UK tax · Reliefs
Gift Aid calculator.
The charity adds 25p to every £1 you give, and higher-rate taxpayers can claim more back.
Inputs
Gift Aid
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How does Gift Aid work?
If you pay UK Income Tax or Capital Gains Tax, a charity or community amateur sports club can claim an extra 25p for every £1 you give, at no extra cost to you, once you sign a Gift Aid declaration. So £100 becomes £125 for the charity. If you pay tax at a higher rate you can claim back the difference between your rate and the basic rate on the grossed-up amount (GOV.UK): at 40% you claim 20% of £125, which is £25. Your donations only qualify if they are no more than 4 times the tax you paid in that tax year.
Worked example. A £100 gift grosses up to £125. The charity reclaims £25. A 40% taxpayer claims £25 more, so the £125 gift costs £75. Gift Aid donations also reduce adjusted net income by the grossed-up amount (£125 here), which can help with the £100,000 allowance taper.
Frequently asked questions
How much can a charity claim with Gift Aid?
25p for every £1 you give, so a £100 donation is worth £125 to the charity.
How do I claim higher-rate relief?
Through your Self Assessment return, or by asking HMRC to change your tax code. The claim is the gross gift times your rate less 20%.
Do I need to pay tax for Gift Aid to work?
Yes. Your donations must be no more than 4 times the tax you paid that year, otherwise HMRC may ask you to pay the difference.
Does Gift Aid help with the £100,000 taper?
Gift Aid donations reduce your adjusted net income, which can bring you back under £100,000 and restore Personal Allowance.
Sources
Checked
- GOV.UK: Donating to charity through Gift Aid
- GOV.UK: Adjusted net income
- GOV.UK: Income Tax rates and Personal Allowances
- GOV.UK: Income Tax in Scotland
Figures are for the 2026-27 tax year. Runs entirely in your browser. Nothing you type is sent or stored.
Scope
A planning estimate using standard rates, not tax advice or an HMRC calculation. Your own position may differ. Check GOV.UK, your HMRC account or a qualified adviser before acting.