Contractor compliance (W-8BEN)

Important disclaimer: This article is for general informational purposes only. It does not constitute tax, legal, or accounting advice. International contractor tax compliance is highly fact-specific and the rules change frequently. Consult a qualified tax professional before making decisions about withholding, treaty claims, or information reporting for your specific contractor relationships. Examples in this guide, such as the 30% default withholding rate, the 24% backup withholding rate or March 15 filing dates, are illustrative and must be verified against the latest IRS publications before you apply them.

When you hire a contractor, the tax paperwork feels like a footnote. You agree on scope, you agree on a rate, and then someone asks whether you have a W-9 or a “W-8 form” on file. Most businesses either file the form away without checking it or skip it entirely. Both approaches create real financial exposure.

The two forms answer one question: is the person you pay a US person or not? A US contractor gives you Form W-9, and what you pay them goes on a 1099-NEC. A non-US individual gives you Form W-8BEN, the document that determines whether you owe the US Treasury 30% of every dollar you pay them. Getting the right form protects you. Getting it wrong means you become the involuntary tax collector, with penalties added on top.

This is a deep guide to both forms, one piece of the broader contractor compliance guide: which form to collect and who collects it, how W-8BEN withholding works, how to collect and check each form, when they expire, and what you file at year-end. It also covers where businesses consistently go wrong, and what changes when you pay contractors through a Contractor of Record.

W-9 vs. W-8BEN vs. W-8BEN-E: Choosing the right form

The key question is: is the payee a US person or a foreign person, and are they an individual or an entity?

Scenario	Correct form	What you file at year-end
US citizen, resident alien, or US entity	W-9	Form 1099-NEC, if payments reach the reporting threshold
Non-US individual (foreign individual contractor)	W-8BEN	Form 1042-S for amounts subject to US withholding
Non-US entity (foreign company, partnership, etc.)	W-8BEN-E	Form 1042-S for amounts subject to US withholding

W-9 applies when the contractor is a US person. Your payments go on Form 1099-NEC, not 1042-S. The Chapter 3 withholding regime does not apply.

W-8BEN applies to non-US individuals who are beneficial owners of the income. It allows them to certify foreign status and claim treaty benefits where applicable.

W-8BEN-E applies when your contractor invoices through a foreign company rather than as an individual, for example a limited company in Canada or a GmbH in Germany. It has more complex classification questions related to entity type and FATCA status. An individual operating under a business name still uses W-8BEN if the income flows to them personally; but a contractor who invoices through a registered foreign entity must provide W-8BEN-E.

“US person” under US tax law means US citizens, US resident aliens (including green card holders), and entities organized under US law. Location is not the test. A US citizen living and working in Berlin is still a US person and should provide a W-9. A Canadian citizen working entirely in Canada is a foreign person and should provide W-8BEN.

The gray area arises when a foreign national spends significant time in the United States. The IRS’s substantial presence test determines whether a foreign national has become a US resident alien for tax purposes. An individual present in the US for at least 31 days during the current year and at least 183 days during a three-year lookback period (using a weighted formula) generally meets this test and should provide W-9. This determination is fact-specific and changes year to year as travel patterns change.

Who fills in the form and who keeps it

Both forms work the same way: the contractor fills in and signs the form, and you, the payer, request it before the first payment and keep it. Neither form goes to the IRS. You rely on it to decide withholding and reporting, and you produce it if the IRS asks during an audit.

When in doubt about a contractor’s status, ask directly. Their self-certification on the appropriate form provides your documented basis for withholding treatment. If a contractor provides the wrong form, that is their responsibility provided you did not have actual knowledge or reason to know the certification was incorrect. Still, settle any doubt before the first payment: a foreign contractor who sends a W-9 instead of a W-8BEN creates a withholding problem if the payments later turn out to need the 30% rate.

What Form W-8BEN is

Form W-8BEN is the Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals). It is an IRS form completed by non-US individual contractors and provided to the US business paying them.

The form does several things at once. It certifies that the contractor is not a US person. It states the contractor’s country of residence. It provides a taxpayer identification number (TIN) where applicable. And if a tax treaty between the US and the contractor’s country of residence reduces the withholding rate, the contractor claims that benefit on the form.

The concept of “beneficial owner” is central here. The beneficial owner is the real person who owns or is entitled to the income, not an agent, nominee, or intermediary. As a withholding agent, you must identify the true beneficial owner for proper compliance.

Form W-8BEN covers individuals only. Non-US companies, partnerships, and other entities use Form W-8BEN-E instead, which is longer and includes additional certifications required under the Foreign Account Tax Compliance Act (FATCA). If you are engaging a foreign business entity, W-8BEN-E is the correct form. Mixing up the two is a common and costly mistake. This article focuses on W-8BEN for individuals, though much of the underlying compliance logic applies to both.

US businesses and any business treated as a US payer under IRS rules are required to collect Form W-8BEN before making payments to non-US individual contractors. The obligation sits with you, the payer.

When and why withholding applies

US tax law establishes a default rule: payments of US-source income to foreign persons are subject to a 30% withholding rate. This regime operates under Chapter 3 of the Internal Revenue Code, specifically IRC Sections 1441 through 1443. The IRS refers to it as NRA (nonresident alien) withholding. As a withholding agent, you are responsible for deducting the tax from gross payments and remitting it to the Treasury.

The income subject to this default rate is FDAP income: Fixed, Determinable, Annual, or Periodical income from US sources. This includes royalties, interest, dividends, rents, and certain service fees. The 30% rate applies to gross amounts, before any deductions.

The service location question is important and often misunderstood. Under IRC Sections 861(a)(3) and 862(a)(3), compensation for personal services is sourced to the place where the services are physically performed, not where the payer is located. Services performed entirely outside the United States by a foreign contractor are generally foreign-source income, which falls outside the scope of Chapter 3 withholding. However, this determination is nuanced. If a contractor performs any portion of the work physically in the United States, that portion may become US-source income subject to withholding analysis. This area requires professional analysis for any significant engagement.

The safe approach is consistent regardless of where you think services are performed:

1. Collect a W-8BEN before any payment.
2. Determine withholding obligation based on treaty status, income type, and service location.
3. Apply withholding if required.

Without a valid form on file, the IRS presumes the contractor is either a US person subject to backup withholding or a foreign person subject to the full 30% rate. Either way, the liability for unpaid withholding stays with you.

Professional guidance is strongly recommended before making withholding determinations on significant contractor payments.

Tax treaty rates: How W-8BEN reduces withholding

The United States has income tax treaties with roughly 70 countries. These treaties can reduce or eliminate withholding on certain types of income paid to residents of treaty countries. When a contractor from a treaty country completes Part II of the W-8BEN, they are claiming those reduced rates.

The treaty claim requires specificity. The contractor must identify the country of residence, cite the specific treaty article and paragraph they are relying on, state the reduced withholding rate claimed, and describe the type of income the claim covers. A form that simply names a country without citing a treaty article does not constitute a valid treaty claim. The full 30% rate applies by default.

Two scenarios illustrate how this works:

• A freelance developer resident in the United Kingdom, performing all work from London, may cite the US-UK treaty’s relevant article for independent personal services. If they have no permanent establishment in the US, they may claim a 0% rate. On their W-8BEN, they would fill Part II with the treaty country, specify the article and paragraph, and claim the applicable reduced rate.
• A contractor resident in a country with no US tax treaty cannot use the form to reduce withholding. The W-8BEN will still document their foreign status, but the default 30% rate on US-source income applies regardless.

One important technical distinction: For personal services income specifically, the IRS specifies that foreign independent contractors should use Form 8233 (Exemption from Withholding on Compensation for Independent Personal Services of a Nonresident Alien Individual), not the W-8BEN, to claim a treaty exemption on that income. Form W-8BEN is used for passive income types such as royalties, interest, and dividends. For most practical business situations involving international contractors, this distinction matters significantly. A qualified tax professional should review treaty claims involving personal services compensation before you rely on them to reduce withholding.

To verify whether a specific treaty reduces the rate for the income type you are paying, consult IRS Publication 515 and the IRS Tax Treaty Tables (verify current editions). Treaty status changes: as of January 1, 2024, the US-Hungary income tax treaty ceased to have effect, meaning the full 30% statutory rate applies on US-source payments to Hungarian recipients regardless of prior treaty claims. Treaty suspensions and renegotiations occur with some regularity, so always verify current treaty status before applying any reduced rate.

The W-8BEN collection process

Collect the form before the first payment. This is not optional. Paying before receiving a valid W-8BEN creates retroactive withholding liability that cannot be undone by collecting the form later.

Build the W-8BEN collection into your contractor onboarding workflow. Make it a condition of the first payment, the same way you collect a signed contract before work begins. Send the contractor a copy of the blank form, a link to the IRS Form W-8BEN page, and clear instructions explaining why the form is needed.

When you receive a completed W-8BEN, validate it before filing it away.

Part I check:

• Full legal name matches the payment recipient exactly
• Country of citizenship is specified and is not the United States
• Permanent residence address is a complete physical address in a foreign country (not a PO box, care-of address, or US address; a US address is a red flag that the contractor may have established US tax residency, which would require a W-9 instead)
• Country of residence for tax purposes is stated
• Foreign TIN is included where required by IRS instructions

Part II (treaty claim) if applicable, check:

• Treaty country matches the country of residence declared in Part I
• Specific treaty article and paragraph are filled in
• Reduced withholding rate claimed is consistent with the actual treaty terms (verify against current IRS treaty tables)
• Type of income is specified (independent personal services, royalties, etc.)

Part III check:

• Form is signed and dated. An unsigned or undated form is invalid.

Electronic collection is permitted, provided the system authenticates the signer’s identity, makes clear what they are certifying, creates a tamper-proof record, and allows the signer to obtain a hard copy on request.

As a withholding agent, you may rely in good faith on a valid W-8BEN unless you have reason to know the information is incorrect. If a form contains clear inconsistencies, for example a treaty country in Part II that does not match the country of citizenship in Part I, do not rely on it and request a corrected form.

W-8BEN validity, expiry, and renewal

A completed Form W-8BEN is generally valid from the date of signature until the last day of the third succeeding calendar year. A form signed on any date in 2026, whether January 1 or December 30, expires on December 31, 2029. The expiration is always the last day of the calendar year, three years out, regardless of the specific month or day the form was signed (verify current IRS guidance).

The form also expires immediately upon a change in circumstances that makes any information on the form incorrect. Common triggering events include:

• A change in the contractor’s country of residence
• A move to the United States, or the contractor becoming a US citizen or resident alien (including meeting the substantial presence test)
• Changing the type of income being received
• Any detail used in a treaty claim becoming incorrect

When a change in circumstances occurs, the contractor is required to notify you within 30 days and provide an updated form. You cannot continue to rely on the original form once you have reason to know the information is outdated.

Managing renewals in practice:

• Record the date signed and calculate the expiry date immediately
• Set reminders 60 to 90 days before expiry to request renewal
• Suspend reduced withholding rates if a replacement is not received in time
• Without a valid W-8BEN, apply the full 30% withholding rate until a new form arrives

What happens if the form expires and you have not collected a replacement? The IRS presumption rules apply: the full 30% withholding rate applies to any US-source payments until a valid replacement form is received. Payments made during the gap can create withholding liability that is difficult to resolve after the fact.

Retain every W-8BEN for at least three years after the last payment to which the form applied, not three years after the form was signed. A form collected in 2024 for a contractor you pay through 2028 should be retained until at least 2031. Extended retention is advisable for significant contractor relationships given the IRS’s audit windows (verify current IRS retention guidance).

Filing obligations: Forms 1042 and 1042-S

Collecting the W-8BEN establishes the basis for your withholding determination. Separately, you also have information reporting obligations that run on an annual cycle.

Form 1042-S (Foreign Person’s US Source Income Subject to Withholding) must be filed with the IRS for each foreign contractor to whom you paid amounts subject to withholding under Chapter 3 during the year. It reports the income type, the gross amount paid, the withholding applied (which may be zero if a treaty or services location exemption applies), and the contractor’s identifying information drawn from the W-8BEN. There is no minimum payment threshold for 1042-S reporting. Copies are also due to each contractor. The deadline for both is March 15 of the year following the payment year (verify current deadline via IRS 1042-S instructions).

Form 1042 (Annual Withholding Tax Return for US Source Income of Foreign Persons) is the annual summary return that aggregates all 1042-S filings. It is also due March 15 (verify current deadline).

One important nuance: even when no withholding applies because of a treaty exemption or because services were performed entirely outside the United States, Form 1042-S may still be required for certain types of income. The reporting and withholding obligations are legally separate: satisfying one does not automatically satisfy the other. Verify the specific reporting requirement with qualified tax counsel.

If you file 10 or more information returns of any type, electronic filing is required (verify current IRS threshold).

Do not wait until tax season to reconcile W-8BEN data. Regular quarterly reviews of contractor payments and associated forms make 1042 and 1042-S filing less stressful and more accurate.

Form W-9 for US contractors

Form W-9, formally “Request for Taxpayer Identification Number and Certification,” is the form US contractors give you. It collects their full legal name, their business name if different, their federal tax classification, their address, and their Taxpayer Identification Number (TIN): a Social Security Number for individuals, or an Employer Identification Number for business entities. The contractor certifies under penalty of perjury that the information is accurate, and the form feeds the 1099-NEC you may need to file at year-end.

The IRS released a revised W-9 in March 2024. It added Line 3b, where partnerships, trusts, and estates disclose whether they have foreign partners or owners, and clarified how disregarded entities complete Line 3a. Use the current version from IRS.gov.

When to collect the W-9

Before the first payment, every time. The 1099-NEC reporting threshold was $600 per calendar year; the One Big Beautiful Bill Act raised it to $2,000 for payments made after December 31, 2025, indexed for inflation starting in 2027 (verify the current threshold with a tax professional). The threshold decides when you file a 1099-NEC. It does not change when you collect the W-9.

The IRS sets no hard deadline for collecting a W-9, but timing still matters. If a contractor never provides a valid TIN and you have already paid them, you cannot apply backup withholding to those payments after the fact, and you become liable to the IRS for the uncollected tax, currently 24% of the gross payment (verify the current rate). Contractors are also harder to reach once the project ends and the invoice is paid. Collect the form at onboarding, when the conversation is easy.

What to check on a received W-9

Name and TIN. The legal name on the W-9 must match the TIN. A mismatch surfaces at 1099 filing, and the IRS may send a CP2100 notice that triggers backup withholding obligations. The IRS TIN Matching Program is a free service that checks name and TIN combinations against IRS records before you file: up to 25 at a time online for immediate results, or a bulk file for larger contractor pools. A mismatch caught there costs you nothing.

Federal tax classification. Line 3a shows the contractor’s entity type, which decides whether you file a 1099-NEC:

Entity type	TIN used	1099-NEC required?	Notes
Individual or sole proprietor	SSN or EIN	Yes, if payments reach the threshold	Most common contractor type
Single-member LLC (disregarded)	Owner’s SSN or EIN	Yes, if payments reach the threshold	Owner’s name on Line 1; LLC name on Line 2
Partnership or multi-member LLC	EIN	Yes, if payments reach the threshold	Use the partnership’s EIN
C corporation	EIN	Generally no	Exception: payments for legal services remain reportable
S corporation	EIN	Generally no	Same legal services exception applies

Payments to attorneys for legal services are reportable on a 1099-NEC even when the attorney operates as a corporation. Verify current exceptions with a tax professional before assuming the corporate exemption applies.

Signature. An unsigned W-9 is not valid. The contractor must sign and date it under the perjury certification. A missing signature is a reason to send the form back before any payment goes out.

When a contractor doesn’t provide a W-9

A contractor who refuses to provide a W-9, or doesn’t respond to your request, triggers backup withholding. You withhold 24% (verify the current rate) from each payment, deposit it with the IRS through the Electronic Federal Tax Payment System (EFTPS), and report it at year-end on Form 945, Annual Return of Withheld Federal Income Tax. You still file the 1099-NEC for applicable payments, leaving the TIN field blank if none was provided. The contractor receives 24% less than expected, and you carry a deposit and reporting process on top of your normal work.

A W-9 on file doesn’t settle everything if the TIN is wrong. When the IRS finds a mismatch after you file, it sends a CP2100 or CP2100A notice, known as the B-notice. You have 15 business days from receipt to send the contractor a first B-notice along with a new W-9. If the contractor does not respond within 30 business days, you must begin backup withholding on future payments. TIN Matching before you file is the most effective way to keep these notices from reaching you at all.

Keeping and refreshing W-9s

Keep W-9s for four years after the last date the information was used for tax purposes, per IRS recordkeeping guidance (verify current requirements). For an ongoing contractor, that clock restarts each year the W-9 informs a 1099 filing. Paper or electronic storage is your choice, as long as you can produce the record. A W-9 contains a TIN, so restrict who can open it.

Collect a new W-9 whenever a contractor’s name, address, TIN, or business structure changes, such as a sole proprietor converting to a corporation.

The IRS has permitted electronic W-9 collection since 1998. The system must authenticate the contractor’s identity, capture an electronic signature as the final entry under a perjury certification that uses the exact language of the paper form, and let you produce a hard copy for the IRS on request. A scanned PDF emailed back by the contractor does not automatically meet these requirements.

Common W-9 and W-8BEN mistakes businesses make

Paying before the form arrives. This is the most consequential error. Once a foreign contractor is paid without a valid W-8BEN on file, the IRS presumption rules apply retroactively, and collecting the form after payment does not eliminate the withholding liability on payments already made. For a US contractor, you cannot backup withhold on payments already made, so if no valid TIN arrives, the 24% becomes your liability. Establish a hard rule: no payment to any contractor without the right form on file first.

Requesting W-9s in January. Contractors are slow to respond once the work is done and paid, and you risk missing 1099-NEC deadlines. Build the request into onboarding.

Skipping the name and TIN check. A mismatch found after filing brings a B-notice and possible penalties for incorrect TINs. Run IRS TIN Matching before you file.

Not updating the W-9 when a contractor restructures. A sole proprietor who incorporates changes the TIN and the 1099 treatment, and the record on file no longer matches the IRS. Ask contractors to tell you about changes, and request a fresh form when they do.

Accepting an expired W-8BEN. A form is only as good as its current validity. If the form expired because three calendar years have passed, or because the contractor’s circumstances changed, it cannot be relied on. Treating an expired form as valid exposes you to the same liability as having no form at all. Validate the signature date when you receive a form and calculate the expiration date immediately.

Not tracking expiry dates across your contractor base. A single contractor’s W-8BEN expiry is manageable. Fifty contractors with overlapping signature dates is an operational problem. Without a systematic process for tracking expiration dates and requesting renewals, forms will lapse. The cost is 30% withholding on every payment made during the gap, plus penalties if 1042-S filing is missed.

Relying on incorrect treaty claims without verification. The contractor certifies that they qualify for a treaty benefit. You have a responsibility to verify that the claimed treaty country actually has a treaty with the US, that the cited article exists, that it covers the income type being paid, and that the claimed rate is consistent with current treaty tables. If the contractor claims a treaty rate for a country without a US treaty, or cites a treaty that has been suspended, you are liable for under-withholding. Verify against IRS Publication 515 and the IRS Tax Treaty Tables.

Not filing Forms 1042 and 1042-S when required. The 1099 reporting used for US contractors does not apply to foreign contractors. The forms, the deadlines, and the IRS filing systems are entirely separate. Businesses that issue 1099s correctly but fail to file 1042-S for foreign contractors have a compliance gap.

Using W-8BEN for a foreign entity. A contractor who invoices through a registered foreign company must provide W-8BEN-E, not W-8BEN. Using the wrong form does not constitute valid documentation; the payment is treated as undocumented and the 30% default rate applies.

Confusing 1042-S with 1099-NEC. These are different forms with different deadlines and different penalty structures. Assuming that no withholding automatically means no filing obligation is also incorrect: reporting may still be required at a zero withholding rate.

What changes with a Contractor of Record

Both forms rest on who you pay. When you pay a contractor directly, every step in this guide is yours: you collect the W-9 or W-8BEN, make the withholding determination, apply the treaty or default rate, and file the 1099-NEC or the 1042-S.

With a Contractor of Record, that relationship changes. The CoR contracts directly with each contractor, and you pay the CoR as a commercial vendor, in a standard business-to-business payment. Your accounts payable team collects the CoR’s own vendor tax documentation, not a W-9 or W-8BEN from each contractor. The contractors’ tax forms sit between the CoR and the contractor.

Under Ruul’s Contractor of Record model, Ruul contracts with each contractor and runs their identity and AML checks. It handles their tax paperwork where applicable: a W-9 from US contractors, W-8 forms from non-US contractors when requested, and 1099 documentation for US reporting needs. Every payment comes with a business-ready invoice from Ruul.

What stays with you: classifying the working relationship correctly, your company’s own taxes, and records of what you paid Ruul. Confirm with your tax advisor how to treat those payments for your tax year.

FAQs

Do I always need to withhold US tax from payments to foreign contractors?

Not necessarily. Withholding depends on whether the income is US source, whether services are performed inside the US, the contractor’s foreign status, and whether an applicable tax treaty reduces or eliminates the rate. Many contractors performing services entirely outside the US may not be subject to US withholding. However, this must be evaluated case by case with professional advice. The source-of-income rules are technical, and the consequences of getting them wrong include back taxes and penalties.

How often should I ask my international contractors to update their W-8BEN?

Obtain a new W-8BEN at least every three calendar years, consistent with the general validity rules. Also request an updated form immediately whenever a contractor’s circumstances change in a way that affects foreign status or treaty eligibility, such as moving to a different country, changing citizenship, or becoming a US resident. Build expiry tracking into your process so you are never paying a contractor against an expired form.

Do I need a new W-9 from a contractor every year?

Not automatically. If the contractor’s name, address, TIN, and federal tax classification have not changed, the form on file remains valid. Review your vendor list once a year and request a new W-9 when you see signs of change or when a form is several years old, particularly for contractors you pay significant amounts. A change of name, address, TIN, or business structure always requires a new form.

What happens if I pay a foreign contractor without any W-8BEN on file?

The IRS may require you to treat those payments as made to an undocumented foreign person. This typically means retroactive 30% withholding on US-source income, plus potential interest and penalties. Consult a tax professional as soon as you discover such a gap to determine next steps and mitigate exposure.

Can I refuse to pay a contractor until I receive their W-9?

Yes, and most businesses make it an explicit policy. Spell it out in the engagement contract or onboarding materials so contractors know the requirement from the start. If a contractor still refuses, decide whether to go ahead with the engagement at all; if you do, apply backup withholding under IRS rules.

Is an ITIN acceptable on Form W-9 instead of an SSN?

In certain cases, yes. Individuals who are US persons but do not have a Social Security Number may use a valid Individual Taxpayer Identification Number (ITIN) on Form W-9. ITINs not used on a federal tax return for three consecutive years expire and need renewal, and an expired ITIN can cause processing problems even when the form looks complete. Check the Instructions for Form W-7 with a qualified tax advisor before relying on one.

Can I use the same W-8BEN for both dividends and contractor service payments?

A single W-8BEN can certify a person’s foreign status for multiple types of income. However, treaty articles and withholding rules differ for dividends, interest, royalties, and personal services income. If your contractor receives both passive income and fees for services, verify that the treaty claims on the form actually cover each income type. An article covering royalties does not automatically cover service fees. Review each income type separately against the treaty text with qualified counsel.

How does paying through a platform or Ruul change my W-9 and W-8BEN responsibilities?

Some payment platforms and processors report contractor payments themselves, for example on Form 1099-K, which can change whether you file a 1099-NEC, and they often collect W-9 data from contractors. Check what your platform does. With Ruul’s Contractor of Record model, you pay Ruul as a vendor and keep Ruul’s vendor documentation, while Ruul handles contractor tax forms where applicable (W-9 for US contractors, W-8 forms for non-US contractors when requested). You can also use Ruul to stay organized and tax-ready with centralized document storage across your global contractor base.