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Earn tax-free interest with a Fixed Rate Cash ISA

Earn competitive interest rates when you save with an OakNorth Fixed Rate Cash ISA. Depending on how long you lock your savings away, you could earn up to 4.84%

Tax-free savings with competitive rates

A Fixed Rate Cash ISA is a tax-free individual savings account, which means you won’t pay any tax on the interest that you earn.

You can save up to £20,000 into one cash ISA in any one tax year. With an OakNorth Fixed Rate Cash ISA, you’ll earn a set interest rate throughout, so you’ll know what your returns are upfront – and they won’t change. So, if you’re looking to make your money go further, see our range of ISAs with terms from 12 to 36 months.

What do you get with an OakNorth Fixed Rate Cash ISA?

Tax free earnings

Enjoy tax-free earnings on your interest. You can save up to £20,000 in any one tax year.

Transparent returns

The interest rate you start with won’t change for the duration of your term. You can also track your earnings on the app or online.

Low minimum deposits

We won’t make you deposit a large amount just to create an account. You can open an OakNorth Fixed Rate Cash ISA with just £1.

How long can you lock your savings away?

12 months

Our most popular account

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24 months

Ideal for long-term savers

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36 months

Ideal for long-term savers

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Loyalty bonus rates of up to 0.05% extra for reinvesting Fixed Rate Cash ISA Customers can be found here.

Why save with OakNorth?

Earn more with competitive rates

With an OakNorth Fixed Rate ISA, you could earn up to 4.84% interest to help your savings grow.

Set up your account in minutes

Sign up for your account in a few minutes either online or via our app.

Manage your money easily

Open new accounts, manage existing ones and watch your money grow from your online account or our app.

Save securely with FSCS protection

Eligible deposits are protected up to £85,000 by the Financial Services Compensation Scheme.

Secure savings for peace of mind

We’re a fully regulated and licensed bank, which means if you’re eligible to open an OakNorth account, your money is protected up to £85,000 with the Financial Services Compensation Scheme (FSCS).

Retail savings app

Keeping on top of your savings has never been easier

Whether it’s moving money or opening new accounts, everything you need to keep track of your savings is on the OakNorth app.

How do I open a Fixed Rate Cash ISA?

Like an OakNorth Fixed Term savings account, a Fixed Rate Cash ISA requires you to lock your savings away for an agreed time. Except with a Fixed Rate Cash ISA, you can withdraw money at any point if you really need to.

If you choose to withdraw your money before your term has ended, you’ll be charged a penalty fee on the amount withdrawn – equivalent to an interest deduction of 90 days for a 12-month term, 180 days for a 24-month term and 270 days for a 36-month term.

You should keep this in mind when choosing this option, as you’ll want to make sure you have a savings account that gives you the flexibility you need. Once you’ve chosen the right Fixed Rate ISA for you, either apply online or download the OakNorth app to open your new account.

What our customers are saying

Not the right account for you?

A Fixed Rate Cash ISA means putting away your savings to earn competitive interest rates and avoid penalty fees. Although we allow you to withdraw your money at any time, this comes with a penalty – equivalent to an interest reduction. So, if you think you’ll need regular access to your savings an Easy Access savings account may be a better fit for you.



If you’re over 18 years old and you’re a resident of the UK – i.e. you have a permanent UK address that you’ve had for over three years – then you’re eligible for an OakNorth fixed rate cash ISA. You’ll also need to have a personal UK bank or building society account to transfer funds into your account.

ISAs are individual savings, so we don’t offer joint ISA products.

No, your interest rate will remain the same throughout the duration of your fixed term ISA.