Rachel Reeve Ca h ISA Change : £12,000 Limit From 2027

If you’ve been saving in a cash ISA thinking the £20,000 limit was safe, you’re not alone — and that’s exactly what changed in the Autumn Budget 2025. Chancellor Rachel Reeves announced the cash ISA allowance will drop to £12,000 from April 2027, a 40% cut that caught many savers off guard. Here’s what the change means for your savings, whether you’re a basic-rate taxpayer or caught in the 60% tax trap, and how to adjust before the new rules take effect.

Current cash ISA allowance: £20,000 per tax year ·
New cash ISA allowance (from April 2027): £12,000 ·
Reduction: 40% ·
Announced by: Chancellor Rachel Reeves in Autumn Budget 2025 ·
Effective date: April 2027 ·
Overall ISA allowance (inc. stocks & shares): Remains £20,000

The snapshot above shows a clear pattern: the cut targets younger and middle-aged savers while protecting pensioners. Here are the exact figures from the announcement.

Is Rachel Reeves going to reduce the ISA allowance?

Yes — the reduction is confirmed. Rachel Reeves announced in the Autumn Budget on 26 November 2025 that the cash ISA allowance will drop from £20,000 to £12,000 from 6 April 2027 (MoneySavingExpert (consumer finance authority)). The overall ISA allowance remains £20,000, meaning you can still put up to £20,000 into stocks and shares ISAs or innovative finance ISAs.

When will the cash ISA limit change?

• Currently: £20,000 per tax year (until 5 April 2027)
• From 6 April 2027: £12,000 per tax year for under-65s (MoneyWeek (personal finance publication))
• Over-65s unaffected — they keep the £20,000 limit (MoneySavingExpert)

Why is Rachel Reeves cutting the cash ISA limit?

The government’s stated aim is to “encourage more investment in stocks and shares ISAs” (MoneySavingExpert). By reducing the cash ISA sub-limit, the Treasury hopes to channel more savings into equities, which historically offer higher returns over the long term. Critics say the move penalises cautious savers who rely on cash ISAs for security.

What are the new rules for cash ISA?

The mechanics are straightforward but come with important nuances. Here’s what changes from April 2027.

What is the new cash ISA allowance from April 2027?

• Under-65s: max £12,000 per tax year in cash ISAs (MoneySavingExpert)
• Over-65s: still up to £20,000 per tax year (MoneyWeek)
• The £12,000 limit is per person, not per account (HMRC (UK tax authority))
• Existing cash ISA savings built up before 2027 are unaffected (MoneySavingExpert)

Does the change affect stocks and shares ISAs?

No. The stocks and shares ISA allowance remains £20,000 (MoneySavingExpert). Innovative finance ISAs also stay at £20,000. However, from April 2027 transfers from stocks and shares ISAs or innovative finance ISAs into cash ISAs will no longer be allowed (MoneySavingExpert).

Are cash ISAs still worth it?

That depends on your tax bracket and how much you save. For basic-rate taxpayers with modest cash savings, the £12,000 limit may still be adequate. For higher earners, the calculus shifts.

What does Martin Lewis say about cash ISAs?

“It’s the wrong move,” MoneySavingExpert founder Martin Lewis said of the cut. “Cash ISAs are a bedrock for many savers, and reducing the limit won’t magically make them invest more — it may just make them pay more tax.” (MoneySavingExpert)

Lewis’s warning highlights the core issue: if your savings interest exceeds the personal savings allowance (£1,000 for basic-rate, £500 for higher-rate taxpayers, and zero for additional-rate), a cash ISA’s tax-free wrapper becomes essential. The £12,000 limit still protects up to that amount from tax, but for larger cash piles, the tax benefit shrinks.

Should I switch to a stocks and shares ISA?

There’s no one-size-fits-all answer. A stocks and shares ISA can offer higher long-term returns but comes with market risk. For amounts above £12,000, it may be the only way to keep all your savings inside the £20,000 tax-free wrapper. Financial advisors recommend reviewing your risk tolerance and time horizon before switching (HMRC guidance).

Which is better, cash ISA or savings account?

This isn’t a static comparison — the answer changes with your savings level and tax status. The table below lays out the trade-offs after the 2027 change.

What are the tax implications of savings accounts?

Savings accounts pay interest that is taxable. The personal savings allowance lets basic-rate taxpayers earn up to £1,000 tax-free, higher-rate £500, and additional-rate £0. Any interest above that is taxed at your income tax rate. Cash ISAs shield all interest from tax, making them valuable once you exceed the allowance.

What are the best cash ISA rates currently?

Rates vary. As of late 2025, the top easy-access cash ISAs pay around 5% AER. Some fixed-rate ISAs offer slightly more. Compare these with high-interest savings accounts that can reach 7% on regular saver accounts — but remember tax may eat into those returns.

The pattern: tax sheltering gets more valuable the more you earn and save. For basic-rate savers with less than £12,000 in cash, a cash ISA may still be simpler. For higher earners, a stocks and shares ISA could offer better long-term growth.

What is the 60% trap?

UK earners with income between £100,000 and £125,140 face an effective 60% marginal tax rate because the personal allowance is gradually withdrawn. This band is known as the 60% trap.

How does the 60% trap work?

For every £2 earned above £100,000, you lose £1 of your personal allowance. The loss adds 20% to your marginal rate, bringing it to 60% for basic-rate taxpayers and higher for additional-rate earners. The withdrawal ends at £125,140, after which the allowance is zero.

How to avoid the 60% tax trap with ISA contributions?

Contributing to a pension reduces your adjusted net income, which can keep you below the £100,000 threshold. ISAs do not reduce taxable income directly, but they help you shelter savings growth from tax. The cash ISA cut limits this shelter slightly, so pension contributions become even more important for high earners.

Savers should review the full details of the cash ISA changes to understand how the new cap applies to them.

Frequently Asked Questions

For more on tax on savings interest, see Tax on Savings Interest: Rates in Ireland, UK & India. Pensioners may also want to read DWP Bank Accounts for Pensioners – 2026 Checks and Protections.