Can we have pots with a Biscuit joint bank account, or a joint savings account?

Not yet. You can't open a pot in a joint account at the moment, and Zopa doesn't offer joint savings accounts. You can still save with Zopa on your own, in your own name, and keep using your joint bank account for everyday spending and shared bills. You also earn interest on your joint account balance and can choose to boost it as your benefit.

Can you have a joint ISA?

No. An ISA can only be held in one person's name, under HMRC rules. This is the case with any provider. If you want to know more, see What's a Cash ISA?

Can I pay into my own ISA or savings from the Biscuit joint bank account?

Yes, you can pay into your own ISA or savings from any bank account in your name, including joint bank accounts.