Save tax-free with Cash ISAs

Whether you’re saving for now, soon or someday, our tax-free cash ISAs could help you grow your money faster.

Earn up to 4.70% AER interest (variable), paid at maturity.

The taxes you pay depend on your circumstances and could change in the future. Monzo current account required. UK residents 18+. Ts&Cs apply.

All the interest, none of the tax

Check out our Cash ISAs in a handy-dandy comparison table.

Access that works for you

Whether it's Instant, Select or Fixed, you can choose a way to save that suits you best.

Sort your savings

You can have multiple Pots within the same Cash ISA, helping you organise your money. One ISA allowance, many Pots.

Earn a boosted rate

Earn an exclusive rate on Instant and Select Access with a Monzo paid plan. From £3 a month, 18+, Ts&Cs apply.

What's a Cash ISA?

Cash ISAs are a type of savings account. But unlike other savings accounts, any interest you earn is exempt from UK income tax – so your money could grow faster.

You can add up to £20,000 across all your ISAs (whether they're with Monzo or somewhere else) each tax year.

Start saving

Instant Access Cash ISAs

Instant access with tax-free interest. There when you need it, growing when you don’t.

Earn up to 3.50% AER (variable), paid monthly. No minimum deposit.

Explore Instant Access Cash ISAs

Select Access Cash ISAs

Grow your money faster without locking it away and get a higher rate for making 2 (or fewer) withdrawals a year.

Earn up to 3.65% AER (variable), paid monthly. £500 minimum deposit.

Explore Select Access Cash ISAs

Fixed Rate Cash ISAs

Earn our best rate on savings you won't need for a while. 1, 2 and 3 year terms available.

Earn up to 4.70% AER (fixed), paid at maturity. £500 minimum deposit.

Explore Fixed Rate Cash ISAs

Many Pots, one Cash ISA

You can have multiple Pots within the same Cash ISA, helping to organise your money - whether it’s for a holiday, a rainy day fund, or a house deposit.

This means you can spread your annual ISA allowance across different savings goals, and move money between them without ever leaving your Cash ISA.

Start saving

FSCS protected

We’re a fully regulated UK bank and your eligible deposits are protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person. This includes money in your Savings Pots and Cash ISA.

Check out our Understanding FSCS protection article if you’d like to learn more.

Keep your savings safe

Extra security controls give you another layer of protection when making big bank transfers and withdrawing from your savings.

Pay from a known location, confirm it with someone you trust, or scan a secret QR code to prove it’s really you.

How to open a Cash ISA with Monzo

Open a free Monzo current account

It takes less than 10 minutes to apply, straight from the Monzo app.

Create a Cash ISA

Monzo current account sorted? Just head over to the Savings area, create a new Pot and choose a Cash ISA.

Start saving

Name your Pot, set an optional goal and make your first deposit. Earn up to 4.70% AER interest (fixed), paid at maturity.

Open a free Monzo account

Questions? We've got answers.

What is the difference between Monzo Cash ISAs

A Instant Access Cash ISA could work for money you expect to need sooner, or money that you’re likely to withdraw across many transactions. A Select Access Cash ISA could be a great option for medium-term savings goals where you'll probably need the money later, like a big trip, a wedding or even a house deposit. A Fixed Rate Cash ISA could be a good option for money you won't need for a while, where you can lock it away and earn our highest rate.

How much is the 2026/27 ISA allowance?

You can add up to £20,000 across all your ISAs (whether they're with Monzo or somewhere else) in the 2026/27 tax year.

Can I have more than one Cash ISA with Monzo?

Yes, you can have multiple Pots within the same Cash ISA, helping to organise your money, and they can be a combination of Instant Access, Select Access and Fixed Rate Pots.

This means you can spread your annual ISA allowance across different savings goals, and move money between them without ever leaving your Cash ISA.

Are Monzo Cash ISAs flexible?

Yes. A flexible cash ISA lets you take money out and put it back in within the same tax year, without it counting towards your ISA allowance. It can save you from losing your ISA allowance if you need to access your savings temporarily.

Start saving with Monzo today

Download the Monzo app on iOS or Android and join more than 16 million personal and business customers who've changed the way they bank.