To make sure you have the correct information, I would refer you to a loan officer with that question. Banks have so many rules, you just need to check with them. Joint accounts may be "proof" of income, per se, but since it is joint, the other person is in it for at least half, right? If you mean to show it in order to show that your pay check is directly deposited to the account, then the answer is probably "yes". You need to ask a loan officer anyway because you will probably being taking a loan, right? I can give you the name of a loan officer if you want. Just email me and I will send it to you. You don't need to work with me, etc., etc. to have me give you the information, by the way! I just don't want to put the loan officer's name out here without her permission. She doesn't mind my referrals, obviously! Good luck.