Gross up a donation and estimate additional higher-rate relief. This is the right page when you want to see the real value of a charitable gift after the charity’s claim and any donor relief are included.
CHARITABLE GIVING
Gift Aid calculator
Estimated result
£1,250
- Charity claims
- £250
- Potential donor relief
- £250
You must have paid enough UK Income Tax or Capital Gains Tax to cover the charity’s claim.
Turn a donation into its gross value and check whether higher-rate relief makes the gift more efficient than it first appears.
Gross up a donation and estimate additional higher-rate relief. This is the right page when you want to see the real value of a charitable gift after the charity’s claim and any donor relief are included.
A £1,000 donation can be grossed up to £1,250 for Gift Aid purposes. That means the charity may reclaim £250, and a higher-rate taxpayer may also be able to claim additional relief, subject to their own tax position.
- You must have paid enough UK Income Tax or Capital Gains Tax to cover the charity’s claim.
- The benefit depends on your own tax band, so two donors giving the same amount can see different outcomes.
- Gift Aid interacts with your wider tax position, not just the donation amount alone.
SOURCES & REVIEW
Checked against official guidance
Last reviewed 1 September 2026 · Rule version GB-2026.27.1
Daily/weekly source monitoring. If a source changes, the affected rule set is reviewed before publication.
All source links are kept visible so you can verify the figures used on this page.
Source line: Gift Aid relief is checked against GOV.UK guidance on tax relief when donating to charity.
GOV.UK: Gift Aid ↗Sources, methodology and update policy →Report an issue or correction →WHY RESULTS DIFFER
Why two users can see different results
Why the result can differ
Different tax codes, payroll periods, Scottish bands, pension methods or lender assumptions can change the outcome.
One-off bonuses, pay frequency, overpayments, allowances and reliefs can move the result away from a simple annual estimate.
Where a rule depends on eligibility or legal status, this page shows an estimate and links to official guidance.
This section is intentionally repeated on key tools so the explanation stays near the result instead of being hidden in a separate policy page.
COMMON QUESTIONS
Frequently asked questions
Can every donor use Gift Aid?
No. You need to have paid enough UK tax to cover the charity’s claim.
Does Gift Aid always help the donor?
Not always. The charity claim can still work even if the donor’s own higher-rate relief is small or nil.
Does the calculator replace the charity’s check?
No. The charity still needs to follow the official Gift Aid rules before claiming.