How Much Can You Save In An ISA

The ISA allowance is a cap on the total amount of new money you can add to your ISAs within a single tax year. It applies to new subscriptions across your ISAs combined, not to each account separately. Growth, interest and dividends earned inside an ISA do not count against the allowance, and money already inside the wrapper from previous years does not use up the current year's allowance. Because the government reviews the allowance periodically, the figure should always be checked for the tax year you are saving in.

Several ISA types exist, including cash ISAs, stocks and shares ISAs and other variants, and the overall allowance is typically shared across them. Some ISA types have their own sub-limits or eligibility conditions layered on top of the overall allowance, such as age requirements or caps specific to that product. Rules about how many ISAs of a given type you can pay into in one tax year have also changed over time, so it is important to confirm the current position rather than rely on older articles.

Before adding money, confirm the current tax year's allowance from official government guidance and note the tax year start and end dates so contributions land in the intended year. Keep a record of subscriptions across all providers, since the allowance is tracked across your accounts, not per provider. If you are comparing ISA providers, check each firm's current terms for fees, transfer policies and product-specific limits directly in their documents rather than relying on summaries.