How Far Back Can You Claim a Tax Rebate?

One of the most common questions about tax rebates is how many years you can go back. The short answer is the current tax year plus the previous four, but timing matters, because you lose a year every 5 April. This guide explains the rules and why claiming sooner protects your money.

The four year rule

For most employment expense and overpaid tax claims, HMRC lets you claim for the current tax year and the four tax years before it. That means at any point you can usually claim across five tax years in total.

Why timing matters

The UK tax year runs from 6 April to 5 April. Each time a new tax year begins, the oldest year in your four year window drops off and can no longer be claimed. So a year you could have claimed in March may be gone by the following April. If you have several years of unclaimed expenses, claiming promptly can be the difference between recovering five years and recovering four.

What you can backdate

The four year rule applies to common claims such as the uniform maintenance allowance, work mileage, tools and professional fees. It also applies to tax overpaid because of a wrong tax code. If you have been in the same role paying the same costs for years, you can usually claim the whole period in one go.

An example

Imagine you have washed your own uniform for the last five years and never claimed. By submitting now, you could claim the current year plus the previous four. Wait until after the next 5 April, and the earliest of those years falls out of range, so you would recover one year less.

How to claim

Employees usually claim using a P87, either directly from HMRC for free or through a service like TaxPro. We check every eligible year so nothing is missed, and deal with HMRC for you on a no win, no fee basis. Try our tax rebate calculator to get a sense of what you could be owed.

Frequently asked questions

Can I claim more than four years back?

For most expense and overpaid tax claims, no. The limit is the current year plus four previous tax years.

When exactly does a year drop off?

At the end of the tax year, on 5 April. After that date, the earliest year in your window can no longer be claimed.

Does the four year rule apply to a wrong tax code?

Yes. Tax overpaid because of an incorrect code can generally be reclaimed within the same four year window.

How long does a claim take?

Once submitted, refunds usually come through in around 10 days, with the whole process often taking 8 to 10 weeks.

Do not leave money with HMRC

If you have unclaimed work expenses, every 5 April that passes could cost you a year of refund.

Start your claim with TaxPro and we will claim every year you are owed, on a no win, no fee basis.