as easy as possible, and you should feel confident managing it on your own.

Consider an accountant if…

It might be time to call in an expert if your situation is more complex. You should consider getting professional help if:

• Your tax affairs involve multiple jobs, pension income, and other earnings.
• You want to be certain you’ve claimed for every possible work-related expense.
• You simply don’t have the time or confidence to go through the process yourself.
• You find dealing with HMRC intimidating and would rather an expert handle it.

Let us handle the paperwork for you

Our team of chartered accountants can manage the entire claim process on your behalf. We ensure your claim is not only accurate but also maximised, so you get back every penny you are owed. We are here to provide our “three freedoms”: more time for you, more money in your pocket, and more peace of mind. We take the task completely off your hands. Contact us today for a free, no-obligation chat.

Frequently Asked Questions

How far back can I claim a tax refund?

You can claim a tax refund for the last four tax years. For example, in the 2024/25 tax year, you can claim as far back as the 2020/21 tax year.

Do I have to pay tax on my tax refund?

No, a tax refund is simply your own money being returned to you because you overpaid. It is not considered new income, so it is not taxable.

What happens if HMRC thinks I’ve underpaid tax?

If HMRC calculates that you’ve underpaid tax, they will send you a P800 letter or a simple assessment explaining why and how much you owe. They will usually arrange to collect the underpayment through your tax code in the following year.

Can I get a tax refund if I’m retired?

Yes. It’s common for people to be due a refund in the year they retire, as their tax code may not have been updated in time. You can also be due a refund on tax paid on a pension lump sum.

What’s the difference between a tax refund, rebate, and repayment?

These terms are often used interchangeably and all mean the same thing: HMRC is returning money to you because you have paid too much tax.

Why would a third-party company offer to claim my refund for me?

These are tax refund companies that will manage your claim in exchange for a significant percentage of your refund. While they can be helpful, it’s often possible to claim for free yourself directly from HMRC. For more complex cases, a qualified accountant can provide a more comprehensive service.

Navigating the world of tax refunds doesn’t have to be a source of stress. Whether you handle it yourself or decide you need expert support, the most important step is checking if you’re owed money in the first place. As Fully Qualified Chartered Accountants with local offices in Alloa, Stirling, and Falkirk, we’re dedicated to helping our clients achieve financial clarity and peace of mind. Think you’re owed a refund? Let our experts take it off your hands.