Investments in a Stocks & Shares ISA work like any other investments. But by using a Stocks & Shares ISA, the growth and/or income produced by the investments is free from income tax and capital gains tax.
There is currently a £20,000 limit to how much you can add to your ISA accounts each tax year. This £20,000 can go in one type of account (for example a Stocks & Shares ISA) or be split across multiple types of ISAs, including Stocks & Shares ISAs, Cash ISAs, and Lifetime ISAs.