Gift Aid calculator UK: charity donation top-up
Calculate the Gift Aid top-up on a qualifying charity donation. See the total received by the charity and the minimum UK tax needed to cover the reclaim.
Enter your figures
Total donation received by charity
Inputs changed. Select Calculate result to update your estimate.
Assumes a valid Gift Aid declaration and sufficient UK Income Tax or CGT paid to cover all charity reclaims. Excludes Payroll Giving. Shows charity top-up only; any additional higher-rate personal tax relief is separate.
How the gift aid calculator uk: charity donation top-up works
Charity reclaim = donation × 25%. Total received = donation × 1.25.
UK data and rules
2026/27 data · Checked 16 October 2026. Rules are a dated snapshot, not a live feed.
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Worked example: gift aid top-up
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Your donation (£)
- 100
Total donation received by charity: £125.00
Charity reclaim = donation × 25%. Total received = donation × 1.25.
Gift Aid top-up: questions answered
Does Gift Aid apply if I have not paid enough UK tax?
You must have paid enough qualifying UK Income Tax or Capital Gains Tax to cover all charity reclaims for the tax year. If the reclaim exceeds tax paid, you may need to pay the difference.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
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