You must be a UK resident aged 18+. You can only subscribe to one Cash ISA with NatWest in this tax year up to £20,000. Tax free Interest means interest payable is exempt from UK income tax. Tax reliefs referred to are those applied under current UK legislation, which may change.
Choose an ISA that works best for you
Cash ISAs are a simple, tax-efficient way to save. They could make your money work harder than a traditional savings account.
What is a cash ISA?
- An ISA (Individual Savings Account) is sometimes known as a 'tax-wrapper' as you won't have to pay income tax on the interest you earn.
- You can pay in up to £20,000 each tax year across all ISA accounts you hold as part of your annual ISA allowance.
- NatWest offers two types of cash ISAs for over 18s: an instant access cash ISA and a fixed rate cash ISA.
Is a fixed rate ISA best for you?
- 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 - 4.40% AER/Tax-free p.a. (fixed)
- 2 year term - 4.40% AER/Tax-free p.a. (fixed)
No withdrawals or deposits during the term. Available for new customers until 27 May 2026 and existing customers until 01 June 2026.
Please note that these issues may be withdrawn early due to limited availability.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.
Is an instant access cash ISA best for you?
- 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.
Cash ISA - FAQs
Take a look at other saving options
We have a range of other savings accounts available. Check out all the options we've got to see if one might be right for you.
Please remember that once you move your money from an ISA to a non-ISA account the money will no longer have tax free status.
Specific account eligibility apply.
Financial Services Compensation Scheme
Your eligible deposits held by a UK establishment of NatWest are protected up to a total of £120,000 by the Financial Services Compensation Scheme, the UK's deposit guarantee scheme. Any deposits you hold above the limit are unlikely to be covered.
Read the FSCS Leaflet (PDF, 3MB) to find out more about the scheme and how it protects your money.
Investments through NatWest Invest may also be covered by the Financial Services Compensation Scheme in some scenarios. You can find out more here.
How to start saving
Ready to start saving and take control of your financial future? Check out our guide to discover the benefits of using a savings account, how to save regularly, and how your savings can earn you interest.
Work towards your savings goals today
Got specific financial goals but don't know where to start? We're here to help. Discover the best strategies for saving towards your goals, and get tips for staying motivated along the way. Plus, explore tools and resources that could help track your progress and achieve your savings goals faster.
Discover our savings accounts
Stash the cash for your future with one of our many savings accounts. Whether you're saving for the long term, or for a certain goal, we could have an account for you. Specific account eligibility criteria apply.