Contractor Classification Test: IRS vs. DOL vs. State Rules

By Luca Romano. Reviewed by Dana Whitfield, J.D., employment and payroll tax counsel.

This piece covers federal classification standards from the IRS and the U.S. Department of Labor, plus California’s ABC test as the clearest example of how far a state can diverge from federal rules. Employment and tax law vary state by state. Confirm which specific test applies where your workers actually perform their work before relying on anything below.

Why Misclassification Gets Expensive Fast

A company that calls someone a contractor is making a bet. If a court, a state agency, or the IRS later decides that person was really an employee, the bet comes due retroactively, often for years of back pay, benefits, and taxes at once.

The IRS’s framework under Internal Revenue Code Section 3509 sets the baseline cost of getting it wrong without intent to evade. A company with a reasonable basis for treating a worker as a contractor, one that filed the required 1099 forms, owes 1.5% of wages paid in unpaid income tax withholding, plus 20% of the employee’s share of FICA taxes that should have come out of each paycheck. Skip the 1099 filing and those rates climb to 3% and 40%. Willful misclassification removes the discount entirely. The employer then owes 100% of both the withholding and the FICA liability, and the trust fund recovery penalty can reach the individual who signed off on the arrangement.

Late or missing 1099-NEC forms add their own cost. The standard penalty for filing late runs from $60 to $310 per form depending on how late it is. Intentional disregard raises that to $630 per form or 10% of the amount that should have been reported, whichever is larger.

There is a way to soften this. The IRS’s Voluntary Classification Settlement Program lets an employer that wants to reclassify workers going forward pay just 10% of the employment tax liability calculated under Section 3509 rates for the most recent tax year, with no interest and no penalty on that reduced amount. It is a one-time offer, and it only works before an audit starts.

State exposure runs on a separate track entirely. California’s Labor Code Section 226.8 fines willful misclassification at $5,000 to $15,000 per violation, rising to $10,000 to $25,000 per violation for a pattern or practice of misclassifying workers. Those numbers stack on top of the federal bill. They don’t replace it.

The IRS Common-Law Test: Three Buckets, No Scorecard

The IRS doesn’t run a checklist with a pass-fail number at the bottom. Its common-law test, described in guidance tied to Publication 1779 and the agency’s worker-classification materials, sorts evidence into three buckets and asks which one weighs heavier.

Behavioral control asks whether the business directs, or has the right to direct, what the worker does and how they do it. Training sessions, required hours, detailed instructions on method rather than just outcome, and company-provided tools all push toward employee status. A contractor who sets her own schedule, uses her own equipment, and figures out her own method looks more independent.

Financial control looks at who bears the economic risk. Does the worker have a real investment in the equipment or facilities used for the job? Can they take a loss on a project? Do they advertise their services to other clients, or work for one company exclusively? A worker who bills hourly with no unreimbursed expenses and no other clients reads differently than one running an actual small business.

Relationship of the parties covers the paperwork and the practical expectations. Written contracts matter, but the IRS discounts a contract that says “independent contractor” if the day-to-day relationship looks like employment anyway. Employee-type benefits, health insurance, paid vacation, a retirement match, are a strong signal. So is permanence: a relationship expected to continue indefinitely looks more like employment than a defined project with an end date.

Two features of this framework catch employers off guard. No factor is dispositive on its own, and the IRS explicitly declines to assign any of them fixed weight. And the agency’s own audit tool, Form SS-8, exists precisely because outcomes are unpredictable enough that a worker or a business can file one and ask the IRS to rule on a specific case. The agency itself warns that a determination can take six months or longer to come back.

Section 530 of the Revenue Act of 1978 offers a narrow escape hatch. If a business has consistently treated a class of workers as contractors, filed 1099s consistently, and had a reasonable basis for the position (industry practice, prior audit results, or legal advice), it may keep contractor treatment for federal tax purposes even where the underlying facts are ambiguous. That relief covers federal employment tax only. It does nothing for state wage-and-hour law or benefits eligibility.

The DOL’s Economic-Reality Test: Six Factors, No Front-Runner

The Fair Labor Standards Act asks a different question: is this worker economically dependent on the business for work, or genuinely in business for themselves? The Department of Labor’s answer, finalized in a rule published January 10, 2024 and effective March 11, 2024, runs on six factors under a “totality of the circumstances” standard.

• Opportunity for profit or loss based on managerial skill — can the worker increase earnings through their own decisions, like hiring help or negotiating rates?
• Investments by the worker and the employer — has the worker put capital into equipment or a business, not just labor?
• Degree of permanence of the relationship — is the work indefinite and continuous, or project-based with a natural end?
• Nature and degree of control — over schedule, price, and method, including whether the company sets and enforces the terms.
• Extent to which the work is integral to the business — is this function central to what the company sells, or ancillary support?
• Skill and initiative — does the worker apply specialized skill in a way that reflects independent business judgment, not just following instructions?

The 2024 rule replaced a narrower 2021 rule that had elevated control and opportunity for profit or loss to “core factors” capable of deciding a case almost by themselves. The Department deliberately walked that back. Under the current rule, no factor gets predetermined weight, and additional circumstances can matter if they speak to economic dependence.

This is where a practitioner’s read matters more than the bare text. Employment counsel have generally described the 2024 rule as closer to how courts already analyzed FLSA cases before 2021, which in practice makes it less contractor-friendly than its predecessor, even though the Department frames it as a return to precedent rather than a policy shift. My own read: a company that restructured contractor agreements specifically to fit the 2021 “core factors” framework may find those same agreements assessed quite differently under the current standard.

One limit is worth flagging. This test only governs FLSA coverage: minimum wage, overtime, and related wage-and-hour protections. A worker can fail the economic-reality test and count as an employee for overtime purposes while still filing a 1099 if the IRS’s separate common-law analysis comes out the other way. Neither agency automatically defers to the other’s conclusion.

California’s ABC Test: A Presumption, Not a Balancing Act

California takes a fundamentally different approach. Since the state Supreme Court’s 2018 decision in Dynamex Operations West, Inc. v. Superior Court, and its codification through Assembly Bill 5 effective January 1, 2020, California starts from a presumption that a worker is an employee. The burden sits on the hiring business to prove otherwise, and it has to clear three conditions at once.

Part A: the worker is free from the control and direction of the hiring entity in performing the work, both under the contract and in actual practice.

Part B: the worker performs work that falls outside the usual course of the hiring entity’s business.

Part C: the worker is customarily engaged in an independently established trade, occupation, or business of the same nature as the work performed.

Part B is where most companies lose. A marketing agency hiring a freelance graphic designer for a one-off project sits on reasonably solid ground, since the engagement is bounded even though design work sits close to the agency’s core business. A software company that classifies its customer-support staff as contractors has a much harder argument, because customer support isn’t incidental to running a software business. It is part of running one.

Before Dynamex, California used the multi-factor Borello test, drawn from the 1989 case S.G. Borello & Sons, Inc. v. Department of Industrial Relations. Borello weighed roughly a dozen factors with control as the primary one, but no single factor controlled the outcome by itself. AB5 didn’t eliminate Borello; it narrowed where Borello still applies. Certain professions and business relationships carved out by AB5 and its later amendment, AB 2257, still get evaluated under Borello’s flexible, multi-factor approach instead of the strict ABC test. Freelance writers under specific conditions, licensed professionals like doctors and architects, and referral agencies fall into that carved-out group.

The practical effect: California is stricter than the federal tests on paper, and stricter still in practice, because failing any one of the three ABC prongs ends the analysis. The IRS and DOL tests are holistic; a company can lose on control but still argue its way to contractor status through other factors. California doesn’t allow that kind of trade-off. In my assessment, Part B causes more surprise liability for companies expanding into California than either federal test does on its own, precisely because it has no flexibility built in.

How the Same Worker Can Get Three Different Answers

Consider a delivery-app driver who sets her own hours, uses her own car, and drives for more than one platform. Under the IRS’s common-law test, that fact pattern leans contractor: she controls her method, bears her own vehicle costs, and works for multiple payers.

Under the DOL’s economic-reality test, the answer gets murkier. Delivery is arguably integral to a delivery platform’s business, not incidental to it, which cuts toward employee status on that one factor even if permanence and investment point the other way. The 2024 rule’s insistence on weighing all six factors without a front-runner means her status depends on how a court balances “integral to the business” against her multi-app flexibility, and reasonable analysts land in different places on that question.

Under California’s ABC test, the same driver likely fails Part B outright. Delivering for a delivery company is not outside the delivery company’s usual course of business; it is the business. Unless she qualifies for one of AB5’s specific carve-outs, she is presumed an employee in California regardless of how independently she otherwise operates.

Three tests, one driver, three different starting points. None of the agencies has to defer to the others’ conclusions. A business operating in California, with federal tax filings and FLSA wage obligations on top, has to satisfy all three simultaneously. Passing the IRS test does not immunize a company from a DOL wage claim, and it does not immunize it from a California Labor Commissioner audit either.

Side-by-Side: The Three Tests Compared

The table below lines up jurisdiction, legal basis, and the core question each test is actually trying to answer.

What Getting It Wrong Costs: IRS Section 3509 Rates

The chart below shows the escalating federal cost structure for unintentional misclassification, using the rates set out in IRC Section 3509. Rates roughly double when a business skips filing 1099s, and the discount disappears entirely for willful misclassification.

Worked Example: One Worker, Two Outcomes

Take a single fact pattern and run it through two tests to see where they split.

The facts: A logistics company hires “Aiden” as a delivery coordinator. Aiden works from home, uses his own laptop, and can decline shifts. The company sets his rate per completed batch, requires him to use its dispatch software, and has used him nearly full-time for the past fourteen months. He does not work for any other logistics company. His role, assigning drivers to delivery routes, is the company’s core operation.

Under the IRS common-law test: Behavioral control leans employee, since the company dictates the software and the process. Financial control is mixed; he owns his laptop but has no other clients and bears little financial risk. Relationship of the parties leans employee given the fourteen-month, near-exclusive arrangement. Most practitioners would call this an employee, though a company with a carefully drafted contract and no benefits could still argue the point.

Under California’s ABC test: Part A fails immediately, since the dispatch-software requirement is direction and control in practice, not just on paper. Part B fails too, since coordinating deliveries is the company’s usual course of business rather than incidental to it. Because ABC requires all three prongs to hold, failing on A and B ends the analysis there. Aiden is presumptively an employee in California, without needing to reach Part C at all.

Both tests point the same direction here, which is common. Most workers who look like employees under one test look like employees under most tests. The split cases that create real exposure are the close ones: the worker with some genuine independence who clears the IRS bar but trips on California’s stricter Part B, or the contractor who satisfies Part B by working outside the company’s core business but still fails DOL’s control factor because of how tightly a specific engagement happens to be managed.

Where Companies Get Classification Wrong

A few patterns show up again and again in misclassification audits and litigation.

Copying a contract template without matching practice to paper. A contract that says “independent contractor, no set hours, use your own equipment” means little if the actual working relationship looks like a nine-to-five job with company-issued laptops. Every test discussed here looks past the label toward the facts on the ground.

Assuming one test’s outcome carries over to the others. Passing an IRS Form SS-8 determination, or simply not having a tax problem, does not resolve FLSA exposure or a California wage claim. Each agency runs its own analysis under its own statute.

Treating part-time or project-based work as automatically safe. Neither the IRS test nor the DOL test treats hours worked as decisive. A worker who logs fifteen hours a week can still fail every factor that matters if the company controls how those fifteen hours get spent.

Ignoring state-specific carve-outs and assuming AB5 applies uniformly. AB 2257 added meaningful exceptions to AB5 for specific professions and business-to-business relationships. A company outside those carve-outs gets the strict ABC test. A company inside one of them gets evaluated under the older, more flexible Borello factors instead. Missing that distinction leads to over-classifying some workers as employees when a safer route existed, or under-classifying others when it didn’t.

One more point worth stating plainly: the 2024 DOL rule is not, in my judgment, dramatically different from how many courts already analyzed FLSA cases in the years before the 2021 rule existed. Treating it as a brand-new standard, rather than a return to a familiar one, has led some companies to over-invest in restructuring contractor relationships that were already on shaky ground for entirely different reasons.

Companies operating across many states, or hiring internationally, sometimes sidestep this analysis by routing a role through an employer of record structure instead of classifying the person as a contractor at all. That approach carries its own tax and risk trade-offs, covered separately, but it removes the classification question for that specific worker because the EOR, not the client company, becomes the legal employer of record.

Self-Assessment: Questions to Run Before You Classify Anyone

None of these questions decide a classification by themselves. Together, they surface the fact pattern an auditor or a plaintiff’s attorney would look at first.

• Does the worker set their own hours and methods, or does the company dictate both?
• Does the worker use their own equipment and cover their own business expenses?
• Does the worker have other clients, or is this company their only source of this kind of income?
• Is the work central to what the company sells, or is it support work incidental to the core business?
• Is there a defined end date or deliverable, or is the arrangement open-ended and ongoing?
• Does the worker receive anything resembling an employee benefit: paid time off, an equipment stipend, an internal company email address used day to day?
• If the company operates in California or another ABC-test state, does the worker’s role fall inside or outside the company’s usual course of business?
• Has the company checked whether a state-specific carve-out, like an AB5 professional exemption, applies before defaulting to the strict test?

A company that answers “the company controls this” to more than two or three of the first six questions should treat employee status as the safer working conclusion, in any jurisdiction, until counsel reviews the specific facts.

Key Takeaways

Frequently Asked Questions

Which classification test actually applies to my company?

All of the ones tied to laws that cover your workers. If you pay U.S. workers, the IRS common-law test applies to your federal payroll tax obligations. If those workers are covered by the FLSA, the DOL’s economic-reality test applies to wage-and-hour exposure. If you have workers in California, the ABC test applies on top of both federal tests. They run independently, not as alternatives to pick from.

Can a worker be an employee under one test and a contractor under another?

Yes, and it happens often enough that employment counsel treat it as the normal case rather than the exception. A worker can clear the IRS’s holistic test while failing California’s ABC test outright, because the ABC test doesn’t allow the same kind of factor trade-off.

Does a signed independent contractor agreement protect a company from misclassification claims?

Not by itself. Every test discussed here weighs the actual working relationship over the language in a contract. A contract can support a classification decision that is already correct on the facts. It cannot rescue one that isn’t.

What is the Voluntary Classification Settlement Program, and who qualifies?

It’s an IRS program that lets an employer reclassify workers as employees going forward in exchange for paying about 10% of the employment tax liability calculated under Section 3509 rates for the most recent year, without interest or penalty on that amount. It’s only available to businesses that haven’t already been notified of a worker-classification audit by the IRS, the DOL, or a state agency.

Does the 2024 DOL rule apply retroactively to existing contractor relationships?

The rule took effect March 11, 2024, and governs how the Department and courts analyze FLSA status going forward, including for ongoing relationships that started earlier. It does not create new liability for periods before its effective date, but a relationship that started under the 2021 rule’s framework is now assessed under the 2024 standard for any current or future wage claim.

Are there other states with an ABC test besides California?

Yes. Massachusetts, New Jersey, and a handful of other states use some version of an ABC test for unemployment insurance or wage law purposes, though the exact wording and carve-outs differ from California’s. Confirm your specific state’s test rather than assuming California’s version applies elsewhere.

References

• Internal Revenue Service, “Independent Contractor (Self-Employed) or Employee?” irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employee
• U.S. Department of Labor, “Employee or Independent Contractor Classification Under the Fair Labor Standards Act,” 89 Fed. Reg. 1638 (Jan. 10, 2024), effective March 11, 2024.
• California Labor Code Section 226.8 (willful misclassification penalties); California Assembly Bill 5 (2019), effective January 1, 2020; Assembly Bill 2257 (2020) amendments and carve-outs.
• Dynamex Operations West, Inc. v. Superior Court, 4 Cal. 5th 903 (2018).
• S.G. Borello & Sons, Inc. v. Department of Industrial Relations, 48 Cal. 3d 341 (1989).
• Internal Revenue Code Section 3509; IRS Voluntary Classification Settlement Program guidance.

A tape measure and a laser level can both be pointed at the same wall and produce two correct but different readings, because they’re measuring different things. The IRS, the DOL, and California aren’t disagreeing about the facts of a worker’s job. They’re asking different questions about the same set of facts, for different reasons, under different laws. The rulers don’t change. What changes is which one gets handed to you, and by which agency, on which day.