Make the most of your interest and understand how tax works.
Cash ISAs are tax-free. So you don't need to pay any tax on the interest earned. Bear in mind you can only save in one cash ISA in a tax year and there are limits on how much you can save. More about ISA allowances.
Most people don’t need to pay tax on their interest from non-ISA savings accounts. This is because of the Personal Savings Allowance.
The PSA is an allowance for how much interest you can earn from non-ISA savings accounts before you have to pay any tax on it. Whether you get a PSA depends on your tax status.