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The ABC Test is a strict worker-classification standard, used in California under AB5 and in several other states, that presumes a worker is an employee unless the hiring company can prove all three of the following conditions: (A) the worker is free from the company's control and direction in performing the work; (B) the work is performed outside the usual course of the company's business; and (C) the worker is customarily engaged in an independently established trade, occupation, or business of the same nature as the work performed. Because the burden of proof sits with the hiring company, a worker is treated as an employee by default. Failing even a single prong means the worker must be classified as an employee, which makes the ABC Test considerably harder to satisfy than the multi-factor IRS common-law test. Whether the ABC Test applies is determined by where the work is physically performed, not where the company is headquartered.
The ABC Test flips the usual analysis on its head. Instead of weighing many factors to decide whether someone looks like an independent contractor, it starts by assuming the worker is an employee and forces the hiring company to earn a contractor classification by proving all three prongs. All three must be satisfied simultaneously — the test is conjunctive, not a balancing act.
Prong B is where most companies stumble, because it is difficult to argue that talent doing your core work is somehow outside your usual course of business. This is what makes the ABC Test the strictest classification standard in wide use and a frequent source of worker misclassification exposure.
Most companies are familiar with the federal IRS common-law test, which weighs behavioral control, financial control, and the relationship between the parties across many factors with no single one being decisive. The ABC Test is narrower, more rigid, and easier to fail — a worker who passes the common-law test can still be an employee under the ABC Test.
| Feature | ABC Test | IRS Common-Law Test |
|---|---|---|
| Default assumption | Worker is an employee | No presumption; facts weighed |
| Structure | Three prongs, all required | Multi-factor balancing |
| Burden of proof | On the hiring company | Shared / fact-dependent |
| Where it applies | CA (AB5) and select states | Federal / IRS nationwide |
Because the ABC Test applies based on where the work is performed, a single company can face different classification standards across its workforce depending on each worker's state.
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Book a Demo The ABC Test rose to national attention with California's AB5, and versions of it now appear in the wage, unemployment, or labor codes of several other states, including New Jersey, Massachusetts, and Illinois. Misclassifying a worker who should be an employee under the ABC Test can trigger serious consequences.
Because applicability turns on the location of the work, companies using contingent labor across multiple states cannot rely on a single nationwide classification policy. Each engagement needs to be evaluated against the standard that governs where the work is actually performed, making workforce compliance a state-by-state exercise.
WorkGenius removes the classification guesswork from engaging contingent talent. We assess worker classification before every engagement, applying the correct standard — including the ABC Test — based on where the work is performed, so you are not left interpreting state-by-state rules on your own.
Where a worker should be classified as an employee, WorkGenius steps in as the Employer of Record across all 50 US states and 100+ countries, taking on the compliance, payroll, and tax obligations that come with employment. Our platform combines AI matching with expert human recruiters and gives you one place to source, classify, onboard, manage, and pay contingent talent — turning a fragmented, high-risk compliance problem into a single managed workflow. That means you can access an on-demand talent pool with confidence, knowing each contingent worker is classified correctly from day one.
The three prongs are: (A) the worker is free from the company's control and direction in performing the work; (B) the work is performed outside the usual course of the company's business; and (C) the worker is customarily engaged in an independently established trade, occupation, or business of the same nature. A company must satisfy all three to classify someone as an independent contractor.
Failing any single prong means the worker must be classified as an employee. The ABC Test is conjunctive, so a company cannot make up for a weak prong by strongly satisfying the other two — all three conditions must be met at the same time.
Yes. The ABC Test presumes employee status and places the full burden of proof on the hiring company, while the IRS common-law test weighs many factors without a default assumption. A worker can pass the common-law test and still be an employee under the ABC Test.
California applies the ABC Test through AB5, and several other states use a version of it in their wage, unemployment, or labor codes. Because it applies based on where the work is physically performed, companies with talent in multiple states may face different classification standards for different workers.
WorkGenius assesses worker classification before every engagement using the standard that applies where the work is performed, and acts as Employer of Record across all 50 US states and 100+ countries when a worker should be an employee. This lets you engage contingent talent without carrying misclassification risk yourself.
Explore more concepts in our workforce glossary
The error of treating someone who legally qualifies as an employee as an independent contractor — exposing companies to back taxes, penalties, and retroactive benefits liability.
Learn moreCalifornia's AB5 law codified the ABC test, presuming California workers are employees unless a company proves all three prongs.
Learn moreThe IRS right-to-control test that weighs behavioral control, financial control, and relationship type to classify workers as employees or contractors.
Learn moreA third-party organization that legally employs workers on your behalf, handling all payroll, taxes, benefits, and compliance while you direct the work.
Learn moreWorkGenius combines AI-powered talent matching with enterprise-grade compliance. Source, onboard, manage, and pay freelancers globally — all from one platform.
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