Dividend Tax Is Rising Again in 2026/27 - Why Your ISA Just Got More Valuable

If you hold shares or funds outside an ISA, April 2026 brought a quiet but meaningful tax rise. Dividend tax rates went up by 2 percentage points across most bands - on top of a dividend allowance that’s already been cut repeatedly over the past few years. Here’s what changed, and why it makes using your ISA allowance more valuable than ever.

What actually changed

From 6 April 2026, tax on dividend income held outside an ISA or pension rose as follows:

• Basic rate: up from 8.75% to 10.75%
• Higher rate: up from 33.75% to 35.75%
• Additional rate: unchanged at 39.35%

This was announced at the Autumn Budget on 26 November 2025 and took effect at the start of the 2026/27 tax year. The dividend allowance - the amount of dividend income you can receive tax-free before these rates apply - remains at £500 for 2026/27, having been cut from £2,000 as recently as 2022/23.

Why this matters more than the numbers suggest

A 2-percentage-point rise sounds modest, but combined with a dividend allowance that’s a quarter of what it was four years ago, more investors are paying dividend tax on more of their income than at any point in recent memory. If you hold shares, investment trusts, or funds outside an ISA and receive dividend income above £500 a year, you’re very likely paying more tax on it from this tax year than last.

A worked example

Say you’re a higher-rate taxpayer with £5,000 of dividend income from shares held outside an ISA:

• The first £500 is tax-free (the dividend allowance).
• The remaining £4,500 is taxed at 35.75% (up from 33.75% in 2025/26) - that’s £1,608.75, compared with £1,518.75 the previous year.
• That’s an extra £90 in tax on the same £5,000 of dividend income, purely from the rate change - before accounting for any further erosion if the allowance is cut again in future.

Why the ISA wrapper avoids all of this

None of this applies to dividends, interest, or capital gains earned inside a Stocks & Shares ISA. The entire £20,000 annual ISA allowance for 2026/27 can hold shares, funds, and investment trusts exactly like a general investment account - but everything inside it is completely free of dividend tax, Income Tax on interest, and Capital Gains Tax, indefinitely.

This connects to another 2026/27 squeeze: Capital Gains Tax

It isn’t just dividends. The annual Capital Gains Tax exemption - the amount of gains you can make outside an ISA each year before CGT applies - has also been cut sharply in recent years and now stands at just £3,000 for 2026/27, down from £12,300 as recently as 2022/23. Investors holding shares or funds outside an ISA are now more exposed to both dividend tax and CGT than at almost any point since ISAs were introduced.

What this means practically

If you hold investments outside an ISA and haven’t used your full £20,000 ISA allowance this tax year, moving future contributions - and potentially existing holdings, via a process sometimes called ‘Bed and ISA’ - into an ISA wrapper is now more valuable than it was even a year or two ago. This is especially true for anyone holding income-generating investments like dividend-paying shares, investment trusts, or bond funds, where the tax drag outside an ISA compounds every single year.

The bottom line

None of these changes affect money already inside an ISA - that protection is permanent for as long as the money stays wrapped. But for new investing, and for anyone still holding meaningful sums outside an ISA, the gap between investing inside and outside the wrapper has widened again this tax year.