W-9 for a joint account
A joint account gets one W-9 with one name and one taxpayer identification number on it, even though two or more people own the money. The form wants the actual owner. Where the funds are combined and no single owner can be picked out, it wants the first individual listed on the account.
Two people open a savings account. The bank sends a W-9. The form has one Line 1, one Part I and one signature line, and there are two of you. Nothing on the face of the form explains what to do about that, because the explanation lives on page 5, inside the What Name and Number To Give the Requester table and its footnotes. This page takes the joint-account rows of that table and works through what they mean in practice: which of you goes on Line 1, why one name gets a circle drawn around it, which of you signs, and what to do next January when the 1099 turns up addressed to one person.
The actual owner, the circled name, one signature
- Whose name on Line 1
- The actual owner of the account
- If the funds are combined
- The first individual listed on the account
- Whose number in Part I
- The same person, and only that person
- Extra instruction
- List that person first and circle their name
- If no name is circled
- The number is treated as the first name listed
- If only one holder has an SSN
- That person’s number must be furnished
- Who signs
- Only the person whose TIN is shown in Part I, where a signature is required
Start with the actual owner
The table’s language for row 2 is careful. For two or more individuals holding a joint account, you give the name and SSN of “the actual owner of the account or, if combined funds, the first individual on the account.” Two tests, in order.
The actual owner test comes first and it is a question of substance. Suppose an adult daughter is added to her father’s savings account so she can pay his bills, and every dollar in it came from him. The account is joint on paper, the money is his, and the interest is his income. His name and his SSN belong on the form. Adding a co-signer for convenience does not move the tax ownership of the funds, and the form does not ask you to pretend otherwise. The same reasoning runs the other way: a parent listed on a young adult’s account purely as a backstop is not the owner of the balance.
The combined-funds test is the fallback. Where both of you have paid money in, drawn money out, and nobody could sensibly say whose dollars are whose, the form stops trying to trace ownership and takes the first individual listed on the account. Most ordinary joint accounts land here. It is a tie-break, and it is deliberately mechanical so that the answer does not depend on anyone’s reconstruction of a decade of deposits.
Whichever test applies, the outcome is the same shape: the payer ends up holding a single name and TIN pair for the account, and the IRS matches that pair against its records. Two SSNs in Part I is not an available answer. There is one box and it takes nine digits. Which number goes where
Circle the name. The default if you do not is unhelpful
Footnote 1 to the table asks you to do something the form itself never mentions: list first and circle the name of the person whose number you furnish. On a printed W-9 that means drawing an actual circle. Requesters who use a substitute form sometimes replace it with a checkbox or a “primary holder” field, which achieves the same thing.
Then read the note underneath the footnotes, which is the part people skip:
The form’s own note is short and it decides real cases: where more than one name is listed and none of them is circled, the number will be considered to be that of the first name listed. So if you write both names on Line 1, furnish the second holder’s SSN, and circle nothing, you have handed the requester a mismatched pair and a default that points at the wrong person. A CP2100 notice and a B notice are the usual way you find out.
The cleanest version of Line 1 for a joint account is simply the name of the person whose SSN you are about to enter in Part I. One name, no circle needed, no ambiguity to resolve. Add the second holder only if the requester’s form has somewhere for them to go.
When only one of you has a Social Security number
This case has a hard answer rather than a judgment call. Footnote 1 finishes with a sentence that overrides the ordering rules above: if only one person on a joint account has an SSN, that person’s number must be furnished. Not preferred. Must.
It comes up more than you would expect. One spouse is a citizen and the other holds an ITIN, or is waiting on an SSN application, or is a nonresident alien who should not be certifying U.S. person status at all. The holder with the SSN goes on Line 1, in Part I, and on the signature line. If neither holder is a U.S. person, a W-9 is the wrong document entirely and the account needs a Form W-8.
Who signs, and when a signature is even required
Part II of the form settles this in one sentence: for a joint account, only the person whose TIN is shown in Part I should sign, when required. The other holders are not signatories to the certification and adding their signatures does not strengthen it.
The “when required” qualifier does real work, and it varies by what is being paid.
| Payment type | Signature required? |
|---|---|
| Interest, dividend, broker and barter exchange accounts opened after 1983 | Yes. The form says you must sign or backup withholding will apply |
| Interest, dividend and barter exchange accounts opened before 1984, broker accounts active during 1983 | Correct TIN required, signature not required |
| Real estate transactions | Yes. You must sign. Detail |
| Other payments, including rents and nonemployee compensation | Correct TIN required, signature not required unless you were notified of a previously incorrect TIN |
| Mortgage interest, debt cancellation, 529 and ABLE accounts, IRA and HSA activity, pension distributions | Correct TIN required, signature not required |
Most joint accounts that generate a W-9 request are bank or brokerage accounts, which sit in the first row. So for the everyday case the signature is mandatory, and it has to be the signature of the holder whose number is in Part I. Note also that the form permits a withholding agent to ask for a signature even where items 1, 4 and 5 say one is not needed, and most of them do ask. What you are certifying when you sign
Married couples
Spouses get the largest share of joint-account W-9 requests and the smallest share of the consequences. The mechanics are identical: one name, one SSN, one signature. What differs is that the downstream stakes are usually close to zero, because a couple filing a joint return reports the income on one Form 1040 no matter which of their two Social Security numbers the payer used.
Two situations do repay a moment’s thought. If you file separately, the number on the W-9 determines whose return the 1099 is matched against, and the allocation between you then has to be made deliberately rather than by accident. And in a community property state the ownership analysis may not follow the account title at all. Neither of those is decided by anything visible on the form, so if the amounts are large enough to matter, ask the person who prepares your return which SSN they would rather see on it.
Where the account is genuinely combined and you file jointly, the practical advice is dull: choose one of you, and use that same name and SSN on every W-9 for that account for as long as it exists. It keeps the payer’s records, the 1099s and your own filing consistent, and it means a name change or an SSA correction only ever has to be chased in one place.
The 1099 arrives with one name on it
This is where people write in. The account belongs to both of you and the Form 1099-INT shows one name and one Social Security number. Nothing has gone wrong. The IRS instructions for the requester tell payers exactly this: where payments went to more than one payee, or the account is in more than one name, only the name of the payee whose TIN appears on the Form W-9 goes on the first name line of the information return. Other individual payees may be shown in the area below it, and often are not.
Where the income really does belong to more than one person and they are not spouses filing together, the recipient of the 1099 becomes a nominee. The general instructions for information returns put the obligation on them rather than on the original payer: someone who receives a Form 1099 for amounts that actually belong to another person files the same type of Form 1099 for each of the other owners, showing the amount allocable to each, with themselves as payer and the true owner as recipient. A Form 1096 goes to the IRS with the paper copies and each owner gets their copy.
- Spouses are carved out of this. The instructions say a spouse is not required to file a nominee return to show amounts owned by the other spouse.
- The nominee, and not the payer who issued the original 1099, is responsible for the follow-on returns. Asking the bank to reissue in two names generally goes nowhere.
- Nominee reporting is a filing job with deadlines and its own penalties. For anything beyond trivial amounts of interest, this is a conversation with a preparer.
- A cleaner fix, where the payer will cooperate, is to stop the situation arising: separate accounts, or separate W-9s against a payment stream the payer is willing to split.
A joint account at a foreign financial institution is different
Row 3 of the table breaks the pattern deliberately. For two or more U.S. persons holding a joint account maintained by a foreign financial institution, you give the name and number of each holder of the account. Not one. Each. The account is being documented for FATCA purposes as well as for backup withholding, and the reporting there is per person, so every U.S. holder supplies their own certification.
The requester instructions add a rule for the mixed case, where some holders are foreign and some are not. If the first payee listed gives the institution a Form W-8 or a similar signed statement of foreign status, backup withholding applies to the account unless every joint payee establishes foreign status, or any one of the joint payees who has not established foreign status supplies a TIN. Where such a TIN is supplied, the institution uses that number for backup withholding and information reporting. There is a matching presumption rule: a withholding agent that cannot reliably associate a payment to joint payees with valid documentation from each of them, where all of them look like individuals, treats the payment as made to an unidentified U.S. person and withholds, unless one joint payee provides a Form W-9.
The practical effect of that last rule is worth knowing if you are the U.S. holder on a mixed joint account abroad: your Form W-9 can be what keeps 24% off the whole payment, because the payment is then treated as made to you. It also means the reporting follows you. Line 3b and foreign owners
Accounts that look joint and are not
Several account types read like joint accounts on a statement and sit somewhere else in the table.
Frequently asked questions
Do both account holders fill out a W-9?
For a single jointly held account, no. One form goes back, carrying one name on Line 1 and one taxpayer identification number in Part I. The requester reports the account under that number. Where a payer is splitting a payment stream between co-owners rather than maintaining one pooled account, it may ask each owner for a form and report each share separately.
Whose SSN goes in Part I on a joint account?
The actual owner of the account. If the funds are combined and no one owner can be identified, the first individual listed on the account. And if only one of you holds a Social Security number, the form says that person’s number must be furnished, which settles it.
What happens if we forget to circle a name?
The form fills the gap for you, and the default may not be the answer you wanted. Where more than one name is listed and none is circled, the number is treated as belonging to the first name listed. Circling takes two seconds and removes the ambiguity.
My spouse got the 1099 for our joint savings account. Do I have a problem?
Almost certainly not. Married couples filing a joint return put the whole amount on one return anyway, and the IRS instructions for information returns say outright that a spouse is not required to file a nominee return to show amounts owned by the other spouse.
Who signs the W-9 for a joint account?
Only the person whose TIN appears in Part I, and only where the payment type calls for a signature at all. The other holders sign nothing. A joint brokerage or savings account opened after 1983 does require that signature, so this is not an academic point for bank paperwork.
We hold a rental property together. Can the tenant report half to each of us?
That depends on how the payer handles it. Rent on jointly owned property is a payment stream rather than a pooled account, so a payer willing to split it can collect a W-9 from each owner and report each share. Many will not, and one owner then receives the whole 1099 and allocates it.
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