The core difference is control. Employees work under your direction. You decide when they work, where they work, and how they do the job. Contractors control their own methods. You agree on the end result, but they determine how to get there.

This distinction drives your tax obligations. With employees, you withhold federal and state income taxes from their paychecks. You withhold Social Security and Medicare, then pay a matching amount from your own pocket. You file quarterly payroll returns, pay state unemployment taxes, and issue W-2s at year end. Arizona also requires workers’ compensation coverage for employees.

With contractors, you don’t withhold anything. You pay the agreed amount in full and issue a 1099-NEC if you paid them $600 or more during the year. They handle their own income taxes and self-employment taxes. No quarterly payroll filings on your end, no employer tax contributions, no workers’ comp requirements for their work.

The IRS uses three categories to determine classification. Behavioral control looks at whether you direct what the worker does, when they do it, and how. Financial control considers who provides equipment, whether the worker can profit or lose money on the job, and whether they offer services to other clients. Type of relationship examines contracts, benefits, and how central the work is to your business.

No single factor decides the classification. Someone might use your office but still be a legitimate contractor if they set their own hours, work for other clients, and control their methods. But if you dictate their schedule, give step-by-step instructions, provide all their tools, and they work exclusively for you, calling them a contractor doesn’t make it true.

The cost difference between employees and contractors is real but often overstated. You avoid payroll taxes and benefits with contractors, but contractors typically charge higher rates to cover their own taxes and overhead. The classification should reflect the actual working relationship, not a strategy to reduce costs. Our Phoenix area bookkeeping services regularly help business owners understand these distinctions and set up proper tracking for both worker types.

Misclassification creates problems. The IRS can assess back taxes, penalties, and interest for employees you incorrectly treated as contractors. Arizona follows federal guidelines and will also pursue unpaid unemployment taxes. Beyond tax issues, misclassified workers can file unemployment claims or workers’ comp claims that create unexpected liability.

If you have employees, you need payroll systems that handle withholdings, filings, and compliance correctly. If you have contractors, you still need to track payments and issue 1099s accurately. When you’re unsure about classification, err toward employee status. The cost of treating a contractor as an employee is minimal. The cost of treating an employee as a contractor can be substantial.