Updated for 2026/27 · Based on HMRC Rates · Confirmed Statutory Values

Budget 2026 Calculator UK | Better or worse off?

Updated for 2026/27: Our calculations are based on HMRC-published rates and confirmed Treasury announcements ahead of the 28 October Budget. Read our calculation methodology →
Last verified: 6 October 2026

Are you going to be better or worse off after the Autumn Budget 2026? Enter your details below to instantly calculate the impact of both confirmed and rumoured tax changes on your personal finances.

Key Budget 2026 Facts & Timeline

  • Budget Day: Wednesday 28 October 2026 (~12:30pm GMT speech).
  • Confirmed: Cash ISA cap drops to £12,000 for under-65s (effective April 2027; over-65s keep £20,000).
  • Confirmed: Savings interest and rental income tax rates rise by +2pp (April 2027: 22%/42%/47%).
  • Confirmed: Most unused defined contribution pension funds brought into Inheritance Tax (April 2027).
  • Rumoured: Potential £100,000 cap on tax-free pension lump sums and flat 30% pension tax relief.

Understanding the Autumn Budget 2026

The upcoming budget introduces significant changes aimed at rebalancing public finances. While some measures like the Cash ISA cap reduction and the increase in savings and rental tax rates are confirmed for April 2027, many others remain rumours. Our calculator allows you to toggle these rumoured measures to stress-test your finances against potential worst-case scenarios.

For a detailed look at how these changes affect your standard tax code, see our Take-Home Pay Calculator, or if you receive dividends, our Dividend Tax Calculator.

Frequently Asked Questions

Is the pensions triple lock being scrapped? Announced — planned from April 2030

At the Labour conference on 29 Sept 2026 the Prime Minister announced the triple lock will become a "double lock" from April 2030 — the state pension rising each year by the higher of inflation or 2.5%, with the earnings link removed — to help fund a National Care Service. It is conditional on Labour winning the next general election and the triple lock stays unchanged for this parliament. It does not change 2026/27 better/worse-off maths.

Will there be a windfall tax on banks in the Budget? Rumoured — not confirmed

The Chancellor met Britain's biggest bank bosses on 6 Oct 2026 (Times) and left them "none the wiser" — no decision announced. City speculation of a levy on bank profits persists ahead of 28 Oct, with campaigners suggesting up to £19bn could be raised from the big four (Positive Money). This is corporate tax: it would not change personal better/worse-off results. Treat as rumour until Budget day.

Why did I get a second HMRC Simple Assessment letter?

HMRC is issuing ~1.8m Simple Assessment (PA302) letters for 2025/26. A second tranche lands October–December 2026 covering bank and building-society interest — and it can repeat figures from your first letter even if already paid. HMRC advises subtracting tax already paid from the second figure to work out what you genuinely owe, so you don't pay twice. (Sources: Grimsby Telegraph 29 Sept 2026; ICAEW.)

Will I be worse off after the Autumn Budget 2026?

Whether you are better or worse off depends on your income sources and asset mix. Higher earners, landlords facing +2pp property tax rates from April 2027, savers exceeding their Personal Savings Allowance, and those with uninvested cash in Stocks and Shares ISAs will face higher liabilities, while standard PAYE employees with modest savings will primarily feel the continuing freeze on income tax thresholds.

When is the Autumn Budget 2026 and what time is the speech? Confirmed

The Autumn Budget 2026 will be delivered on Wednesday 28 October 2026. The Chancellor's speech to Parliament traditionally begins immediately after Prime Minister's Questions at approximately 12:30pm GMT and lasts around an hour.

What is the new Cash ISA limit from April 2027? Confirmed

From 6 April 2027, the annual contribution cap for Cash ISAs will drop from £20,000 to £12,000 for adults under the age of 65. The overall statutory ISA allowance remains £20,000, meaning the remaining £8,000 must be invested in Stocks & Shares ISAs, Innovative Finance ISAs, or Lifetime ISAs.

Does the £12,000 Cash ISA cap apply if I'm over 65? Confirmed

No. Individuals aged 65 and over will retain the full £20,000 annual allowance for Cash ISAs after April 2027, exempting pensioners and older savers from the £12,000 restriction.

How much tax will I pay on savings interest from April 2027? Confirmed

From 6 April 2027, tax rates on taxable savings interest rise by 2 percentage points. Basic-rate taxpayers will pay 22% (up from 20%), higher-rate taxpayers will pay 42% (up from 40%), and additional-rate taxpayers will pay 47% (up from 45%) on interest exceeding their allowance.

How much more tax will landlords pay on rental income from April 2027? Confirmed

From 6 April 2027, individual landlords will pay an extra 2 percentage points on net rental profits. The rates become 22% for basic-rate, 42% for higher-rate, and 47% for additional-rate taxpayers, costing higher-rate landlords an additional £200 for every £10,000 of net rental profit.

Will my pension be subject to inheritance tax from April 2027? Confirmed

Yes. From 6 April 2027, most unused defined contribution pension funds and death benefits will be included within the deceased's estate for Inheritance Tax (IHT) calculation purposes, removing their historic full exemption.

Could the 25% tax-free pension lump sum be cut to £100,000? Rumoured — not confirmed

Rumoured — not confirmed: Widespread speculation suggests the Chancellor may reduce the maximum tax-free Pension Commencement Lump Sum (PCLS) from the current statutory cap of £268,275 (25% of £1,073,100) down to approximately £100,000 to raise revenue.

Will pension tax relief be flattened to 30%? Rumoured — not confirmed

Rumoured — not confirmed: While replacing marginal rate pension tax relief (20%/40%/45%) with a flat 30% rate would boost basic-rate savers and raise billions from higher earners, implementing it poses severe administrative challenges for defined benefit and NHS public sector schemes.

What is the salary sacrifice pension cap from April 2029? Confirmed

Already enacted into law under the Finance Act, the statutory limit on National Insurance relief via employer salary sacrifice arrangements is set at £2,000 of relief per tax year, commencing from 6 April 2029. This is existing legislation, not a new Budget 2026 measure.