W-9 Tax Form: Who Needs One and How to Fill It Out

The W-9 tax form is the one-page IRS document you give to a business, bank, or client so they have your correct name and taxpayer identification number on file for reporting payments they make to you. You do not send it to the IRS. You hand it to whoever asked for it, and they keep it to prepare their own information returns, usually a 1099. The current version was revised in March 2024 and is free to download from IRS.gov.1Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification

When Someone Will Ask You for a W-9

The request almost always comes from a payer who needs to file an information return about money moving to you. The most common trigger is freelance or contract work: any business paying you $600 or more in a year for non-employee services has to report it on Form 1099-NEC, and they need your W-9 to do that.2Internal Revenue Service. Am I Required to File a Form 1099 or Other Information Return? Banks and brokerages ask when you open an account so they can report interest and dividends. Title companies collect one at a real estate closing. Lenders request one when they cancel $600 or more of your debt, which generally counts as taxable income and gets reported on Form 1099-C.3Internal Revenue Service. About Form 1099-C, Cancellation of Debt

Before you fill anything out, make sure the request is legitimate. Because the form carries your Social Security Number, it’s a common target for identity theft schemes.

Is a W-9 Even the Right Form for You?

Two quick checks decide this. First, are you an employee or a contractor? If a company puts you on payroll and withholds tax from each paycheck, you fill out a W-4, not a W-9. A W-9 is for people paid without withholding: independent contractors, freelancers, vendors, and anyone else receiving non-employee income. If you sign a W-9, no taxes come out of what you’re paid, and you’re responsible for income tax and self-employment tax yourself, typically through quarterly estimated payments. If you aren’t sure which category you fall into, ask before signing anything.

Second, are you a U.S. person for tax purposes? Form W-9 is only for U.S. citizens (including those living abroad), resident aliens, and domestic entities. Nonresident aliens and foreign entities use a form from the W-8 series instead, usually the W-8BEN for individuals or W-8BEN-E for entities.4Internal Revenue Service. Instructions for Form W-8BEN Residency here is a tax concept, not an immigration one. You’re a resident alien if you hold a green card or meet the substantial presence test, which requires at least 31 days in the U.S. this year and 183 weighted days over three years (all of this year’s days, one-third of last year’s, and one-sixth of the year before).5Internal Revenue Service. Substantial Presence Test Signing a W-9 when you’re not a U.S. person is a misrepresentation; skipping the W-8 when you are foreign exposes payments to a 30% default withholding rate.6Internal Revenue Service. Instructions for the Requester of Form W-9

How to Fill Out Form W-9, Line by Line

Download the current form from IRS.gov and complete it in a few minutes.7Internal Revenue Service. Form W-9 – Request for Taxpayer Identification Number and Certification

Line 1, Name. Your full legal name as it appears on your federal tax return. For a business entity, use the entity’s legal name. This name has to match the taxpayer ID number you enter below, or the IRS may tell the payer to start backup withholding.

Line 2, Business name. If you operate under a DBA or trade name that differs from Line 1, put it here. Otherwise leave it blank.

Line 3, Federal tax classification. Check one box: individual/sole proprietor, C corporation, S corporation, partnership, trust or estate, or LLC. If you’re an LLC, you also enter a letter code showing how the LLC is taxed.

Line 4, Exemptions. If you’re an individual freelancer or contractor, leave this blank. It applies to entities like corporations, tax-exempt organizations, and government agencies that qualify to skip backup withholding.

Lines 5 and 6, Address. Where the requester should mail your 1099. If your address has changed since you last gave this requester a W-9, write “NEW” at the top of the form.

Part I, Taxpayer Identification Number. Individuals enter their Social Security Number. If you’re not eligible for an SSN, you can use an ITIN or an ATIN. Business entities usually enter their EIN.7Internal Revenue Service. Form W-9 – Request for Taxpayer Identification Number and Certification Double-check the digits against your Social Security card or IRS EIN letter; a single wrong number can trigger backup withholding later.

Part II, Certification. Your signature certifies three things: the TIN you gave is correct, you’re not currently subject to backup withholding (or you are, and you’ve crossed out that item), and you’re a U.S. citizen or resident alien.7Internal Revenue Service. Form W-9 – Request for Taxpayer Identification Number and Certification The signature is made under penalty of perjury. Honest mistakes are not what the IRS is looking for here; deliberate falsification is.

How to Deliver the Form Safely

Give the completed W-9 to the requester, not the IRS. Because it contains your SSN or EIN, how you send it matters. Encrypted email, a secure upload portal, hand delivery, or tracked mail are all safer than an ordinary email attachment. Mishandled W-9 forms are a common source of identity theft.

Once the payer has the form, they use it to issue you a 1099 after the tax year ends, usually by late January. When it arrives, check the reported amount against your own records. If the numbers don’t match, ask the payer for a corrected 1099 before you file. The IRS matches 1099s to tax returns automatically, and mismatches generate notices.

What Happens If You Don’t Provide a W-9

If you refuse to give a requester your TIN, or the one you gave is wrong, the payer must withhold 24% of your payments and send that money to the IRS. This is called backup withholding.8Internal Revenue Service. Backup Withholding It kicks in when:

  • You didn’t provide a TIN at all.
  • The IRS told the payer the name and TIN on your W-9 don’t match its records.
  • The IRS told the payer you previously underreported interest or dividends. You get four notices from the IRS over at least 120 days before this happens.
  • You failed to certify that you’re exempt when required to do so.

The 24% isn’t a penalty tax. It’s a prepayment against your eventual tax bill, and you claim credit for it when you file your return.9Internal Revenue Service. Topic No. 307, Backup Withholding The real cost is cash flow: losing a quarter of every payment until the underlying issue is fixed. To stop it, submit a corrected W-9 if the problem was a wrong TIN, or resolve the underlying notice with the IRS if you were flagged for underreporting.

When to Send an Updated W-9

A W-9 has no set expiration, but several changes require you to send a fresh one to each requester who might still issue you a 1099:

Keeping the form current with everyone who pays you is the cheapest way to keep your 1099s accurate and your payments flowing without withholding surprises.