Complete Guide: What to Do When a Contractor Won't Provide Their W-9

Introduction: The W-9 Collection Challenge Every Business Faces

Every business that works with independent contractors eventually encounters this frustrating situation: a contractor won't provide their W-9. Whether the contractor is unresponsive, claims ignorance of the requirement, or outright refuses to provide their taxpayer identification number, this situation creates real compliance headaches. You need the information to file accurate 1099 forms, but the contractor is not cooperating.

This is not an uncommon problem. Surveys suggest that up to 15% of businesses struggle with at least one contractor who delays or refuses to provide W-9 information each year. The reasons vary: some contractors are trying to avoid tax reporting, others are simply disorganized, and some genuinely do not understand the requirement. Regardless of the reason, you still have legal obligations to meet.

The IRS requires businesses to collect taxpayer identification information from payees and report payments of $600 or more on Form 1099. When a contractor won't provide W-9 information, you face a compliance dilemma. You cannot simply ignore the requirement, but you also cannot force someone to provide their personal tax information.

Fortunately, the IRS anticipated this problem and established clear procedures for handling uncooperative contractors. This comprehensive guide explains exactly what to do when contractors refuse to provide W-9s, including your legal obligations, backup withholding requirements, documentation best practices, and strategies for encouraging compliance.

In this guide, you will learn:

  • Why contractors refuse to provide W-9s and how to address their concerns
  • Your legal obligations under IRS regulations when a contractor won't comply
  • Backup withholding requirements including rates, procedures, and reporting
  • How to file 1099s when you don't have complete information
  • Documentation requirements to protect yourself from IRS penalties
  • Practical strategies for obtaining W-9s from reluctant contractors
  • When to terminate the relationship with non-compliant contractors

Understanding Why Contractors Refuse to Provide W-9s

Common Reasons for W-9 Refusal

Before addressing what to do when a contractor won't provide W-9 information, it helps to understand why they might refuse. Different motivations require different approaches:

1. Tax Avoidance Concerns

Some contractors understand exactly what the W-9 is for and are hoping to avoid having their income reported to the IRS. They may operate in a cash economy, have unreported income from other sources, or simply want to minimize their tax burden. While understandable from their perspective, this motivation is illegal, and you cannot be complicit in tax evasion.

2. Privacy and Identity Theft Fears

Many contractors legitimately worry about sharing their Social Security Number (SSN). Identity theft is a real concern, and contractors may not trust how you will store and protect their sensitive information. This is a reasonable concern that deserves a thoughtful response.

3. Ignorance of the Requirement

Some contractors, especially those new to self-employment, genuinely do not understand that providing a W-9 is standard business practice and a legal requirement. They may think you are asking for something unusual or unnecessary.

4. Disorganization or Procrastination

The contractor may intend to provide the W-9 but keeps putting it off. They lose the form, forget to complete it, or prioritize other tasks. This is not really a refusal but rather a failure to prioritize the request.

5. Confusion About Entity Type

Contractors operating as sole proprietors sometimes think they do not need to provide a W-9 because they are not a "real business." Others may be confused about which TIN to use (SSN vs. EIN) or how to complete the form correctly.

6. Bad Past Experiences

A contractor who has had their SSN compromised in the past may be extremely reluctant to share it again, even for legitimate purposes. They may have experienced identity theft or fraud and are now overly cautious.

Strategies to Address Each Concern

Understanding the reason helps you craft an appropriate response:

Contractor Concern Your Response Strategy
Tax avoidance Explain legal requirements clearly; emphasize backup withholding consequence; consider terminating relationship
Privacy fears Explain your data security practices; suggest using EIN instead of SSN; offer secure submission methods
Ignorance Educate about IRS requirements; explain this is standard practice; provide form and clear instructions
Procrastination Set firm deadlines; tie to payment processing; send multiple reminders; make it easy to complete
Confusion Offer to walk through the form; provide instructions; answer questions; suggest they consult their accountant
Past bad experiences Emphasize security measures; offer secure portal submission; suggest EIN as alternative to SSN

Your Legal Obligations When a Contractor Won't Provide W-9

IRS Requirements for Information Reporting

The IRS requires businesses to report payments to independent contractors, vendors, and other non-employee payees using various 1099 forms. The most common is Form 1099-NEC for payments of $600 or more for services. To file these forms correctly, you need the payee's legal name and taxpayer identification number (TIN), which comes from the Form W-9.

When a contractor won't provide W-9 information, your legal obligations do not disappear. You must still:

  • Make reasonable efforts to obtain the contractor's TIN
  • Begin backup withholding if you cannot obtain a valid TIN
  • File the 1099 even without complete information (using available data)
  • Document your attempts to obtain the W-9

What Constitutes "Reasonable Efforts"

The IRS expects you to make reasonable efforts to collect W-9 information. While there is no specific definition, reasonable efforts generally include:

  • Initial request: Requesting the W-9 when you first engage the contractor
  • Written follow-ups: Sending at least two written requests (email or mail) if the initial request is ignored
  • Explaining consequences: Informing the contractor about backup withholding requirements
  • Providing the form: Making the W-9 form readily available (not just asking for information)
  • Setting deadlines: Establishing clear deadlines for W-9 submission

Document every attempt you make. If the IRS ever questions your compliance, you need proof that you tried to collect the information.

The Backup Withholding Requirement

When a contractor won't provide W-9 information (or provides invalid information), you are required by law to begin backup withholding. This is not optional. Backup withholding is essentially a prepayment of the contractor's taxes, withheld from their payments and remitted to the IRS on their behalf.

Current backup withholding rate: 24%

You must begin backup withholding when:

  • The contractor refuses to provide their TIN
  • The contractor fails to provide their TIN after you have made reasonable requests
  • The IRS notifies you that the TIN provided is incorrect (B Notice)
  • The IRS notifies you to begin backup withholding because the contractor underreported income

How Backup Withholding Works: A Complete Guide

Calculating Backup Withholding

When you must withhold from a contractor who won't provide their W-9, you withhold 24% of each reportable payment. Here is how it works:

Example Calculation:

You owe a contractor $5,000 for services rendered. They have not provided a W-9 despite your requests.

  • Gross payment: $5,000
  • Backup withholding (24%): $1,200
  • Net payment to contractor: $3,800

The $1,200 you withheld must be deposited with the IRS and reported on your quarterly employment tax return (Form 945 for non-payroll withholding).

What Payments Are Subject to Backup Withholding

Not all payments are subject to backup withholding. Payments that typically require backup withholding when the payee has not provided a valid TIN include:

  • Non-employee compensation (1099-NEC reportable)
  • Interest (1099-INT reportable)
  • Dividends (1099-DIV reportable)
  • Rents (1099-MISC reportable)
  • Royalties (1099-MISC reportable)
  • Other gains reported on various 1099 forms

Payments to corporations are generally exempt from backup withholding, which is why the W-9 tax classification is important. If you know the payee is a corporation, backup withholding typically does not apply.

Depositing and Reporting Backup Withholding

Backup withholding must be deposited with the IRS according to deposit schedules (similar to employment tax deposits) and reported annually on Form 945.

Key reporting requirements:

  • Form 945: Annual Return of Withheld Federal Income Tax (due January 31 following the tax year)
  • Form 1099: Report the gross amount paid AND the backup withholding amount in Box 4
  • Deposit schedules: Follow IRS deposit rules (semi-weekly or monthly depending on your liability)

Notifying the Contractor About Backup Withholding

You should notify the contractor that backup withholding will begin (or has begun) due to their failure to provide a W-9. While not strictly required by the IRS, notification serves several purposes:

  • Creates documentation of your compliance efforts
  • Gives the contractor one more chance to provide their W-9
  • Avoids surprise when they receive a reduced payment
  • Demonstrates good faith in trying to resolve the situation

Sample notification language:

"We have made multiple requests for your Form W-9, which you have not provided. Effective immediately, we are required by IRS regulations to withhold 24% of your payments as backup withholding. This withholding will be remitted to the IRS on your behalf and can be claimed as a credit on your tax return. To stop backup withholding, please provide a completed W-9 immediately."

Filing 1099s Without Complete Information

What to Do When You Must File

When the 1099 filing deadline arrives and a contractor won't provide W-9 information, you must still file. The IRS prefers to receive an incomplete 1099 rather than no 1099 at all. Here is how to handle different scenarios:

Scenario 1: You have the contractor's name but no TIN

File the 1099 with the name and leave the TIN field blank (or enter zeros). Report any backup withholding in Box 4. The IRS will accept the form, though it may trigger a penalty notice.

Scenario 2: You have a TIN but are unsure if it's correct

File the 1099 with the information you have. If the IRS determines the TIN is incorrect, you will receive a B Notice and may need to begin backup withholding going forward.

Scenario 3: You have no information at all

This is rare if you paid someone, as you should have at least their name and address from payment records. File with whatever information you have. Use "Unknown" sparingly, only when you truly cannot determine information.

Potential Penalties for Filing Without TIN

Filing a 1099 without a TIN or with an incorrect TIN can result in penalties. However, the IRS provides relief if you demonstrate reasonable cause:

Penalty Type Amount (2025) Notes
Missing TIN on 1099 $60 to $310 per form Depends on how late the correct information is provided
Incorrect TIN on 1099 $60 to $310 per form May be waived if reasonable cause exists
Intentional disregard $630 per form (no cap) Applies only if you deliberately ignore requirements
Failure to backup withhold Amount that should have been withheld You become liable for the unpaid tax

Establishing Reasonable Cause to Avoid Penalties

The IRS will waive penalties if you can demonstrate "reasonable cause" for filing incorrect or incomplete information returns. To establish reasonable cause when a contractor won't provide W-9 information, you must show:

  • Initial solicitation: You requested the TIN when the relationship began (or when the first payment was made)
  • Follow-up attempts: You made at least one follow-up request (annual solicitation is required if TIN is still missing)
  • Backup withholding: You began backup withholding when required
  • Documentation: You kept records of all solicitation attempts

Keep copies of all W-9 requests, including emails, letters, and any responses from the contractor. This documentation is essential if the IRS questions your filing.

Step-by-Step Process for Handling Non-Compliant Contractors

Step 1: Make the Initial W-9 Request

Before making any payment, request the contractor's completed W-9. Provide the form, clear instructions, and a deadline. Explain that the W-9 is required by law for tax reporting purposes.

Best practices for initial request:

  • Include the fillable W-9 form with your request
  • Explain why you need the information (IRS reporting requirement)
  • Set a specific deadline (before first payment is preferred)
  • Offer multiple submission options (email, mail, fax, secure portal)
  • Provide contact information for questions

Step 2: Send Follow-Up Requests

If the contractor does not respond to your initial request, send follow-up requests. The IRS expects at least two solicitation attempts. Space your requests reasonably (not three emails in one day).

Sample follow-up schedule:

  • Day 1: Initial request with contract/onboarding
  • Day 14: First follow-up reminder
  • Day 21: Second follow-up with backup withholding warning
  • Day 30: Final notice before implementing backup withholding

Step 3: Explain Consequences Clearly

In your follow-up communications, clearly explain what will happen if the contractor continues to refuse:

  • You will begin withholding 24% of their payments
  • Their income will still be reported to the IRS (with or without their TIN)
  • They may face their own tax issues if income is not properly reported
  • You may need to terminate the working relationship

Step 4: Implement Backup Withholding

If the contractor still won't provide their W-9 after reasonable solicitation efforts, begin backup withholding from subsequent payments. Notify the contractor that withholding has begun and provide instructions for stopping it (by providing a valid W-9).

Step 5: Document Everything

Maintain a complete file documenting your W-9 solicitation efforts:

  • Copies of all W-9 requests (emails, letters)
  • Dates of each request
  • Any responses from the contractor
  • Notes from phone conversations
  • Backup withholding notification sent to contractor
  • Records of backup withholding amounts

Step 6: File the 1099 at Year-End

When the 1099 filing deadline arrives, file the 1099 with whatever information you have. Report the gross amount paid, any backup withholding in Box 4, and use the contractor's name and address. If you do not have a TIN, leave the field blank.

Step 7: Continue Annual Solicitation

If you continue to work with the contractor in subsequent years and still do not have their TIN, you must make at least one annual solicitation attempt. This keeps your reasonable cause protection in place.

Special Scenarios and Edge Cases

The Contractor Claims to Be a Corporation

Some contractors may claim they are a corporation to avoid 1099 reporting (corporations are generally exempt from 1099-NEC and 1099-MISC). However, you should still request a W-9 to verify their claim. The W-9 includes a certification of tax classification.

If they refuse to provide a W-9 but claim to be a corporation:

  • Ask for other documentation (articles of incorporation, business license)
  • Check state business registries to verify corporate status
  • If you cannot verify, treat them as non-corporate and withhold

The Contractor Is a Foreign Person

Form W-9 is only for U.S. persons. Foreign persons (including foreign businesses) should complete Form W-8 instead. If a contractor claims to be foreign, request the appropriate W-8 form. Different withholding rules apply to foreign persons (typically 30% withholding on certain payments).

The Contractor Gives You a TIN That Later Proves Invalid

You may receive a B Notice from the IRS indicating that a TIN/name combination does not match their records. When this happens:

  1. Send the contractor a copy of the B Notice (or a notice explaining the issue)
  2. Request a corrected W-9 within 30 days
  3. If they do not respond or provide the same TIN, begin backup withholding
  4. Keep copies of all notices and your response

The Contractor Only Works One Time

Even for one-time contractors, if you pay them $600 or more, you need their W-9. If they disappear without providing one, document your solicitation attempts and file the 1099 with available information. For future one-time engagements, establish a policy of collecting W-9s before work begins.

Multiple Contractors at One Company Refuse

If you have multiple contractors at a single company who all refuse to provide W-9s, this may indicate an intentional policy to avoid tax reporting. Consider whether you want to continue the business relationship. Apply backup withholding consistently to all contractors who have not provided valid W-9s.

Deciding Whether to Continue the Relationship

When to Terminate a Contractor Relationship

While you can work with contractors who won't provide W-9s (using backup withholding), sometimes the best decision is to end the relationship. Consider termination when:

  • The contractor is clearly trying to evade taxes: You do not want to be associated with illegal activity
  • The administrative burden is too high: Managing backup withholding, deposits, and reporting adds significant work
  • The contractor becomes adversarial: If they react with hostility to reasonable compliance requests, this signals other potential problems
  • Replacement is easy: If you can find an equally qualified contractor who will comply, why tolerate non-compliance?
  • The relationship is new: It is easier to end a new relationship than one with significant history

When to Continue Despite Non-Compliance

Sometimes you may choose to continue working with a non-compliant contractor:

  • The contractor has unique skills: They are difficult or impossible to replace
  • The privacy concern is genuine: They have legitimate fears you can address over time
  • The payments are small: The backup withholding amount is manageable
  • The relationship is long-standing: They may come around with continued education

If you continue the relationship, be meticulous about backup withholding and documentation. Do not let sympathy for the contractor's concerns lead you to skip required compliance steps.

Frequently Asked Questions About Contractors Who Won't Provide W-9s

Can I legally require a contractor to provide a W-9?

You cannot force someone to provide their personal tax information. However, you can refuse to work with contractors who won't comply, and you can (and must) implement backup withholding on payments to contractors who don't provide a valid TIN. Most contractors will provide their W-9 when they understand the alternative is having 24% of their payments withheld.

What if the contractor says they are exempt from W-9 requirements?

Very few payees are truly exempt from providing a W-9. Corporations may be exempt from 1099 reporting in many cases, but they should still provide a W-9 to certify their tax classification. If someone claims exemption, ask them to provide a W-9 with the appropriate exemption codes in Line 4. If they refuse any documentation, proceed with backup withholding.

How long should I wait before starting backup withholding?

The IRS does not specify an exact timeline, but you should begin backup withholding after making reasonable solicitation efforts. A typical timeline might be 30 days from your first request, or after two follow-up requests go unanswered. For new contractors, consider requiring the W-9 before making any payment to avoid this issue entirely.

Does the contractor get credit for backup withholding on their tax return?

Yes. Backup withholding is essentially a prepayment of the contractor's income tax. When you report the withholding on their 1099 (Box 4) and remit it to the IRS, the contractor can claim a credit for this withholding on their tax return. This often motivates contractors to provide their W-9, as they realize the money is not lost, just withheld.

Can I pay a contractor in cash to avoid W-9 issues?

Absolutely not. The payment method does not change your reporting requirements. Whether you pay by check, direct deposit, cash, or cryptocurrency, if you pay a non-employee $600 or more for services, you must report it on Form 1099-NEC and must collect a W-9 (or withhold). Paying in cash to avoid reporting is illegal and could result in severe penalties.

What if the contractor provides an obviously fake TIN?

If you suspect a TIN is fake (obviously wrong format, all zeros, or 123-45-6789), do not accept it. Treat this the same as a refusal to provide a TIN and begin backup withholding. You can use TIN matching services to verify TINs before filing, which helps catch errors and potential fraud early.

Do I still file a 1099 if I've been backup withholding?

Yes. You must file the 1099 regardless of whether you have been backup withholding. Report the gross amount paid to the contractor and the backup withholding amount in Box 4. The contractor needs this information to claim credit for the withholding on their return.

Can I recover backup withholding if the contractor later provides a W-9?

No, you cannot get a refund of backup withholding already remitted to the IRS. However, once the contractor provides a valid W-9, you stop withholding on future payments. The contractor claims credit for all backup withholding on their tax return. This is another reason to collect W-9s before making payments.

What penalties do I face if I don't backup withhold when required?

If you are required to backup withhold and fail to do so, you become personally liable for the amount that should have been withheld. For example, if you should have withheld $1,200 but did not, you owe the IRS that $1,200 plus potential interest and penalties. This is why proper documentation of your W-9 solicitation efforts is so important.

Can I use the contractor's information from a previous year?

If you have a W-9 from a contractor from a previous year, you can continue to use that information unless you know it has changed (they notify you of a name or address change, for example). W-9s do not expire. However, if the IRS notifies you of a problem with the TIN, you must solicit a new W-9.

How BoomTax Simplifies 1099 Filing for Non-Compliant Contractors

Comprehensive Filing Solutions

BoomTax helps businesses handle even the most challenging 1099 filing situations, including cases where a contractor won't provide W-9 information:

  • File with incomplete information: BoomTax allows you to file 1099s even when some information is missing, ensuring you meet your filing obligations
  • Backup withholding reporting: Easily report backup withholding amounts in Box 4 of your 1099s
  • TIN verification: Catch potential TIN problems before filing using integrated verification services
  • Documentation support: Maintain records of your filings and any issues encountered

TIN Matching and Verification

BoomTax integrates with TIN verification services to help you identify problem TINs before filing:

  • Pre-file TIN matching: Verify contractor TINs match IRS records before submitting 1099s
  • Batch verification: Check your entire contractor database efficiently
  • Error identification: Know which contractors need W-9 corrections before year-end

Easy Corrections

If you file a 1099 with missing or incorrect information and later obtain the correct data, BoomTax makes corrections simple:

  • Unlimited corrections: File corrected 1099s at no additional per-form charge
  • Simple correction process: Pull up the original filing and update the information
  • Automatic transmittal: BoomTax handles IRS correction submission

Bulk Filing Capabilities

For businesses with many contractors, including some who are non-compliant:

  • Import from accounting software: Bring in contractor data from QuickBooks and other systems
  • Bulk validation: Identify all problem records before filing
  • One-click e-filing: Submit all 1099s to the IRS without separate logins
  • Recipient delivery: Mail or electronically deliver 1099s to contractors

Start Filing with Confidence

Don't let non-compliant contractors derail your tax reporting. BoomTax provides the tools you need to file accurately and on time, even in difficult situations. Set up your account today and see how easy 1099 filing can be, regardless of contractor cooperation.

Conclusion: Managing Non-Compliant Contractors

When a contractor won't provide W-9 information, you have clear options and obligations. The IRS anticipated this situation and established backup withholding as the solution. While frustrating, this is not an insurmountable compliance problem.

Key takeaways:

  • Understand the reasons: Contractors refuse W-9s for various reasons; understanding their concerns helps you respond appropriately
  • Make reasonable efforts: Request the W-9 multiple times and document your attempts
  • Explain consequences clearly: Contractors who understand backup withholding usually comply
  • Implement backup withholding: When contractors still refuse, you must withhold 24% of their payments
  • File anyway: File the 1099 with available information; an incomplete 1099 is better than none
  • Document everything: Maintain records of your solicitation efforts to establish reasonable cause
  • Consider termination: Sometimes ending the relationship is the best option

The best approach is prevention: establish policies that require W-9s before work begins or payments are processed. For more information on proactive W-9 collection, see our guide on how to collect W-9s from contractors.

For more information on 1099 compliance, explore our guides on 1099 reporting requirements, avoiding 1099 penalties, TIN mismatch penalties, and 2026 filing deadlines.

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