The ABC test is a worker classification standard used by several U.S. states to determine whether someone should be classified as an independent contractor or an employee. It gets its name from the three conditions (A, B, and C) that a hiring company must satisfy to legally classify a worker as an independent contractor.
- Freedom from control
- Outside the usual course of business
- Independently established business
Unlike other classification tests, the ABC test presumes employment by default. That means if you can't satisfy all three conditions, the worker is an employee under the law.
Not probably an employee. An employee.
There's no partial credit, sliding scale of factors, or room to argue that you got close enough on two out of three.
California made it famous with AB5, signed in 2019 and effective January 1, 2020, but the ABC test predates AB5 and is now used in some form across dozens of states. If you're engaging independent contractors in any of them, this test governs how that relationship is classified (regardless of what your contract says).
Key Takeaways
- The ABC test presumes a worker is an employee unless the hiring company proves all three conditions are met. Fail any one of them, and the worker is legally an employee.
- California's AB5 is the most well-known version of the ABC test, but Massachusetts, New Jersey, Vermont, and other states use variations of it too.
- The three parts cover control over the work, whether the work falls outside the company's usual business, and whether the worker has an independently established business.
- The ABC test is stricter than the IRS Common Law Test. A worker who passes the IRS test might still be classified as an employee under the ABC test in certain states.
What Is the ABC Test for Independent Contractors?
The ABC test is a three-part legal standard used to determine whether a worker should be classified as an independent contractor or an employee. To classify someone as a contractor, a company must satisfy all three conditions.
The ABC test presumes employment by default. The burden is on the company to prove independent contractor status. It's not on the worker to prove they're an employee. That's why organizations that pass the IRS classification test can still find themselves on the wrong side of the ABC test in states that use it.
The 3 Prongs of the ABC Test
Every state that uses the ABC test has its own version, and the exact language changes. Still, the structure is consistent: three requirements, all of which must be met for the worker to be classified as an independent contractor.
Prong A: Freedom from Control
The worker must be free from the company's control and direction in performing the work (both under the contract and in actual practice).
This is the prong most companies think they're satisfying, and the one that catches them most often. The language in your contract doesn't define the relationship. Regulators look at the actual working conditions:
- Setting daily schedules
- Requiring use of company equipment
- Dictating specific methods used to complete the work
- Managing the contractor like a team member in all but name
Do any of those, and you're technically failing this one.
You can tell a contractor what you need delivered and when, but directing how they do it is where the line starts to blur.
Prong B: Outside the Usual Course of Business
The work performed by the contractor must fall outside the hiring company's usual course of business.
This is the condition AB5 made notorious, and it's the one that creates the most friction for companies in certain industries. A media company that hires a freelance writer to produce articles for its publication is doing something that looks, to a regulator, a lot like its core business. A software company that hires a developer to build features for its product faces the same question.
Important distinction: the strict 'outside the usual course of business' standard applies specifically in California and Massachusetts. In most other ABC test states, Prong B can also be satisfied if the work is performed outside the company's usual place of business — meaning a contractor who works offsite clears this prong regardless of whether the work resembles the company's core business. That's a materially different compliance calculus.
The intent of this prong is to distinguish genuine independent contracting (a law firm hiring a plumber to fix a leaky pipe) from companies using contractor classification to avoid employment obligations for their core workforce.
In practice, it catches a lot of arrangements that weren't designed to be evasive at all.
California has carved out exemptions for certain professions under AB5 and its follow-on legislation (AB2257 and AB1514, the latter effective January 2026). Specific occupations can qualify for exemption from Prong B under defined conditions. They're narrow, and the conditions matter.
Prong C: Independently Established Business
The contractor must be customarily engaged in an independently established trade, occupation, or business of the same nature as the work being performed.
The contractor needs to be running an independent business instead of working exclusively for you under a contractor label. This typically means they:
- Work for multiple clients
- Hold themselves out to the market as a business
- Have their own tools and infrastructure
- Would continue operating as a business if your engagement ended
A contractor who works exclusively for one company, has no other clients, and whose entire livelihood depends on that one relationship has a problem on this requirement. An LLC or sole proprietorship doesn't automatically satisfy this prong because it's more about the substance of how the person operates.
Which States Use the ABC Test?
California gets most of the attention, but the ABC test is used across the majority of U.S. states (in some form). The full version applies in more than two dozen states. Others use a modified version requiring only Prongs A and C, or offer flexibility between A&B or A&C. The remaining states rely on the Common Law test instead.
| State | Classification Test |
|---|---|
| California | ABC Test |
| Alaska | ABC Test |
| Arkansas | ABC Test |
| Connecticut | ABC Test |
| Delaware | ABC Test |
| Georgia | ABC Test |
| Hawaii | ABC Test |
| Illinois | ABC Test |
| Indiana | ABC Test |
| Kansas | ABC Test |
| Louisiana | ABC Test |
| Maine | ABC Test |
| Maryland | ABC Test |
| Massachusetts | ABC Test |
| Nebraska | ABC Test |
| Nevada | ABC Test |
| New Hampshire | ABC Test |
| New Jersey | ABC Test |
| New Mexico | ABC Test |
| Ohio | ABC Test |
| Oregon | ABC Test |
| Puerto Rico | ABC Test |
| Rhode Island | ABC Test |
| Tennessee | ABC Test |
| Utah | ABC Test |
| Vermont | ABC Test |
| Washington | ABC Test |
| West Virginia | ABC Test |
| Colorado | A&C of ABC Test |
| Idaho | A&C of ABC Test |
| Montana | A&C of ABC Test |
| Pennsylvania | A&C of ABC Test |
| Wisconsin | A&C of ABC Test |
| Wyoming | A&C of ABC Test |
| Oklahoma | A&B or A&C of ABC Test |
| Virginia | A&B or A&C of ABC Test |
| Alabama | Common Law |
| Arizona | Common Law |
| District of Columbia | Common Law |
| Florida | Common Law |
| Iowa | Common Law |
| Kentucky | Common Law |
| Michigan | Common Law |
| Minnesota | Common Law |
| Mississippi | Common Law |
| Missouri | Common Law |
| New York | Multi-Framework* |
| North Carolina | Common Law |
| North Dakota | Common Law |
| South Carolina | Common Law |
| South Dakota | Common Law |
| Texas | Common Law |
Note: California and Massachusetts apply a stricter Prong B standard than other ABC test states. All other states listed above allow Prong B to be satisfied if the work is performed outside the company's usual place of business — an alternative that doesn't exist under AB5 or Massachusetts law.
*New York applies separate tests depending on regulatory context — unemployment insurance, wage claims, and workers' compensation each follow different frameworks. It is one of the most complex state classification environments in the country.
States apply their version of the test in different contexts, too. Some use it only for unemployment insurance determinations, others apply it across wage claims, workers' compensation, and tax matters.
The table is a starting point but not a substitute for jurisdiction-specific legal review.
ABC Test vs. Other Classification Frameworks
The ABC test is just one classification framework. Different states and countries use other frameworks to determine the difference between independent contractors and full-time employees. While the list below isn't comprehensive, it at least gives you a general understanding of how these things can differ:
| Framework | Who Uses It | Default Presumption | Key Focus |
|---|---|---|---|
| ABC Test | Multiple U.S. states | Employee (unless all three prongs met) | Control, core business, independent enterprise |
| IRS Common Law Test | U.S. federal (tax) | Neither; weighs factors across three categories | Behavioral control, financial control, relationship type |
| Economic Reality Test | U.S. federal (DOL/FLSA) | Neither; weighs multiple factors | Economic dependence on the employer |
| Borello Test | California (some exempted roles) | Neither; multi-factor balancing | Right to control manner and means of work |
| IR35 | United Kingdom | Neither; fact-specific | Whether worker would be employee if engaged directly |
The biggest difference between the ABC test and most other frameworks is the presumption. The IRS Common Law Test and the Economic Reality Test both weigh multiple factors without a default. The ABC test starts from a position of employment and puts the burden on the company to prove otherwise.
What the ABC Test Means If You're Managing Independent Contractors
If you're engaging contractors in ABC test states, a few things should be true about how you operate.
- Classification needs to happen before the engagement starts. The ABC test applies at the point of classification, and retroactive fixes are painful. Back taxes, penalties, and potential benefits obligations don't disappear because you updated the contract later.
- If a contractor is doing work that's central to your product or business, you need to know whether any exemptions apply and whether your engagement is structured in a way that holds up under scrutiny.
- Don't rely on the contract alone. Regulators look at the working relationship. An agreement that says independent contractor doesn't make it so if the day-to-day reality looks like employment. How work is assigned, managed, and reviewed matters more than what the contract says.
If you're operating across multiple states, you're dealing with multiple frameworks simultaneously. A contractor properly classified under federal IRS guidelines might still be an employee under California's AB5 or Massachusetts' stricter standard. Your classification process needs to apply the right test for the right jurisdiction (and document the reasoning).
How Worksuite Handles ABC Test Classification
Worksuite's classification engine applies the relevant federal and state-level tests (including ABC test variants) based on each worker's jurisdiction. Classification decisions are documented with the applicable legal tests applied.
Classification decisions run through the Worksuite platform are backed by misclassification indemnification — covering actual monetary losses that result from errors in Worksuite's classification recommendations. Coverage requires engagements to run through the platform with all standard workflows intact. Terms and exclusions apply. Contractors who don't pass the applicable test don't get waved through. Flagged cases escalate to human compliance experts who work with your Legal and GC teams directly.
If you're managing independent contractors across multiple states and want to know whether your current classification process would hold up, book a live demo and find out.
