You can add an unlimited number of users to accounts with these subscriptions: XS, S, M, L and XL. For DIY users, unfortunately, there is allowance for only one user.
Here's how to add a user to your account.
1) Login to Squirrel Street and view your receipts.
2) Click on the button to the top right of the screen (the one with a little cog)
3) Click on Settings
4) Goto Manage users
5) Click on the invite user button and fill in the details then click on "Invite".
The person will then receive an email inviting them to the account and to set a password. If they don't receive it, please ask them to check in their spam folder.