In the 2019 2020 tax year you can invest up to 20 000 into an isa. To work out what rate a normal fixed savings account would have to pay to beat an isa take the isa rate and multiply it by 1 25 if you re a basic rate taxpayer 1 66 if you re a higher rate taxpayer or 1 82 if you re a top rate taxpayer. This can be invested in cash or stocks and shares or a combination of both.
