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Autumn Budget announcement

Government changes to cash ISA limits

What’s changing from 6 April 2027

Your total annual ISA allowance will still be £20,000, but the way you can use it will change for those under 65:

  • You’ll be able to put up to £12,000 in a cash ISA each tax year.
  • The rest – up to £8,000 – could go into a stocks and shares ISA.
  • Or, you can choose any combination that suits you, as long as you don’t exceed £12,000 in a cash ISA and your total across both types of ISAs doesn’t go over the £20,000 total ISA allowance.
  • The annual limit for stocks and shares ISAs remains at £20,000.
  • For those aged 65 or over, these changes don’t apply. The full £20,000 annual ISA allowance will remain, which can be used across all ISAs.


The changes only apply to new contributions from 6 April 2027 onwards, so you still have this tax year and the next to save up to £20,000 in a cash ISA tax free, if that’s right for you.

Any money already saved in your cash ISA from this year or previous years, should stay protected and continue to earn tax-free interest.

No changes have been made to the Junior ISAs allowance, which remains at £9,000 each tax year per child.

Separate to the changes announced for ISAs, from April 2027, the income tax you pay on interest received from savings, (over your personal savings allowance and outside of ISAs) will increase to 22% for basic-rate taxpayers, 42% for higher-rate taxpayers and 47% for additional-rate taxpayers.

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Your essential guide to ISAs

We're here to help you understand the details on ISA benefits, your ISA allowance and more, including ways to manage your ISA.

ISAs explained

We’ve created short, easy videos to explain how ISAs work. You’ll also discover how to make the most of your annual ISA allowance.


Please note, the annual ISA allowance and how it can be used, referenced in these videos, are those applied under current legislation. From 6 April 2027 how you use your allowance will change for under 65s.

ISAs explained

In this video we cover all the basics of ISAs.

Fixed rate cash ISA

All you need to know on how fixed rate cash ISAs work.

Instant access cash ISA

Discover how instant access cash ISAs work.

Saving and Investing

Learn the key differences between saving and investing.

Stocks and shares ISA

Explore how stocks and shares ISAs work.

Cash ISAs that we offer

Information Message

You must be 18 or over and a UK resident for tax purposes. You can only subscribe to one cash ISA with NatWest Bank up to £20,000 for the current tax year. Not eligible for Round Ups.

Fixed Rate ISA

  • Fixed interest for long term savings with tax-free benefits.
  • Choose a term and open your account with £1,000.
  • Fix your savings interest rate, so you know exactly what your pot will earn.

1 and 2 year Fixed Rate ISA rates

  • 1 year term - 4.20% AER/Tax-free p.a. (fixed). Term end date 07 January 2027.
  • 2 year term - 4.00% AER/Tax-free p.a. (fixed). Term end date 07 January 2028.

No withdrawals or deposits during the term. Available for new customers until 11 December 2025.

Available to existing customers until 16 December 2025.

Please note that these issues may be withdrawn early due to limited availability.

Interest is calculated daily and paid annually to your ISA on the first business day in April and on the Maturity Payment Date. Early closure fees may apply.

Information Message

Cash ISA

  • Flexible savings with tax-free benefits.
  • Start your ISA savings with as little as £1.
  • Instant access so you can take money out whenever you need it.

NatWest's Cash ISA rates 

  • 1.15% / 1.14% AER / Tax free p.a. (variable) on balances of £1-£24,999.
  • 2.45% / 2.42% AER / Tax free p.a. (variable) on balances of £25,000+.

Interest is paid monthly on your savings.

Information Message

Stocks & Shares ISAs that we offer

Information Message

The value of investments can fall as well as rise, and you may not get back the full amount you invest. Eligibility criteria, fees and charges apply. Tax reliefs referred to are those applied under current legislation, which may change. The availability and the value of any tax relief will depend on your individual circumstances.

Adult Stocks & Shares ISA

  • Investment account that allows you to invest up to £20,000 a year tax efficiently.
  • Five investment funds from defensive to adventurous are available to hold in your NatWest Invest Stocks & Shares ISA.

There's no UK Income Tax or Capital Gains Tax on any money your investment makes. You can withdraw at any time, but you should aim to invest for 5 years or more.

Information Message

Junior Stocks & Shares ISA

  • Tax-efficient investment account for children. 
  • Parents or legal guardians can open a Junior ISA for their child and can put in up to  £9,000 a year.

When your child turns 18, they get access to the money. It could help them with university costs, travelling around the world or their first home. 

Information Message

I want to transfer from an existing ISA

An ISA transfer is when you switch your ISA savings to a new provider. You might do this to get a better interest rate, or to take advantage of a different type of ISA altogether. You can transfer an existing ISA held elsewhere into your NatWest ISA at any time, bringing all your ISAs together in one place.

Transferring an ISA from a previous tax year won’t affect your allowance for this year. Just remember to go through the ISA transfer process. That way, you won't lose out on any of your tax benefits.

Full details on how to complete an ISA transfer can be found here.


Please note, your existing provider may charge an ISA transfer fee.