W-2 vs. 1099 Workers: How to Classify Correctly

Calling someone a contractor does not make them one. Here is how the IRS looks at worker classification and how to avoid costly mistakes.

By the Staffay team · October 20, 2026

Hiring someone as an independent contractor can look simpler and cheaper than hiring an employee. But if the person is really an employee, misclassifying them can lead to back taxes, penalties, and interest. Here is a plain guide to getting it right.

The basic difference

A W-2 employee works under your direction. You withhold income taxes, pay the employer share of Social Security and Medicare, and pay unemployment taxes. A 1099 contractor runs their own business. They control how the work gets done, pay their own taxes, and receive a Form 1099 from you if you pay them enough in a year.

How the IRS decides

The IRS looks at the whole relationship, grouped into three areas:

Behavioral control. Do you control what the worker does and how they do it, including training, schedules, and methods?
Financial control. Does the worker invest in their own tools, set their own prices, work for other clients, and carry the risk of profit or loss?
Relationship. Is there a written contract, are benefits offered, and is the work ongoing and a key part of your business?

No single factor decides it. The more control you have, the more likely the person is an employee.

Other rules still apply

The U.S. Department of Labor uses its own test for wage and hour law, and states can have their own rules for unemployment and workers’ compensation. A worker can be treated differently under each set of rules, so check them all.

Common mistakes

Treating a full time worker with a set schedule as a contractor
Converting an employee to a contractor while their job stays the same
Skipping a written agreement for true contractors
Forgetting to collect Form W-9 before paying a contractor

What to do if you are unsure

Write down how the work is actually done, not just what the contract says. If the answer is still unclear, talk with a qualified tax professional or employment attorney. The IRS also accepts Form SS-8 to request a formal determination.

How Staffay helps

Our Payroll plan runs payroll for W-2 employees, and our year end W-2 and 1099 processing add-on handles the forms. Our employer solutions team can help you set up clean processes for both types of workers.

This article is general information, not legal or tax advice. See our Disclaimer.

Frequently asked questions

Can a 1099 contractor become a W-2 employee?

Yes. If the relationship changes, or if the person was misclassified, you can move them to payroll. Talk with a tax professional about fixing any past periods.

Do I send a 1099 to every contractor?

Generally you send a Form 1099 to contractors you pay above the IRS reporting threshold during the year. Check current IRS thresholds each year.

Does Staffay process W-2 and 1099 forms?

Yes. Year end W-2 and 1099 processing is available as an add-on to our Payroll plan, from $199.