Date Published:
Author: Joe
The difference between a 1099 contractor and a W-2 employee comes down to control, not paperwork. If you control how, when, and where the work gets done, that person is almost always an employee who should be on a W-2. If they run their own business, set their own hours, and work for other clients too, they are more likely a contractor you pay on a 1099. Handing someone a 1099 does not make them a contractor. The actual working relationship decides it, and getting it wrong is one of the more expensive mistakes a small business can make.
This is general information, not legal or tax advice. Worker classification depends on your specific situation, and Washington agencies apply their own tests on top of the federal rules. Confirm your classifications with the agencies or your CPA before you rely on them. At Plumb Financial we help service businesses and contractors across Edmonds and Snohomish County keep this clean from the start, so it never turns into a surprise.
W-2 employee. You direct the work. You withhold income tax, Social Security, and Medicare from their pay, you pay the employer share of payroll taxes, and in Washington you cover them for workers' compensation and unemployment. They get a W-2 at year end.
1099 contractor. They run their own business and control how the work gets done. You do not withhold taxes. They handle their own taxes and their own insurance. If you pay them $600 or more in a year, you issue a 1099-NEC.
The label is not a choice you make for convenience. It follows the facts of the relationship.
The core difference is who controls the work and who carries the tax and insurance burden. With a W-2 employee, the business is in charge and takes on the responsibilities: withholding, payroll taxes, workers' comp, and unemployment. With a 1099 contractor, the worker is in charge of their own business and carries their own taxes and coverage.
That difference matters because misclassifying an employee as a contractor shifts costs the business is legally supposed to carry onto a worker who cannot absorb them, which is exactly why the IRS and state agencies watch it closely.
The IRS looks at the real relationship across three areas, not at what a contract says. If most of the answers point to your control, the person is an employee.
Behavioral control. Do you decide when they work, where they work, and how they do the job? Do you provide training and detailed instructions? That points to employee.
Financial control. Do you provide the tools, equipment, and materials? Do you pay by the hour rather than by the project? Can they realize a profit or loss on the work? A worker who supplies their own tools, sets their own price, and can lose money is behaving like a contractor.
Type of relationship. Is the arrangement ongoing and central to your business, or is it a defined project? Do they work only for you, or do they serve other clients too? Someone who works only for you, indefinitely, doing core work looks like an employee.
No single answer decides it. You weigh the whole picture. In our experience, the honest test for a lot of small businesses is simple: if you would be upset that a helper left in the middle of the day to go work for someone else, you are probably treating them like an employee.
Yes. Washington applies its own tests on top of the federal ones, and the construction trades face the strictest version. The Washington Department of Labor and Industries uses a multi-part test to decide whether someone is a covered worker for workers' compensation, and the Employment Security Department applies its own test for unemployment. A worker can be treated as a contractor for one purpose and an employee for another, which trips up a lot of owners.
For construction specifically, calling someone an independent contractor generally means they need to look like a real, separate business. That usually includes being a registered contractor with their own UBI number, carrying their own insurance, maintaining a separate set of books, and being free to take other jobs. A helper you found last month who shows up in your truck with your tools almost never meets that bar, no matter what the invoice says.
Because Washington treats this so seriously, this is one of the areas where a quick check with L&I, the Employment Security Department, or your CPA is worth the few minutes it takes.
Misclassifying an employee as a 1099 contractor can leave you owing back taxes, back premiums, penalties, and interest, sometimes going back years. When an agency reclassifies a worker, the business is typically on the hook for the payroll taxes that should have been withheld and paid, the workers' compensation premiums that were never paid to L&I, and the unemployment taxes owed to the state. Depending on the situation, there can also be back wages, overtime, and penalties on top.
Here is a real pattern we see. A Snohomish County contractor pays a helper as a 1099 for a couple of seasons because it is simpler. The helper gets hurt on a job, files a claim, and L&I opens a review. Now the contractor is explaining why a full-time helper was never covered, and the bill for back premiums and penalties dwarfs whatever payroll processing would have cost. The simple path turned out to be the expensive one.
No. A signed contractor agreement does not override the facts of how the work actually happens. Agencies look at the real relationship: who controls the work, who supplies the tools, whether the worker runs an independent business. If the day to day looks like employment, the worker is an employee regardless of what the paperwork calls them. A contract can support a genuine contractor relationship, but it cannot manufacture one.
The forms follow the classification, and keeping them straight is a big part of staying clean.
For a 1099 contractor: collect a completed W-9 before you pay them, track what you pay across the year, and issue a 1099-NEC by the deadline if you paid them $600 or more. Keep proof they operate as their own business, such as their contractor registration and insurance.
For a W-2 employee: collect a W-4 and I-9 at hire, run them through payroll with proper withholding, pay the employer taxes, set up workers' comp and unemployment, and issue a W-2 at year end.
This is exactly the kind of thing clean payroll setup and support is built to handle, and it is why contractor bookkeeping keeps subcontractor documentation and job records organized as you go instead of scrambling for it in January.
Start before the first payment, not after. Once someone has been paid as a contractor for months, fixing it is harder and more expensive than getting it right on day one.
Walk through the three IRS areas honestly, then check the Washington angle, especially if you are in construction. When it is genuinely a contractor, get the W-9 and proof they run their own registered, insured business up front. When it is really an employee, put them on payroll from the start. When you are not sure, that uncertainty is the signal to ask, because the gray-area workers are the ones agencies reclassify most often. Keeping this current in your books, alongside the rest of your monthly bookkeeping, turns a compliance risk into a routine.
Is it cheaper to pay someone as a 1099 contractor? On the surface it looks cheaper because you skip payroll taxes, workers' comp, and unemployment. But if the worker is really an employee, those savings are a liability, not a discount. If you are audited and reclassified, you pay the skipped costs anyway, plus penalties and interest. Correct classification is the cheaper option over time.
Can the same person be both a 1099 contractor and a W-2 employee? For the same work, no. In rare cases a person could do genuinely separate work for you in two different roles, but that is uncommon and easy to get wrong. If someone is your employee, pay them as an employee for the work they do for your business.
Do I need to send a 1099 to every contractor I pay? Generally you issue a 1099-NEC to a contractor you paid $600 or more during the year for business services, with some exceptions such as payments to corporations. Collecting a W-9 up front tells you how to handle it. When in doubt, keep the records and confirm the specifics with your CPA.
What if I already misclassified someone? Fix it going forward as soon as you can, and talk to a CPA about the prior periods. There are correction paths, and addressing it proactively is almost always better than waiting for an agency to find it. Plumb Financial can help get the records organized so the cleanup is straightforward.
Does Washington classify workers differently than the IRS? Yes. Washington's Department of Labor and Industries and Employment Security Department each apply their own tests, and construction has stricter requirements than most industries. A worker can pass the federal test and still be a covered employee under state rules, so it is worth checking both.
If you have a helper, a subcontractor, or a new hire and you are not certain whether they belong on a 1099 or a W-2, that is exactly the moment to check rather than guess. Plumb Financial helps service businesses and contractors across Edmonds, Snohomish County, and North King County set up payroll and keep worker records clean so classification is handled correctly from the start. Reach out here and we will help you sort it out before it becomes a problem.
