Question to the HM Treasury:

To ask Her Majesty's Government (1) how much money has been invested in individual savings accounts (ISAs) in total, (2) how much money has been invested in ISAs by different age groups, (3) how many individuals have invested in ISAs, and (4) what is the average amount invested in ISAs per person.

HMRC produces an Individual Savings Accounts (ISAs) tables document as part of its Annual savings statistics publication on Gov.uk.

The amount invested in ISAs, how many individuals have invested in ISAs and the average amount invested in ISAs is in table 9.4. This information is on a per account basis; individuals may sign up to multiple ISA accounts.

The number of individuals that have invested in ISAs and average amount invested per person for the 2018 to 2019 tax year can be found in table 9.11.

An age breakdown of the money invested in ISAs can only be made available at a disproportionate cost. However, table 9.11 gives a breakdown of ISA market values by age.

The ISA Tables are found on the GOV.UK website: https://www.gov.uk/government/statistics/annual-savings-statistics