How Gift Aid Works (and How to Get Your Tax Back)
By calculatemysalary.co.uk Editorial Team
Gift Aid lets charities reclaim 25% on your donations at no cost to you. If you pay higher-rate tax, you can claim money back too. Here is how.
Most people tick the Gift Aid box on a donation form without thinking about it. The charity gets a bit extra from HMRC, and that's that. But if you're a higher-rate taxpayer, you're probably leaving money behind — because there's extra tax relief you need to claim yourself.
How the maths works
When you donate through Gift Aid, the charity reclaims basic-rate tax (20%) from HMRC. In practice, this means your donation gets grossed up by 25%.
You donate £100. HMRC treats that as £125 before tax (because £125 minus 20% = £100). The charity claims back the £25 difference. Your £100 becomes £125 at no extra cost to you.
One condition: you need to have paid enough income tax or capital gains tax that year to cover the amount the charity reclaims. If you donate £1,000 and the charity claims £250, you must have paid at least £250 in tax that year. If you haven't, HMRC will come after you for the shortfall.
What higher-rate and additional-rate taxpayers get back
If you pay basic-rate tax (20%), Gift Aid only benefits the charity. Your own tax bill doesn't change. But if you pay 40% or 45%, you can claim the difference back from HMRC.
For a £100 donation:
| Your tax rate | Charity receives | You claim back | Your actual cost |
|---|---|---|---|
| Basic (20%) | £125 | Nothing | £100 |
| Higher (40%) | £125 | £25 | £75 |
| Additional (45%) | £125 | £31.25 | £68.75 |
The higher-rate relief is 20% of the gross donation (20% of £125 = £25). Additional-rate relief is 25% of gross (25% of £125 = £31.25).
This scales up quickly. If you donate £2,000 a year and pay 40% tax, the charity gets £2,500 and you claim back £500.
How to claim the extra relief
The charity handles the basic 20% reclaim automatically when you sign a Gift Aid declaration. The extra relief for higher-rate and additional-rate taxpayers won't come to you unless you ask for it.
Two options:
- Self Assessment — enter your donations in the charitable giving section of your tax return. HMRC works out the relief and either reduces your bill or sends a refund.
- Tax code adjustment — call HMRC on 0300 200 3300 and tell them about your regular donations. They spread the relief across your monthly PAYE so your take-home pay goes up immediately, rather than you waiting months for a refund.
The second option is underused and worth knowing about if you donate a consistent amount each year.
Payroll giving
If your employer offers payroll giving (sometimes called Give As You Earn), donations come out of your gross pay before tax. You get relief at your full marginal rate straightaway with nothing to claim afterwards.
A £100 payroll donation costs a basic-rate taxpayer £80, a higher-rate taxpayer £60, and an additional-rate taxpayer £55. The charity receives exactly £100 — no Gift Aid top-up applies because the donation is already pre-tax.
Not all employers offer this, but it's worth asking HR.
Mistakes that cost you
A few things that trip people up:
- Missing the declaration. The charity can only reclaim from HMRC if you've signed a Gift Aid declaration. Online donation forms usually have a checkbox — make sure you tick it.
- Donating more than you've paid in tax. If your tax bill for the year is less than the total Gift Aid claimed by charities on your behalf, HMRC will bill you for the difference. Watch this if you've stopped working, gone part-time, or have very low income.
- Forgetting to claim higher-rate relief. HMRC won't remind you. If you pay 40% or 45% tax and have made Gift Aid donations over the past few years, check whether you've been claiming. You can go back four tax years.
Check your tax position
Use our salary calculator to see which tax band you're in and work out how Gift Aid donations affect your overall tax bill.