A simple decision in theory, a messy one in practice
Most US founders assume paying a contractor in Manila or Buenos Aires is the same as paying a contractor in Austin. Send the invoice, hit the button, move on.
It is not. The IRS treats US and foreign contractors very differently. The right tax form, the right withholding rate, and the right information return depend on where the contractor lives, where the work is performed, and whether a tax treaty applies. Get it wrong and you face two unpleasant outcomes: a 30 percent withholding bill the IRS expects you to have collected, or a misclassification claim from US or foreign labor authorities.
This guide walks through the 2026 rules in plain English, with the IRS pages and statutes cited inline.
Step 1. Decide if the contractor is a US person or a foreign person
The first fork in the road is residency, not citizenship. A US person is a US citizen, a US permanent resident, or anyone who passes the IRS substantial presence test. Everyone else is a foreign person.
For US persons you collect Form W-9 before paying anything. The form gives you the contractor’s TIN, which you need to file a 1099 later.
For foreign individuals you collect Form W-8BEN. For foreign entities (corporations, LLCs registered abroad, partnerships) you collect Form W-8BEN-E. Both forms certify the contractor is not a US person and can be used to claim treaty benefits where one applies.
Collect these forms before the first payment, not after. The IRS expects them on file at the time of payment, and a missing form can flip the contractor into a default 30 percent withholding bucket.
Step 2. Determine where the services are performed
This is the rule that surprises most founders. Under IRS sourcing rules for personal service income, the source of services income is the place where the services are physically performed, not where the contract is signed, not where the payer is located, and not where the bank account sits.
A developer working from her flat in Bengaluru is performing services in India. A designer working from a cafe in Manila is performing services in the Philippines. The IRS treats both as earning foreign source income.
This matters because services performed outside the United States by a nonresident alien are foreign source income and are generally not subject to US withholding or Form 1042-S reporting. You still collect the W-8 to document foreign status, but the actual withholding and reporting machinery does not run.
If any portion of the work is performed inside the United States (say, the contractor visits for a two-week sprint), that portion becomes US source income and is subject to withholding rules.
Step 3. Know your reporting forms
For US contractor payments, Form 1099-NEC is the standard information return. Starting with payments made after December 31, 2025, the reporting threshold increased from $600 to $2,000 under the One Big Beautiful Bill. Below that amount you do not need to file the 1099-NEC, but the income is still taxable to the contractor.
For payments to foreign persons of US source income, the relevant return is Form 1042-S. The withholding agent must file Form 1042-S even if no tax was withheld, as long as the payment is US source FDAP income to a foreign person. Form 1042-S filings are paired with the annual return on Form 1042. Both are due by March 15 of the year after payment.
If the services are performed entirely outside the US, the payment is foreign source, and you generally do not file 1042-S for it.
Step 4. The 30 percent default and when treaties help
When a foreign contractor performs services inside the US and US source income arises, the statutory withholding rate under IRC sections 1441 through 1443 is 30 percent of the gross payment. That rate applies unless a tax treaty reduces it.
To claim a treaty benefit, the contractor files Form 8233 with the withholding agent. The form claims exemption from withholding on independent personal services compensation under a specific treaty article. The withholding agent then forwards the accepted form to the IRS within five days.
Publication 515 is the primary reference for withholding agents and lists which treaties cover independent personal services and what conditions apply.
Step 5. Choose a payment rail
Once the tax position is clear, the payment mechanics are the easier part.
ACH is the cheapest option for paying a US person with a US bank account. It is slow (one to three business days) but the cost per payment is typically a few dollars or less.
Domestic wire is faster but more expensive. For paying foreign contractors, you cannot use ACH (it is a US-only rail).
SWIFT international wire is the universal correspondent banking rail. It works to almost any country but tends to carry both a flat sender fee and an intermediary bank deduction. The contractor often receives noticeably less than the sender amount due to FX margin and intermediary fees.
Specialist FX rails like Wise, Payoneer, and Skydo route through local in-country banking partners and bypass the SWIFT correspondent chain. They quote the mid-market FX rate or close to it, charge a transparent margin, and deliver in one to two business days in most corridors.
Stripe Connect and similar platforms can pay contractors in their local currency where Stripe supports the corridor. The fee structure depends on the destination.
Choosing the wrong rail can cost more than the contractor’s invoice over the course of a year, especially in volatile FX corridors like INR, PHP, and ARS.
Step 6. Address misclassification risk
US misclassification risk falls under two regimes worth knowing.
The federal test is the Department of Labor economic reality test, finalized in the 2024 rule, effective March 11, 2024. It examines six factors using a totality of the circumstances analysis, with no single factor controlling. Worker investment, opportunity for profit or loss, permanence, control, integral nature of the work, and skill all weigh in.
The IRS uses its own common law test, summarized as behavioral control, financial control, and the relationship of the parties. The two tests overlap but are not identical.
State law adds another layer. California Labor Code Section 2775, codified from AB5, applies the ABC test for California-based workers. Under the ABC test, a worker is an employee unless the hiring entity proves all three prongs: the worker is free from control, the work is outside the usual course of the hiring entity’s business, and the worker is engaged in an independently established trade.
Foreign misclassification risk lives in the contractor’s home country. India, Brazil, Mexico, the Philippines, and most of Europe have their own tests. A US-style contractor agreement is not automatically respected abroad if the working relationship looks like employment in substance.
A sample workflow for onboarding a foreign contractor
Here is a clean end-to-end flow for a US company hiring its first remote engineer in, say, Bengaluru.
- Confirm the contractor is a foreign person not a US person, and that all work will be performed in India.
- Send the contractor a W-8BEN and a Statement of Work or Master Services Agreement. The SOW should describe deliverables, payment terms, IP assignment, confidentiality, and termination.
- Confirm the work is performed outside the US, which means the income is foreign source and no US withholding or 1042-S reporting is required.
- Choose a payment rail. SWIFT or a specialist FX provider for INR. Confirm the contractor has correctly registered with their bank for export receipts under Indian RBI rules.
- Pay the invoice on the agreed schedule. Keep contracts, invoices, payment receipts, and the W-8BEN on file for at least four years.
- Review the engagement for misclassification risk at the six-month mark. If the contractor is full-time, has no other clients, and is integrated into your team, consider converting to an employer of record arrangement.
A platform like Omnivoo Contract Management automates steps 2 through 5 and stores the audit trail for step 6. The flat $49 per contract price keeps the math simple regardless of the country.
Common mistakes that trigger IRS letters
Three patterns show up in IRS correspondence to US companies about international contractors.
First, no W-8 on file. The company paid a foreign contractor for years without collecting a W-8BEN. When audited, the company cannot prove the foreign status, and the IRS defaults the contractor to US person treatment with backup withholding consequences.
Second, mixed performance location not allocated. The contractor visited the US for a one-month sprint but the company never allocated that portion of the year’s fees as US source income. IRS rules require allocation by days of service performed in the US when work is performed partly in the US and partly outside.
Third, late 1042-S filings. The company correctly identified a foreign contractor with US source income but missed the March 15 filing deadline. Penalties for late information returns are mechanical and add up fast.
When to use a platform vs DIY
A two-person startup paying one contractor in one country can probably DIY the forms and the payment. A US company paying ten contractors across five countries cannot.
The breakpoints are usually administrative. Once you are tracking multiple W-8s, multiple FX corridors, multiple invoice cycles, and multiple year-end information returns, the time cost of DIY exceeds a platform fee. See our pricing page for the full breakdown of platform fees vs DIY costs.
For comparison of contract management versus deeper compliance options, see our explainer on contract management vs contractor of record.
Pulling it together
The 2026 rules are not that complicated once you separate three questions: is the contractor a US person, where is the work performed, and is there a treaty. Answer those three and the form, the rate, and the report follow.
Doing it well manually is possible. Doing it well across many countries and many contractors is where Omnivoo Contract Management earns its keep. We draft the SOW, collect the tax forms, run the FX payment, and store the audit trail, for a flat $49 per contract regardless of destination country. See how Contract Management works or talk to our team if you want a walkthrough on your specific contractor stack.