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What The Dividend Tax Calculator Works Out
- Tax-free dividends: the GBP 500 dividend allowance plus any personal allowance not used by your other income. The allowance is a nil-rate band rather than a deduction, so those GBP 500 still occupy part of your tax band.
- Dividend tax due: dividends sit on top of other income and are taxed at 10.75% in the basic rate band, 35.75% in the higher band and 39.35% above GBP 125,140 of total income. On a GBP 30,000 salary with GBP 10,000 of dividends everything sits in the basic band and the bill is about GBP 1,021.
- Dividends kept: dividends minus the tax. Dividends avoid National Insurance, which is why company directors still usually take a salary around the GBP 12,570 personal allowance with dividends on top, though the 2026 rate rise narrowed the gap.
- Stacking order: because dividends are taxed last, a pay rise can push dividends that were taxed at 10.75% into the 35.75% band, a 25p per pound jump. The personal allowance also tapers away above GBP 100,000 of total income.
- Dividends inside an ISA (advanced): excluded from tax entirely. The card shows what the same dividends would have cost outside the wrapper, which is the whole case for using the GBP 20,000 annual ISA allowance for dividend portfolios.
- Pension contributions and Gift Aid (advanced): gross personal pension payments and Gift Aid donations (grossed up by 25%) extend the basic rate band and reduce income for the allowance taper, so they can pull dividends back down from 35.75% to 10.75%.
- Effective rate (advanced): total dividend tax as a share of all dividends received. Usually well below the headline rate because of the allowances.
- Marginal rate on the next GBP 1,000 (advanced): what one more GBP 1,000 of dividends would cost, which exposes the jump from 10.75% to 35.75% and the effective 60%-plus zone where the personal allowance tapers.
- Headroom before higher rate (advanced): how much more you could pay yourself in dividends before any of it is taxed at 35.75%. Directors use this to set the year's dividend without tipping into the higher band.
- Reporting: dividends over the allowance are declared through self assessment or a PAYE code adjustment. Not financial advice.
Source and further reading: GOV.UK (HMRC): tax on dividends.