The US is one of the most litigation-prone environments in the world for worker misclassification. Federal agencies, state agencies, and plaintiffs’ attorneys all have strong incentives to scrutinise how companies classify their workers, and the financial consequences of getting it wrong can be severe. If you’re engaging US-based contractors, understanding how the classification tests work, and where the risks concentrate, is essential before you sign your first agreement.
How contractor engagement works in the us
Independent contractors in the US typically operate as sole proprietors or through single-member LLCs. Some use S-corporations for tax efficiency. The legal form the contractor uses matters less than how the working relationship functions in practice. What determines classification is the substance of the relationship, not the label either party puts on it.
When you engage a contractor, you don’t withhold federal income tax or FICA contributions from payments. The contractor pays self-employment tax at 15.3% on their own income. Your administrative obligations are simpler than for employees: collect a completed Form W-9 before the first payment, and issue a Form 1099-NEC for any contractor you pay $600 or more in a calendar year. The 1099-NEC is due to the contractor and filed with the IRS by January 31.
Federal classification tests: irs and dol standards
Two federal agencies assess worker classification, and they apply different tests. You need to satisfy both.
The irs common law test
The IRS uses a three-category analysis to determine whether a worker is an employee or an independent contractor.
Behavioural control looks at whether you direct how the work is done, not just what the outcome should be. If you control the method, sequence, timing, and tools used to complete the work, that’s an employment indicator.
Financial control examines whether you control the business aspects of the worker’s activities. Key factors include whether the worker has a significant investment in their own tools or facilities, whether they can realise a profit or loss, whether they work for multiple clients, and whether their services are available to the general market.
Type of relationship looks at written agreements, whether employee-type benefits are provided, the permanency of the relationship, and whether the work performed is a key aspect of your regular business.
No single factor is automatically decisive. The IRS weighs all of them together.
The dol economic reality test
The Department of Labor (DOL) applies a separate test under the Fair Labor Standards Act. The 2024 rule that was in effect used a six-factor “totality of the circumstances” economic reality test, looking at the overall economic dependence of the worker on the hiring entity.
As of April 14, 2026, a proposed rule published on February 27, 2026 would replace that standard with a simplified two-factor approach focused on (1) the nature and degree of control over the work, and (2) the worker’s opportunity for profit or loss based on their own initiative or investment. The comment period for the proposed rule runs through April 28, 2026, and the rule hasn’t been finalised. The 2024 six-factor rule remains in effect while the rulemaking process continues.
State classification rules: the abc test
Federal standards are only part of the picture. Many states impose stricter classification rules that apply independently of federal law.
California’s AB5, in effect since 2020, uses a strict ABC test. A worker is presumed to be an employee unless the hiring entity proves all three of the following: (A) the worker is free from the company’s control and direction in performing their work, (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, occupation, or business.
The “B” prong is the most significant barrier. If a software company hires a software developer as a contractor, that work is within the usual course of the business, and the ABC test almost certainly can’t be satisfied. California’s standard is one of the strictest in the country.
New Jersey, Massachusetts, and several other states use similar ABC tests with their own variations. If you’re engaging contractors in multiple states, you need to assess each state’s rules separately.
Practical misclassification risk factors
Across both federal and state standards, certain patterns generate the most risk.
Long-term, exclusive relationships look like employment. If a contractor works only for you over an extended period, that economic dependence is a strong misclassification signal regardless of the contract label.
Integration into your operations matters. If the contractor uses your equipment, works from your premises, attends internal meetings, or appears in your org chart, that integration supports a finding of employment.
Lack of a distinct business presence is a red flag. A genuine independent contractor typically has their own business, their own clients, their own tools, and the ability to work for multiple clients simultaneously.
Controlling working hours or requiring availability erodes the independence that defines a contractor relationship. If you’re setting schedules or requiring the contractor to be online during specific hours, that behaviour looks like direction and control.
Tax and administrative obligations
When you engage a genuine independent contractor, your tax obligations are limited but specific.
Collect Form W-9 before making any payment. This gives you the contractor’s taxpayer identification number and certifies their status. Issue Form 1099-NEC by January 31 for any contractor paid $600 or more in the calendar year, and file copies with the IRS by the same date. Keep records of all payments in case of an IRS inquiry.
You don’t withhold income tax, Social Security, or Medicare from contractor payments. The contractor is responsible for making estimated quarterly tax payments and paying self-employment tax. If you fail to collect a W-9 and the contractor doesn’t provide a valid TIN, backup withholding at 24% may apply.
Consequences of misclassification
Misclassification in the US can trigger liability across several agencies simultaneously.
The IRS can assess back FICA taxes covering both the employer and employee shares, unpaid income tax withholding, and substantial penalties and interest, going back multiple years from the date of audit.
The DOL can recover back wages including minimum wage and overtime pay that should have been paid under the FLSA, plus liquidated damages equal to the unpaid amount.
State agencies can add their own layer of liability: state income tax withholding, state unemployment contributions, paid sick leave accruals, and any state-mandated benefits that employees are entitled to.
Workers can sue in civil court. Class action lawsuits are common in misclassification cases, particularly in California. Settlements and judgments can involve very large amounts when multiple workers are affected.
There’s also benefits exposure. Reclassified workers may be entitled to retroactive health insurance, 401(k) participation, paid vacation accruals, and other benefits you offered to employees.
Safer alternatives: cor and EOR
If your engagement carries genuine misclassification risk, two compliant structures are worth knowing.
A Contractor of Record (CoR) engages the contractor through a properly structured legal arrangement. The CoR handles the contract, payments, and compliance. You direct the work and receive the output. This is particularly useful when the engagement doesn’t fit cleanly within a clear project-based model, or when you want to engage contractors across multiple states without managing the administrative complexity yourself.
For engagements that have genuinely shifted toward an employment relationship, an Employer of Record (EOR) is the right structure. An EOR employs the worker in the US on your behalf, handling all payroll, benefits, tax withholding, and compliance. You get the talent without the legal exposure. You can compare providers through this overview of EOR services, and the Contractor of Record guide explains how the two structures differ in practice.
Getting it right from the start
The US has more misclassification enforcement activity than most other countries, and the financial exposure from getting it wrong is meaningful. The good news is that compliant contractor engagement is straightforward when you structure it correctly.
Keep relationships genuinely project-based, give contractors control over how they work, avoid exclusivity, and document your arrangements clearly. If an engagement starts to look more like employment, especially in a state like California, restructure it before it becomes an issue.
Book a demo to see how RemotePass supports compliant contractor and employee engagements across the US.
