An ISA (Individual Savings Account) is a tax-efficient way to save or invest.
Usually, when you have a savings account, you pay income tax on whatever interest you earn. But the interest on a cash ISA isn't taxed, so all the interest you earn, you keep.
Stocks & Shares ISAs also have tax benefits which we've explained in more detail in the tab below.
If you're starting to think about saving, ISAs are a great place to begin.