How to claim Gift Aid for a charity in 2026 (and make sure you don’t leave money on the table)

"An estimated £560m of Gift Aid relief goes unclaimed every year due to the complexities for charities and donors."

- Charities Aid Foundation

According to Gov.uk, UK charities received an estimated £1.7 billion in Gift Aid in the year to April 2025 - up about 7% on the previous tax year, showing the scheme’s continued importance to sector income.

But, around £560 million still goes unclaimed each year, often due to incomplete declarations, changing donation channels, or poor data hygiene - and that’s potential programme funding left behind.

Research from organisations like the Charities Aid Foundation (CAF) suggests a quarter of donors don’t always use Gift Aid, even when eligible, because “it’s too much effort” or the option isn’t presented clearly enough.

Taken together, those statistics make one thing clear: claiming Gift Aid is an opportunity maximised by some charities - and completely missed by others.

Why Gift Aid still slips away (and what you can do about it)

Sector voices have been candid about the barriers charities face:

“Gift Aid is extremely valuable … but it is underused by donors and can be complicated for charities to claim. When an eligible taxpayer donates and forgets to tick the box, the charity misses out.”

- Mark Greer, Managing Director, Charities Aid Foundation

And the complexity isn’t just anecdotal: despite its simplicity in principle - reclaiming 25% on qualifying gifts - the practical process requires clean data, valid declarations, and organisational grip. Without that, a significant slice of potential income evaporates.

Most experienced fundraisers know the basics, but let’s turn good intentions into consistent results:

Capture valid Gift Aid declarations at source

A valid declaration must be linked to the donor before a claim can be made. If donors aren’t prompted clearly at point of donation, or if data entry is inconsistent, claims will fail.

Standardised online forms and verbal declaration workflows (backed by good data capture software) can cut the friction dramatically.

Use a system built for charities

Manual records are where errors hide - I know, I worked at a charity that claimed Gift Aid manually for years! That’s why an increasing number of teams are exploring Gift Aid software for charities that:

• securely stores declarations and donor tax status,
• flags eligible donations automatically,
• and prepares HMRC-ready claims in clicks rather than hours.

For example, a CRM like Donorfy integrate Gift Aid directly into the income workflow, so your team isn’t wrestling with data exports or third-party templates for every claim cycle.

Run regular “Gift Aid health checks”

Donors change addresses, donate across multiple channels, or give again years later without a fresh declaration. Setting a calendar rhythm - quarterly or monthly - to cleanse your data can unlock hidden claim opportunities.

Understand and embrace all eligible income streams

When people think about how to claim Gift Aid for a charity, they often picture a simple one-off donation. But Gift Aid eligibility stretches further than many charities fully optimise.

With the right processes and strong Gift Aid software for charities, you can confidently claim on:

• Recurring donations – ensuring declarations stay valid and linked over time.
• Charity shop sales (under the Retail Gift Aid Scheme where structured correctly).
• Online donations and micropayments – where clean data capture is essential.
• Sponsored events and peer-to-peer fundraising – capturing declarations from individual sponsors, not just participants.
• Gift Aid Small Donations Scheme (GASDS) – unlocking additional income from small cash or contactless gifts, even when donors haven’t completed a declaration.

Each income type has slightly different rules. If your systems do not reflect those nuances, claimable income can quietly slip away.

Run a backdated Gift Aid audit (there’s likely money waiting)

HMRC allows charities to claim Gift Aid on eligible donations made in the last four years. Four. Whole. Years.

Which means if your processes haven’t always been watertight, there may be a quiet pot of reclaimable income sitting in your historic data.

Backdated claims often surface when:

• donors ticked Gift Aid on one form but not another
• legacy spreadsheets weren’t merged properly
• shop or event income wasn’t linked correctly to supporter records
• declarations were valid but never connected to earlier donations

This is where good Gift Aid software for charities earns its keep.

Instead of manually combing through years of spreadsheets, a CRM allows you to:

• run reports on historic eligible donations
• match older gifts to valid declarations
• identify donors who gave previously but now have a valid declaration on file
• generate retrospective claim batches safely and compliantly

For some charities, a focused “Gift Aid sweep” has uncovered tens of thousands in missed income. It is not glamorous work. It is, however, incredibly satisfying.

Think of it less as admin and more as a mini fundraising appeal you forgot you ran!

At its simplest: the right CRM becomes your Gift Aid HQ!

Donorfy, for example:

• automates the inclusion of eligible donations for Gift Aid.
• lets charities manage declarations and resolve issues quickly.
• provides reports that make unclaimed Gift Aid visible.
• integrates with HMRC to submit claims smoothly.

By turning manual toil into automated flows, you can spend time cultivating donors, and less fighting spreadsheets (yes, post code column, we're talking to you.)

It’s one thing to talk theory, but charities are reporting practical wins:

Teams have reduced Gift Aid admin time significantly by switching from manual spreadsheets to CRM workflows, freeing up hours every claim period.

In fact, some organisations uncover tens of thousands in unclaimed Gift Aid simply by tightening donor data and running regular checks.

• Before Donorfy, the Youth Talk team hadn’t submitted a Gift Aid claim in over two years. Now, with income management features, they made a claim for £10,000 off the bat. 
• Gift Aid claims are submitted monthly with greater confidence at the Roman Catholic Archdiocese of Southwark, thanks to the clarity of pre‑claim data checks.

• Using Donorfy helped Brake reclaim £5,000 in backdated Gift Aid, a significant boost for the charity.

"Getting the Gift Aid sorted felt like a windfall. Donorfy’s made it possible to organise our claims, and with the integration we’re able to keep them up-to-date.”

- Amy Walker, Operations Manager, Brake

Gift Aid isn’t an add-on, it’s a core income lever for UK charities.

But with changing giving behaviours, new donation channels, and rising demand for resilience in the sector, the old adage applies: you can’t claim what you can’t see. That’s why:

• Getting declarations right at source matters.
• Clean data unlocks more claims.
• Software that understands charities turns potential into performance.

Put simply, understanding how to claim Gift Aid for a charity in 2026 means embedding it into your systems and workflows - with the right technology and the right processes - so you’re always capturing what you’re entitled to.