Dividends are taxed differently from salary, and the mistake most calculators make is treating them in isolation. In reality, dividends sit on top of your other income. HMRC first counts your salary and other earnings, then stacks your dividends above them — and it's where that stacked total lands that decides the rate.
The dividend rates for 2026/27 are:
The £500 dividend allowance is one of the most misunderstood parts of the system, and several competitor calculators get it wrong. It is not a deduction that reduces your taxable income. It is a nil-rate band: the first £500 of dividends is taxed at 0%, but those £500 still occupy band space and still count toward deciding which rate your remaining dividends pay. So the allowance shrinks your bill, but it doesn't push the rest of your income down into a lower band the way a genuine deduction (like a pension contribution) would.
On top of that, if your salary doesn't use all of your £12,570 Personal Allowance, the unused slice shelters the first part of your dividends before the £500 allowance even applies — which is exactly the kind of interaction a single-tax calculator can't see.
Take a company director on a £45,000 salary who draws £12,000 in dividends. The salary uses the full Personal Allowance and most of the basic-rate band. The £12,000 of dividends stacks on top: the first £500 is covered by the dividend allowance (0%), a slice fills the rest of the basic-rate band at 10.75%, and the remainder crosses £50,270 into the higher-rate band at 35.75%. The calculator above splits this out precisely, because it runs the whole position at once rather than assuming every dividend is taxed at a single rate.
Dividends are only one slice of your tax picture.
See your complete tax position →