Two unmarried people can open a joint bank account together without any legal complication at the bank’s end. No federal or state law requires co-owners to be married, related, or in any particular relationship. Domestic partners, roommates, friends pooling money for a shared goal, and adult children helping aging parents all share accounts routinely. The application itself is straightforward. What deserves your attention is what comes after — because sharing an account with someone you aren’t married to carries tax and liability consequences that spouses don’t face.
Who Can Open the Account and What You’ll Need
Banks don’t ask for a marriage certificate or proof of any family tie. Any two adults who each meet the bank’s standard requirements can apply. Federal policy generally limits account ownership to people at least 18 years old.1Federal Reserve Board. Does Access to Bank Accounts as a Minor Improve Financial Capability? Evidence from Minor Bank Account Laws
Every bank must run a Customer Identification Program before opening an account. That means collecting four items from each applicant: your 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 Both of you provide all four independently.
For U.S. citizens and residents, the identification number is a Social Security number or Individual Taxpayer Identification Number. If neither applies, 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 To verify identity, banks typically want an unexpired government-issued photo ID such as a driver’s license or passport.
You can apply online or in a branch. Both applicants complete the same form, which asks for employment and income details. Many banks require a small opening deposit. Have your documents in hand before you start.
Either of You Can Withdraw Everything
Most joint accounts are set up as joint tenancy with right of survivorship. While both owners are alive, that structure gives each of you equal access to the full balance. Not half. All of it.
Any co-owner can deposit or withdraw any amount at any time, up to and including the entire balance. The bank doesn’t track who contributed what, and it won’t limit your withdrawals to “your share.” If you deposit $5,000 and your co-owner deposits nothing, your co-owner can still legally take out the full $5,000. The bank will honor the request without calling you for permission.
Any private agreement you make about who really owns what is between the two of you. The bank will not enforce it. If your co-owner drains the account in a way you consider unfair, your recourse is a legal claim against them personally, not against the bank. This is the single biggest reason unmarried co-owners get burned: they treat the account like a shared wallet with invisible dividing lines, and there are no dividing lines.
What Happens When One Co-Owner Dies
With right of survivorship, when one co-owner dies the surviving co-owner automatically becomes sole owner of the entire balance. The money does not pass through probate and is not distributed according to the deceased person’s will. It transfers by operation of law.
For unmarried couples and other non-family co-owners, this cuts two ways. It’s a clean way to make sure a specific person has immediate access to funds after a death, without waiting for an estate to open. But it also means you cannot leave your share of that account to anyone else through your will — survivorship overrides it. If you want your portion to go to a child, sibling, or someone other than your co-owner, ask the bank about a tenancy in common arrangement, where each owner holds a defined percentage and a deceased owner’s share passes to their heirs.
Taxes Get Messier Than They Do for Spouses
The bank issues one Form 1099-INT for the account each year, tied to whichever co-owner’s Social Security number or ITIN is listed first. The IRS initially attributes all the reported interest to that person.4Internal Revenue Service. General Instructions for Certain Information Returns
If your co-owner earned a share of that interest, the first-listed person needs to file a separate Form 1099-INT as a “nominee” to reallocate the co-owner’s portion. Married spouses filing jointly skip this step. Unmarried co-owners don’t.4Internal Revenue Service. General Instructions for Certain Information Returns
Gift tax is the other wrinkle. Just adding someone’s name to your account doesn’t create a taxable gift. A gift happens when your co-owner withdraws money for their own benefit that they didn’t contribute and isn’t expected to be repaid. The amount they took out is the gift.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-benefit withdrawals stay at or below that amount in a calendar year, no gift tax return is required. Above it, you’d file Form 709 to report the gift, though you’re unlikely to owe actual tax unless you’ve already used up your lifetime exemption.7Office of the Law Revision Counsel. 26 U.S. Code 2503 – Taxable Gifts
Your Co-Owner’s Debts Can Reach Your Money
This is the risk that most surprises unmarried co-owners. Joint ownership creates shared exposure to each other’s financial problems, even when only one of you caused the problem.
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 made the withdrawal.
Creditor Garnishments
When a creditor wins a court judgment against your co-owner for an unrelated debt, that creditor can garnish the joint account. The bank typically freezes the funds once garnishment papers arrive. Because the account legally belongs to both of you, the creditor may reach the entire balance, not just some notional half.
If the account receives federal benefit payments like Social Security, federal rules require the bank to calculate a protected amount based on benefit deposits during a lookback period, regardless of which co-owner the payments went to.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 back taxes. Any property in which the taxpayer has an interest is subject to levy, and a jointly owned bank account counts. If the IRS takes funds that actually belong to the non-liable co-owner, that person can file a wrongful levy claim to recover the money, with interest.9Internal Revenue Service. IRM 5.11.2 Serving Levies, Releasing Levies and Returning Property
How to Protect Your Contributions
In many states, a non-debtor co-owner can protect funds from garnishment by proving the money is traceable to their own contributions rather than the debtor’s. Documentation is the whole game. Keep pay stubs, deposit slips, bank statements, electronic transfer receipts, and benefit statements that show which deposits came from you. Build that paper trail while things are calm. Trying to reconstruct it after a freeze is far harder than maintaining it from the start.
Effect on SSI and Other Means-Tested Benefits
If you or your co-owner receive Supplemental Security Income, a joint account can directly affect eligibility. The SSI resource limit is $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 that all funds belong to the SSI recipient if they are the only claimant on the account. If both co-owners receive SSI, the agency presumes an equal split. You can rebut the presumption with deposit records and statements from the other account holder showing the money actually belongs to your co-owner.11Social Security Administration. Code of Federal Regulations 416.1208 – How Funds Held in Financial Institution Accounts Are Counted Medicaid and other means-tested programs may apply similar logic. If you depend on any of these, check with the relevant agency before opening a joint account.
Closing the Account or Removing a Name
Ending a joint arrangement is not always as simple as one person walking away. Whether a single co-owner can close the account depends on state law and the bank’s account agreement. Some banks let one owner close it and withdraw everything; others require signatures from everyone on the account.
Removing a co-owner without closing the account is usually harder. State law or the account agreement typically requires the other person’s consent before you can take their name 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 route is to withdraw your funds, open a new individual account, and redirect your deposits. Call your bank first to confirm what your specific account terms allow, because policies vary.