1099 vs W-2 for Dental Staff: Classifying Hygienists and Assistants

There is no single 1099 test.

A worker you pay as a contractor is read by three authorities at once — the IRS for employment taxes, the Department of Labor for the FLSA's wage rules and, in states such as California, Massachusetts, New Jersey and Illinois, a statute with its own test.

Each applies its own analysis, and all of them weigh the same raw material: who really controls the work.

The IRS test.

The IRS applies common-law rules and sorts the evidence into three categories: behavioral control, financial control and the type of relationship.

Behavioral control is the one that matters most at the chair: does the practice control, or have the right to control, what the worker does and how?

If you genuinely cannot tell which side of the line a role falls on, file Form SS-8 and ask the IRS to determine the worker's status — though the IRS notes it may take at least six months to receive a determination.

The DOL test.

The Department of Labor asks under the FLSA, where the answer decides whether minimum wage and overtime protections apply at all: employees receive the Act's protections; genuine independent contractors, who are in business for themselves, are not covered.

The regulation on the books (29 CFR part 795) was published January 10, 2024 and took effect March 11, 2024, and it weighs the facts as a totality of the circumstances: no single factor or subset of factors is necessarily decisive.

Where the rulemaking stands.

Pin the dates down, because this rule has been moving.

Since May 1, 2025, DOL investigators have not applied the 2024 rule in their own enforcement — but the 2024 rule remains in effect for private lawsuits.

On February 27, 2026, DOL proposed rescinding the 2024 rule and returning, with modifications, to its January 2021 rule, a version that treats two factors as core: the nature and degree of control over the work, and the worker's opportunity for profit or loss.

As of October 7, 2026 the Federal Register shows no final rule replacing the 2024 rule; the 2024 rule is still the regulation on the books.

The state layer.

California and Massachusetts apply the ABC test in their wage laws, and New Jersey and Illinois apply a version of it in their unemployment laws — statutes that presume the worker is an employee unless the business proves otherwise.

Each is covered below.

Run a staff hygienist through those tests and the same facts keep pointing the same way.

Under the 2024 DOL rule, facts relevant to control include whether the potential employer sets the worker's schedule, supervises the performance of the work, or explicitly limits the worker's ability to work for others.

Your front desk fills the hygienist's column; you review the care; your policies say when they can work elsewhere.

Each is a control fact, and each points toward employee status.

Centrality cuts the same way.

The 2024 rule treats work that is critical, necessary or central to the employer's principal business as pointing toward employee status — and hygiene and chairside assisting are what a dental practice is in business to do.

A graphic designer who formats your recall cards can plausibly be a vendor.

The person producing your hygiene schedule is doing work central to the practice's principal business.

Neither does skill decide it.

The 2024 rule is explicit that a worker's specialized skills — a license, for example — are not themselves indicative of contractor status, because employees can be skilled workers too.

A licensed hygienist working under your direction fits that description: a skilled worker whose license does not, by itself, switch the label to contractor.

The other core factor in the 2021 rule DOL proposes to restore — the worker's opportunity for profit or loss — reads the same arrangement the same way.

A hygienist paid a set rate for a shift in your chair presents no margin to earn and no loss to absorb on the shift, so on this factor the arrangement points toward employee status.

The IRS behavioral-control category reads it the same way too.

What does not decide it is the paperwork.

DOL looks at how the parties actually work: a skillfully devised contract may suggest an independent contractor while the actual practices of the parties establish an employment relationship.

That is why the pitch — they sign a contractor agreement, so the practice sends them a 1099 — does not settle it.

If the schedule book, the supervision and the flow of patients say employee, the contract's label does not override them.

Front-office roles resolve even faster.

A treatment coordinator on your schedule, working your systems and your patients, shows little of the independence these tests look for.

Temporary coverage does not by itself change the analysis — it changes who the employer may be, and that is the part to read carefully.

A temp can arrive through a staffing agency, through a marketplace app where you book a professional directly, or from your own per-diem list.

A staffing agency can be the employer of the temps it sends out — New York City's employment-agency licensing checklist describes a staffing agency in exactly those terms: "You are the employer, and you contract out your employees, all of whom receive a W-2 form from you."

That does not take your practice out of the picture.

DOL describes staffing agencies and their clients as a typical vertical joint-employment scenario under the FLSA, and joint employers are jointly and severally liable for the employee's minimum wage and overtime.

Read the staffing agreement closely: it should say who directs the temp's clinical work chairside, what happens when a shift falls through, and how either side can end the arrangement.

Marketplace apps vary more, and the differences live in their terms.

GoTu says dental offices can book shifts either as contractor (1099) or as employee (W-2), with the platform handling the payout either way.

Cloud Dentistry goes the other way: its user agreement, effective February 15, 2024, makes the practice and the provider responsible for classifying the provider as an independent contractor or an employee — and states that the practice assumes all liability for that determination.

Booking through an app does not answer the classification question; the platform's terms decide how liability is split between you and the platform.

Booking a temp does not put the tests on hold, either.

A hygienist you book for every Saturday rotation is on your schedule, in your operatory, doing your patients' cleanings — the same facts that point to employee status for a staff hire.

Where temp coverage differs is the commitment around the shifts: how relief work compares with a permanent role is covered in our guide to temp vs full-time hygienists, and what the per-diem shift pays on the worker's side in temp hygienist pay.

The ABC tests flip the default.

California's version, Labor Code 2775, presumes a worker is an employee unless the hiring entity can show all three of the following: the worker is free from the entity's control; the work is outside the usual course of the entity's business; and the worker is customarily engaged in an independently established business of the same kind.

Clinical staff run aground on the middle prong: hygiene services are the usual course of a dental practice's business.

The third prong is hard for the same worker — a hygienist treating your patients in your operatories is not showing a customarily independent hygiene business of the same kind.

The exemption that matters for dentists does not reach your staff.

California's Labor Code 2783 exempts licensed physicians and surgeons, dentists, podiatrists, psychologists and veterinarians from the ABC test; dental hygienists and dental assistants are not on that list.

And even for dentists the exemption changes the test, not the answer — it routes them to a different, older California analysis rather than declaring them contractors.

That dentist-specific question is covered in our guide to 1099 associate dentists.

Massachusetts applies a three-part ABC test under its wage laws: freedom from control, in the contract and in fact; service outside the usual course of the employer's business; and a customarily independent business.

A practice hygienist runs aground on the same middle prong — hygiene is the usual course of your business.

New Jersey uses an ABC test in its unemployment law whose middle prong is met either by work outside the usual course of the business or by work performed outside all of the business's places of business.

A hygienist in your operatories is inside both.

Illinois' Unemployment Insurance Act treats service for an employing unit as employment unless the business proves the same three-part pattern: free from control, outside the usual course of business or outside all its places of business, and an independently established trade or business.

For both states, what this page can source is the unemployment test; how each state's wage law classifies workers is not covered here, so confirm it with the state labor agency or counsel.

This is not a full map of state classification law — it is the part this page can source.

Before you pay anyone as a contractor, confirm which test your state applies and whether any exemption names your worker's license; your state labor agency or employment counsel can answer that.

If the tests say employee and you paid the worker as a contractor, the bill arrives from several directions.

The IRS's is the most direct: IRS Publication 15-A says a business that classifies an employee as an independent contractor with no reasonable basis is liable for the employment taxes for that worker.

Section 3509 sets the non-willful rates: income tax withholding computed at 1.5% of the wages, and 20% of the employee's share of FICA.

If the practice also failed to file the required information returns — the Forms 1099 themselves — the rates rise to 3% and 40%.

The reduced rates are modest relief, and they assume the misclassification was not intentional.

The FLSA adds wage exposure: an employer that violates its minimum wage or overtime rules owes the unpaid wages plus an additional equal amount as liquidated damages — effectively doubling the wage shortfall.

A hygienist reclassified after long clinical weeks is the fact pattern that grows the number: the more unpaid hours, the larger the doubled total.

States add their own.

California's willful misclassification penalty runs $5,000 to $15,000 per violation, and the range climbs again when the conduct is part of a pattern or practice.

Budget the state side separately from the federal numbers above.

If you have been paying staff as contractors and the tests point the other way, the IRS runs a structured off-ramp.

The Voluntary Classification Settlement Program (VCSP) reclassifies the workers as employees going forward and closes the look-back at 10% of the employment tax liability for the most recent tax year, computed at the reduced section 3509(a) rates — a fraction of the ordinary exposure.

Eligibility has teeth.

You must have filed all required Forms 1099 for the workers being reclassified for the previous three years, and you cannot be under an IRS employment-tax audit or a DOL or state classification audit.

For a practice that never issued the 1099s at all, that first requirement is the door that stays shut — which is its own reason to file 1099s properly for anyone you do treat as a contractor.

Timing matters too.

You apply on Form 8952, at least 120 days before the date you want to start treating the workers as employees — build that lead time into the transition plan.

The program settles the federal tax piece only.

State unemployment, wage and penalty exposure is separate, and in a state like California the willful misclassification penalty sits in state statute — take the state side to employment counsel before you file.

From there the fix is unglamorous and effective: move the schedule onto payroll, keep the supervision you already had, and document it.

For everything else involved in the hire — screening, pay structure, the offer — the dental hiring hub organizes the employer guides by stage.