Glossary · UK
What is Flexible ISA?
A type of ISA that allows you to withdraw money and re-subscribe the same amount in the same tax year without it counting against your annual £20,000 ISA allowance.
Full Definition
A flexible ISA permits withdrawals and re-subscriptions within the same tax year without the withdrawn amount reducing your remaining annual subscription capacity. For example, if you subscribe £15,000 and withdraw £5,000, a standard ISA leaves you with only £5,000 remaining allowance; a flexible ISA restores the £5,000 giving you £10,000 remaining capacity. Flexibility resets at the start of each new tax year and applies only within the same ISA product — you cannot withdraw from one ISA and replace in another. Not all providers offer flexible ISAs; Lifetime ISAs and Help to Buy ISAs are never flexible. The annual ISA subscription limit is £20,000 for 2026/27.