Paying foreign employees means one of two situations, and they have different rules. Either the person works inside the United States, where the question is their tax residency status and the withholding mechanics that follow from it, or they work in their own country, where the question is who their legal employer is and which country's payroll obligations apply. US employers get both wrong in the same way: by treating the payment as the problem and the employment structure as an afterthought. The IRS publishes the rules for both situations, and the structure question, entity, employer of record, or genuine contractor, decides everything downstream. Nothing here is legal or tax advice; statutes and contracts control.
Foreign employees working in the United States
For a non-US-citizen on a US payroll, the first step the IRS requires is classification: every worker who is not a US citizen must be identified as a resident alien or a nonresident alien under the tax code's rules. Resident aliens are then treated like citizens for income tax withholding. Nonresident aliens face special rules: they complete Form W-4 under the specific instructions in Notice 1392, cannot claim exempt status, and must generally select single filing status regardless of marital status; if no valid W-4 is filed, withholding defaults to single with no adjustments. Where a tax treaty exempts the wages, the employee claims it on Form 8233 and the employer reports the treaty-exempt wages on Form 1042-S rather than in the normal wage boxes. There are narrow statutory exceptions, including one for nonresident aliens present under 90 days in the year with compensation not exceeding $3,000 paid by a foreign employer, but the safe assumption is that US work means US withholding until a specific rule says otherwise.
Foreign employees working in their own country
For a person working entirely outside the United States who is not a US citizen or resident, the US side is clean: the IRS states that wages earned by nonresident aliens for services performed outside the United States are foreign source income, not subject to US federal income tax withholding or reporting. The obligations that matter are the local ones, and they need a local employer. That leaves three routes: your own foreign entity, which suits scale in one country; an employer of record, whose local entity employs the person, runs payroll and remits local taxes while you direct the work, which suits small headcounts; or a genuine contractor engagement. The route decides the paperwork, the costs and the risk, and it should be chosen on employment law grounds, not on which one your bank makes easiest.
The contractor boundary, on both sides of the border
The tempting shortcut is to pay everyone abroad as a contractor and skip employment structure entirely. It holds only when the facts hold. The IRS test for employee status looks at behavioural control, whether the company directs how the work is done; financial control, who provides tools and how the worker is paid; and the type of relationship, including permanence and whether the work is core to the business, with no fixed number of factors deciding alone. Foreign labour law runs equivalent tests, often stricter and enforced with reclassification, back contributions and penalties. A full-time person working exclusively for you, under your direction, on your systems, is an employee in substance in nearly every jurisdiction, and the invoice does not change that. Misclassification across a border compounds: two tax authorities, two labour regimes, one arrangement that satisfies neither.
Practical mechanics once the structure is right
With the employment route settled, the payment layer is discipline rather than difficulty. Pay employees in the currency their contract states, normally local currency, on the schedule local law requires, with payslips where mandated. Keep the classification file for each person: the contract, the W-4 or Form 8233 for US-based staff, and for EOR arrangements the specimen invoice and evidence that local remittances actually happen, reconciled monthly against your bank movements, because deductions taken and not remitted is the recurring failure in outsourced payroll. Revisit annually: a contractor whose engagement has deepened may need converting to employment, a US-based nonresident alien may become a resident alien as presence accumulates, and an EOR that fits two hires in a country may be outgrown at twenty. The structures are stable; the facts underneath them move.
Questions people ask about how to pay foreign employees
Do I withhold US taxes for a foreign employee working remotely from abroad?
If the person is a nonresident alien performing all services outside the US, no: the IRS treats those wages as foreign source income outside US withholding and reporting. Their own country's income tax and social contributions still apply, through whoever legally employs them there.
What forms apply to a nonresident alien employee in the US?
Form W-4 completed under Notice 1392's special rules for withholding, Form 8233 where a tax treaty exempts the wages, and employer reporting of treaty-exempt amounts on Form 1042-S. Without a valid W-4, withholding defaults to single status with no adjustments.
Can I pay a foreign employee through my US payroll provider?
For US-based work, yes, with the right status classification. For work performed abroad, US payroll alone leaves the local country's employer obligations unmet; you need a local employer, your own entity or an EOR, or a genuinely independent contractor relationship.
What happens if a contractor abroad is really an employee?
Local authorities can reclassify the relationship, assess back social contributions and taxes with penalties, and apply employment protections retroactively; severance exposure often follows. The cost usually dwarfs what lawful employment through an EOR would have cost from the start.