How to Fill Out Form W-9 for a 501(c)(3) Nonprofit

To fill out Form W-9 for a 501(c)(3) nonprofit, enter the organization’s legal name on Line 1, check the federal tax classification that matches your legal structure on Line 3 (usually C Corporation for an incorporated nonprofit), write exempt payee code 1 and FATCA code A on Line 4, enter your EIN in Part I, and have an authorized officer sign Part II. Return the completed form to the requester, not to the IRS. Line 4 is the line that actually protects your cash: it tells the payer not to withhold 24% of what they owe you.

Why a Payer Is Asking

Tax-exempt status doesn’t excuse your organization from paperwork when someone pays you. Any entity that pays your nonprofit for services, rent, or grants may need to file a Form 1099-NEC or 1099-MISC. For 2026, the filing threshold for most of these payments is $2,000, up from the longstanding $600 figure that applied through 2025.¹ The payer collects a W-9 to get your name, tax classification, and EIN before deciding what to file.

Payments to tax-exempt organizations are generally exempt from 1099 reporting.² But the payer can’t know that unless you say so on the form. Without a W-9, the payer may treat your nonprofit like any other vendor and withhold 24% of the payment as backup withholding, sending it to the IRS on your behalf.³ You’d get it back eventually, but only after filing and waiting for a refund. Five minutes on the form saves months of chasing your own money.

Line 1 and Line 2: Names

On Line 1, enter your organization’s legal name exactly as it appears on your IRS determination letter and your articles of incorporation or trust instrument. This name must match what the IRS has on file for your EIN. Even a small mismatch can trigger a TIN/name mismatch notice to the payer, which delays your payment.⁴

Line 2 is for a trade name or “doing business as” name. If your organization operates publicly under a different name than its legal name, enter the DBA here. Otherwise leave Line 2 blank.⁴

Line 3: Which Box to Check

Line 3a asks you to check the box that matches your organization’s legal structure. There’s no checkbox specifically for “501(c)(3),” so the right box depends on how you were formed, not on your exempt status. Exempt status gets communicated on Line 4.

Nonprofit Corporations

Most 501(c)(3) organizations are incorporated under state nonprofit corporation statutes. The W-9 instructions direct anyone classified as a corporation to check the “Corporation” box. On the current form, the available options are “C Corporation” and “S Corporation.” A nonprofit corporation is not an S corporation, so check C Corporation.⁴ This feels odd because your organization doesn’t pay corporate income tax, but the form is asking about legal structure, not tax liability. Line 4 takes care of the exempt piece.

Trusts, Associations, and LLCs

If your 501(c)(3) is organized as a charitable trust, check “Trust/estate” instead.⁴ Unincorporated associations should check “Other” and write a description such as “501(c)(3) unincorporated association” in the space provided.

If your nonprofit is a single-member LLC that’s disregarded for federal tax purposes, the rules shift. Enter the owner’s name on Line 1 and the LLC’s name on Line 2, check the box that matches the owner’s tax classification, and use the owner’s EIN in Part I.⁴ This is uncommon for charities but does come up when a parent nonprofit creates an LLC subsidiary.

Line 3b asks whether a partnership or trust has foreign partners, owners, or beneficiaries. Most domestic 501(c)(3) organizations can skip it.

Line 4: The Codes That Prevent Withholding

Line 4 is the most important line on the form for a nonprofit, and it’s where most mistakes happen. There is no “Exempt payee” checkbox anywhere on the W-9. Line 4 has two blank fields where you write in code numbers.⁴

In the Exempt payee code field, enter 1. This code covers organizations exempt from tax under section 501(a), which includes every 501(c)(3). It tells the payer your organization is not subject to backup withholding.⁴
In the FATCA reporting code field, enter A. This code applies to organizations exempt under section 501(a) and exempts your nonprofit from reporting under the Foreign Account Tax Compliance Act.⁴

If those fields are blank, the payer has no documentation that your organization is exempt. Many accounting departments run W-9s through automated systems, and a missing code is the fastest way to be flagged for backup withholding even though your nonprofit legally qualifies for the exemption.

Lines 5 and 6: Address

Enter the organization’s current mailing address. This is where the payer sends information returns and correspondence. Use the same address your organization has on file with the IRS.⁴

Part I: Your EIN

Enter your organization’s Employer Identification Number. A 501(c)(3) must always use its EIN here, never an individual’s Social Security Number or ITIN. The payment is going to the organization, not to a person, and the EIN is the identifier the IRS associates with the entity.⁴ If your organization is new and still waiting for an EIN, apply for one on the IRS website before completing the form. Submitting a W-9 with an individual’s SSN is a common error that can misattribute your income to a board member or executive director.

Part II: Signature

An authorized officer or representative signs and dates Part II. By signing, that person certifies under penalties of perjury that the EIN is correct and the organization qualifies as an exempt payee not subject to backup withholding.⁴

Electronic signatures are accepted. The IRS requires that any electronic system used to collect a W-9 require the payee’s electronic signature as the final step in the submission, and the perjury statement must contain the same language as the paper form.⁵ If a payer sends you a W-9 through a vendor portal, an electronic signature there satisfies the requirement as long as the portal includes the perjury language.

Where to Send It

Return the completed form directly to the entity that requested it. The W-9 itself is marked “Give form to the requester. Do not send to the IRS.”⁴ Common delivery methods include secure email, postal mail, or upload through the payer’s vendor portal. Because the form contains your EIN, avoid sending it as an unencrypted email attachment. Keep a copy for your own records; if a payer ever claims your nonprofit didn’t assert its exempt status, your copy is the proof.

When to Send an Updated Form

A W-9 has no fixed expiration date. It stays valid until the information on it changes.⁵ Submit a new one when:

Your legal name changes through a corporate name change, merger, or reorganization.
Your EIN changes, which is rare but can follow certain restructurings.
Your organization loses its tax-exempt status. If the IRS revokes your 501(c)(3) determination, you must tell any payer from whom you expect future payments that you’re no longer an exempt payee.⁴
Your address changes. Not as legally urgent, but an outdated address means information returns go somewhere else.

The instructions don’t specify a deadline for the updated form, but sending it promptly avoids backup withholding once the payer learns the old information is stale. Some payers also request a fresh W-9 every few years as internal policy.

What Happens If You Get It Wrong

Failing to furnish your TIN carries a penalty of $50 for each failure, up to $100,000 in a calendar year, unless the failure was due to reasonable cause rather than willful neglect.⁶ Claiming exempt payee status when your organization doesn’t qualify carries a $500 civil penalty.⁴ Willful false statements on a form signed under penalties of perjury can rise to a felony.⁷

For a legitimate 501(c)(3) completing the form in good faith, these penalties are unlikely. The realistic risk is more mundane: a sloppy W-9 with a mismatched name or a blank Line 4 leads to backup withholding that ties up your funds until you can claim a refund. Double-checking Line 1, Line 4, and Part I against your determination letter prevents that entirely.

1
Internal Revenue Service. Form 1099 NEC and Independent Contractors
2
Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025)
3
Internal Revenue Service. Topic No. 307, Backup Withholding
4
Internal Revenue Service. Form W-9 (Rev. March 2024)
5
Internal Revenue Service. Instructions for the Requester of Form W-9
6
Office of the Law Revision Counsel. 26 USC 6723 – Failure to Comply With Other Information Reporting Requirements
7
Office of the Law Revision Counsel. 26 USC 7206 – Fraud and False Statements