To be honest, if he's making 200k a year and in the 500s he's doing something horribly wrong. I would not trust him until he shows over time that he can handle credit responsibly.
Was wondering if it would hurt or help to put family member on joint loan or if you can do a joint credit card
My score is 680 i make 65,000 yearly
Brother score is 550’s makes 200,000 yearly
Would doing a joint loan help his credit wpuld jos score hurt mine doing a joint loan or would both together help for a loan or credit card
No NO No NO No NO No NO
Do not do this. Take this idea, lock it in a box, throw it in the ocean and never think of this again. Ever.
At 200k per year, I would say that your brother has the resources to repair his own credit. I would not open any joint accounts.