The IRS evaluates worker classification based on the actual working relationship, not the label used in a contract. Three broad categories matter: behavioral control (do you direct how, when, and where the work gets done), financial control (who provides tools and bears the financial risk), and the type of relationship (is there a written contract, benefits, or an expectation of ongoing work).
A worker who sets their own hours, uses their own equipment, works for multiple clients, and controls how they complete the work looks like a genuine independent contractor. A worker who follows a set schedule, uses company equipment, receives detailed direction on how to perform tasks, and works exclusively for one business looks like an employee, regardless of what the paperwork says.
A "Contractor" Who Was Really an Employee
Consider a small marketing agency that brings on a "contractor" to handle client social media accounts, paying them as a 1099 worker to avoid the cost and complexity of running payroll. In practice, this person works set hours matching the agency's business hours, uses the agency's own software licenses and equipment, attends daily team meetings, receives detailed direction on exactly how each post should look, and works exclusively for this one agency with no other clients of their own.
When this working relationship ends after two years and the worker later files an unemployment claim, the state agency reviewing the claim examines the actual working relationship, not the 1099 label, and determines the worker had in fact been a misclassified employee the entire time. The agency is assessed back payroll taxes, penalties, and interest for the full two-year period, a bill that, calculated across two years of what should have been employer-side payroll tax contributions, comes to significantly more than what properly running payroll from day one would have cost. The 1099 label never changed what the IRS and state agency actually looked at: the real working relationship.
Misclassification exposure runs in one direction that matters most: businesses that classify workers as 1099 contractors when they should be W-2 employees face back payroll taxes, penalties, and interest if the classification is challenged, whether by the IRS, a state agency, or the worker themselves after the relationship ends.
Certain industries face heightened scrutiny on this issue specifically because misclassification is common there, construction, delivery and gig work, and creative or agency-style businesses among them, which means these industries should be especially deliberate about getting classification right rather than defaulting to whichever option seems simpler administratively.
When a worker's actual role is genuinely ambiguous, it is worth applying the IRS tests deliberately rather than guessing, since the cost of correcting a misclassification after the fact, in back taxes and penalties, is almost always higher than the cost of setting it up correctly from the beginning.
The Voluntary Classification Settlement Program, in Detail
The IRS's Voluntary Classification Settlement Program allows an eligible business to reclassify workers as employees going forward while paying just 10% of the employment tax liability that would have been due on compensation paid in the most recent tax year, with no interest or penalties on that reduced amount, and no audit of prior years for this specific issue. Eligibility requires having consistently treated the workers as contractors, having filed the required 1099s for them, and not currently being under an IRS or Department of Labor audit concerning worker classification.
For a business that suspects it may have long-standing misclassification exposure, this program is often dramatically less expensive than waiting for the issue to be identified during an audit, where full back taxes, penalties, and interest across all open years would typically apply instead.
It's worth revisiting classification decisions periodically, not just at the point of hire. A working relationship that started as a genuinely independent, project-based arrangement can gradually shift toward looking more like employment as the relationship deepens and the business comes to rely on that person more consistently, even without anyone deliberately changing the terms.