To fill out a W-9 for a nonprofit, enter the organization’s exact legal name on Line 1, check “Other” on Line 3a and write your specific exempt status (for example, “tax-exempt organization, 501(c)(3)”), enter exempt payee code 1 on Line 4, and put your EIN in the Employer Identification Number box in Part I. The code 1 entry is what stops the payer from withholding 24% of your payment as backup withholding.1Internal Revenue Service. Form W-9 (Rev. March 2024) Everything else on the form works the same as it does for any other entity.
What to Have Ready Before You Start
Three names need to match exactly: the legal name on your IRS determination letter, the name tied to your EIN (on your CP 575 or 147C letter), and the name on your bank account. The IRS cross-checks with exact-match logic, so “Inc.” versus “Incorporated” is enough to cause a mismatch and delay payment.
Have your nine-digit EIN in hand. That’s the only acceptable Taxpayer Identification Number for an incorporated tax-exempt organization.2Internal Revenue Service. Employer Identification Number If you can’t find it, check your most recent Form 990 or the original EIN confirmation letter, or call the IRS Business & Specialty Tax Line.
Know your exact exempt designation: 501(c)(3), 501(c)(4), 501(c)(6), or whichever subsection applies. If your organization operates under a DBA, have that name ready too.
Line-by-Line Walkthrough
Line 1: Legal Name
Enter the exact legal name from your articles of incorporation and IRS determination letter. Not your website name, not your letterhead, not an acronym, not a program name. The name here must match the EIN in Part I, or the form will be rejected.
Line 2: Business or DBA Name
Only fill this in if your organization operates under a trade name different from its legal name. If “Central Valley Community Development Corporation” is your legal name and everyone calls you “Valley CDC,” put the legal name on Line 1 and “Valley CDC” here. Otherwise, leave it blank.1Internal Revenue Service. Form W-9 (Rev. March 2024)
Line 3a: Federal Tax Classification
This is where nonprofits most often go wrong. None of the pre-printed boxes (Individual/sole proprietor, C corporation, S corporation, Partnership, Trust/estate, LLC) fits a tax-exempt organization, even if you’re incorporated as a nonprofit corporation under state law. Check the “Other” box and write in your specific exempt status, such as “tax-exempt organization, 501(c)(3)” or “501(c)(6) organization.”1Internal Revenue Service. Form W-9 (Rev. March 2024)
Line 3b: Flow-Through Entity with Foreign Owners
Added in the March 2024 revision, this line applies to partnerships, LLCs taxed as partnerships, trusts, and estates that hold ownership interests in other flow-through entities with foreign partners, owners, or beneficiaries. Most domestic nonprofits skip it.
Line 4: Exemption Codes
Line 4 has two fields. The first is the exempt payee code, and this is the field that matters. Enter 1. Code 1 identifies your organization as exempt under Section 501(a), which covers every 501(c) subcategory, and it tells the payer’s system not to apply backup withholding.1Internal Revenue Service. Form W-9 (Rev. March 2024) Federal regulations list Section 501(a) organizations among the exempt recipients not subject to backup withholding.3eCFR. 26 CFR 31.3406(g)-1 – Exception for Payments to Certain Payees Leaving this field blank is the most expensive nonprofit mistake on the W-9: without code 1, the payer’s accounting system may withhold 24% from every check.4Internal Revenue Service. Backup Withholding
The second field is the FATCA exemption code. It applies only to accounts maintained outside the United States by certain foreign financial institutions. If your nonprofit banks domestically, leave it blank. If it does apply, the code for a 501(a) organization is “A.”1Internal Revenue Service. Form W-9 (Rev. March 2024)
Lines 5 and 6: Address
Enter your organization’s mailing address: street with suite or room number on Line 5, city, state, and ZIP on Line 6. Use the address the IRS has on file for your EIN. Any 1099 the payer eventually sends will go here, so confirm someone actually receives mail at that address.
Part I: Taxpayer Identification Number
Enter your nine-digit EIN in the Employer Identification Number box on the right, formatted XX-XXXXXXX. Do not use the Social Security Number box on the left.5Internal Revenue Service. Understanding Your EIN The EIN has to match the legal name on Line 1. If you recently changed the organization’s name and haven’t updated it with the IRS, resolve that first.
Part II: Certification and Signature
By signing, an authorized representative certifies under penalties of perjury that the TIN is correct and the organization is not subject to backup withholding. Include the date. The signer should be an officer such as the executive director, treasurer, or board president, or another person the governing documents or a board resolution authorize to act for the organization.
Returning the Form
The completed W-9 goes back to the entity that requested it. It never goes to the IRS. You can return it as a physical document, a scanned PDF through a secure portal, or via any electronic system the requester provides. The IRS has allowed electronic submission of Form W-9 since 1998, as long as the system verifies the signer’s identity, uses the exact perjury statement from the paper form, and treats the electronic signature as the final entry.6Internal Revenue Service. Announcement 98-27
Do not send a completed W-9 by unencrypted email. It contains your EIN and organizational details. If the requester has no secure portal, ask for a mailing address or deliver it by hand. The payer must safeguard the form and keep it for at least four years.7Internal Revenue Service. Employment Tax Recordkeeping Keep your own copy so you can cross-check any 1099s that show up in January.
Why Payers Request a W-9 From a Tax-Exempt Organization
Being tax-exempt doesn’t excuse you from returning the form. Payers need a W-9 on file to document that they verified your exempt status. Without it, they can’t prove the payment went to a tax-exempt entity, and their own information-reporting compliance is at risk. The IRS expects payers to collect and retain W-9s even when no 1099 is ultimately filed.8Internal Revenue Service. Instructions for the Requester of Form W-9 Some payments to nonprofits, such as rent or legal fees, do still get reported on a 1099 because the exceptions are narrower there. Pure charitable donations, on the other hand, are not reportable, so a donor writing a mission-support check generally has no reason to ask for a W-9. Requests usually arrive when your nonprofit is being paid for something specific: consulting, event services, facility rental, or a grant tied to a concrete deliverable.
One Boundary Worth Noting
Filing a W-9 with code 1 keeps backup withholding off the payment, but it doesn’t mean every dollar is tax-free. If your nonprofit earns income from activities not substantially related to its exempt purpose, that revenue may count as unrelated business income. Gross unrelated business income of $1,000 or more in a year requires your organization to file Form 990-T and possibly owe tax.9Internal Revenue Service. Unrelated Business Income Tax Renting unused office space to a for-profit tenant, running an unrelated retail operation, or providing consulting outside your mission are common triggers. A 1099 arriving after you submitted the W-9 is a signal worth reviewing with your accountant.