"How many ISAs can I have?" is one of the most common questions people ask about ISAs — and the answer trips a lot of people up, because there are really two separate questions hidden inside it: how many you can hold, and how many you can pay into in a single tax year. Let's untangle both, in plain English.
The short answer
You can hold as many ISAs as you like built up over the years — there's no limit on the total number of ISA accounts you own. What's capped is how much you can pay in across all of them in one tax year: that's your annual ISA allowance, which is shared across the ISAs you contribute to.
The four types of ISA
There are four main kinds, and the rules treat them as a family sharing one allowance:
- Cash ISA — holds savings, like a tax-free savings account.
- Stocks and shares ISA — holds investments such as funds or shares. See our stocks and shares ISA guide.
- Lifetime ISA (LISA) — for a first home or retirement, with a government bonus and its own rules. See our Lifetime ISA guide.
- Innovative Finance ISA — holds peer-to-peer lending (higher risk, less common).
How many can you pay into in a year?
The rules around paying into multiple ISAs of the same type in one tax year have been changed by the government in recent years, and the specifics (including the annual allowance amount and any limits on the Lifetime ISA) are reviewed periodically. Because this is exactly the kind of detail that goes out of date, the reliable approach is to check the current rules on gov.uk before you act — rather than trusting a fixed figure you read somewhere. What has stayed consistent is the core principle: there's one overall annual allowance, and what you pay into one ISA reduces what's left for the others that year.
A worked example of the allowance
Imagine your total annual ISA allowance is a single pot. If you put some into a cash ISA and some into a stocks and shares ISA, those contributions both draw from the same yearly pot — they don't each get a separate allowance. So spreading money across types doesn't give you more total room; it just splits the same room differently.
| Action | Effect on your annual allowance |
|---|---|
| Pay into a cash ISA | Uses part of your one annual allowance |
| Also pay into a stocks & shares ISA | Uses more of the same allowance |
| Open a new ISA but pay in nothing | Uses none of your allowance |
What about ISAs from previous years?
Money you paid into ISAs in previous tax years sits separately and doesn't count against this year's allowance. That's why people can accumulate many ISAs over time — each year's contributions are their own. You can often transfer old ISAs between providers to chase better rates without it affecting your current year's allowance, as long as you use the provider's official transfer process rather than withdrawing and re-depositing.
The practical takeaway
You can own as many ISAs as you accumulate over the years, and you can usually split each year's allowance across different types. What you can't do is multiply your total tax-free allowance by opening more accounts — the annual limit is shared. For the current allowance figure and the latest rules on paying into multiple ISAs of the same type, always check gov.uk, since these are reviewed and changed periodically.
New to ISAs altogether? Start with our plain-English guide to stocks and shares ISAs, or see saving vs investing for whether a cash or investment ISA suits your timeframe.