It’s possible you’ll unknowingly owe tax to HMRC when you break this rule.

There’s a restrict on how a lot you possibly can have in your ISAs (Picture: Getty)
Savers within the UK should persist with an vital £20,000 rule. An Particular person Financial savings Account (ISA) permits individuals to economize and earn curiosity that’s tax-free. Nonetheless, there’s a yearly restrict on how a lot you possibly can have in an ISA.
At present, this restrict is £20,000 for the 12 months 2025/26. Though the brand new monetary 12 months begins in April, this restrict is about to stay in place for one more 12 months.
This rule applies to several types of ISAs, together with Money, Shares and Shares, Lifetime, and Revolutionary Finance ISAs. On the GOV.UK web site it says: “Within the 2025 to 2026 tax 12 months, the utmost it can save you in ISAs is £20,000.”
It additional explains: “Each tax 12 months it can save you as much as £20,000 in a single account or cut up the allowance throughout a number of accounts. The tax 12 months runs from 6 April to five April.”

An Particular person Financial savings Account (ISA) permits individuals to economize that’s tax-free (Picture: Getty)
GOV.UK provides: “Your ISAs won’t shut when the tax 12 months finishes. You’ll maintain your financial savings on a tax-free foundation for so long as you retain the cash in your ISA accounts.”
Nonetheless, you will need to word that in April 2027, the Money ISA restrict is about to cut back to £12,000 for these below the age of 65, which shall be defined beneath.
There are 4 kinds of ISA:
- Money ISA: Just like a financial savings account however tax-free
- Shares and Shares ISA: Permits investing in shares, funds, and bonds
- Lifetime ISA (LISA): For purchasing a primary dwelling or retirement, with a 25% Authorities bonus on contributions
- Revolutionary Finance ISA: Permits peer-to-peer lending
The £20,000 restrict applies to the collective teams of ISAs. However there are limits on how a lot you possibly can pay into one Lifetime ISA in a tax 12 months. The utmost you possibly can pay into that is £4,000.
GOV.UK shares the next examples of how the financial savings might be cut up:
- You can save £15,000 in a money ISA, £2,000 in a shares and shares ISA and £3,000 in an modern finance ISA in a single tax 12 months
- You can save £11,000 in a money ISA, £2,000 in a shares and shares ISA, £3,000 in an modern finance ISA and £4,000 in a Lifetime ISA in a single tax 12 months
- You can save £10,000 in a single money ISA, £3,000 in one other money ISA and £7,000 in a shares and shares ISA in a single tax 12 months
Adjustments for 2027
From April 6, 2027, the annual Money ISA restrict for individuals below 65 shall be lowered to £12,000 as a part of a brand new two-tier system designed to encourage investing. Though the full ISA allowance is about to stay at £20,000, the remaining £8,000 should be positioned in Shares and Shares or Revolutionary Finance ISAs.
The adjustments, summarised by Nationwide, are:
- You’ll be capable of put as much as £12,000 in a money ISA every tax 12 months
- The remainder – as much as £8,000 – might go right into a shares and shares ISA
- Or, you possibly can select any mixture that fits you, so long as you don’t exceed £12,000 in a money ISA and your complete throughout each kinds of ISAs doesn’t go over the £20,000 complete ISA allowance
- The annual restrict for shares and shares ISAs stays at £20,000
- For these aged 65 or over, these adjustments don’t apply. The complete £20,000 annual ISA allowance will stay, which can be utilized throughout all ISAs
What to do when you go over the £20,000 restrict
HMRC will doubtless contact you after the tax 12 months ends to resolve the problem. It’s possible you’ll be requested to take away the surplus funds and any curiosity/good points earned on that particular extra.
The curiosity or earnings generated by the cash exceeding the restrict could grow to be taxable. You possibly can contact your ISA supplier to establish the over-subscription and rectify it.
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