You do not have to be married to have a joint bank account. Banks will open a shared account for any two or more adults who can each prove their identity, whether you are a couple, siblings, a parent and adult child, roommates, or business partners. What the bank checks is each applicant’s identification and legal standing, not the relationship between you.
Who Can Be a Co-Owner
Federal banking policy generally requires each account holder to be at least 18 to open an account on their own. Minors can appear on a joint account through a custodial arrangement with a parent or guardian, but they usually cannot be independent co-owners until they turn 18. A handful of state-chartered banks allow minors as young as 15 under state-specific rules, and those exceptions vary.
Every applicant also needs valid legal status in the United States. Banks confirm this through identity documents and by screening names against government watchlists to meet federal anti-money laundering rules.1FFIEC Bank Secrecy Act/Anti-Money Laundering InfoBase. Assessing Compliance With BSA Regulatory Requirements Those checks look the same whether you are married to your co-owner, related to them, or have no personal connection at all.
What Each Person Needs to Provide
Each co-owner brings a government-issued photo ID such as a driver’s license, U.S. passport, or military ID. Some banks also accept foreign passports or consular identification cards. You each supply a Social Security number or Individual Taxpayer Identification Number so the bank can report interest for tax purposes,2Consumer Financial Protection Bureau. Checklist for Opening a Bank or Credit Union Account plus proof of address like a utility bill or lease.
If One Co-Owner Is Not a U.S. Citizen
A nonresident co-owner generally files IRS Form W-8BEN with the bank to certify foreign status for withholding. If they lack a Social Security number, they can apply for an ITIN using Form W-7. When every joint owner files a W-8BEN, the account is treated as foreign-owned for withholding; if even one owner provides a Form W-9, the whole account is treated as U.S.-owned.3Internal Revenue Service. Instructions for Form W-8BEN
How Access Works Once the Account Is Open
Most joint accounts are set up as joint tenancy with right of survivorship. Under that structure, every co-owner has full legal access to the entire balance. Any one owner can deposit, withdraw, transfer, or spend the money without asking the others. The bank does not track who contributed what or cap withdrawals to each person’s share.
The survivorship piece takes effect when a co-owner dies. The remaining balance passes automatically to the surviving owner or owners, outside probate, once the bank sees a death certificate. This transfer happens regardless of what the deceased owner’s will says. None of it depends on marriage.
The One Place Marriage Actually Matters
There is a single form of joint ownership that requires a marriage: tenancy by the entirety. Roughly 16 states and the District of Columbia allow married couples to hold bank accounts and other personal property this way. The account is treated as owned by the couple as one legal unit rather than by two separate people, and the practical payoff is creditor protection.
Under standard joint tenancy, if one co-owner has an unpaid debt, a creditor may reach the joint account. Under tenancy by the entirety, the account is generally shielded from the individual debts of either spouse; a creditor can only reach it for a debt both spouses owe together. Unmarried co-owners cannot elect tenancy by the entirety no matter which state they live in. If that shielding is what you were hoping to get out of a joint account, marriage is the gating requirement. For every other purpose, a plain joint account works the same for anyone.
Risks to Weigh Before Opening One With Anyone
Sharing an account means sharing exposure. A few risks are worth understanding before you sign, regardless of your relationship to the other person.
Creditor Garnishment
If your co-owner owes a court judgment, defaulted loan, or tax lien, a creditor may garnish the joint account even though you owe nothing. Because each co-owner has equal legal rights to the whole balance, courts generally treat the full account as available to satisfy one owner’s debt. Some states limit the garnishment to the debtor’s presumed share, often 50 percent; others allow the creditor to seize the entire balance. A non-debtor co-owner can sometimes reclaim funds by proving which deposits were theirs, but that takes detailed records and time.
Bank Set-Off
If one co-owner falls behind on a loan or credit card at the same bank that holds the joint account, the bank itself may take money directly from the account to cover the delinquent debt. This is called a right of set-off. It happens without a court order, and most account agreements authorize it. Before opening a joint account, check whether either of you already has debts at that bank.
Overdraft Liability
When one co-owner overdraws the account, both owners can be held responsible for the negative balance. Many account agreements make all co-owners jointly liable for overdrafts, even those caused entirely by another owner. If the bank cannot recover the amount, it may report both owners to consumer reporting agencies, which can affect your ability to open accounts elsewhere.
Either Owner Can Empty and Close the Account
Removing a co-owner from a joint account usually requires that person’s written consent; state law or the account agreement generally prevents one owner from unilaterally dropping the other.4Consumer Financial Protection Bureau. Can I Remove My Spouse From Our Joint Checking Account Closing the account is different. At most banks, either co-owner can withdraw the full balance and close the account without the other’s agreement.5Consumer Financial Protection Bureau. A Joint Checking Account Owner Took All the Money Out and Then Closed the Account Without My Agreement – Can They Do That If the relationship sours, either person can walk away with the money. Keep that in mind before you open one with anyone, married or not.
FDIC Insurance Adds Up the Same Way for Everyone
Joint accounts get their own FDIC insurance coverage separate from individual accounts, so opening one can raise the total amount of your deposits that are protected. Each co-owner is insured up to $250,000 for their share of all joint accounts at the same bank,6FDIC. Joint Accounts and the FDIC assumes each co-owner holds an equal share unless the bank’s records say otherwise.7FDIC. Your Insured Deposits
A joint account with two co-owners is therefore insured up to $500,000 total, $250,000 for each person’s half. If those same two people also hold individual accounts at the same bank, those individual accounts are covered separately under the single-account ownership category. That stacking works the same for married couples, unmarried couples, siblings, or business partners.