1Know what joint ownership means
Both owners can usually deposit, spend and withdraw the whole balance, and often close the account, without asking the other. The bank does not check whose paycheck the money came from. Read the account agreement and only open one with someone you trust.
2Decide what the joint account pays for
A common setup keeps your own accounts and adds one joint account for rent, groceries, utilities and shared savings. Personal spending stays in your own accounts. Write down which bills come out of the joint account so nothing is paid twice.
3Agree how much each of you puts in
Add up a month of shared bills and a small buffer. Split it equally, or by income so you each put in the same share of your pay. Schedule the transfers for the day after payday so the bills are covered before they are due.
4Plan for a breakup or a death
If you split up, either owner can usually empty the account, so agree how you would divide the balance and close it. Most joint accounts pass to the surviving owner when one owner dies. FDIC insurance covers each co-owner's share up to $250,000 per bank, separately from their own accounts.
Try it with your numbers
Enter your shared bills as the rent and both incomes to see what each of you puts in.
Work out each deposit by incomeFrequently asked questions
Do we need to be married to open a joint account?
Usually not. Banks generally let two adults open a joint account together. Check what your bank asks for before you go.
Can my partner take all the money out of a joint account?
In most cases, yes. Either owner can usually withdraw the full balance. Your account agreement and state law decide the details, so read them before you open one.
Further reading
CFPB: Can a joint account owner take all the money out? ↗CFPB: What happens to a joint account when an owner dies ↗FDIC: How joint accounts are insured ↗Educational examples, not individual financial advice.