Do I need to pay in a minimum amount or keep a minimum balance?

No. There’s no minimum amount you need to pay in and no minimum balance you need to keep. 

Any money you hold in your Biscuit current account will earn interest – either 1% AER* (1% gross**) variable, or 2.75% AER* (2.72% gross**) variable if you choose extra balance interest as your benefit. 

You also don’t need to make a minimum number of payments or transactions, and there’s no monthly account fee.