You can add someone to your savings account at almost any bank or credit union by submitting a new signature card or account modification form, and both people typically need to provide government ID and a taxpayer identification number. The paperwork itself is straightforward. The decision behind it is not. Before you sign anything, be clear on whether you’re making that person a joint owner or an authorized signer, because those are two very different arrangements with very different consequences.
Joint Owner or Authorized Signer
This is the single most important choice in the process, and many people skip past it without realizing there was a choice to make.
A joint owner is treated by the bank as an equal owner of the account. They can deposit, withdraw, or close the account, and when one owner dies, the balance passes directly to the survivor. An authorized signer can make transactions on your behalf but has no ownership stake. Their access ends when you die, and they have no automatic claim to the money.
If your goal is to let a family member help pay bills or run banking errands, an authorized signer arrangement does that without handing over ownership. If the goal is truly shared savings, such as pooling money with a spouse or partner, joint ownership makes more sense. Ask the banker explicitly which arrangement you’re setting up before you sign the card.
Who Qualifies to Be Added
The person you’re adding generally needs to be at least 18, since that’s the age of contract in most states. A handful of states set the threshold at 19 or 21. For minors, most banks require a parent or guardian to open a custodial account rather than adding the child to an adult account.
Under federal identification rules tied to the Bank Secrecy Act, the new person must provide a name, date of birth, address, and taxpayer identification number. A non-U.S. person can substitute a passport number or alien identification card for a Social Security number.1FFIEC BSA/AML Manual. Assessing Compliance with BSA Regulatory Requirements – Customer Identification Program The bank may also run the person through ChexSystems, a reporting service that tracks checking and savings history including involuntary closures and unpaid fees.2Consumer Financial Protection Bureau. Chex Systems, Inc. Someone with accounts closed for cause may be turned down.
What to Bring and How to Do It
Both people should gather the same set of items:
- A current government-issued photo ID such as a driver’s license, state ID, or passport.
- A Social Security number or ITIN, which the bank uses to report interest income to the IRS.3Internal Revenue Service. Taxpayer Identification Numbers (TIN)
- A residential street address, phone number, and email.
- The existing account number.
At a traditional bank, both people usually need to visit a branch together so identities can be verified in person. Booking an appointment beforehand saves time. You’ll sign a new signature card or updated account agreement, and this is the moment to confirm with the banker which arrangement you’re establishing.
Online banks handle the same request through a secure portal, with scanned IDs and electronic signatures. The documentation requirements are the same. After submission, expect a verification period of roughly one to three business days before confirmation arrives by email, mail, or app notification.4Bank of America. Applying for Bank Accounts FAQs Once confirmed, the new person has immediate access.
Fill every field on the form exactly as it appears on your ID. Mismatched names or addresses are the most common reason these requests stall.
What Joint Ownership Actually Means
Adding a joint owner creates joint tenancy with right of survivorship, and two consequences follow.
Either owner can withdraw the entire balance at any time without the other’s permission. The bank treats both names as equal owners regardless of who deposited the money. If your adult child is a joint owner and empties the account, the bank will not stop them and will not reimburse you.
When one owner dies, the survivor automatically receives everything in the account. The money does not pass through probate and is not distributed under the deceased owner’s will. If your will says to divide your assets equally among your three children, the joint account still goes to whichever child is the co-owner, not to all three.
Risks Worth Weighing First
Your Co-Owner’s Creditors
Because each owner has equal legal rights to the whole balance, a creditor with a judgment against your co-owner can potentially garnish the joint account, even for a debt you had nothing to do with. Some states limit that reach to half the balance; others allow the full amount to be taken. This is a frequently overlooked risk when parents add an adult child who carries significant debt.
SSI and Medicaid
If either owner receives Supplemental Security Income, the Social Security Administration presumes the entire balance of a joint account belongs to the SSI recipient unless the recipient can prove otherwise.5Social Security Administration. SSI Spotlight on Financial Institution Accounts With SSI resource limits of $2,000 for individuals and $3,000 for couples, a joint savings account with any real balance can push a recipient over the line.
Medicaid raises a parallel concern. Federal law imposes a 60-month lookback period for asset transfers before someone applies for long-term care coverage.6Office of the Law Revision Counsel. 42 USC 1396p – Liens, Adjustments and Recoveries, and Transfers of Assets Whether adding a name to a joint savings account counts as a disqualifying transfer depends on the account type and state rules. An account where either party can withdraw independently is generally less likely to trigger a penalty than one requiring both signatures, but the analysis is state-specific. Given how much a period of Medicaid ineligibility costs, this is a conversation to have with an elder law attorney before you make the change.
Overdrafts
Both joint owners are equally responsible for any negative balance. If your co-owner overdraws the account, the bank can pursue either of you, and an unpaid overdraft can land on your ChexSystems report and make it harder for you to open accounts elsewhere.
Taxes on a Shared Account
The bank reports all interest earned on the account to the IRS under the primary account holder’s Social Security number on Form 1099-INT. If both owners want to split the interest for tax purposes, the primary filer reports the full amount from the 1099-INT and then subtracts the other person’s share, while the other person reports their portion on their own return.7Internal Revenue Service. U.S. Taxpayer Identification Number Requirement What the IRS wants is for the total to be reported somewhere.
Adding a name to the account is not itself a taxable gift. The gift happens when the co-owner withdraws money from the account for their own benefit, and the amount equals whatever they take out without any obligation to repay you.8Internal Revenue Service. Instructions for Form 709 If a non-spouse co-owner takes more than $19,000 in a calendar year for their own use, you’re required to file Form 709, the gift tax return.9Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Gifts between spouses who are both U.S. citizens are generally unlimited and don’t require a return.
Lighter-Touch Alternatives
If you want someone to have access or inherit the money without the full risks of co-ownership, three alternatives cover most situations:
- A payable-on-death (POD) designation names a beneficiary who inherits the account when you die but has no access while you’re alive. The transfer still bypasses probate.
- A power of attorney authorizes someone to make financial transactions on your behalf. Unlike a joint owner, a POA agent has a fiduciary duty to act in your interest and must keep your money separate from theirs. The authority ends when you die.
- An authorized signer, as covered above, gets transaction access without ownership.
A POD works best when the goal is to transfer money at death without probate. A POA works best when you need help managing your finances during your lifetime, which is a common fit for aging parents and a trusted adult child. Layering these tools with an outright joint account often creates conflicts, so pick the one that matches your actual goal.
Getting Someone Off the Account Later
Removing a joint owner is harder than adding one. In most cases you need the co-owner’s consent, and state law or the bank’s account agreement typically blocks unilateral removal.10Consumer Financial Protection Bureau. Can I Remove My Spouse From Our Joint Checking Account If the co-owner won’t cooperate, your practical option is usually to withdraw your share and close the account, which either joint owner can generally do without the other’s permission, then open a new account in your name alone.11Consumer 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?
That asymmetry is the reason to slow down at the front end. Easy to add. Hard to remove. Decide accordingly.