Cash ISA

Account name

What is the interest rate?

Interest is calculated daily and paid monthly into this account.

AER stands for Annual Equivalent Rate. This illustrates what the interest rate would be if interest was paid and compounded once a year. Tax free is the interest rate payable where interest is exempt from UK income tax.

The interest you earn in your Cash ISA will be tax-free so long as your account is managed in line with the Government’s rules. The tax treatment of ISAs and the applicable Government rules are subject to change. The benefits of your account for tax purposes will depend on your personal financial circumstances.

Can Marcus by Goldman Sachs change the interest rate?

Yes, the interest rate is variable. Please see part 2 of the terms and conditions for information on when we may vary your interest rate and how we’ll let you know.

What would the estimated balance be after 12 months and 24 months based on a £1,000 deposit?

This projection assumes that you do not make any withdrawals or further deposits and that interest is paid into this account. This is for illustrative purposes only, and doesn't take into account your individual circumstances.

How do I open and manage my account?

You can open this Cash ISA online. To apply, your permanent residential address must be in the UK, and you must be a UK tax resident and aged 18 or over. You’ll also need your own email address, mobile phone number and National Insurance number. Once open, you can manage your account online. You can also give some instructions by phone.

It’s your responsibility to keep track of the contributions you make to the ISAs you open and hold. Each tax year, the government sets a contribution limit for ISAs, and for 2026/2027 it’s £20,000. That’s the total amount you can pay into any ISAs you hold, with any bank, this tax year. Additionally, your total payments into your Cash ISA over time can’t go over £1,500,000. Neither of these limits apply to other Marcus accounts you hold with us, which will have their own pay in limits.

If you hold a valid Power of Attorney and would like to open a Cash ISA on behalf of someone else, please call us on 0800 085 6789.

Transferring in cash ISAs from other providers

New and existing customers can transfer in cash ISAs from most other providers to a Marcus Cash ISA once opened.  


You can transfer in all or some of the existing cash ISA – up to the £1,500,000 limit of your Marcus Cash ISA – and the money can be from the current and previous tax years. 

See which providers we accept cash ISA transfers from:

Can I withdraw money?

Yes, by logging into your account or by calling us. You can pay money to and from your Cash ISA using your linked account, which must be a UK current account in your name. If you have more than one Marcus account and those accounts allow you to move money, you can also transfer money between them.

This is not a flexible ISA. So if you do make a withdrawal, the amount taken out cannot be replaced and will still count towards your annual ISA allowance. By taking money out of your Cash ISA, you’re also giving up the tax-free benefits on the amount taken out. This means you might need to pay tax on any future interest you earn on that amount.

You can also transfer your Cash ISA savings in full to an ISA with another provider and keep the tax-free benefits on the money transferred.

There may be limits to how much you can take out of your Marcus account online, in one payment or per day. This is to protect your money against fraud.

See our Help page for more information.

Additional information

You can cancel this account within 14 calendar days of the date on which your account was opened by calling us. If you cancel within the 14 days, your account will be closed and any money you’d paid in won’t count towards your annual ISA allowance. Please see part 2 of the terms and conditions for more information about what happens when you cancel.

We can’t accept additional permitted subscriptions into a Marcus Cash ISA.

The rates and information in this summary are correct as of 13 May 2026.