Free UK ISA tool
ISA allowance calculator
Check the allowance left after contributions to Cash, Stocks and Shares, Lifetime and Innovative Finance ISAs in the current tax year.
2026 to 2027 tax year
Check your remaining ISA allowance
Enter the total paid into your adult ISAs since 6 April 2026. Use contributions, not the current value of your investments.
Add this year's ISA contributions
Enter what you have paid into ISAs this tax year to see allowance room before adding more money.
Use subscriptions paid in this tax year across adult ISA types; do not treat current portfolio value as allowance used.
Adult ISA rules can change. Source checked 2026-08-07: GOV.UK Individual Savings Accounts. This is general information, not tax or financial advice.
Adult ISA types
What ISA Lens covers
The allowance can be shared across four adult ISA types. Portfolio analysis in ISA Lens is specifically for Stocks and Shares ISA holdings.
Shares, funds, ETFs, and investment trusts held inside a UK ISA wrapper.
Manual and CSV portfolio entry is live. Exact fund look-through appears only for holdings backed by verified constituent data.Check official rulesCash savings interest and short-term cash holdings rather than market exposure.
ISA Lens includes Cash ISA subscriptions in allowance room, but does not compare rates or providers yet.Check official rulesA long-term ISA wrapper with its own contribution limit and withdrawal rules.
ISA Lens can count Lifetime ISA subscriptions toward allowance room, but does not judge LISA suitability.Check official rulesLending or crowdfunding-style ISA products where platform and credit risk matter.
Not covered in the first release; ISA Lens does not compare IFISA yield, defaults, platforms, or liquidity.Check official rulesWrapper guidance checked 2026-08-07. ISA Lens does not compare Cash ISA rates, Lifetime ISA suitability or Innovative Finance ISA products.