Yes, you can pay up to £20,000 into the same cash ISA every year, provided you do not exceed the total annual ISA subscription limit. This limit, which resets every tax year (6 April), allows you to save tax-free. From April 2027, the annual limit for cash ISAs will reduce to £12,000 for those under 65.
How much money can I put into ISAs? You can put up to £20,000 in ISAs in your name each tax year, which is a limit set by HMRC. The allowance limit resets when the new tax year starts and could change each year. There are currently four types of adult ISA – cash, stocks and shares, innovative finance and lifetime ISAs.
The UK government has announced significant changes to the tax treatment of cash held within stocks and shares Isas, targeting a loophole that could allow savers to bypass newly imposed caps on tax-free cash savings.
Putting money into an ISA
The tax year runs from 6 April to 5 April. You can only pay into one Lifetime ISA in a tax year.
There are no limits on the total number of ISAs you can open in a tax-year (from 6 April to 5 April the following year), so long as you don't exceed the £20,000 annual allowance. From April 2027, savers aged under 65 will only be able to put away £12,000 in cash ISAs each year.
You can deposit your full allowance into a single cash ISA, or split it across multiple accounts. This can help you balance accessibility and returns, while providing Financial Services Compensation Scheme (FSCS) protection up to £120,000 if the financial institution holding your money goes out of business.
Disadvantages: Interest rates may decrease, funds might be locked in fixed-rate ISAs, and not all accounts permit transfers, sometimes incurring exit fees.
US taxpayers are required to report all ISA income and capital gains on their annual US tax return. The nature of the income determines its tax treatment: Interest income, ordinary dividends, and short-term capital gains are taxed at ordinary tax rates.
From April 2027, people under 65 will only be able to pay in up to £12,000 of their overall allowance into Cash ISAs. Those aged 65 and over can continue to subscribe the full £20,000 annual allowance to Cash ISAs if they want to.
Are ISAs still the best for rates? No, cash ISAs do not always pay the best interest rates, so it's worth shopping around. Historically, to beat an ISA you would need to find a net interest rate on a savings account that was higher than an ISA's gross interest rate.
There are a number of factors you should consider before selecting a cash ISA.
If you're not paying tax on your savings interest, cash ISAs have no benefit – so many should ditch them for higher-paying standard accounts. That's the message from MoneySavingExpert.com founder Martin Lewis in the third episode of the latest series of ITV's The Martin Lewis Money Show Live.
Isa providers are obliged to provide contribution histories to HMRC. If you go over your limit without realising it, HMRC will contact you and you can arrange to correct the underpaid tax.
What were the Cash ISA changes announced in the Autumn Budget? The Budget confirmed that the Cash ISA allowance is set to be cut from April 2027. For under-65s, the Cash ISA allowance will reduce from £20,000 to £12,000. For 65s, and older, the Cash ISA allowance will remain at £20,000.
This is called the ISA allowance. The annual ISA allowance for the 2025/2026 tax year is £20,000. This means you can save up to £20,000 across different types of ISAs, including: Cash ISAs: Save money with a fixed or variable interest rate.
Can I keep my ISA if I move abroad? Yes, you can keep your cash ISA when you move abroad. However, you won't be able to make any more contributions to it.
At a glance: You won't pay tax on any interest earned from an ISA. Any interest earned from an ISA won't count towards your personal savings allowance either. You need to follow the rules around withdrawing from an ISA to make sure your money doesn't lose tax-free status.
The main difference is that a cash ISA is a tax-efficient way to save money. Interest on your savings is paid free from UK income tax and capital gains tax. While both could help your money grow, choosing the right one (or a combination of both) for your circumstances can help maximise your money's growth potential.
You can get around 7% interest on savings in the UK primarily through Regular Saver accounts, with top offers from Zopa (7.1% variable), First Direct (7% fixed), and the Co-operative Bank (7% variable), though these often require you to have their current account and limit monthly deposits, while Principality Building Society has offered rates near this (7.5%) on fixed-term savers, so check MoneySavingExpert and MoneyWeek for current deals.
You can open another Cash ISA, as long as you only pay money into one during the tax year. You can't open a new one and keep saving into your old Cash ISA. If you have lots of ISAs from previous tax years, you might be able to transfer your ISA. Not all providers will let you transfer an ISA.
It's not possible to roll over any unused allowance. For example, if you save £10,000 into your ISA this tax year, you can't add £30,000 into your ISA next year within the tax-free limit. Your ISA allowance would remain at £20,000 (unless the Government changed the ISA limit amount).
You can put 20k into ISAs every tax year, simple as that. The only thing that makes it more complicated is that specific accounts can have additional conditions.
When your fixed rate ISA matures, you normally have four main options: withdraw your money, transfer to another ISA, re-fix for a new term, or do nothing and allow your provider to move your money into a default holding account, usually an easy access Cash ISA.