Every tax year, UK savers can put up to £20,000 into an ISA. The allowance resets on 6 April and cannot be carried forward. Understanding how the limit works across different account types, what happens when you withdraw money, and what may change in future years is essential for anyone trying to make the most of their tax-free savings.
The ISA allowance has stood at £20,000 per person per tax year since 2017/18. It applies to the combined total you contribute across all your ISAs in a single tax year, though individual product types have their own caps. The allowance is confirmed for 2025/26 and is expected to remain at the same level for 2026/27, according to multiple financial sources.
Money held within an ISA grows free of UK income tax and capital gains tax. That tax treatment makes the annual allowance a valuable tool for long-term savers, particularly as other tax thresholds have been frozen in recent years.
Can I Put £20,000 in an ISA Every Year? The Simple Answer
Yes. The UK ISA allowance is £20,000 per person per tax year for 2025/26 and is widely expected to remain at that level for 2026/27. You can contribute the full amount to a single ISA or divide it across several accounts, as long as your total subscriptions do not exceed the annual cap.
Tax year runs 6 April to 5 April
One account or split across multiple ISAs
No tax on interest, dividends, or capital gains
Example: £60,000 after 3 years of contributions
Key insights on the £20,000 ISA allowance:
- The allowance resets every tax year on 6 April. Any unused portion is lost and cannot be carried forward.
- You can split your allowance across multiple ISAs of different types, but only up to £4,000 can go into a Lifetime ISA each year.
- ISA contributions are cumulative across tax years. After five years of full contributions, you could hold £100,000 in tax-free accounts, plus any growth.
- From 6 April 2024, new rules allow multiple subscriptions to the same type of ISA in a single tax year, except for Lifetime ISAs and Junior ISAs, which remain restricted to one account each.
- Partial transfers between ISA providers are now permitted, giving savers more flexibility to move money without losing tax benefits.
| Fact | Value |
|---|---|
| Maximum annual subscription | £20,000 per person |
| Tax year | 6 April to 5 April |
| Types of ISA you can use | Cash, Stocks & Shares, Innovative Finance, Lifetime (max £4,000), Help to Buy (closed to new accounts) |
| Can you hold multiple accounts? | Yes – different types or, from 2025/26, multiple of the same type |
| Tax on interest or growth | None |
| Allowance 2026/27 status | Not officially confirmed by HMRC – widely expected to remain £20,000 |
Can I Split My ISA Allowance Across Different Accounts?
Yes, you can divide your £20,000 allowance across multiple ISA accounts and multiple ISA types, provided your total subscriptions stay within the annual limit. This flexibility allows you to hold different kinds of assets in different accounts or to take advantage of the best rates from several providers.
What counts toward the £20,000 limit
Contributions to Cash ISAs, Stocks and Shares ISAs, Innovative Finance ISAs, and Lifetime ISAs all count toward the overall annual ISA allowance. The Lifetime ISA has its own sub-limit of £4,000 per tax year, and that amount is part of the £20,000 total. Junior ISAs have a separate allowance of £9,000 and do not use up any of an adult’s £20,000 limit.
Can I have two cash ISAs with different providers?
Yes. Since 6 April 2024, it has been possible to pay into multiple ISAs of the same type in the same tax year. This means you can hold two or more cash ISAs with different providers simultaneously. The only exceptions are Lifetime ISAs and Junior ISAs, which remain limited to one account of their type per year.
If you hold ISAs with multiple providers and want to consolidate them, transfers do not count toward your annual subscription limit. Moving money from one ISA provider to another via a formal ISA transfer uses none of your £20,000 allowance. However, withdrawing cash and redepositing it yourself would count as a new subscription, so always use the transfer process.
What happens to my ISA at the end of the tax year?
On 5 April each year, the tax year ends. Any unused ISA allowance expires and cannot be used in the new tax year. On 6 April, a fresh £20,000 allowance becomes available. Money already inside your ISA continues to grow tax-free regardless of the calendar; only new subscriptions are affected by the annual reset.
How Much Can I Withdraw from an ISA Tax-Free?
There is no limit on how much you can withdraw from an ISA, and withdrawals themselves are not taxed. The tax advantage lies in the returns earned inside the ISA: interest, dividends, and capital gains all accrue free of UK income tax and capital gains tax.
Flexible ISAs and the replacement rule
Some ISAs are designated as flexible ISAs. These allow you to withdraw money and replace it later in the same tax year without reducing your remaining annual allowance. For example, if you pay in £15,000, withdraw £5,000, and the ISA is flexible, you can put that £5,000 back later in the same tax year and still have £5,000 of your original allowance left to use.
Non-flexible ISAs
For non-flexible ISAs, withdrawals generally do not restore your allowance. Once you subscribe money, that portion of your annual limit is used for the tax year, regardless of whether you later withdraw the funds.
The tax-free treatment applies to the growth inside the ISA, not to the act of withdrawing. Whether you take out £100 or £100,000 in a single year, you will not face a tax charge on the withdrawal itself. The tax benefit has already been realised while the money was invested or saved within the ISA wrapper.
What Are the Changes to ISA Rules in 2026 and 2026/27?
Several sources confirm that the overall ISA allowance remains at £20,000 for the 2026/27 tax year. No reduction to the general limit has been announced for that period. However, proposed changes have been reported for the following year.
Some sources report a planned change from 6 April 2027 that would reduce the cash ISA allowance for savers under 65 to £12,000, with the remaining allowance needing to be placed in a Stocks and Shares ISA. Older savers aged 65 and above would retain the full cash ISA allowance. On the evidence available, the most consistent reading is that the £20,000 overall ISA allowance remains in place for 2025/26 and 2026/27, while the cash-ISA-specific restriction is intended for a later tax year starting in 2027/28.
These proposed changes to the cash ISA limit have not yet been legislated. The exact details and timeline depend on future budget announcements. Savers should monitor official communications from HMRC and the Treasury for confirmed rule changes before making long-term plans.
What Happens to My ISA at the End of the Tax Year?
The ISA calendar follows a clear annual cycle. Understanding the key dates helps you avoid losing your allowance.
- 6 April 2025 – Start of the 2025/26 tax year. New partial transfer rules and the ability to hold multiple ISAs of the same type come into effect.
- 5 April 2026 – End of the 2025/26 tax year. Any unused ISA allowance expires and cannot be carried forward.
- 6 April 2026 – Start of the 2026/27 tax year. A fresh £20,000 allowance becomes available.
- Autumn 2025 (TBC) – The UK Autumn Budget may include announcements affecting ISA rules for future tax years, including the proposed cash ISA restriction from 2027/28.
Money already inside your ISA continues to grow tax-free across these dates. Only new subscriptions are affected by the annual reset.
Is the ISA Allowance Cumulative Over Multiple Years?
Yes. The allowance is cumulative across tax years. If you contribute £20,000 in year one and another £20,000 in year two, you can hold £40,000 plus any growth in your ISAs by the end of the second year. There is no upper limit on the total amount you can hold inside ISAs over your lifetime.
Established information
- The current ISA allowance is £20,000 per tax year, a level that has stood since 2017/18.
- The allowance resets every year on 6 April.
- You can contribute to multiple ISAs of different types.
- All ISA interest and growth is tax-free.
- You can withdraw money from a cash ISA at any time without losing tax benefits, though you cannot replace it unless within the same year’s allowance or via a flexible ISA.
Information that remains unclear
- The ISA allowance for 2026/27 has not been officially confirmed by HMRC, though it is widely expected to remain at £20,000.
- Specific interest rates on cash ISAs depend on the provider and are variable.
- Future changes to ISA rules, such as a digital shares allowance or fractional shares, may be announced in upcoming budgets.
Why Does the ISA Allowance Matter in the Current Economic Climate?
The £20,000 ISA allowance has been frozen since 2017/18. Inflation has eroded its real value significantly over that period, meaning savers can effectively save less in real terms than they could seven years ago. Despite this, ISA popularity remains high because tax-free growth is especially valuable given rising marginal tax rates and frozen income tax thresholds in the UK.
The 2025/26 rule changes, including multiple subscriptions and partial transfers, represent the biggest ISA flexibility reforms in a decade. These changes were likely driven by consumer demand for easier account switching and better rate shopping.
For married couples and civil partners, an additional provision exists: a surviving spouse or partner may receive an Additional Permitted Subscription (APS) in addition to their normal ISA allowance, allowing them to inherit ISA savings without losing the tax benefits.
What Do the Official Sources Say About ISA Rules?
The UK government’s official guidance on ISAs provides the primary authoritative source for the core rules. The Money and Pensions Service, a government-backed body, also publishes detailed guidance on the annual cycle and transfer rules.
“Every tax year you can save up to £20,000 in one account or split the allowance across multiple accounts.”
UK Government (Gov.uk)
“You can add a maximum of £20,000 into ISAs each tax year (between 6 April and 5 April). Transferring your ISA means you keep your allowance from the same tax year.”
MoneyHelper (MAPS)
“The overall ISA allowance for 2025/26 is £20,000. For Lifetime ISAs, the maximum subscription is £4,000, which counts towards the overall allowance.”
HMRC official regulations
What Should You Consider When Planning Your ISA Contributions?
If you have not yet used your full allowance for the current tax year, the key action is to subscribe before the 5 April deadline. Consider whether a Lifetime ISA fits your long-term goals if you are saving for a first home or retirement, as the £4,000 sub-limit still counts toward your overall £20,000 allowance. For those with existing ISAs, the new partial transfer rules make it easier to move money between providers without losing tax benefits.
ISA allowance 2025/26 and 2026/27 – £20,000 limit explained
Frequently Asked Questions
If I put £20,000 in an ISA, how much interest will I get?
Interest depends on the provider and type of ISA. Cash ISA rates vary, typically between 3% and 5% AER as of 2025. Stocks and Shares ISA returns depend on market performance. Use an ISA comparison tool for current rates.
Can I have £40,000 in an ISA over 2 years?
Yes. If you contribute £20,000 in year one and £20,000 in year two, plus any growth, you can hold £40,000 or more in total. The allowance is cumulative across tax years.
What happens if I exceed the £20,000 ISA allowance?
HMRC will notify you and may charge tax on the excess amount. You should contact your ISA provider immediately to correct the overpayment.
Is there an age limit for opening an ISA?
You must be 18 or over for most ISAs, except Junior ISAs which are for under-18s. There is no upper age limit.
What is a Help to Buy ISA?
A Help to Buy ISA is a now-closed scheme that offered a 25% government bonus on savings up to £12,000 for first-time homebuyers. It closed to new accounts in November 2019.
Does transferring an ISA use my annual allowance?
No. ISA transfers do not count toward your annual subscription limit, provided they are done as a formal transfer rather than a withdrawal and redeposit.
Can I have a cash ISA and a stocks and shares ISA in the same year?
Yes. You can split your £20,000 allowance across a cash ISA and a stocks and shares ISA, or any other combination of ISA types, as long as the total stays within the annual limit.
What is the Junior ISA allowance for 2026/27?
The Junior ISA limit is £9,000 for 2026/27. This is separate from the adult ISA allowance and does not affect your £20,000 limit.
Are ISA withdrawals taxed?
No. Withdrawals from an ISA are not taxed. The tax advantage applies to the interest, dividends, and capital gains earned inside the ISA, which grow free of UK income tax and capital gains tax.
Freddie Harry Cooper Bennett is a staff writer for DailyPressUK.co.uk, covering UK news, politics, business and culture. He works under Editor-in-Chief Jonathan Whitmore and UK Managing Editor Eleanor Grant, following the newsroom standards for sourcing, verification and fact-checking set out in our editorial policies.