Yes, you can open a joint bank account without being married. Banks do not require co-owners to be spouses, relatives, or legally connected in any way. Domestic partners, roommates, friends pooling money for a shared goal, and adult children helping aging parents all share accounts routinely. The setup is simple. The legal and tax consequences are where unmarried co-owners run into surprises, so it’s worth understanding what you’re agreeing to before you sign.
Who Can Open One and What You’ll Need
Any two or more adults can apply together. Each applicant generally needs to be at least 18.1Federal Reserve Board. Does Access to Bank Accounts as a Minor Improve Financial Capability? Evidence from Minor Bank Account Laws
Federal rules require every bank to run a Customer Identification Program before opening an account. Each applicant must independently provide four things: full legal name, date of birth, a residential or business street address, and an identification number.2eCFR. 31 CFR 1020.220 – Customer Identification Program Requirements for Banks For U.S. citizens and residents, the identification number is a Social Security number or Individual Taxpayer Identification Number. If you have neither, some banks accept a passport number with country of issuance, an alien identification card number, or another government-issued ID number.3Consumer Financial Protection Bureau. Can I Get a Checking Account Without a Social Security Number or Drivers License Banks also ask for an unexpired government-issued photo ID such as a driver’s license or passport.
Applications can usually be filed online or in a branch. Both people fill out the same form, which typically asks for employment and income details. Many banks require a small opening deposit that varies by institution and account type.
How Ownership and Access Actually Work
Most joint accounts are opened as “joint tenancy with right of survivorship.” Two features of that structure matter more than anything else on your account paperwork.
Either Person Can Withdraw Everything
p>Every person named on the account can deposit or withdraw any amount at any time, up to the full balance. The bank does not track who contributed what and does not limit anyone to “their share.” If you deposit $5,000 and your co-owner deposits nothing, your co-owner can legally take all $5,000 out without asking you. The bank will honor the request and, under the multiple-party account rules many states have adopted, is protected from liability for paying any party on the account.
Any private agreement you have with your co-owner about who really owns what is between the two of you. The bank won’t enforce it. If your co-owner cleans out funds you consider yours, your only remedy is a legal claim against them personally.
Survivorship Overrides Your Will
When one co-owner dies, the surviving co-owner automatically owns the entire balance. The money doesn’t pass through probate and is not distributed under the deceased owner’s will. This makes joint accounts a simple way to give a specific person immediate access to funds after a death, but it also means you cannot leave your portion of a joint account to anyone else through your estate plan. The survivorship right wins.
Tenancy in Common as an Alternative
Some banks offer “tenancy in common” instead. Each owner holds a defined percentage (50/50, 70/30, or whatever you set), and when one owner dies, their share passes to their own heirs through probate rather than automatically to the surviving co-owner. If you want your portion to go to someone other than your co-owner at your death, ask whether tenancy in common is available before opening the account.
Tax Issues Married Couples Don’t Face
Sharing an account with someone you aren’t married to creates two tax complications spouses filing jointly can ignore.
Interest Income and Nominee Reporting
The bank issues one Form 1099-INT for the account each year, reporting all the interest earned and tied to whichever Social Security number or ITIN is listed first. The IRS initially attributes all the interest to that person.4Internal Revenue Service. General Instructions for Certain Information Returns
If your co-owner earned part of that interest, the person who received the 1099-INT needs to file a separate Form 1099-INT as a “nominee” to reallocate the co-owner’s portion. Spouses filing jointly skip this step; unmarried co-owners do not.4Internal Revenue Service. General Instructions for Certain Information Returns
Gift Tax Exposure
Just adding someone’s name to your account is not a gift for federal tax purposes. A taxable gift happens when your co-owner withdraws money for their own benefit that they didn’t put in and has no obligation to repay. The gift equals whatever they took.5Internal Revenue Service. Instructions for Form 709
For 2026, the annual gift tax exclusion is $19,000 per recipient.6Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill If your co-owner’s personal-use withdrawals from money you funded stay at or below $19,000 in a calendar year, no gift tax return is required. Above that, you have to file Form 709, though tax typically isn’t owed until you’ve used up your lifetime exemption.7Office of the Law Revision Counsel. 26 U.S. Code 2503 – Taxable Gifts
Liability for Each Other’s Debts
Joint ownership means shared financial exposure. What your co-owner does to the account, or what happens to your co-owner outside the account, can reach you.
Overdrafts
If your co-owner overdraws the account, the bank can pursue either of you for the full negative balance. It doesn’t have to split the debt or chase only the person who spent the money. Your co-owner’s overdraft becomes your legal obligation too.
Creditor Garnishments
When a creditor wins a court judgment against your co-owner for an unrelated debt, the creditor can garnish the joint account. The bank generally freezes the account once garnishment papers arrive. Because the whole account legally belongs to both of you, the creditor may reach the entire balance, not just your co-owner’s “half.”
Federal rules provide some protection when Social Security or other federal benefit payments have been deposited to the account, requiring the bank to calculate a protected amount based on recent benefit deposits regardless of which co-owner received them.8U.S. Department of the Treasury. Guidelines for Garnishment of Accounts Containing Federal Benefit Payments
IRS Levies
The IRS can levy a joint account when only one co-owner owes taxes, because the taxpayer has an interest in the account. If the IRS seizes funds that actually belong to the non-liable co-owner, that person can file a wrongful levy claim to get the money back, with interest.9Internal Revenue Service. IRM 5.11.2 Serving Levies, Releasing Levies and Returning Property
Protecting Your Contributions
In many states, a non-debtor co-owner can protect funds from garnishment by proving the money in the account traces to their own deposits rather than the debtor’s. Documentation is everything. Pay stubs, deposit slips, bank statements, electronic transfer receipts, and benefit statements all help establish which funds are yours. Build that paper trail from day one; reconstructing it after a freeze is much harder.
If You or Your Co-Owner Get Government Benefits
Joint accounts can affect Supplemental Security Income eligibility. SSI imposes a resource limit of $2,000 for individuals and $3,000 for couples, and bank balances count.10Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet
For jointly held accounts, the Social Security Administration presumes all the funds belong to the SSI recipient when they are the only claimant on the account. If both co-owners receive SSI, the funds are presumed split equally. You can rebut this presumption with deposit records and a statement from the other account holder showing whose money is actually in the account.11Social Security Administration. Code of Federal Regulations 416.1208 – How Funds Held in Financial Institution Accounts Are Counted Other means-tested programs like Medicaid may apply similar rules, so check with the relevant agency before opening a joint account if you rely on those benefits.
Closing the Account or Taking Someone Off
Ending the arrangement isn’t always as simple as walking away. Whether one co-owner can close the account alone depends on state law and the account agreement. Some banks let a single owner close the account and take the balance; others require every owner to sign.
Removing a co-owner without closing the account is generally harder, and most banks or state laws require the other person’s consent before their name comes off.12Consumer Financial Protection Bureau. Can I Remove My Spouse From Our Joint Checking Account If your co-owner won’t agree and you want out, the practical path is to withdraw your funds, open your own account, and redirect your deposits. Ask your bank about its specific rules before you make a move, because policies vary.