Misclassifying workers is one of the most expensive mistakes a contractor can make. The penalties are real, the audit trail is harsh, and ‘it’s industry standard’ is not a defense. Here’s the IRS framework, plainly.
Worker classification is not a choice. It’s a legal determination based on the actual relationship between the contractor and the worker. The IRS, the Department of Labor, and most state agencies use a similar framework — and contractors get classified wrong more often than just about any other industry.
A W-2 employee is a worker on your payroll. You withhold federal income tax, Social Security, and Medicare. You pay the employer half of FICA. You may also pay unemployment insurance. You carry workers’ comp coverage. At year-end you issue them a W-2.
A 1099 independent contractor is someone in business for themselves you’ve hired for a specific job. You don’t withhold anything. They bear FICA on both ends. At year-end you issue them a 1099-NEC if you paid them more than $600.
The IRS organizes the analysis into three categories:
If you tell the worker when to start and stop, where to work, what tools to use, what sequence to do tasks in, who else to work with, and how to do the actual work — you have behavioral control. That points strongly toward employee status.
Independent-contractor indicators: significant investment in their own equipment, unreimbursed business expenses, paid by the job not by the hour, available to perform services for the public not just you, can realize profit or loss based on their own efficiency.
Employee indicators: ongoing indefinite work arrangement, work is a key part of your business, you provide benefits, no written contract limiting scope.
If the IRS reclassifies workers from 1099 to W-2: back payroll taxes (both halves of FICA), federal income tax withholding, federal unemployment tax, penalties, interest, state-level back taxes. For a contractor with even one misclassified worker over multiple years, the bill can easily exceed $50,000–$100,000.
Contractors often say “everyone does it this way.” The IRS doesn’t care. Industry practice is not a legal defense.
Section 530 of the Revenue Act of 1978. If you’ve consistently treated a worker as 1099, had a reasonable basis, and met reporting requirements (filed all 1099s, treated similar workers consistently), the IRS may grant relief from reclassification.
California, New Jersey, Massachusetts use a stricter “ABC test.” A worker is presumed an employee unless: (A) free from contractor’s control, (B) work is outside the usual course of the hiring entity’s business, (C) worker is engaged in an independently established trade. The B prong is brutal for contractors — if you’re a GC and hire someone to do construction work, you fail B.
For every 1099 subcontractor: get a W-9 before issuing the first payment, get a signed written agreement, verify business insurance, pay by the job not by the hour, issue 1099-NEC by January 31.
For W-2 employees: set up payroll before hiring, collect W-4 and I-9, carry workers’ comp, run regular payroll with proper withholding, file quarterly 941s.
Foad is a federally licensed Enrolled Agent who writes about tax and bookkeeping for small businesses.