What is the Cash ISA allowance cap in 2026/2027?

For savers under age 65, the annual Cash ISA allowance is capped at £12,000 per tax year (out of the total £20,000 overall ISA allowance). Savers aged 65 and over retain the full £20,000 Cash ISA limit.

What is the 22% tax charge on Stocks & Shares ISA cash interest?

A 22% tax charge applies to uninvested cash interest earned inside Stocks & Shares ISAs to prevent individuals holding large cash reserves tax-free outside of Cash ISA limits.

Can I hold multiple ISAs of the same type in the same tax year?

Yes. Under flexible ISA rules, you can open and subscribe to multiple ISAs of the same type (e.g. two Cash ISAs with different providers) within the same tax year, provided your total subscriptions stay within your overall £20,000 limit.

What is the Lifetime ISA (LISA) limit and government bonus?

You can pay up to £4,000 per tax year into a Lifetime ISA (LISA) if you are aged 18 to 39. The UK government adds a 25% bonus (up to £1,000 per year) toward buying your first home (up to £450,000) or retirement at age 60.

What is the Cash ISA allowance cap in 2026/2027?

For savers under age 65, the annual Cash ISA allowance is capped at £12,000 per tax year (out of the total £20,000 overall ISA allowance). Savers aged 65 and over retain the full £20,000 Cash ISA limit.

What is the 22% tax charge on Stocks & Shares ISA cash interest?

A 22% tax charge applies to uninvested cash interest earned inside Stocks & Shares ISAs to prevent individuals holding large cash reserves tax-free outside of Cash ISA limits.

Can I hold multiple ISAs of the same type in the same tax year?

Yes. Under flexible ISA rules, you can open and subscribe to multiple ISAs of the same type (e.g. two Cash ISAs with different providers) within the same tax year, provided your total subscriptions stay within your overall £20,000 limit.

What is the Lifetime ISA (LISA) limit and government bonus?

You can pay up to £4,000 per tax year into a Lifetime ISA (LISA) if you are aged 18 to 39. The UK government adds a 25% bonus (up to £1,000 per year) toward buying your first home (up to £450,000) or retirement at age 60.

Home/Uk/Isa Allowance Cash Cap Tax Calculator

HMRC ISA Rules 2026/27Cash ISA £12k Limit£20k Total Allowance

UK ISA Allowance & Tax Calculator 2026

Check your Cash ISA (£12,000 under-65 cap) and Stocks & Shares ISA (£20,000 limit) subscription limits, and compute tax impact on uninvested cash interest.

Capital Gains Tax Tool →HMRC Tax Hub →

ISA Allowance & Allocation Tool

Check age-based Cash ISA limits and overall £20,000 subscription rules

Your Age

Cash ISA Amount (£)

Stocks & Shares ISA (£)

ISA Allowance Status:

Cash ISA Limit for Age 38

£12000

Over Limit by £2000

Total ISA Allowance Used

£20000 / £20,000

Complete Guide to HMRC ISA Types & Tax Rules

Individual Savings Accounts (ISAs) allow UK tax residents to earn tax-free interest, dividends, and capital gains. All UK adults have an annual overall ISA allowance of £20,000 per tax year (6 April to 5 April).

ISA Types & Annual Allowances

ISA Type	Annual Subscription Limit	Key Features
Cash ISA	£12,000 (Under 65) / £20,000 (Age 65+)	100% tax-free interest; instant or fixed-rate savings
Stocks & Shares ISA	Up to £20,000 (Minus Cash ISA amount)	Tax-free capital gains & dividends from global equities/funds
Lifetime ISA (LISA)	£4,000 (Counts towards £20k overall)	25% government bonus (up to £1,000/yr) for first home or age 60
Junior ISA (JISA)	£9,000 (Separate limit for children under 18)	Locked until child turns 18; managed by parent/guardian

Frequently Asked Questions

Yes. Official ISA transfers from previous tax years do not count toward your current annual £20,000 subscription limit.

Do not attempt to fix over-subscriptions yourself. HMRC will contact you after the end of the tax year to instruct your ISA provider to refund the excess subscription and void tax relief on the overpaid portion.

Yes. Any individual aged 18 or over who is UK tax resident (under the Statutory Residence Test) can open and subscribe to UK ISAs. Non-residents cannot open new ISAs or add new subscriptions.