How to Transfer Stock From an Individual to a Joint Account

To transfer stock from an individual to a joint account, you choose how the joint account will be titled, open it (at your current brokerage or a new one), and submit a transfer authorization so the shares move in-kind into the new account under the new ownership. The paperwork is routine. The decisions around it are not: adding a co-owner is a gift for federal tax purposes, it changes how the shares pass at death, and it exposes the holdings to risks you don’t have today. Settle the ownership structure first, then handle the mechanics.

Pick the Joint Ownership Type First

How you title the account controls who can act on it, what happens when one owner dies, and whether creditors of your co-owner can reach the shares. Four structures cover almost every situation.

Joint Tenants With Right of Survivorship (JTWROS)

The default at most brokerages. Both owners hold an equal, undivided interest in every share, and when one owner dies the survivor absorbs the full account outside of probate. The deceased owner’s will has no say over these assets. If you want the stock to pass to someone other than your co-owner at death, this is the wrong structure.

Tenants in Common

Each owner can hold a different percentage: 70/30, 60/40, whatever you agree to. A deceased owner’s share does not pass to the survivor; it flows through the estate under the will or state intestacy rules. More control over where your share ends up, but the surviving co-owner may end up sharing the account with an heir they didn’t pick.

Community Property

Available only to married couples in the nine states that recognize it. Assets acquired during the marriage are treated as equally owned. The tax payoff comes at death: the surviving spouse gets a full step-up in basis on the entire asset, not just the deceased spouse’s half.¹ On highly appreciated stock, that difference can save a surviving spouse a substantial amount in capital gains tax.

Tenancy by the Entirety

Available only to married couples, and only in about half the states. It works like JTWROS, with one important addition: neither spouse can sell, transfer, or encumber the holdings without the other’s consent. That mutual-consent requirement is also what gives it creditor protection, since a creditor of only one spouse generally cannot seize assets held this way. The protection ends at divorce or at the first death. Not every brokerage offers this titling for investment accounts, so ask specifically.

Expect a Gift to the New Co-owner

When you add someone to your brokerage account, the IRS treats it as a gift to them. In a standard JTWROS arrangement, the gift equals half the fair market value of the stock on the date of the transfer, even though no money changes hands and nothing is sold.

Annual Exclusion and Lifetime Exemption

For 2026, you can give any individual up to $19,000 without a gift tax filing requirement.² If the total value you’re transferring in is $38,000 or less, the gifted half falls inside the exclusion and you have nothing further to do.

When the gifted half exceeds $19,000, the excess eats into your lifetime unified gift and estate tax exemption, which is $15,000,000 per individual for 2026.² Most people never exhaust it, but every dollar used now reduces what shelters your estate later.

When Form 709 Is Required

Any gift above the annual exclusion requires IRS Form 709, even when the lifetime exemption absorbs the excess and no tax is actually owed.³ The form reports the use of your lifetime credit. Skipping it when it’s required can lead to penalties and interest later.

Form 709 is due by April 15 of the year after the transfer.³ Transfer $80,000 in stock into a JTWROS account in 2026, and the gifted half is $40,000; you’d file by April 15, 2027, reporting the $21,000 that exceeds the exclusion. That $21,000 reduces your remaining lifetime exemption to $14,979,000.

Spouses

Transfers between spouses who are both U.S. citizens are covered by the unlimited marital deduction. No gift tax, no Form 709, regardless of amount.

The rules change if your spouse is not a U.S. citizen. The annual exclusion for gifts to a non-citizen spouse is $194,000 for 2026 instead of the standard $19,000.⁴ Anything above that threshold means a Form 709 and uses lifetime exemption. Couples who assume the marital deduction is automatic get caught by this.

Make the Transfer

Once titling is settled, the mechanical move is simple. The goal is an in-kind transfer: the actual shares move to the new joint account without being sold. Selling first would trigger capital gains for no reason.

Same Brokerage

If the joint account will live at the same firm that holds your individual account, the brokerage handles it with its own paperwork. You fill out a joint account application and a transfer authorization form, and the firm retitles the shares under the new ownership. These moves often settle within a few business days.

Different Brokerages

Moving shares between firms uses the Automated Customer Account Transfer Service (ACATS), an electronic system operated by the National Securities Clearing Corporation.⁵ You submit a Transfer Initiation Form to the receiving firm, which initiates the electronic request. A clean ACATS transfer should complete within six business days.⁶ Manual transfers, which happen when one institution doesn’t participate in ACATS, have no set timeline and can take considerably longer.

Medallion Signature Guarantee

If physical stock certificates are involved, you’ll need a Medallion Signature Guarantee, a specialized authentication stamp from a participating financial institution that guards against forged transfer requests.⁷ Some firms also require one for high-value electronic transfers. Not every bank branch offers Medallion guarantees, so call ahead.

Verify the Cost Basis After Settlement

The receiving brokerage must carry the original cost basis of every transferred share forward. Firms pass this information electronically through the DTCC’s Cost Basis Reporting Service.⁸ Errors happen. Once the transfer settles, compare the cost basis on your new account statement against your own records. A wrong basis will cost you (or occasionally save you) real money when you eventually sell.

What Happens to the Cost Basis

The tax treatment of transferred stock differs sharply depending on whether a co-owner received it from you during life or inherited it at your death. This is where people quietly lose the most money.

Carryover Basis on Gifted Shares

Transferring stock into a joint account gives your co-owner a carryover basis on their half: they inherit your original purchase price, not the current market value.⁹ If you bought 200 shares at $20 for a total basis of $4,000, then transferred the stock into a JTWROS account when it was worth far more, each of you effectively holds 100 shares at a $2,000 basis. When your co-owner sells, they owe capital gains on the difference between $2,000 and the sale proceeds for their half.

Depreciated Stock Loses Its Loss

If the stock has dropped below what you paid, your co-owner’s basis follows a split rule: for calculating a gain they use your original (higher) basis, and for calculating a loss they use the lower fair market value on the date of the gift.⁹ A sale between the two numbers produces no gain or loss at all. The practical consequence: transferring underwater stock into a joint account can permanently destroy a tax loss you could have claimed yourself. Sell first if you want the loss.

Compare This to Letting Someone Inherit

Property acquired from a decedent receives a step-up in basis to fair market value at the date of death. That wipes out all the gain that accumulated during the decedent’s lifetime. For a JTWROS account between spouses, only the deceased spouse’s half (typically) gets the step-up; the survivor’s half keeps the original carryover basis, leaving a blended basis on the combined holding. Community property avoids this split: the survivor’s half also qualifies for the step-up, resetting the entire asset to current fair market value.¹ If the plan is for a spouse or child to end up with the stock anyway, transferring now can cost far more in future capital gains than simply letting them inherit it later.

Risks You Can’t Easily Undo

Adding someone to your brokerage account gives them real ownership rights, and taking those rights back is not simple.

Either Owner Can Clean Out the Account

In most joint accounts, either owner can sell securities and withdraw the entire balance without the other’s permission.¹⁰ You may have legal recourse after the fact, but the brokerage will not block a co-owner from acting alone. This is the biggest practical risk of a JTWROS account, especially with a non-spouse co-owner. Tenancy by the entirety, where available, cures it by requiring both spouses to sign.

Your Co-owner’s Creditors

Once your co-owner has a legal interest in the account, their creditors may be able to reach it. A lawsuit, bankruptcy, or judgment against them puts their share, and in some states more than their share, at risk, even though you funded the whole account. Tenancy by the entirety shields against the individual debts of one spouse, but only for married couples in states that recognize it, and only until divorce or the first death.

Treat the Transfer as Permanent

Moving the stock back into your name later is itself a gift from your co-owner to you, with its own reporting consequences. If the relationship deteriorates (divorce, family dispute, a business falling-out), unwinding the joint account is messy and expensive. Decide as though the move is one-way, because for tax purposes it largely is.

Think Hard Before You Transfer If Medicaid Is a Possibility

If you or the person you’re adding might apply for Medicaid long-term care benefits within the next five years, this transfer can create eligibility problems. Medicaid uses a 60-month look-back when someone applies for nursing home coverage, reviewing asset transfers made during that window for anything given below fair market value.¹¹ A transfer that violates the rules triggers a penalty period during which Medicaid will not pay.

How the account is captioned matters. Adding a co-owner with an “and” designation, requiring both signatures, is generally treated as giving away resources and runs into the look-back rules. Adding someone with an “or” designation, where either person can act alone, typically does not. For married couples, Medicaid treats assets as jointly held regardless of titling, but the non-applicant spouse keeps a limited community spouse resource allowance while the applicant’s countable assets must fall below a much lower threshold. If long-term care is on the horizon, see an elder law attorney before you move the shares.

1
Office of the Law Revision Counsel. 26 U.S. Code 1014 – Basis of Property Acquired From a Decedent
2
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
3
Internal Revenue Service. Instructions for Form 709 (2025)
4
Internal Revenue Service. Frequently Asked Questions on Gift Taxes for Nonresidents Not Citizens of the United States
5
FINRA. Customer Account Transfers
6
U.S. Securities and Exchange Commission. Transferring Your Brokerage Account: Tips on Avoiding Delays
7
U.S. Securities and Exchange Commission. Medallion Signature Guarantees: Preventing the Unauthorized Transfer of Securities
8
DTCC. Cost Basis Reporting Service (CBRS)
9
Office of the Law Revision Counsel. 26 U.S. Code 1015 – Basis of Property Acquired by Gifts and Transfers in Trust
10
Consumer 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?
11
CMS. Transfer of Assets in the Medicaid Program – Important Facts for State Policymakers