Need help
681 Points
Joined November 2021
A loan is never an income, regardless of who you got it from.
And whenever you're repaid, as far as your accounts are concerned, it doesn't matter where your brother (or anyone else) got the money from to pay you back. As long as the amount you got back is the same or less than what you lent there's nothing to worry about.
And in case you're not sure of the amounts, you can simply give the money as a gift and then you get it back as a gift. No tax implications on gifts between brothers.