Independent Contractor vs. Employee: How the IRS Makes the Determination

construction workers

Hiring someone as an independent contractor instead of an employee has real tax consequences — for both you and the worker. When the classification is wrong, the IRS can reclassify the relationship and assess back employment taxes, penalties, and interest. Worker misclassification is one of the IRS’s top enforcement priorities because it directly affects employment tax revenue.

Why the Classification Matters

If someone is an employee, you’re required to withhold income tax, withhold and pay Social Security and Medicare taxes, pay unemployment tax, and file W-2s. If they’re an independent contractor, you don’t withhold anything — you issue a 1099-NEC if you pay them $600 or more. The tax savings from treating someone as a contractor are significant, which is exactly why the IRS scrutinizes these classifications.

How the IRS Evaluates the Relationship

The IRS uses a common-law test that looks at three categories of evidence: behavioral control, financial control, and the type of relationship. No single factor is determinative — the IRS weighs the totality of the relationship.

Behavioral control asks: does the business control how the work is done? If you dictate when, where, and how someone performs their tasks, provide training on your methods, or require them to follow specific processes, that points toward employee status. If the worker controls their own methods and schedule, that points toward contractor.

Financial control asks: does the worker have a significant investment in their own equipment? Do they have unreimbursed expenses? Are they available to work for other clients? Are they paid per project or per hour? Workers who invest in their own tools, market their services to multiple clients, and bear the risk of profit or loss look more like contractors.

Type of relationship asks: is there a written contract? Does the worker receive benefits? Is the relationship expected to be ongoing or project-based? Benefits, permanence, and integration into core business operations all point toward employee status.

The Penalties for Getting It Wrong

If the IRS reclassifies your contractors as employees, you owe the employer’s share of FICA taxes you should have withheld and paid, plus penalties for failure to withhold, failure to file correct information returns, and interest. In some cases, you may also owe the employee’s share of FICA if you can’t collect it from the worker. These assessments can go back multiple years.

How to Protect Yourself

Have a written contract with every contractor that specifies the scope of work, payment terms, and the independent nature of the relationship. Collect a W-9 before making any payments. Don’t provide training on how to do the work. Don’t set their schedule. Don’t provide their tools or equipment. And don’t treat them like employees in practice while calling them contractors on paper.

If you’re unsure about a specific relationship, the IRS offers Form SS-8 to request a formal determination. But be aware that filing SS-8 invites IRS scrutiny of the relationship, so it’s worth getting professional guidance before taking that step.

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If you hire contractors and want to make sure your classification holds up, schedule a consultation or take a look at our advisory services.