Claim Back Money You May Have Overpaid in Tax
Check whether you were placed on the wrong tax code and reclaim any tax you may have overpaid.
An Incorrect Tax Code Refund allows you to claim back money if you were placed on the wrong tax code and paid too much tax as a result.
Your tax code tells your employer or pension provider how much tax to deduct from your income.
If it’s wrong - even for a short period - you could be overpaying hundreds or even thousands of pounds without realising.
You may have been placed on the wrong tax code if:
These situations can easily lead to tax code mistakes, resulting in you paying more tax than you should — often without realising.
You can typically reclaim overpaid tax from the last 4 tax years.
We combine technology and simplicity to help you unlock refunds, reliefs, and compensation you may never have realised you were entitled to.
Simple. Fast. Stress-free.
Answer a few questions on our online form to see how much you could eligible for.
Answer simple questions & our AI system prepares everything for you.
Your completed claim is ready to print and send instantly.
Sit back and wait for your money to arrive.
Join ClaimItMyself today, unlock Incorrect Tax Code Refund and dozens of other high-value claims, and start putting money you are owed back into your pocket.
Complete the form and get back what you're owed.
Real people. Real results. Simple claims you can submit yourself.
I’m really grateful for the help I received with my incorrect tax code claim. The whole process was incredibly simple and easy to follow. I received £3,671.92 back in just under 2 weeks. I just wanted to say thank you so much. Highly recommended!
I recently used their service to make a claim for an incorrect tax code, and I couldn’t be happier with the experience. The whole process was incredibly simple from start to finish.
The whole process took less than 60 seconds to complete online, and then I simply printed the claim form and sent it off. It couldn’t have been easier. Iv been told by HMRC that I am owed over £6000 in overpaid tax :)
An Incorrect Tax Code claim is a request to review whether you have paid too much tax due to being placed on the wrong tax code by HMRC. If your tax code was incorrect, you may be entitled to a tax refund for the overpaid amount.
You may qualify if you:
● Are employed or have been employed and paid tax through PAYE
● Have had changes in jobs, income, or benefits
● Believe your tax code may have been incorrect at some point
Many people are unaware they have been on the wrong tax code, which can lead to overpaying tax without realising it.
Processing times can vary, but HMRC reviews typically take around 6–8 weeks, depending on the information required to assess the claim.
The refund amount varies depending on how much tax was overpaid, but many successful claims receive around £900 on average.
Yes. If HMRC confirms you have overpaid tax, you may be able to claim refunds for previous tax years. This means you could receive a lump sum payment covering the tax you overpaid.
It’s very easy to complete our 60-second form. The form simply asks for a few basic details so the claim process can begin.
Our Monthly Membership is £4.99 per month and our Annual Membership is £49.99 per year. The Financial Health Check will be £99.99 per year when launched. You keep 100% of any refunds you claim & we never take a cut.
