Reviewed by Rohan Sasne on May 6, 2026
A common-law employee is a worker whose business has the right to control what will be done and how it will be done, even if the worker has freedom of action. Under the IRS common-law rules the determination weighs three categories of evidence: behavioral control, financial control, and the type of relationship between the parties.
A common-law employee is a worker who, under the IRS common-law rules, is subject to the business’s right to control both what work is done and how it is done. The IRS sets out the standard on its Independent Contractor (Self-Employed) or Employee? page, which states that a worker is an employee “if you can control what will be done and how it will be done.” The phrase common law means the test comes from long-standing agency principles rather than a single statute, and it is the default classification the IRS applies when deciding employment tax treatment.
The defining feature is the right to control, not whether control is used in practice. A business can give a worker freedom of action and still have an employee, because what matters is whether the business retains the right to direct the means and methods of the work. This separates a common-law employee from a contractor, where the payer can direct only the outcome.
The IRS does not use a single deciding factor. It groups the evidence into three categories and weighs the entire relationship. According to the IRS worker classification guidance:
The IRS frames the contractor side of the line in terms of result versus method. On its Independent contractor defined page, the IRS states the general rule that an individual is an independent contractor if the person for whom the services are performed has the right to control or direct only the result of the work and not what will be done and how it will be done. A common-law employee, by contrast, is subject to control over the means and methods. The broader IRS 20 factor test is the historical checklist that fed into these three modern categories. A separate federal standard, the economic reality test, governs Fair Labor Standards Act coverage and uses a different analysis, so a worker can be classified one way for tax purposes and another for wage-and-hour purposes.
Calling a common-law employee an independent contractor is worker misclassification, and it can leave the business liable for employment taxes it failed to withhold, along with penalties. When status is genuinely unclear, the IRS allows either party to file Form SS-8 for an official determination, which the IRS notes “may take at least six months.” Publication 15-A, the Employer’s Supplemental Tax Guide, gives the detailed rules employers use to apply the categories.
Omnivoo Contract Management documents each engagement’s control terms, payment structure, and relationship type, so a business can show how a worker was classified and keep contractor relationships from drifting into common-law employment.
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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.
FICA is the federal payroll tax that funds Social Security and Medicare. On the employee side it is 6.2 percent for Social Security up to the annual wage base plus 1.45 percent for Medicare, for 7.65 percent total, and the employer matches each portion, so the combined rate is 15.3 percent. A 0.9 percent Additional Medicare Tax applies to high earners.
Form W-2, Wage and Tax Statement, is the IRS information return a US employer files and furnishes for each employee to report wages paid and the income, Social Security, and Medicare taxes withheld during the calendar year. It is the employee counterpart to Form 1099-NEC, which reports payments to an independent contractor.
FUTA is the federal unemployment tax imposed on employers under the Federal Unemployment Tax Act. According to IRS Topic 759, the rate is 6.0 percent on the first $7,000 of each employee's wages, and employers who pay state unemployment tax on time generally receive a credit of up to 5.4 percent, for a net federal rate of 0.6 percent. It is reported annually on Form 940.
Self-employment tax is the Social Security and Medicare tax that people who work for themselves pay on their net earnings, at a combined rate of 15.3 percent that splits into 12.4 percent for Social Security up to the annual wage base and 2.9 percent for Medicare with no cap, figured on Schedule SE of Form 1040.
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