Your 2026–2027 UK Tax Timeline: Key Allowance Freezes and Rate Rises

Key Takeaways

• Income tax thresholds are frozen until 2031, so any pay rises until then could push workers into higher tax bands.
• Dividend tax rises will increase in April 2026 for those investing outside ISA allowances.
• Tax returns will move to a quarterly reporting schedule, even though the Jan. 31 final deadline will remain.

Taxes are going up by nearly £30 billion by the end of this decade. That much was clear from November’s Autumn Budget, but the drama around this politically charged move masks a more complex timeline. Plenty of the decisions made by the chancellor, Rachel Reeves, on Nov. 26, won’t occur until 2027. Those include the major changes to the cash allowance within ISA wrappers, increases to savings tax and changes to inheritance tax that will affect pension savers.

Here’s what to expect in the coming months:

Income Tax Thresholds Are Frozen

Taxpayers naturally focus on April, which will be the start of the 2026-2027 tax year. Here taxpayers will see no changes until April 2031 because a previous freeze in allowances has been extended.

UK income tax is divided into three bands in England, Wales and Northern Ireland:

• The basic rate is 20%, paid on earnings between £12,571 and £50,270. There is no tax to pay on earnings up to £12,570, which is known as the personal allowance.
• The higher rate of 40% is paid on earnings between £50,271 and £125,140.
• The additional rate of 45% is charged on earnings above £125,140.

Despite speculation ahead of the Autumn Budget of an increase, the income tax rates have been left at 20%, 40% and 45%.

Dividend Tax Rates Are Increasing

One change that’s expected to impact investors’ tax strategies from next year concerns the taxation of dividend income.

From April 2026, income tax rates on dividend income will rise to 10.75% from 8.75% for those paying the basic rate of tax, and to 35.75% from 33.75% for those on the higher rate. The additional rate will stay the same at 39.35%.

“This move is set to affect savers, investors, business owners, and landlords, prompting many to reassess their financial strategies,” says Nji Lorimer, head of UK domestic wealth planning at UBP.

“With capital gains tax rates left unchanged, investors may now be encouraged to scrutinize how gains are generated within their portfolios. Savers, too, might consider shifting cash holdings into more tax-efficient structures, such as ISAs or offshore bonds, to mitigate the impact of these changes.”

Mark Preskett, senior portfolio manager at Morningstar Wealth, said the UK dividend tax hike is “a clear disincentive for stocks,” especially given the UK stock market’s strong dividend-paying history.

Are ISAs Changing in 2026?

One change made in the Autumn Budget was a decrease in the cash ISA allowance from £20,000 to £12,000 for those under 65.

But this change will take effect in April 2027. For now it’s business as usual.

From April 2026, adult savers will have a reset £20,000 allowance, and those putting money into junior ISAs will have the usual £9,000 allowance. The lifetime ISA allowance will reset at £4,000, but this is part of the £20,000 allowance for adults.

What About Savings Tax?

The most significant changes to savings outside the ISA regime are occurring in 2027. In tandem with reduced cash ISA allowances, the savings interest accrued outside of this system will be subject to higher tax rates.

Basic-rate taxpayers still have an allowance of up to £1,000 before they pay tax, but from the 2027/2028 tax year, the basic rate of savings will be increased by two percentage points to 22%, while the higher rate will be increased by two percentage points to 42%. The savings additional rate will be increased by two percentage points to 47%.

Will I Have to File a Self-Assessment Tax Return in 2026?

At this time of year, many self-employed workers and their accountants are focused on the self-assessment deadline of Jan. 31. This is the annual deadline for filing accounts for the previous tax year. HMRC then calculates tax liabilities.

But a change is coming next year as the government introduces the Making Tax Digital system from April 2026. This involves mandatory quarterly reporting of income and expenses. Still, the Jan. 31 deadline will remain circled on calendars: This is the date for a “final declaration” of an individual’s tax affairs.

Among those affected are sole traders and landlords. If they earn more then £50,000 from their activities, they will be required to participate in this new system, though the government has said it will not apply late submission penalties during the first year of the system: 2026-2027. Instead, the new penalty regime will commence from April 6, 2027.

UK Financial Advisors Will Be Busy in 2026 and 2027

The main takeaway from the Autumn Budget is that savers and investors must navigate some relatively complex tax changes over multiple years. One such change involves private pensions attracting inheritance tax from April 2027, a decision announced in autumn 2024. April 2028 will see the “mansion tax” introduced for higher-value properties. And salary sacrifice limits for pensions will be introduced in April 2029.

So it’s going to be a busy few years for IFAs.

“Clients need more help than ever as personal finances become increasingly complex and will be looking to their financial advisors to guide them through these changes and avoid costly mistakes with long-term planning,” says Steve Owen, head of proposition at Morningstar Wealth.

“While these changes can be frustrating and disrupt existing plans, advisors have a great opportunity to demonstrate their value and help clients in these uncertain times.”

What Other Personal Finance Changes Will Take Place in April 2026?

Several other changes will take place to taxation and spending from April.

• The UK state pension will rise by 4.8% in April 2026, as confirmed by the chancellor, Rachel Reeves, in the budget.
• The National Living Wage will rise.
• Venture capital trust (VCT) income tax relief will fall to 20% from 30%, which will come into effect from April next year.
• The employers’ national insurance contribution (NIC) threshold will be frozen at £5,000, and the NIC upper earnings limit will be frozen at £50,270 until 2031.
• Corporation tax late filing penalties will double.
• The main capital gains tax rates stay at 18% and 24% for basic and higher/additional rate taxpayers.
• The CGT annual tax-exempt amount resets at £3,000 in April.
• The CGT rate on disposals qualifying for Business Asset Disposal Relief will increase to 18% from 14%.
• From April 2026, remote gaming duty will increase to 40% from 21%.
• From April 2026, inheritance tax business property relief will be restricted to 50% for shares quoted on recognized stock exchanges such as the Alternative Investment Market.
• IHT nil-rate bands, including the combined allowance for the 100% rate of agricultural property relief and business property relief of £1 million, will now stay fixed for an additional year, ending April 2031