As your freelance business grows, you may start bringing on help, a subcontractor, a part-time assistant, occasional extra hands for bigger jobs. How you classify that person (independent contractor vs. employee) isn't just paperwork; it determines tax withholding, overtime eligibility, workers' comp coverage, and unemployment insurance obligations, and misclassification penalties can be significant.
Broadly, the more control you exercise over how, when, and where someone does their work, a set schedule, required use of your tools and methods, exclusivity, the more likely they're legally an employee regardless of what you call them on paper. Someone who sets their own hours, uses their own equipment, works for multiple clients, and is paid per project looks more like a genuine contractor.
This distinction comes up constantly in service businesses, nannies, cleaners, and similar household or personal-service workers are especially often misclassified as contractors when the actual working relationship makes them employees under most state rules. When in doubt, a short consultation with an employment attorney or accountant before you bring on your first hire is much cheaper than a misclassification penalty later.