Worker classification is one of the most consequential decisions a small business makes. Classify someone as a 1099 contractor who should have been a W-2 employee, and you face back payroll taxes, penalties, interest, and possible state-level fines that can run six figures. Classify someone as W-2 who is genuinely a contractor, and you pay employer payroll taxes you did not need to pay.
The IRS, the Department of Labor, and most states apply their own (slightly different) tests. This guide covers the most common framework, the trap zones, and how to make the decision defensibly.
The core distinction
A W-2 employee works for the business in an ongoing relationship, on the business's terms, using the business's tools and methods. The business withholds federal and state income tax, FICA (Social Security and Medicare), pays the employer share of FICA, pays federal and state unemployment, often provides benefits, and issues a Form W-2 at year-end.
A 1099 contractor (technically, an independent contractor receiving a Form 1099-NEC) is in business for themselves. They are hired for a specific project or service, control how the work gets done, often work for multiple clients, and use their own tools. The business pays them an agreed amount and issues a Form 1099-NEC at year-end. The contractor pays their own self-employment tax.
The IRS three-factor test
The IRS evaluates three categories of evidence.
Behavioral control
Does the business control how the work is done, or just the result? Specifically: instructions, training, evaluation, and the right to direct.
- Detailed instructions about when, where, and how to work suggest employee.
- Specifying only the result suggests contractor.
- Providing training suggests employee.
- Requiring services be performed personally (no subcontracting allowed) suggests employee.
Financial control
Does the worker have a meaningful financial stake in the work?
- Significant investment in their own tools, equipment, workspace: contractor.
- Possibility of profit or loss based on management decisions: contractor.
- Working for multiple clients (open availability to the market): contractor.
- Hourly or salaried payment with regular schedule: employee.
- Payment by the project with negotiated rates: contractor.
Type of relationship
What is the parties' understanding of the relationship?
- Written contract clearly specifying contractor status helps but is not dispositive.
- Benefits (health insurance, paid leave, retirement plan) suggest employee.
- Ongoing relationship versus project-by-project: ongoing suggests employee.
- The worker performs services that are a key part of the regular business: employee.
The Department of Labor test
The Department of Labor (under the Fair Labor Standards Act) uses a slightly different "economic realities" test for minimum wage and overtime classification. The 2024 DOL rule restored a six-factor totality-of-circumstances test:
- Worker's opportunity for profit or loss.
- Investments by the worker and the employer.
- Permanence of the work relationship.
- Nature and degree of control.
- Whether the work is integral to the employer's business.
- Skill and initiative required.
The DOL test tends to find employee status more easily than the IRS test. A worker who is a contractor for IRS purposes might still be an employee for FLSA purposes (and entitled to overtime).
The state tests
Many states use their own tests, often more strict than the federal ones.
California ABC test (AB-5)
California presumes employee status unless the business proves all three of:
- (A) The worker is free from the control of the hirer.
- (B) The work is outside the usual course of the hirer's business.
- (C) The worker is customarily engaged in an independently established trade.
Test B is the trap: if you are a marketing agency and you hire a freelance marketer, the work is in the usual course of your business, and the worker fails test B. They are likely an employee in California.
Massachusetts ABC test
Similar to California. Strict three-part test. Failing any one factor means employee status.
New York
New York uses a multi-factor test similar to the IRS, but enforcement is aggressive in some industries (gig economy, beauty, construction, trucking).
Other states
Most states use a multi-factor test similar to the IRS or DOL. Some (Washington, New Jersey, others) have unique requirements.
Common misclassifications
"They wanted to be a contractor"
The worker's preference does not control classification. The IRS and DOL look at the facts of the relationship, not the labels. A contract saying "independent contractor" does not make someone a contractor if the facts say employee.
"They have an LLC"
The worker forming an LLC does not automatically make them a contractor. The same analysis applies to the relationship between the LLC's services and your business.
"They work part-time"
Part-time workers can be either employees or contractors. The hours per week is one factor among many.
"We pay by the project"
Payment method is one factor. A worker paid by the project but otherwise under your direction can still be an employee.
"They work from home"
Location is one factor. Many remote employees work from home.
The penalties
Misclassification penalties are severe.
Federal
If a worker is reclassified as an employee, the IRS can assess: unpaid employer FICA, unpaid federal unemployment tax, the employee's share of FICA that should have been withheld, plus penalties (typically 1.5% to 40% of the wages depending on whether the misclassification was unintentional, negligent, or intentional).
State
Unpaid state unemployment tax, state income tax withholding, workers compensation premiums for the period, and state-specific penalties. California penalties can exceed $25,000 per misclassified worker.
FLSA
Unpaid minimum wage and overtime for up to 3 years, double damages, attorneys' fees. Class actions in misclassification cases can run into the millions.
How to do it right
Default to W-2 in close cases
If the analysis is close, classify as an employee. The cost of paying employer payroll taxes is much less than the penalty for getting reclassified.
Use written contracts that match the facts
Have a contract that clearly specifies the contractor relationship, but make sure the actual working relationship matches what the contract says.
Pay through proper channels
W-2 employees through payroll with all withholdings. 1099 contractors through accounts payable with proper records. Form 1099-NEC issued by January 31 for any contractor paid $600 or more in the year.
Get help on edge cases
For workers whose classification is unclear, consult a tax or employment attorney. The cost of getting an opinion is much less than the cost of getting it wrong.
The takeaway
Misclassification is one of the most common, most expensive mistakes small businesses make. The default should be W-2 in any case where the analysis is unclear. Use 1099 only when the worker is genuinely in business for themselves, free of your direction, and working for multiple clients.
Our payroll handles both W-2 employees and 1099 contractors correctly, with proper withholdings, year-end forms, and audit-defensible records. The harder question, who should be which, is one where our Attorney Network can give you a defensible opinion for the edge cases.