Tax Planning for 1099 Physicians

When you shift from W-2 to 1099 income, one of the first decisions is how to structure your business. LLC, PLLC, Professional Corporation, and sole proprietorship each carry different tax treatment, liability exposure, and state requirements.

Many states require physicians to use a PLLC or Professional Corporation rather than a standard LLC for medical services. California, for example, does not permit LLCs for physicians at all. Choosing the wrong structure, or delaying the decision entirely, could mean paying more in tax than necessary for every month you wait.

Your entity decision also sets the foundation for your S-Corp election, retirement plan options, and how your deductions are reported. Getting this right early creates a structure that supports every other planning opportunity. For a full breakdown of entity types and state by state rules, see our physician entity formation page.

For most 1099 physicians above a certain net self employment income threshold, electing S-Corp tax treatment is the single most impactful planning move available. It restructures how your income flows so that a meaningful portion is no longer subject to self employment tax.

Here is how it works. You pay yourself a reasonable salary through physician payroll, which is subject to FICA (Federal Insurance Contributions Act) taxes. The remaining profit is taken as a distribution, which is subject to income tax but not FICA. The spread between your salary and your total net income is where the savings occur.

The IRS requires that your salary be "reasonable" for your specialty, geography, and hours worked. Setting it too low invites scrutiny. Setting it too high eliminates the benefit. Specialty benchmarks from MGMA and similar sources help determine the right number.

S-Corp election also requires annual compliance, including a separate business return (Form 1120-S), payroll filings, and reasonable compensation documentation. In states that offer a Pass Through Entity Tax (PTET) election, your S-Corp may also be able to pay state income tax at the entity level, effectively bypassing the SALT (state and local tax) deduction cap. For the complete guide to S-Corp election, including how savings scale at different income levels, see our Physician S-Corp Guide. For details on PTET, see our PTET guide for physicians.

Independent physicians have access to a wide range of deductions that W-2 physicians cannot claim. The key is knowing which expenses qualify, documenting them properly, and categorizing them as they happen rather than reconstructing a full year from memory at filing time.

Common deductions for 1099 physicians may include home office, mileage, travel, meals during business, CME and continuing education, licensing and board certification fees, malpractice insurance, professional dues, equipment, phone and internet, and health insurance premiums. Each has specific documentation and substantiation requirements.

Most missed deductions are not obscure. They are ordinary business expenses that were never recorded or were categorized incorrectly. A physician who tracks expenses in real time through proper physician bookkeeping will capture deductions that a physician reconstructing records in March will miss.

Beyond standard deductions, 1099 physicians with an S-Corp may also benefit from the Augusta Rule, which allows your business to rent your personal home for meetings on a limited number of days per year. For the full deduction list organized by category, visit our physician tax deductions guide. For Augusta Rule specifics, see our Augusta Rule guide for physicians.

1099 physicians have more retirement plan flexibility than almost any other taxpayer, and the right combination of plans can shelter substantial income from taxes each year.

A Solo 401(k) typically outperforms a SEP IRA for physician income levels. It allows both employee and employer contributions, includes a Roth component, and permits loan provisions that a SEP IRA does not offer. For physicians with high income, a cash balance (defined benefit) plan can be layered on top of a Solo 401(k) to shelter additional income. The contribution limits on cash balance plans increase with age, making them especially valuable for physicians in their 40s, 50s, and beyond.

Backdoor Roth IRA contributions and additional backdoor Roth strategies through employer plans provide tax free growth opportunities. When you stack a Solo 401(k), a cash balance plan, and backdoor Roth contributions together, the total tax sheltered amount can be substantial.

If you currently have a SEP IRA, it may be worth evaluating whether a Solo 401(k) would serve you better. For the details on every plan type and how they stack, see our Physician Retirement Tax Guide. You can also read our blog post on the SEP IRA trap for a closer look at why many physicians outgrow the SEP.

Without an employer withholding taxes on your behalf, you are responsible for making quarterly estimated payments to the IRS and your state. Get it wrong in either direction and there are consequences.

Underpaying triggers penalties and interest. Overpaying ties up cash you could deploy into retirement plans, investments, or your practice. Safe harbor rules allow you to avoid penalties by paying at least 110% of your prior year liability (for higher income taxpayers), but safe harbor is not always the optimal approach if your income fluctuates significantly.

The annualized income method can reduce required payments during lower income quarters, which is especially relevant for physicians whose 1099 income varies by season or assignment. Mid year adjustments are critical when your income changes materially from projections. Our tax team handles quarterly projections and payment calculations as part of every 1099 physician engagement. For the full details, see our physician estimated taxes guide.

If you work across state lines, whether through locum tenens assignments, telemedicine, consulting, or expert witness work, each state where you earn income may require its own filing. Filing requirements, reciprocity agreements, credits for taxes paid to other states, and income sourcing rules vary widely from state to state.

Some states require filing even for a few days of work within their borders. Others have reciprocity agreements that simplify the process. California is known for aggressive sourcing rules. States with no income tax eliminate one layer of complexity but do not eliminate federal filing obligations.

Getting multi-state filing wrong means either double paying tax you did not owe or failing to file in a state that will eventually come looking for its share. You need a tax team that tracks every state obligation proactively. For a deep dive on multi-state rules, see our multi-state tax guide for physicians. If you are primarily a traveling physician, our locum tenens tax page covers additional considerations specific to your situation.