Charitable giving across two tax systems: how to get relief in Britain and America

Figures relate to tax year 2025-26 (UK) / 2025 (US)

Charitable giving looks simple until you pay tax in two countries. A donation to a British charity earns Gift Aid, yet the IRS usually gives you nothing for it. Give to an American charity instead, and HMRC usually gives you nothing back.

The good news is that relief on both sides is possible. So this guide explains how each system rewards donations, where the treaty helps, and how dual-qualified charities let one gift count twice.

Key takeaways

• Gift Aid adds 25% to donations from UK taxpayers to British charities.
• Higher-rate UK taxpayers can claim extra relief on their Self Assessment return.
• US deductions generally require an American charity, and only help if you itemise.
• The treaty allows a limited US deduction for gifts to UK charities against UK income.
• Dual-qualified charities and donor funds can secure relief in both countries.

What is Gift Aid?

Gift Aid is the UK scheme that lets a charity reclaim basic-rate tax on your donation. Give £100 and the charity receives £125. You simply confirm that you pay enough UK income tax or capital gains tax to cover the amount reclaimed.

Higher-rate and additional-rate taxpayers get more. According to the GOV.UK guidance on Gift Aid (opens in a new tab), you claim the difference between your rate and the basic rate through Self Assessment. On a £100 gift, a higher-rate taxpayer reclaims £25 personally.

Each tax system rewards generosity toward its own charities. Relief in both takes a deliberate choice about where the money goes.

How does the US treat charitable giving?

America allows a deduction for gifts to qualifying US charities, usually limited to a percentage of your income. Per the IRS guidance on charitable contributions (opens in a new tab), gifts to foreign charities are generally not deductible under domestic law.

There is a second hurdle for many Americans abroad. The deduction only helps if you itemise rather than take the standard deduction, which is $15,750 for a single filer in 2025. Most people in Britain take the standard deduction and see no benefit from giving at all.

From 2026, US law adds a modest deduction for non-itemisers, capped at $1,000 for single filers. It still applies only to gifts to qualifying US charities, so British donations remain outside it.

Does the treaty help with British charities?

Partly. The US UK treaty allows a US citizen or resident to deduct gifts to British charities, but only against income sourced in the UK. The usual American percentage limits still apply to that UK-source income.

For an American living and working in Britain, most income is UK-sourced, so the limit rarely bites. The bigger practical problem is the standard deduction. A treaty deduction only helps if your itemised deductions exceed that threshold in the first place.

Claiming it also means disclosing a treaty position. Keep receipts showing the charity's registration and the amount, because the IRS may ask to see them.

What are dual-qualified charities?

They are organisations registered in both countries, so a single donation can earn Gift Aid in Britain and a deduction in America. Many British universities, museums and large charities run American arms for exactly this purpose.

Donor-advised funds offer a wider route. Some funds operate UK and US entities side by side, letting you give through the one that matches your tax position and then recommend grants to charities in either country.

Check the arrangement before giving, not afterwards. The relief depends on which entity receives the money, so a gift sent to the wrong arm can lose the benefit you intended.

Is it worth planning at all?

Yes, if you give more than a few hundred pounds a year. Small gifts rarely change your tax. Larger or regular charitable giving can, and the gap between routes adds up quickly over a decade.

Start with the simple wins. Tick the Gift Aid box on every British donation. Claim higher-rate relief if you pay it. Those two steps alone recover a quarter or more of each gift.

Then look at the bigger choices. Where you give, how you give and when you give all matter more once the sums grow.

Timing your gifts

Timing can lift the value of charitable giving a great deal. Some donors bunch several years of gifts into one year. That can push US deductions above the standard deduction for that year. In the years between, they take the standard deduction as normal.

Britain works differently. Gift Aid relief runs year by year. You can even treat a gift as made in the previous tax year, if you make it before you file that return.

So the best timing for one country is not always the best for the other. Plan the calendar with both returns in view.

Giving through payroll

Payroll giving takes donations from your salary before income tax. You get relief at your top rate straight away, with no claim to make.

The US side is less generous. The gift reduces nothing on your US return unless it reaches a qualifying American charity and you itemise. For most people that makes payroll giving a purely British benefit.

Can you give to a US charity while living in Britain?

You can, but Britain gives no relief on it in most cases. Gift Aid only applies to charities that HMRC recognises. An American charity with no UK registration falls outside that, however worthy its cause.

The US deduction then depends on itemising. For an American who itemises because of US income or a mortgage, a direct gift to an American charity can still make sense.

Otherwise, look for the charity’s British partner, or give through a fund with a UK arm. The cause stays the same, and the relief improves.

How do you plan charitable giving properly?

Start with your tax position in each country, because that decides where relief is worth having. A higher-rate UK taxpayer who takes the US standard deduction needs a very different plan from someone who itemises. Then work through these steps:

1. Confirm your UK tax rate and whether you pay enough tax to support Gift Aid.
2. Check whether you itemise US deductions or take the standard deduction.
3. Ask your chosen charity whether it has a registered American arm.
4. Consider a donor fund with UK and US entities for regular giving.
5. Complete the Gift Aid declaration for each British donation.
6. Keep receipts showing the charity's registration in each country.
7. Claim higher-rate relief and any US deduction on the right returns.

A worked example

Take an illustrative example. An American doctor in Bristol pays UK higher-rate tax. Her charitable giving totals £5,000 a year, all to her former university. She takes the US standard deduction, so her gifts earn nothing in America.

Given directly, the university receives £6,250 through Gift Aid, and she reclaims £1,250 on her Self Assessment return. Her US return shows no benefit, and none is lost, because she would not itemise anyway.

Her colleague, who itemises because of a large US mortgage, gives through the university's American foundation instead. He gains a US deduction, while the foundation passes the money to the same university.

What about gifts of shares or property?

Both countries reward gifts of appreciated assets, but in different ways. Britain gives income tax relief on gifts of listed shares and land to charity, and no capital gains tax arises on the transfer.

America can allow a deduction for the full market value of long-held assets given to a US charity, again without tax on the gain. The rules differ in detail, so an asset gift needs checking against both systems before the transfer.

Does giving affect inheritance tax?

Yes, often significantly. Gifts to UK charities are exempt from inheritance tax, and leaving at least 10% of the net estate to charity reduces the UK rate on the rest from 40% to 36%.

US estate tax has its own charitable deduction for gifts to qualifying organisations. Our guide to US UK inheritance tax explains how the two estate systems interact, which matters for any legacy gift.

Mistakes and traps in charitable giving

Most lost relief comes from giving in the obvious way without checking both systems. These are the errors we see most often:

• Claiming Gift Aid without paying enough UK tax to cover it.
• Expecting a US deduction for gifts to a British charity under domestic rules.
• Forgetting that the treaty deduction only helps if you itemise.
• Sending money to the UK arm of a charity when the US arm would earn relief.
• Missing higher-rate relief on the Self Assessment return.
• Giving appreciated assets without checking both countries' rules first.

The High Income Child Benefit Charge adds another angle. Gift Aid donations reduce adjusted net income, which can bring a household below the threshold, as our guide to the High Income Child Benefit Charge explains.

How US UK Tax Accountants helps

We map your charitable giving against both returns and identify where relief is actually available. Our treaty relief service covers the treaty deduction, Gift Aid claims and the itemised deduction decision together.

In our practice the most valuable change is often the route rather than the amount. We agree a fixed fee in writing before any work begins, so the advice never costs more than it saves.

Give with both systems in mind

If charitable giving is part of your plans, a short review makes sure each donation earns the relief it can. Tell us where you give and how much. You can book a consultation and hear back within one working day.

Last reviewed 14 September 2026 by the US UK Tax Accountants Tax Team. This article is general information, not personal tax advice — speak to a qualified US/UK tax adviser about your own position.