UK Gift Aid Tax Relief Calculator

Gift Aid Guide

How Gift Aid Works?

Gift Aid allows UK charities to reclaim the basic rate income tax (20%) from HMRC that you have already paid on your donation. You must be a UK taxpayer who has paid income tax or capital gains tax at least equal to the Gift Aid claimed. The charity reclaims: 25p for every £1 you donate (because £1 of donation represents 80p of post-tax income, and the remaining 20% of the gross donation = 20p/80p = 25p per £1). Example: £100 donation. Charity claims Gift Aid: £25. Charity receives: £125. You keep no direct benefit from a standard Gift Aid donation unless you're a higher or additional rate taxpayer, who can claim back further relief through self-assessment.

What should I know about Higher Rate Taxpayer Relief?

Higher rate taxpayers (40%) paid 40% tax on the income used for the donation, but HMRC only gives 20% (basic rate) to the charity. The extra 20% can be claimed back by the donor via self-assessment. On £100 donation: charity gets £125 (as before). Donor claims additional 20% of gross (£125 × 20%) = £25 back via self-assessment. Net cost of £100 donation = £100 − £25 = £75. Additional rate (45%) taxpayers: HMRC gives charity 20%, donor claims back 25% (45% − 20%) of gross donation = £31.25. Net cost of a £100 donation for an additional-rate taxpayer: £100 − £31.25 = £68.75.

What do I need to know about Gift Aid Declaration?

To use Gift Aid: a charity must hold a valid Gift Aid declaration from you. Declarations can be given once (covering future donations) or per donation. Online donations: most platforms (JustGiving, GoFundMe, Charity websites) include a Gift Aid tick box. Cash donations: the charity must have a signed declaration. Requirements: you must be a UK taxpayer. Your total income tax paid in the year must be at least equal to the Gift Aid the charity claims (25p per £1 donated). Under-paying tax and using Gift Aid anyway means YOU, not the charity, become liable for the shortfall — HMRC will reclaim the difference from you directly.

What do I need to know about Payroll Giving (Give As You Earn)?

Payroll giving (GAYE) is an alternative to Gift Aid — donations are deducted from your pay before income tax is calculated. Basic rate taxpayers: £100 donation costs £80 from gross pay (same as Gift Aid). Higher rate taxpayers: £100 donation costs £60 from gross pay (better than Gift Aid for higher rate, because National Insurance savings may also apply through salary sacrifice arrangements). No Gift Aid declaration needed for payroll giving — HMRC issues tax relief automatically. Payroll giving is deducted before tax is calculated, so higher and additional rate taxpayers get their full relief immediately through their payslip, rather than needing to claim it back via self-assessment.

How Gift Aid Lets a Charity Reclaim Tax You've Already Paid

Gift Aid allows a UK charity to reclaim basic-rate tax on a donation, as if the donor had made the gift from pre-tax income rather than from income already taxed — adding roughly 25p for every £1 donated, at current basic rate, directly to the value the charity receives, at no extra cost to the donor beyond their original gift. To qualify, the donor must have paid at least as much UK income or Capital Gains Tax in that tax year as the amount being reclaimed by all the charities they've Gift Aided to combined, which is why Gift Aid declarations include a statement confirming the donor expects to have paid enough UK tax to cover the claim.

Why Higher and Additional-Rate Taxpayers Can Claim Extra Relief Themselves

While the charity reclaims the basic-rate tax automatically through Gift Aid, higher and additional-rate taxpayers are separately entitled to claim back the difference between their own higher rate and the basic rate, directly for themselves, usually through their Self Assessment tax return. This means a higher-rate taxpayer's true net cost of a Gift Aided donation is lower than the amount they handed over, since part of it effectively comes back to them as a personal tax reduction, on top of the charity's own reclaim — a detail many higher-rate donors overlook, often leaving legitimate tax relief unclaimed simply because it isn't automatic the way the charity's own reclaim is.

The Gift Aid Small Donations Scheme (GASDS)

<p>Alongside standard Gift Aid, charities can claim a top-up on small cash and contactless donations through the Gift Aid Small Donations Scheme, without needing an individual Gift Aid declaration for each giver. This exists because collecting a name, address and declaration for a £2 bucket donation or a contactless tap at a carol service is impractical. The scheme lets a charity claim a government top-up on small donations up to a scheme limit, which is set relative to how much standard Gift Aid the charity has already successfully claimed in a tax year. It is not a substitute for Gift Aid on larger, traceable donations — those still need a proper declaration to be reclaimed at the usual rate — but it closes a gap for the loose change and contactless giving that makes up a meaningful share of fundraising at events, church collections and street appeals. For donors, there is nothing to do differently; the scheme operates entirely on the charity's side of the claim.</p>

Worked Example: Higher-Rate Taxpayer Claiming Gift Aid Relief

Suppose a higher-rate (40%) taxpayer donates £800 to a registered charity under Gift Aid.

The charity receives £1,000 in total from an £800 donation, thanks to the basic-rate reclaim — but the higher-rate taxpayer must separately claim their own extra relief through their Self Assessment tax return; it isn't given automatically. Someone who forgets to declare Gift Aid donations on their tax return effectively leaves that extra personal relief unclaimed, even though the charity still receives its £200 top-up regardless, since that part is handled directly between the charity and HMRC.

Gift Aid Small Donations Scheme (GASDS)

The standard Gift Aid scheme requires a signed declaration from each individual donor, which isn't practical for small cash collections like a church collection plate or a charity bucket at an event. The Gift Aid Small Donations Scheme exists specifically for this situation, allowing charities to claim a Gift-Aid-style top-up on small cash (and contactless) donations without needing individual declarations, up to a capped amount of small donations per tax year (check the current cap, as it's periodically reviewed) and subject to the charity having a reasonable history of successfully claiming standard Gift Aid first.

This scheme is particularly relevant for charities running bucket collections, church plates, or small fundraising events where collecting individual Gift Aid declarations from every donor would be impractical, letting them still recover a top-up broadly equivalent to basic-rate tax relief on those small, undocumented cash gifts.

When Gift Aid Cannot Be Claimed

Gift Aid has specific eligibility conditions that, if not met, mean the charity cannot claim the reclaim even if a declaration was signed. The donor must be a UK taxpayer who has paid enough Income Tax or Capital Gains Tax in that tax year to cover the amount the charity will reclaim on all their Gift Aid donations combined — someone who donates generously but has paid little or no UK tax in that year (for example, due to low income or being a non-taxpayer) may not actually have enough tax paid to cover the reclaim, and would be responsible for any shortfall if HMRC later finds the declaration invalid. Gift Aid also cannot be claimed on donations that come with a significant benefit back to the donor beyond a minor token thank-you (for example, paying for a raffle ticket, an auction item, or a membership that primarily provides a personal benefit, rather than a genuine unconditional gift), nor on donations made on behalf of someone else using a collection where individual donors can't be identified (which is precisely the gap GASDS exists to fill for small cash gifts).