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In this regularly updated round-up, This is Money picks our five favourite cash Isas for savers in 2025.
It is essential reading to help you choose a top savings account for your money that can also protect you from tax – and we detail the top easy access and fixed rate deals.
This top Isa round-up has keeping our readers updated on the best savings deals since 2014 – and is kept up-to-date weekly – bookmark it for the very latest developments.
Piggy five: We round-up the best tax-free deals – and it is slim pickings at the moment
How an Isa works and why you should have one
Each year in April, savers are given a fresh Isa allowance that qualifies for tax-free interest.
For the 2024/25 financial year, starting 6 April 2024 and ending 5 April 2025, the limit is £20,000.
You can transfer Isa money whichever way you wish between an investment account to savings account, whereas previously you could only shift it from saving to investments.
Cash Isa rates have been rising, along with non-tax free rates. It is worth opening one to shield money away from the taxman, especially with rates moving upwards.
Isa rules state you can only contribute to one Isa per tax year.
You can also transfer an old Isa for better returns. Here’s a quick guide to Isa saving.
It is possible to switch your current year’s cash Isa if you move the entire amount, but it is far simpler to get your choice right in the first place.
Get an Isa to beat savings tax
The cash Isa savings market has seen considerable improvement off the back of Bank of England rate rises. The best buy easy-access rates on a tax-free account pay more than 5 per cent.
Many may ask themselves why bother? Especially given that rates on non tax-free accounts can be higher.
Yet with inflation above target, it becomes even more important to make sure you are getting as much as you can from your savings.
And higher rates have dragged more people into the savings tax net, meaning a cash Isa’s shelter is even more valuable.
An Isa is worth having, despite the tax-free savings interest allowance of £1,000 a year for basic rate taxpayers and £500 for higher rate taxpayers.
If you’re a basic-rate taxpayer earning 5 per cent interest, having more than £20,000 in savings will tip you into tax, for a higher-rate taxpayer that figure is £10,000 and if you are in the 45p tax bracket, you get no savings allowance at all.
You may also want to look into stocks and shares version of an Isa – how to choose the best (and cheapest) DIY investing Isa.
Our five favourite Isas:
– Facts: £1 to open
– Transfers in: Yes
– Flexible: Yes
– This is Money says: This is the best account if you are looking for a true easy-access Isa that doesn’t cut your rate for withdrawing money. The rate does not include a bonus rate which disappears after 12 months either.
The account can only be opened by downloading Trading 212’s app. There are no limits to how many times you can withdraw your money and Trading 212 will not reduce your interest rate for accessing your money.
Trading 212’s Isa is a flexible Isa which is a big benefit to savers with the financial fire power to max out their Isa limit each year.
Flexible Isas allow you to dip into your pot and, as long as you put the money back in during the same tax year, it doesn’t lose its tax-free wrapper or use up any of that year’s Isa allowance.
Other top flexible easy access cash Isas come from CMC Invest* at 4.86 per cent, Monument at 4.76 per cent, Chip* offering 4.58 per cent and Zopa at 4.55 per cent.
Any cash deposited with Trading 212 is fully FSCS protected, as are all of the accounts in this list. Funds in the Trading 212 Isa are held in partner bank accounts with Barclays, NatWest and JPMorgan.
Customers are able to see the percentage of their cash held at each bank is in the interest on the cash tab in the Trading 212 app.
It means if you already have money in Barclays, NatWest or JPMorgan, you’ll need to be careful not to breach the £85,000 limit if you put money away with Trading 212.
The interest is paid monthly.
Moneybox, easy-access, 5% [full details]
Facts: £500
Transfers in: Yes
Flexible: No
This is Money says: At 5 per cent, Moneybox now offers the highest rate for a cash Isa. This is the best Isa for savers who are purely looking to get the highest rate.
The rate includes a bonus rate of 0.55 per cent for the first 12 months and the underlying rate is a variable 4.45 per cent.
Customers can only make up to three free withdrawals without any impact on their rate. Be warned, after the fourth withdrawal, the rate drops to just 0.75 per cent. It will also drop to this level if the value of money held in the Isa goes below £500.
You can transfer in other Isa you hold to the Moneybox Isa.
Moneybox’s Isa is not flexible, so any money withdrawn from it cannot be replaced within the same tax year without affecting your £20,000 Isa allowance. You will lose whatever amount you withdraw from the allowance.
The Isa can be opened with a deposit starting from £500 on the Moneybox app.
Money kept in Moneybox’s Isa is fully FSCS protected. Moneybox leans on several banks to provide FSCS protection for its cash Isa. It says these banks can change over time but the banks it currently uses are:
- HSBC
- Santander UK
- National Westminster Bank
- Clydesdale Bank
- Bank of Scotland
- Lloyds Bank
- Qatar National Bank (Q.P.S.C.)
- First Abu Dhabi Bank P.J.S.C.
- National Bank of Kuwait (International)
- The Bank of New York Mellon, London Branch
The amount of money held with each bank can vary over time. Moneybox says it will never hold more than 50 per cent of the total funds with a single bank at any given time.
If you already have money in any of these banks, you’ll need to be careful not to breach the £85,000 limit if you put money away with Moneybox.
Shawbrook Bank, one-year fix, 4.53% [full details]
– Facts: £1,000 to open
– Transfers in: Yes
– Flexible: No
– This is Money says: Shawbrook Bank now offers the best one year Isa. It can be opened and manageed online on Shawbrook Bank’s website with a minimum of £1 and it accepts transfers in.
There is an option to receive interest monthly, in which case the rate is 4.44 per cent.
A saver depositing £10,000 in this Isa would earn around £463 interest after a year.
Kent Reliance, two-year fix, 4.42% [full details]
– Facts: £1,000 to open
– Transfers in: Yes
– Flexible: No
– This is Money says: Kent Reliance now offers the best two-year fixed rate Isa. This Isa can be opened and managed online on Kent Reliance’s website or in a Kent Reliance branch with a minmum of £1,000.
A saver depositing £10,000 in this Isa would earn around £923 interest after a year.
The best lifetime Isa
Moneybox, Cash lifetime Isa, 4.8% [full details]
– Facts: £1 to open
– Transfers in: Yes
– Flexible: No
– This is Money says: For those aged between 18-39 who are either saving up to buy their first home or towards retirement, this is the best paying cash Lisa deal on the market.
Save up to £4,000 each tax year and get a 25 per cent government bonus. The deal is only available via its app.
The rate includes a 1 per cent fixed bonus for the first year, the underlying rate is 3.8 per cent
SAVE MONEY, MAKE MONEY
1% cashback
1% cashback
On debit card spending. Max £15 p/m*
Energy bills
Energy bills
Find out if you could save with a fixed tariff
Free share offer
Free share offer
No account fee and free share dealing
4.5% 1-year Isa
4.5% 1-year Isa
Hampshire Trust with Hargreaves Lansdown
Sipp fee offer
Sipp fee offer
Get six months fee-free on a Sipp
Affiliate links: If you take out a product This is Money may earn a commission. These deals are chosen by our editorial team, as we think they are worth highlighting. This does not affect our editorial independence. *Chase: Cashback available for first year. Exceptions apply. 18+, UK residents.
Some links in this article may be affiliate links. If you click on them we may earn a small commission. That helps us fund This Is Money, and keep it free to use. We do not write articles to promote products. We do not allow any commercial relationship to affect our editorial independence.
Read More: Best cash Isa rates 2024: Our pick of the five top deals