Charity finance calculators
Free tools built on the current Charity Commission and HMRC rules (England and Wales, 2026/27). Every figure is sourced and kept up to date.
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All 3 calculators run here on the page. Open the full page for a tool when you want the worked explanation, the FAQs and the sources behind the figure.
Gift Aid Calculator
Gift Aid adds 25p to every £1 donated by a UK taxpayer, at no cost to the donor. Enter a donation and the donor's tax band to see what the charity receives, what the donor can personally reclaim, and the true net cost of the gift.
The amount the donor actually gives (the net donation).
Scottish income tax bands differ slightly for donor relief; the charity's 25% claim is the same UK-wide.
The charity needs a valid Gift Aid declaration before it can claim. Claims go to HMRC through the Charities Online service, usually within a few weeks.
Independent Examination vs Audit Checker
The Charities Act sets clear gates. For financial years ending before 30 September 2026: independent examination once gross income passes £25,000, a qualified examiner and accruals accounts above £250,000, and a statutory audit above £1m income (or £250,000 income with assets over £3.26m). For financial years ending on or after 30 September 2026 the gates rise to £40,000, £500,000, and £1.5m income (or £500,000 income with assets over £5m). Enter your figures and financial year to see where your charity sits.
Total gross income for the financial year, before any expenditure.
The aggregate value of assets before deducting liabilities. Only relevant once income exceeds the accruals threshold (£250,000, or £500,000 for financial years ending on or after 30 September 2026).
Gross income exceeds £25,000, so independent examination is required. Below £250,000 any suitably experienced independent person can examine.
GASDS Small Donations Calculator
GASDS lets charities claim a 25% top-up on small cash and contactless donations of £30 or less, without Gift Aid declarations. The claim is capped at £8,000 of donations per tax year and limited to 10 times the donations you claim Gift Aid on. Enter your figures to see your top-up.
Total cash and contactless donations of £30 or less each, collected in the UK this tax year. Cheques, bank transfers and donations with Gift Aid declarations do not count.
The matching rule limits GASDS to 10 times the donations on which you claim Gift Aid in the same tax year.
Neither the £8,000 annual cap nor the matching rule limits this claim.
Prefer the full page? Open the gift aid calculator
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A calculator gives you the shape of the answer
What it cannot see is your reserves policy, your restricted funds, or how this year's income changes which scrutiny threshold you fall under next year. If you want your own figures checked, tell us about your charity and we will arrange a short introductory call.
Talk to a charity accountant