Hundred Summers

Dividend tax calculator: the top-slice arithmetic

The £500 allowance, then the April-2026 rates of 10.75% / 35.75% / 39.35%, with dividends stacked as the top slice of your income and the personal-allowance taper applied when total income crosses £100,000. The same function the Hundred Summers engine charges on unwrapped holdings every projected year. Your figures never leave your browser.

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Worked example

Computed when this page was built by the same engine that runs the calculator above, so the figures below and the live tool can never disagree. Change any input above to see your own.

Inputs
Other taxable income£35,000
Dividends£10,000
Results
Dividend tax£1,021
Effective rate on the dividends10.2%
Kept£8,979

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Or answer it with everything else: the full Hundred Summers plan connects your pay, pensions, savings, property, tax and spending year by year, and stress-tests them across 500 simulated market histories.

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The stacking rule

Dividends are taxed as the top slice of income: your salary, pension and rent fill the bands first, and dividends land wherever the stack ends. A £10,000 dividend costs £1,021 for someone on £30,000 and £3,396 for someone on £60,000: same dividend, different band. The allowance has shrunk from £5,000 (2017) to £500, pulling ordinary investors into self-assessment.

The escape routes are structural, not clever: ISAs and pensions pay no dividend tax at all, and moving £20,000 a year of existing holdings into an ISA ("bed and ISA"; mind the CGT on the sale) steadily shelters a portfolio. The full Hundred Summers plan charges this exact function on your unwrapped holdings in every projected year, and its insights rail totals what unwrapped money costs across your whole plan.

Education, not advice. Fund distributions (interest vs dividend) and REIT payments have their own treatments this page simplifies. For a personal recommendation speak to an FCA-regulated financial adviser; free impartial guidance is available from MoneyHelper.