The ABC Test is a three-prong worker classification test used by many US states to determine whether a worker is an employee or an independent contractor, with the hiring entity bearing the burden to prove all three prongs.
The ABC Test is a worker classification framework used in many US states to decide whether a person is an employee or an independent contractor for purposes such as unemployment insurance, wage and hour law, and workers’ compensation. The test presumes every worker is an employee. To overcome that presumption, the hiring entity must prove three independent conditions, labeled A, B, and C. Failing any single prong means the worker is an employee for purposes of the statute the test applies to.
The clearest modern statutory formulation appears in California Labor Code Section 2775(b)(1), enacted by AB 2257 (leginfo.legislature.ca.gov Labor Code 2775). The same three-prong structure exists in Massachusetts General Laws Chapter 149, Section 148B (malegislature.gov c.149 s.148B).
| Prong | Requirement |
|---|---|
| A | The worker is free from the control and direction of the hiring entity in connection with the performance of the work, both under the contract and in fact. |
| B | The worker performs work that is outside the usual course of the hiring entity’s business. |
| C | The worker is customarily engaged in an independently established trade, occupation, or business of the same nature as the work performed for the hiring entity. |
Prong B is typically the hardest to satisfy. If the hiring entity sells a service and the worker delivers that same service to its customers, the worker’s work is inside the entity’s usual course of business and the engagement fails prong B.
The ABC Test originated decades ago in state unemployment insurance statutes, where many states adopted some version of the three prongs to define “employment” for unemployment compensation purposes. Its modern profile dates to the California Supreme Court’s decision in Dynamex Operations West, Inc. v. Superior Court, 4 Cal.5th 903 (2018). In Dynamex, decided April 30, 2018, the court ruled that workers are presumptively employees for California wage order purposes and adopted the ABC Test as the standard.
The California legislature codified Dynamex through Assembly Bill 5 (AB5), signed September 18, 2019 and effective January 1, 2020, which added Labor Code Section 2750.3. AB 2257 later replaced that section with Labor Code Sections 2775 through 2787.
Massachusetts adopted its statutory ABC test much earlier in G.L. c. 149, Section 148B, which presumes every individual performing services for another is an employee unless the hiring entity proves all three prongs. New Jersey applies an ABC test through its Unemployment Compensation Law, and the state Department of Labor and Workforce Development has codified the analysis in regulation (nj.gov NJDOL ABC rule).
Many states use some version of the ABC Test for unemployment insurance, and a smaller group uses it for wage and hour purposes as well. The list and the precise wording vary by state, and several states use a hybrid where only two of the three prongs apply.
States that apply a three-prong ABC framework for unemployment insurance generally include California, Connecticut, Delaware, Illinois, Indiana, Massachusetts, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, Rhode Island, Tennessee, Utah, Vermont, Washington, and West Virginia, among others. The wage-and-hour application is narrower. California, Massachusetts, New Jersey, and a handful of others apply the full ABC Test for wage-and-hour purposes. Most other states still apply a common-law control test or an economic reality variant for wage claims.
Because the specific statutory wording differs from state to state, companies should check the controlling state statute and case law directly before relying on a generic ABC test description.
The ABC Test is one of three primary US frameworks. The other two are the Common Law Test, used by the IRS for federal income tax, FICA, and FUTA, and the Economic Reality Test, used by the US Department of Labor under the Fair Labor Standards Act. A worker can be a contractor under one test and an employee under another. The strictest of the three for most service businesses is the ABC Test, because of prong B.
For companies engaging contractors across multiple US states, the ABC Test creates real classification risk in any ABC state where the contractor’s work overlaps with the company’s core offering. A software company hiring a remote developer in Massachusetts will rarely satisfy prong B if the developer writes the company’s product code. The same engagement in a non-ABC state may still pass classification under the common-law control test. The cost of getting it wrong includes back wages, overtime, unpaid unemployment contributions, penalties, and in several states treble damages and attorney’s fees.
The practical response is either to confirm all three prongs are satisfied and document them, restructure the engagement to fit a statutory carve-out, or convert the worker to a W-2 employee.
Omnivoo Contract Management lets US companies generate contractor agreements that map the engagement against ABC Test prongs A, B, and C, including the scope of work and the contractor’s independent business attributes. The platform stores classification evidence alongside the contract so the supporting record is in one place if a state agency or court reviews the relationship.
Compliant agreements, IP assignment, and audit-ready records in one place.
AB5 is a California statute, signed September 18, 2019 and effective January 1, 2020, that codified the ABC test for worker classification under the state's wage orders, Labor Code, and Unemployment Insurance Code.
The Common Law Test is the federal worker classification standard the IRS uses for income tax withholding, FICA, and FUTA, evaluating behavioral control, financial control, and the relationship of the parties.
The Economic Reality Test is the worker classification standard the US Department of Labor uses under the Fair Labor Standards Act, examining whether a worker is economically dependent on the hiring entity or in business for themselves.
The IRS 20-Factor Test is the framework set out in Revenue Ruling 87-41 that lists twenty common-law factors the IRS historically used to decide whether a worker is an employee or an independent contractor for federal employment tax purposes.
Worker misclassification is the treatment of a worker as an independent contractor when, under the applicable federal or state test, the worker should be classified as an employee.
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