New ISA Rules 2027: Cash ISA Limits, Transfer Bans and What Savers Must Know
The new ISA rules 2027 set a £12,000 annual cash ISA limit for savers under 65, while the overall ISA allowance stays at £20,000. The changes take effect from 6 April 2027, following confirmation by HM Treasury at the Autumn Budget 2025. Savers aged 65 and over keep the full £20,000 cash ISA allowance.
Key Takeaways
- The cash ISA limit for under 65s falls to £12,000 from 6 April 2027, while the £20,000 overall allowance stays the same.
- A 22% charge applies to interest on cash held inside stocks and shares ISAs from April 2027.
- HM Revenue and Customs confirms the £20,000 ISA allowance is frozen until April 2031, not 2030.
How the New ISA Rules Change From 2027?
The new ISA rules 2027 reduce the cash ISA allowance for savers under 65 and introduce new restrictions on moving money between ISA types. Chancellor Rachel Reeves is set to cut the cash ISA allowance to £12,000 a year as part of a wider push toward retail investment.
The cash ISA allowance 2027 changes reduce how much under 65s can hold in cash, leaving the £20,000 overall annual ISA allowance and stocks and shares ISA limits untouched. The overall £20,000 annual ISA allowance remains in place.
According to HM Revenue and Customs, the policy aims to encourage more retail investment rather than long term cash holding. It also introduces a 22% charge on interest earned on cash held inside a stocks and shares ISA.
The remaining £8,000 of the annual allowance must go into a stocks and shares ISA, an Innovative Finance ISA or a Lifetime ISA. Figures confirmed as of June 2026 via HM Revenue and Customs.
It is the biggest shake-up to the ISA system in over a decade. The ISA wrapper itself does not change, only how much of it can sit in cash.
Savers aged 65 and over face no change and keep the full £20,000 cash ISA allowance. In practice, what changes for you comes down to your age and how your ISA is currently split.
Cash ISA Allowance 2027 for Under 65s and Over 65s
The cash ISA allowance 2027 changes apply differently depending on age. Under 65s face a £12,000 annual cap inside a cash ISA, while over 65s keep the full £20,000 limit.
| Saver age | Cash ISA limit from 6 April 2027 | Remaining ISA allowance | Where it can go |
|---|---|---|---|
| Under 65 | £12,000 | £8,000 | Stocks and shares ISA, Innovative Finance ISA or Lifetime ISA |
| 65 and over | £20,000 | £0 | Not applicable |
The £20,000 annual ISA allowance stays the same for everyone. What changes is how much of it can be held in cash.
A saver turning 65 during the 2027/28 tax year gains the full £20,000 cash ISA allowance from the start of that tax year, not from their birthday. GOV.UK carries the full detail on how the age threshold applies.
Age, not income or existing savings, decides how the new limit applies.
Why Transfers Into Cash ISAs Are Being Restricted?
Under 65s will no longer be able to transfer money from a stocks and shares ISA or an Innovative Finance ISA into a cash ISA from 6 April 2027. Transfers in the opposite direction, from a cash ISA into a non cash ISA, will still be allowed.
The rule exists to stop savers using a stocks and shares ISA as a workaround once the cash ISA limit drops. Without it, someone could hold £20,000 in a non cash ISA and later move it into cash, keeping the old allowance in practice.
HM Revenue and Customs describes this as one of several rules designed to prevent circumvention of the lower cash ISA limit.
The restriction applies regardless of how long the money has already been held in the non cash ISA. The new ISA transfer rules apply specifically to under 65s and lift automatically at the start of the tax year in which a saver turns 65.
Anyone who values the flexibility to move money into cash should weigh that up before the rule takes effect.
What Counts as Cash Like Inside a Stocks and Shares ISA?
From April 2027, a 22% charge will apply to interest earned on cash held inside a stocks and shares ISA or an Innovative Finance ISA. Money market funds are not classed as cash for this purpose, provided they are not the only asset held in the account.
- Treated as cash like and subject to the charge: uninvested cash balances and alternative finance returns such as Sharia compliant returns
- Not treated as cash like: individual shares, investment funds, investment trusts, exchange traded funds, and corporate or government bonds
- Money market funds: exempt from the charge, but cannot make up the entire ISA
The Financial Conduct Authority oversees how providers report these holdings, and a technical consultation on the draft legislation is underway. The charge applies at a flat rate of 22%, regardless of a saver’s income tax band.
The Rachel Reeves investment ISA levy was confirmed alongside the wider cash ISA cap to stop savers sheltering cash inside investment wrappers. The 22% charge targets idle cash specifically, not genuine investment activity.
How Long Savers Have Before the Rules Change?
You have until 5 April 2027 to use the current cash ISA rules before the new limits apply. The tax year 2026/27 is the final year under the existing allowance. If you are under 65 and want to hold the full £20,000 in cash, you need to act before that date.
The transfer route from a stocks and shares ISA into a cash ISA closes permanently for under 65s on 6 April 2027, regardless of how long the money has already been saved. Many savers assume only new contributions are affected.
In fact, the ban covers existing balances too, so the closing window applies to money saved years ago as well as this year’s allowance.
- Check how much of your current £20,000 ISA allowance is sitting in cash.
- Decide before 5 April 2027 whether to transfer funds between ISA types while the current rules still apply.
- Review whether a stocks and shares ISA or an Innovative Finance ISA suits your long term goals better than cash.
- Speak to your ISA provider or a regulated financial adviser if you are unsure which option fits your circumstances.
Moving before 6 April 2027 keeps those options on the table.
Lifetime ISA Replacement 2027 Explained
The Lifetime ISA will eventually be replaced by a new First Time Buyer ISA, though the launch date has not been confirmed. HM Treasury opened a consultation on the proposal on 23 June 2026.
What does the Consultation Confirm?
The First Time Buyer ISA 2027 proposal will be open to first time buyers aged 18 and over, with no upper age limit. Savers will be able to choose a cash version or a stocks and shares version.
Unlike the Lifetime ISA, there will be no withdrawal charge, and the government bonus will be paid only when a qualifying property is purchased.
What Remains Unconfirmed?
The annual subscription limit, the government bonus rate and the property price cap have not yet been set. The Lifetime ISA bonus stays at 25% for existing holders, and they will not be able to transfer their savings into the new product, though both accounts can be used towards the same home purchase.
Current Lifetime ISA holders can keep saving under the existing rules until the new product launches.
The ISA Allowance Freeze End Date Explained
The £20,000 overall ISA allowance is frozen until April 2031, not 2030 as some sources state. The same end date applies to the £9,000 Junior ISA limit and the £4,000 Lifetime ISA limit.
Widely circulated claim: several savings guides state the ISA allowance freeze runs only until 2030.
Correct position: the freeze on the £20,000 ISA allowance, the £9,000 Junior ISA limit and the £4,000 Lifetime ISA limit runs until April 2031.
Source: HM Revenue and Customs, Tax free savings newsletter 19, November 2025.
This freeze sits alongside a wider freeze on income tax thresholds, also extended to April 2031 at the Autumn Budget 2025. The wider Rachel Reeves cash ISA changes announced at the same Budget reshape how much of that £20,000 can sit in cash specifically.
The ISA allowance 2027/28 figure stays at £20,000, the same level that has applied since 2017. Savers planning years ahead should treat April 2031, not 2030, as the reference point for the current allowance freeze.
What Stays the Same for Junior ISAs in 2027?
The junior ISA 2027 position is straightforward. The Junior ISA allowance is not affected by the 2027 ISA reforms and remains at £9,000 per tax year per child.
- Junior ISA annual limit: Unchanged at £9,000 per child
- Lifetime ISA annual limit: Unchanged at £4,000 until the First Time Buyer ISA launches
- Over 65 cash ISA allowance: Unchanged at £20,000
A child can take control of a Junior ISA from age 16, though funds remain locked until age 18. The account converts automatically into an adult ISA at that point.
Families saving for children do not need to change anything as a result of the 2027 reforms.
What Should Savers Do Before the New Rules Start?
You should review how your current £20,000 ISA allowance is split across cash and investments before April 2027. This matters most if you are under 65 and currently hold the full amount in cash.
- Confirm the current balance and provider for each of your ISAs.
- Compare interest rates on cash ISAs against potential returns from a stocks and shares ISA.
- Check National Savings and Investments products as an alternative for any cash held outside an ISA.
- Set a reminder ahead of 5 April 2027 to make any final decisions under the current rules.
Knowing how many ISAs you can hold at once lets you spread your £20,000 allowance across providers without falling foul of the rules. The right move depends on your own savings picture.
The consultation on the First Time Buyer ISA closes in August 2026, after which further details are expected from HM Treasury.
If you are unsure how the changes apply to your own savings, check official guidance on GOV.UK for the most current figures. Getting this sorted before April 2027 avoids being locked out of options that won’t come back.
Conclusion
The 2027 ISA reforms mark a clear shift in how the government wants UK savers to use their annual allowance. Under 65s have until 5 April 2027 to act under the current rules. After that, the £12,000 cash ISA cap and transfer restrictions make early planning the only way to stay in control of where your money sits.
FAQ
Will the Cash ISA Limit Affect Money Already Saved?
No. The new ISA rules 2027 apply only to new contributions made from 6 April 2027. Money already held in a cash ISA stays tax free and unaffected.
Are Over 65s Affected by the New Cash ISA Limit?
No. Savers aged 65 and over keep the full £20,000 cash ISA allowance. The £12,000 cap applies only to savers under 65.
Can a Stocks and Shares ISA Be Transferred Into a Cash ISA After April 2027?
No, not for under 65s. The transfer will be banned from 6 April 2027 to prevent savers avoiding the lower cash ISA limit.
Will the Lifetime ISA Close for Existing Holders in 2027?
No. Existing Lifetime ISA holders can keep contributing under current rules. The lifetime ISA replacement 2027 plan, called the First Time Buyer ISA, has no confirmed launch date.
Is the Junior ISA Allowance Changing in 2027?
No. The Junior ISA allowance stays at £9,000 per child per tax year. None of the 2027 ISA reforms affects Junior ISAs.
This article is for informational purposes only and does not constitute financial advice. Always consult a regulated financial adviser before making savings decisions.
