The dividend allowance is the amount of dividend income a person can receive each year before dividend tax applies. For 2026-27 it is 500 GBP (HMRC), and dividends above it are taxed at rates that depend on the taxpayer's income band.
In one line: The dividend allowance is the slice of dividend income taxed at 0% before dividend tax begins.
How the dividend allowance works
The allowance sits within total income but is taxed at 0%, so it uses up part of the relevant band. Dividends above the allowance are taxed at the dividend rate for the taxpayer's band, not the ordinary income rate.
An investor receiving 2,000 GBP in dividends in 2026-27 uses the 500 GBP (HMRC) allowance, leaving 1,500 GBP taxable. A basic-rate taxpayer then pays the basic dividend rate on that 1,500 GBP rather than the 20% ordinary rate.
Dividends held inside an ISA are outside this system entirely, because income within an ISA is free of UK tax regardless of the allowance.
Dividend allowance vs personal allowance
The personal allowance covers all income types and shelters the first slice of total income. The dividend allowance is narrower, applying only to dividends and taxing them at 0% within whichever band they fall.
The two can both apply: dividends can be covered first by any unused personal allowance, then by the dividend allowance, before dividend tax is charged on the remainder.
Primary source: GOV.UK: Tax on dividends