Form W-9 does not expire. The IRS sets no calendar deadline and no annual renewal requirement, so a single completed and signed W-9 stays valid indefinitely as long as the information on it remains accurate. A new one is only needed when something on the existing form has changed, or when the IRS tells the payer that the taxpayer identification number does not match its records.
Why There Is No Expiration Date
A properly completed W-9 stays on file until the payer knows, or has reason to know, that the information is no longer correct.1Internal Revenue Service. Instructions for the Requester of Form W-9 (Rev. March 2024) That is the actual standard. It means the payer does not have to chase every contractor for a fresh form each January, and it means the payee does not have to resubmit on any schedule. A W-9 signed five years ago is still good if nothing on it has changed.
The flip side of that standard is that a payer cannot ignore obvious signs of a problem. A returned 1099, a contractor mentioning they incorporated, a payment address that no longer works — any of these counts as reason to know, and the payer should request a replacement.
Changes That Require a New W-9
The form’s own “Updating Your Information” section tells payees to furnish a new W-9 whenever a material fact on the existing one changes.2Internal Revenue Service. Form W-9 (Rev. March 2024) Three categories cover almost every real-world case.
Legal Name or Entity Type
A new W-9 is needed whenever the payee’s legal name or business name changes, because that name goes directly onto the 1099 the payer files with the IRS. Common triggers: a freelancer changes their legal name after marriage, or a sole proprietor forms an LLC or incorporates. The new entity usually comes with a new EIN, which makes the old form outdated on two counts at once.
A change in entity classification alone is also enough, even without a name change. A sole proprietor who elects S-corporation status, for example, may now qualify as an exempt payee and needs to report that on a replacement form.2Internal Revenue Service. Form W-9 (Rev. March 2024) The same logic applies in reverse when exempt-payee status is lost.
Taxpayer Identification Number
The TIN is the whole point of the form. Any change — a new Social Security Number, a new EIN after incorporating, an EIN issued to a newly formed single-member LLC — requires a fresh W-9. Do not wait for the payer to ask. Sending an updated form promptly is the only way to keep the 1099 accurate and avoid the IRS mismatch process described below.
Address
A new address does not, strictly speaking, invalidate the TIN certification on the old form. But the payer is responsible for mailing the 1099 to the right place, and most will ask for a replacement W-9 as soon as they learn a payee has moved. Providing one without being asked is the cleaner practice.
When the IRS Forces a Replacement
Even a W-9 that a payee considers current can be knocked out of validity by the IRS. Payers periodically receive a CP2100 or CP2100A notice listing payees whose name-and-TIN combinations do not match IRS records. That notice starts a formal correction process.
On the first CP2100 for a given payee, the payer must send a “First B Notice” along with a blank Form W-9. The payee has a window to respond with a corrected TIN. If no response comes in, the payer must begin backup withholding no later than 30 business days after receiving the CP2100.3Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
If the same payee appears on a second CP2100 within three years, the bar rises. The payer sends a “Second B Notice,” and this time a new W-9 alone is not sufficient. The payee must provide either a copy of their Social Security card or an IRS Letter 147C confirming the correct name and EIN.4Internal Revenue Service. Backup Withholding “B” Program Backup withholding continues until that documentation is delivered. Once a valid corrected TIN is on file, the payer must stop withholding within 30 calendar days.3Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
If you are the payee and you receive a B notice request from a payer, treat it as a required replacement W-9. Ignoring it means 24% of every future payment will be diverted to the IRS until you comply.
Refusing to Provide a Replacement
A payee who will not furnish an updated W-9 when one is properly requested faces a $50 penalty per failure, capped at $100,000 per calendar year.5GovInfo. 26 USC 6723 – Failure To Comply With Other Information Reporting Requirements More immediately, backup withholding of 24% kicks in on every reportable payment until a valid form is on file. In practice, the withholding is what gets attention.
How Long to Keep the Old One
Because there is no expiration date, discarding an older W-9 is a matter of records retention, not renewal. The IRS’s general guidance is to keep employment tax records for at least four years after the tax becomes due or is paid, whichever is later.6Internal Revenue Service. How Long Should I Keep Records? Applied to W-9s, that means holding the form for at least four years after the last tax year in which you relied on it to file an information return. A W-9 that supported a 1099-NEC filed for the 2025 tax year should stay in the file through at least 2029.
Keeping W-9s longer than the minimum is common and sensible, especially for recurring contractor relationships. The form itself remains valid; only the retention clock is finite. The risk of tossing one early is losing the ability to prove you collected a valid TIN if the IRS later questions the information returns for that period.
The Short Version for Payees and Payers
If you are a contractor or vendor who already sent a W-9, you do not need to send another one on any schedule. Send a new form when your name, business name, entity type, TIN, exempt-payee status, or (as a courtesy) your address changes, and send one immediately if a payer forwards you a B notice.
If you are the payer, treat the W-9 on file as good until you have reason to think otherwise. Refresh it when you learn of a change, when the IRS sends a CP2100 naming that payee, or when you are onboarding an existing contractor under a new entity. Annual re-collection is not required by the IRS, though some businesses do it as an internal control.