The United States has the world’s largest and most sophisticated contractor market, with tens of millions of independent workers operating across every sector of the economy. The IRS worker classification framework, Form 1099-NEC reporting, and state-by-state misclassification rules make US contractor compliance one of the most consequential areas of employment law for international and domestic employers. This guide covers worker classification, IRS requirements, and payment options for international employers.

The Benefits of Doing Business in the United States

  • The US contractor market provides access to world-class professional talent across every sector — technology (Silicon Valley, Austin, New York, Seattle), finance (New York, Chicago, Boston), creative industries (Los Angeles, New York), engineering, legal, and management consulting — at every level of seniority and specialisation.
  • English is the primary business language in the United States, making project communication, deliverables, and contract management straightforward for international employers without translation overhead in the English-speaking world’s largest professional market.
  • The US covers six time zones from Eastern (UTC-5) to Pacific (UTC-8), and its major technology hubs — the East Coast and West Coast — provide overlap with both European morning hours and Asia-Pacific afternoon hours, accommodating global team coordination across a wide range of working schedules.
  • The US dollar is the world’s primary reserve and international business currency, eliminating foreign exchange risk for all USD-denominated organisations and providing a universally recognised payment standard for international contractor arrangements.

What Are Independent Contractors in the United States?

In the United States, an independent contractor is a worker who is not an employee under federal law (the Fair Labor Standards Act, IRS regulations, and various state statutes). The IRS uses a multi-factor behavioural, financial, and relationship control test to assess worker status. Key markers of genuine independent contractor status include the ability to set their own hours and methods, serving multiple clients, investing in their own tools and equipment, bearing their own business risk, and operating without an employer-type relationship.

Contractors are responsible for their own self-employment tax (15.3% of net earnings up to the Social Security wage base, plus 2.9% Medicare above), federal and state income tax quarterly estimated payments, and are not entitled to the employment benefits available to employees — employer Social Security and Medicare matching (7.65%), unemployment insurance (FUTA/SUTA), workers’ compensation, or statutory employee benefits.

Differences Between Employees and Independent Contractors in the United States

The table below outlines the key legal and practical distinctions.
Aspect Employee Independent Contractor
Business Integration Employee; directed by employer on how, when, and where to work; uses employer tools and equipment; subject to company HR policies. Independent contractor; retains control over methods, schedule, and tools; outcome-focused engagement.
Financial Risk Employer bears risk; employee receives regular wages with employer tax and benefits obligations. Contractor bears own business risk; invoices for services; no guaranteed income or benefits from client.
Leave & Entitlements Federal FMLA leave, employer-matched Social Security/Medicare (7.65%), potential health/retirement benefits (varies by employer), workers’ compensation. No statutory federal leave or benefits from client; contractor manages own health insurance, retirement savings, and self-employment tax.
Termination Subject to applicable federal and state employment laws; state-specific wrongful termination protections. Governed by the services agreement — notice clauses and project completion terms. No employment law termination protections.
Payment Structure W-2 payroll with federal/state income tax withheld; employer Social Security and Medicare (7.65%) paid; FUTA and SUTA remitted. Form 1099-NEC issued for payments over USD 600 per year; no withholding for US citizens/residents (non-resident aliens may require 30% backup withholding on Form 1042-S).

Business Integration

The IRS uses a three-category behavioural, financial, and relationship test for worker classification. Behavioural control: does the client direct how the worker performs tasks? Financial control: does the worker invest in their own tools, set their own rates, and serve multiple clients? Relationship type: is there a written contract, does the worker receive benefits, and is the relationship permanent? A worker who is controlled in all three dimensions will typically be classified as an employee. State-level tests (California’s ABC test, Massachusetts’ ABC test) are often stricter than the IRS test and must be satisfied independently.

Financial Risk

Employees receive regular wages with employer-side tax obligations. US independent contractors invoice for deliverables, set their own rates, invest in their own professional equipment, bear the full 15.3% self-employment tax (covering both the employer and employee portions of Social Security and Medicare), and have no guaranteed income from any single client.

Leave & Entitlements

US employees may receive employer health insurance, retirement plan contributions (401k match), paid time off, workers’ compensation coverage, and FMLA leave rights. Employer-side Social Security and Medicare taxes (7.65%), FUTA (0.6%), and SUTA add to total employment costs. Independent contractors receive none of these from clients — they manage their own health insurance, retirement savings, and pay 100% of FICA through self-employment tax.

Termination

US employees in most states are employed “at-will” but have state-specific wrongful termination protections and, where applicable, WARN Act notice requirements for mass layoffs. Independent contractors have no equivalent protections — the services agreement governs the relationship’s termination on agreed notice terms.

Payment Structure

Employers run W-2 payroll with federal and state income tax withheld and employer-side taxes remitted. Clients paying US citizen or resident contractors USD 600 or more per calendar year must issue a Form 1099-NEC and file a copy with the IRS by January 31. Clients must obtain a Form W-9 from each US contractor before the first payment. Non-US contractors providing services from outside the US are generally not subject to US withholding, but Form W-8BEN or W-8BEN-E should be collected.

Misclassification of Independent Contractors and Its Consequences

US contractor misclassification is among the most expensive employment law risks globally. Federal liability includes back FICA taxes (employer share 7.65% for all back wages), federal income tax withholding shortfalls, FUTA, IRS penalties, and interest. State-level liability adds back state income tax withholding, SUTA, and, in states with strict classification laws (California, Massachusetts), potential wage and hour violations, back overtime, minimum wage claims, and civil penalties. California’s AB5 (2019) and the ABC test have been particularly consequential for technology and gig economy companies. The Department of Labor, IRS, and state agencies all have independent enforcement authority, and private class action lawsuits are common.

Benefits of Hiring Independent Contractors in the United States

World's Deepest Professional Talent Market

The US contractor market offers unparalleled depth and specialisation across every professional discipline. From AI/ML engineers in San Francisco to derivatives lawyers in New York to clinical trial specialists in Boston, the breadth and seniority of available US contractor talent is unmatched globally.

No Federal Withholding for US Contractors

(citizens/residents). The contractor manages their own quarterly estimated tax payments with the IRS and state agencies. This simplifies the payment administration for the client compared with payroll, which requires ongoing withholding and remittance.

Project-Based Workforce Flexibility

The US contractor market is highly flexible by design — contractors expect project-based, outcome-focused engagements without the permanency expectations common in many civil law systems. For technology, consulting, and creative industries, this project orientation aligns naturally with agile, deliverable-focused ways of working.

USD Currency and Financial Infrastructure

The US dollar and the US banking system provide the world’s most liquid and internationally accessible payment infrastructure. ACH, wire, check, and digital payment platforms are all universally accessible for US contractor payments, with the same-day or next-day settlement infrastructure expected by US professionals.

Key Considerations for Hiring an Independent Contractor in the United States

State-by-State Classification Laws

Worker classification rules vary significantly by state. California’s ABC test (under AB5) presumes workers are employees unless the business can satisfy all three prongs of the ABC test — a high bar that has fundamentally changed contractor arrangements for many California workers. Massachusetts, New Jersey, Illinois, and other states have similarly strict tests. Any contractor engagement in California or Massachusetts requires specialist state law compliance review before commencement.

The Written Agreement

A services agreement should clearly establish the independent contractor relationship, include a right to substitute, specify deliverables rather than hours, confirm the contractor’s obligation to pay self-employment taxes, specify fees and invoicing terms, address IP ownership, and include a notice period. Include an explicit statement that the agreement does not create an employer-employee relationship. Obtain a signed Form W-9 from every US contractor before the first payment.

Intellectual Property

US copyright law vests default ownership in the creator, except for works made for hire. Software created by an independent contractor is not a “work made for hire” by default — it belongs to the contractor unless the agreement explicitly assigns all rights to the client. Include a comprehensive IP assignment clause covering all code, designs, written content, and other deliverables.

Tax Law for Contractors in the United States

Clients paying US citizen or resident independent contractors USD 600 or more in a calendar year must issue a Form 1099-NEC to the contractor and file a copy with the IRS by January 31. No income tax, Social Security, or Medicare is withheld from contractor payments. Before making the first payment, collect a completed Form W-9 confirming the contractor’s name, address, and Taxpayer Identification Number (TIN/SSN/EIN). Backup withholding of 24% applies if a W-9 is not provided.

US independent contractors pay self-employment tax at 15.3% on the first USD 168,600 of net self-employment income (2024 Social Security wage base) and 2.9% Medicare on all net income above that, plus the 0.9% Additional Medicare Tax on earnings above USD 200,000 (individual) or USD 250,000 (married filing jointly). Contractors make quarterly estimated tax payments to the IRS (and applicable state agencies) by April 15, June 17, September 16, and January 15.

Foreign companies paying non-resident alien (NRA) contractors for services performed outside the United States generally owe no US withholding tax. If a foreign contractor performs services within the United States, 30% backup withholding may apply on US-source income unless reduced by a tax treaty. Collect Form W-8BEN (individual) or W-8BEN-E (entity) from non-US contractors to confirm their foreign status and applicable treaty rate.

How to Pay an Independent Contractor in the United States?

ACH / Wire Transfer

ACH transfers in USD are the standard domestic payment method for US contractor payments — low cost, same-day or next-day settlement, and universally supported by US banks (Chase, Bank of America, Wells Fargo, Citibank, regional banks, credit unions). Wire transfers settle same-day and are preferred for large individual payments.

Wise

Wise supports USD transfers to US bank accounts from international payers and is the most cost-effective channel for non-US employers making regular USD payments to US contractors. Wise’s US routing/account number infrastructure allows payments to be received by any US bank account at ACH rates.

Cheque

Paper checks remain a common payment method for US independent contractors, particularly in legal, consulting, and traditional professional services. For international employers, ACH or wire are more practical, but US-entity payers may use check for straightforward single contractor arrangements.

PayPal / Venmo Business / Zelle

PayPal Business, Venmo Business, and Zelle are widely used for smaller US contractor payments. From 2024, platforms including PayPal and Venmo are required to issue Form 1099-K for payments above USD 600, aligning with the 1099-NEC reporting threshold for contractor arrangements.

Hire Contractors in the United States With Our Support

The US contractor market offers unmatched professional depth and flexibility — but IRS worker classification rules, state-level ABC tests, 1099-NEC reporting obligations, and California AB5 compliance require specialist knowledge. RemotePeople’s US team provides Contractor of Record services, worker classification assessments, and compliance management for US Contact us to get started.

Frequently Asked Questions

Form 1099-NEC is the IRS information return that US clients must issue to any independent contractor who is a US person and received USD 600 or more in the calendar year. It must be provided to the contractor and filed with the IRS by January 31 of the following year. Failure to file timely 1099-NEC returns results in IRS penalties per form. Collect Form W-9 from every US contractor before making the first payment.
California's AB5 (2019) codified the ABC test for worker classification. Under the ABC test, a worker is presumed to be an employee unless the engaging party can prove all three prongs: (A) the worker is free from control, (B) the work is outside the usual course of the company's business, and (C) the worker is customarily engaged in an independently established trade or business. Prong B is the most difficult to satisfy — it means companies cannot use contractors for their core business activities. Violations result in significant wage and hour liability.

ACH transfers in USD are the standard domestic method — same-day or next-day, low cost, universally accepted. Wise provides a practical USD payment channel for non-US international employers at competitive rates. Always collect a signed Form W-9 before the first payment and issue Form 1099-NEC by January 31 for contractors paid USD 600 or more in the year.