Single-Member LLC Med Spa: How the Taxes Work and When to Change

Most solo injectors open the same way: a registered nurse or nurse practitioner leaves a hospital or a dermatology practice, forms a single-member LLC on Sunbiz, signs a lease and a medical director agreement, and starts treating patients. The LLC changes her legal position and almost nothing about her taxes, which surprises owners who expected the company to file its own return or lower the bill. The IRS looks straight through the LLC to her and taxes her exactly as it would a sole proprietor: income tax on the profit plus 15.3% self-employment tax on most of it.

What the LLC does give a new practice owner is a set of choices she did not have before, a list of registrations that arrive faster in a med spa than in most businesses (retail skincare means sales tax on day one; the first front-desk hire means payroll), and one question specific to licensed owners: whether the entity should be a professional LLC. Here is how the default works, what the numbers look like on a first full year of profit, and when it is time to change.

Disregarded for income tax, not for liability: myths and facts

A domestic LLC with one owner is a "disregarded entity" for federal income tax unless it elects otherwise. The IRS's own description is that the LLC's activities are reported on the owner's return, on Schedule C for an operating practice. There is no separate business return, no partnership form and no corporate tax. Net profit from Schedule C flows to Form 1040 and is taxed at the owner's personal rates alongside any W-2 income in the household, including a spouse's.

Two things are not disregarded. Employment taxes are one: the day the practice hires a front-desk employee or a second injector, it files Forms 941 and 940 and issues W-2s under its own name and EIN, not the owner's. Certain excise taxes are the other. The IRS says a disregarded LLC with no employees may use the owner's Social Security number, but every bank, card processor and POS vendor will ask for an EIN; get one on the first day.

Now the myths. The LLC does not reduce income tax or self-employment tax; a disregarded LLC owner pays exactly what a sole proprietor pays. It does not protect you from your own malpractice; your professional liability policy does that. And it protects you from nothing if you treat its account as your own. A court respects the LLC when you do: a separate business checking account and card, no personal spending through the practice, the lease and the medical director agreement signed in the LLC's name, and a written operating agreement even for one member. Owner draws are fine; they are transfers to your personal account recorded as distributions, neither deductible nor wages. Routing POS deposits to a personal account, or paying the medical director from a personal card, is how the shield is lost.

Schedule C, self-employment tax and estimated payments in 2026

The tax that catches new practice owners is not income tax but self-employment tax, which replaces the Social Security and Medicare taxes a hospital employer used to split with you. It is computed on Schedule SE at 15.3% of 92.35% of net profit: 12.4% for Social Security on earnings up to $184,500 in 2026, plus 2.9% for Medicare with no cap, per IRS Topic 554. An additional 0.9% Medicare tax applies above $200,000 of combined wages and self-employment income for single filers, $250,000 on a joint return. Half of the self-employment tax is deductible, which lowers income tax but not the SE tax itself.

Schedule C profit is qualified business income, and the Section 199A deduction allows 20% of it, limited to 20% of taxable income. For 2026 the full deduction is available at any level of taxable income below $201,750 for single filers or $403,500 for joint filers. Above those thresholds, Treasury regulations list medical services by nurses, physicians and similar professionals as a specified service field, so a med spa is likely a health business whose deduction phases out over the next $75,000 or $150,000 of taxable income. A first-year solo practice is rarely near those lines.

Because nothing is withheld, you pay as you go. The 2026 Form 1040-ES installments are due April 15, June 15 and September 15, 2026, and January 15, 2027. The safe harbor is to pay in the smaller of 90% of your 2026 tax or 100% of your 2025 tax (110% if 2025 adjusted gross income exceeded $150,000). A practice in its first year has no prior-year tax to lean on, so the working rule is to move 25% to 30% of every net dollar into a tax account from the first deposit. One med spa wrinkle: a cash-method Schedule C reports prepaid package and membership sales when the money arrives, so a strong December promotion is December income, and the January 15 payment has to reflect it. The estimated tax guide for med spa owners covers the timing in detail.

Worked example: a Jacksonville RN's first full year

The figures are illustrative and rounded. A registered nurse opened a solo practice in Jacksonville, Florida in late 2025 as a single-member LLC, with a physician medical director under a written agreement and a part-time front-desk employee hired mid-year. In 2026 the practice collects $420,000 from neurotoxin, filler, laser hair removal and about $30,000 of retail skincare, and nets $110,000 on Schedule C after product, rent, the medical director fee, payroll, software and depreciation. She is single with no other income. The federal computation, before any self-employed health insurance or retirement deduction:

Notice where the money goes. Self-employment tax is $15,543, more than one and a half times the income tax, and it ignores both the standard deduction and the QBI deduction. That is the number the S corporation election is designed to reduce; why it does not help her yet is covered below. Florida adds nothing to this bill: the state has no personal income tax, and a disregarded LLC files no Florida corporate return. The state's only charge on the entity is the $138.75 annual report due May 1 on Sunbiz, with a $400 late fee and administrative dissolution in September for an LLC that ignores it.

Registrations a one-owner med spa still needs

"Disregarded" describes the income tax return and nothing else. A solo practice has more registrations on its first day than most one-person businesses have in their third year, because it sells taxable retail product and pays a licensed physician.

The sales tax row is the one most new owners miss, because they think of themselves as a medical practice rather than a retailer. The moment a $90 jar of medical-grade moisturizer leaves the shelf, the practice is a retailer. Our guide to med spa sales tax on services and products covers what is taxable, and the 1099 guide for medical directors and contractors covers the January filing.

When the S-corp election starts to pay for an owner-injector

An LLC can keep its legal form and change its tax treatment by filing Form 2553: the owner becomes a W-2 employee paid a reasonable salary, payroll taxes apply to the salary only, and the remaining profit passes through free of self-employment tax. The election is effective for the current year if filed within two months and 15 days of the start of the year, so March 15, 2027 for calendar year 2027, and late-election relief under Rev. Proc. 2013-30 reaches back three years and 75 days with reasonable cause.

It does not help the Jacksonville owner yet because of her own market value. She produces every treatment dollar herself, so a reasonable salary is close to what an experienced RN injector earns; BLS put the median registered nurse at $97,550 in May 2025. Run her year as an S corporation with a $95,000 salary: payroll taxes of $14,766 replace $15,543 of self-employment tax, a saving of $777 before she gives up part of her QBI deduction and pays for payroll and a separate Form 1120-S. The election loses money. Run the same practice at $220,000 of profit with a second injector producing half the revenue and a defensible $110,000 salary, and the picture changes: $17,061 of payroll taxes replace $28,770 of self-employment tax, and after about $5,600 of extra income tax from the smaller QBI deduction and roughly $2,500 of overhead, the election nets about $3,600 a year and grows from there. The working rule for an owner-injector: the election pays when profit reliably exceeds a defensible salary by $80,000 to $100,000, which usually means the second producer has arrived. The LLC vs. S-corp guide for med spas runs the full break-even.

The PLLC question for licensed owners

Florida's Chapter 621 allows licensed professionals to form a professional limited liability company, organized for the sole purpose of rendering one specific professional service, with every member licensed to render that same service and "PLLC" in the name. Whether a nurse- or NP-owned practice should be an LLC or a PLLC is a legal question for a health-care attorney licensed in Florida, not a tax question. AmSpa has described Florida as among the least restrictive states on who may own a medical practice; in states with a strict corporate practice of medicine doctrine, such as California and Texas, the clinical entity is typically a physician-owned professional corporation and the non-physician owns a management company instead, a structure with its own tax picture.

For tax purposes the answer is simple. A single-member PLLC is a disregarded entity exactly like a single-member LLC: Schedule C, the same self-employment tax, the same S corporation election on the same form. The only entity choice that changes the default tax picture is the professional association (Florida's professional corporation), which is a corporation from day one and a C corporation unless it files Form 2553. Our guide to setting up a med spa entity in Florida covers the sequence.

Membership changes also change the tax picture. Adding a spouse, the medical director or an investor as a second member makes the LLC a partnership that files Form 1065 by March 15 and issues K-1s; the IRS does not allow the married-couple qualified joint venture election for a business held through an LLC, and Florida is not a community property state. If your spouse simply works in the practice, keep them an employee and keep the LLC single-member.

What usually goes wrong

The most common error is behaving like an S corporation without filing Form 2553: setting up "salary" in Gusto for the owner, or calling draws salary and skipping self-employment tax. The second is skipping estimates in the first year because "the practice has not made money yet," when a cash-method practice that sold $40,000 of packages in November has made money for tax purposes whether or not the sessions have been delivered. Third is selling retail skincare for a year before registering for Florida sales tax, which becomes back tax the practice never collected. Fourth is a Form W-9 completed with the LLC's EIN instead of the owner's number, which mismatches every 1099 the practice receives. Fifth is the annual report, and an LLC dissolved for want of $138.75. And more expensive than any of them: personal spending through the practice account, including the owner's own treatments, until the LLC protects nothing.

When to get help

A single-member LLC practice with modest profit and clean books can run on a simple setup: separate accounts, sales tax registered before the first product sale, 25% to 30% of net profit moved to a tax account, four estimated payments, and the May 1 annual report on the calendar. A professional starts paying for herself when profit passes roughly $80,000, when you are deciding on the S corporation election, when the first injector or front-desk employee arrives and payroll, reemployment tax and workers' compensation rules land at once, or when a spouse, a medical director or an investor is about to become a member.

Those are planning decisions, not filing decisions, and they belong in our med spa tax planning and preparation service, which projects the year, sets the estimates and models the election on your numbers; practices still before opening day start with new med spa launch so the registrations are done in the right order. If you already have the LLC and are not sure the estimates, sales tax account, W-9s and bank setup are where they should be, request a 20-minute fit call and bring last year's Schedule C and this year's POS sales summary.

Jenny Gao, CPA, EA

Founder of Balance Partners, a CPA-led accounting, tax and fractional CFO practice for med spas. Florida-licensed CPA and IRS Enrolled Agent with more than 13 years of accounting and tax experience. Jenny writes and reviews every guide on this site. About Jenny

This guide is general educational information for owners of med spas and aesthetics practices in the United States and is not accounting, tax, legal, medical, payroll or financial advice for your situation. Rules change and vary by entity, state and facts. Balance Partners, LLC does not provide audit, review, compilation or other attest services. Last reviewed November 8, 2026.