1099 Physician Taxes: Deductions, Estimated Payments and When to Consider an S Corp

Moving from hospital employment to independent contracting can change more than your compensation. It changes who handles withholding, how you document expenses and how you fund retirement.

1099 physicians generally pay federal income tax and self-employment tax on net business earnings, make estimated payments when required and claim eligible business deductions supported by records. An S corporation may be worth reviewing, but the decision depends on reasonable compensation, administrative costs and the physician’s wider financial picture.

Good tax planning for physicians starts before the first filing deadline. It connects each contract payment to the expenses, reserves and decisions that follow.

From W-2 employment to 1099 work: a physician’s first year

Consider Dr. Maya Patel, a hypothetical Florida physician who leaves a hospital position in June and begins independent clinical work in July. She receives $150,000 of W-2 wages in the first half of the year and collects $180,000 from contracting in the second half.

Her contracting expenses total $20,000, leaving $160,000 of business profit before personal tax adjustments and retirement deductions. These figures illustrate the planning process; they are not a tax estimate.

Item	Employment period	Independent contracting period
Income received	$150,000 in wages	$180,000 in gross receipts
Business expenses in this example	Outside this illustration	$20,000
Business profit	Not applicable	$160,000
Federal withholding	Handled through payroll	Usually no withholding on contractor payments
Planning records	Pay statements, W-2, benefit records	Contracts, receipts, accounting records, payment confirmations

Maya’s first mistake would be treating each $30,000 contracting deposit as available personal spending. Her second would be estimating tax on contracting income without including the wages she already earned.

Her accountant needs both sides of the year. The same applies to a physician who keeps an employed position while adding weekend locum tenens work.

How 1099 doctor taxes work

A sole proprietor generally reports business income and expenses on Schedule C and calculates self-employment tax on Schedule SE. A single-member LLC usually follows this treatment unless it elects a different federal tax classification.

Self-employment tax generally combines 12.4% Social Security and 2.9% Medicare taxes. The Social Security portion has an annual earnings limit; Medicare does not. W-2 wages affect the remaining Social Security limit, and higher earners may also owe Additional Medicare Tax. The calculation generally begins with 92.35% of net self-employment earnings. The employer-equivalent portion is generally deductible for income-tax purposes, but that deduction does not reduce self-employment tax itself.

For Maya, multiplying all contracting profit by 15.3% would overlook her earlier wages. Her return needs a coordinated calculation.

Report business income even if a payer does not issue a Form 1099. Also, receiving a 1099 does not by itself establish that worker classification is correct. See the IRS self-employment tax guidance.

Common 1099 physician tax deductions

Deductible business expenses generally must be ordinary and necessary. Eligibility depends on the expense’s purpose, business use and applicable limitations.

Expense	What to review
Malpractice insurance	Business coverage the physician pays
Medical licenses, DEA registration and professional dues	Connection to current professional work
Continuing medical education	Qualifying education that maintains or improves existing skills; education qualifying you for a new profession is treated differently
Accounting, legal and billing fees	Business portion of the service
Equipment and software	Business-use allocation and whether expensing or depreciation applies
Phone and internet	Documented business share
Business travel	Tax-home rules, temporary assignments and business purpose
Vehicle expenses	Qualifying business mileage; ordinary commuting is generally personal
Business meals	Generally subject to a 50% deduction limit and substantiation rules
Home office	Generally requires qualifying regular and exclusive business use

Self-employed health insurance may qualify for a separate personal-return deduction, subject to eligibility and earned-income limits. It should not automatically be booked as a Schedule C expense. See IRS Publication 334.

For Maya, a receipt folder alone is not enough. She needs to know which costs the hospital reimbursed, which she paid personally and which relate to her independent work. A single conference invoice may also need separate treatment for registration, travel and personal activities.

Build expense tracking into your monthly routine

Open a dedicated account for contracting receipts and use a separate card for business spending. Reconcile both monthly rather than rebuilding the year from bank statements in April.

Keep invoices and receipts with short notes explaining business purpose. For travel, record the assignment location, dates and reimbursement arrangement. For mixed-use costs, record how you calculated the business portion.

Maya’s monthly review should answer three questions: Did every payment reach the books? Are the expenses supported? Does the updated profit change her tax projection?

This routine also makes it easier to evaluate whether a higher-paying contract produces more usable income after travel, insurance and other obligations.

Tax reserves and estimated payments serve different purposes

A tax reserve holds cash for future obligations. An estimated payment sends money to the tax authority. Moving funds into savings does not count as paying tax.

Suppose Maya’s individualized projection calls for reserving 35% of monthly profit. On $30,000 of collections and $3,000 of expenses, that would mean transferring $9,450 into her reserve. The percentage is illustrative, not a recommended rate for every physician. Filing status, other income, deductions, withholding and work locations can change it substantially.

Estimated payments are generally required when an individual expects to owe at least $1,000 after withholding and credits. Federal penalty protection commonly involves timely payments covering at least 90% of current-year tax or 100% of prior-year tax. The prior-year percentage generally rises to 110% when prior-year adjusted gross income exceeds $150,000, or $75,000 for married filing separately. Prior-year eligibility conditions apply.

2026 payment period	Standard federal due date
First installment	April 15, 2026
Second installment	June 15, 2026
Third installment	September 15, 2026
Fourth installment	January 15, 2027

A safe harbor can protect against an underpayment penalty while still leaving tax due at filing. Timing matters; a late payment may not cure an earlier shortfall. Uneven income may warrant the annualized income installment method. Remaining W-2 withholding can also be part of the plan. See IRS Publication 505 for 2026.

For a Florida physician taking assignments elsewhere, include a state-by-state review. A Florida address does not resolve every obligation associated with out-of-state work.

Review retirement plans before committing cash

Maya contributed to her hospital’s 401(k) before leaving. She should provide those contribution records before funding a plan for her contracting business.

A one-participant 401(k) generally covers an owner with no employees, or the owner and spouse. It permits employee deferrals and employer contributions. Employee elective-deferral limits apply across plans, so opening another 401(k) does not create a second full personal deferral allowance. Self-employed employer contributions require a specific earned-income calculation. Hiring eligible employees changes the plan analysis, and annual filings may be required. See the IRS one-participant 401(k) guidance.

A SEP IRA or, for an established business, a cash balance arrangement may also warrant review. Compare funding capacity, employee coverage, administration and deadlines before selecting a plan. Maya needs a contribution strategy she can fund while preserving money for taxes and operating costs.

When should a physician consider an S corporation?

An LLC is a legal entity; S corporation status is a federal tax election. An eligible LLC can elect S corporation taxation. The election does not automatically make the physician’s income tax-free.

An S corporation must pay reasonable compensation to a shareholder who performs services before making non-wage distributions. The IRS can reclassify distributions as wages. Its guidance specifically considers the source of gross receipts: revenue generated by the shareholder’s personal services is relevant to compensation.

For a physician whose revenue largely comes from their own clinical work, a very low salary needs careful scrutiny. Retirement contributions are based on qualifying compensation, not S corporation distributions, and shareholder health insurance has special reporting requirements.

Sources: IRS S corporation compensation guidance and IRS retirement contribution guidance.

Before recommending an election, compare:

• Expected recurring profit and a supported reasonable salary.
• Potential employment-tax differences, including existing W-2 wages.
• Payroll, separate tax-return and accounting costs.
• Retirement funding and health-insurance treatment.
• Election timing, professional-entity requirements and contract arrangements.

There is no universal income threshold at which every physician should elect S corporation treatment. Maya’s partial transition year may produce a different result from her first full year of independent work.

Do physicians qualify for the QBI deduction?

Medical services generally fall within the health category of specified service trades or businesses. The qualified business income deduction can therefore be limited or eliminated as taxable income rises above the applicable thresholds. An S corporation election does not remove that classification. Eligibility requires a household-level calculation, and wages are not QBI. See the IRS qualified business income guidance.

A first-year tax planning checklist for physicians

Before your next planning meeting, gather:

• Clinical contracts and payment or reimbursement terms.
• Year-to-date W-2 wages and withholding, plus your prior-year return.
• Business bank statements, expense records and equipment purchases.
• Assignment locations, travel records and mileage logs.
• Health-insurance details and existing retirement contributions.
• Estimated-payment confirmations and entity documents, if applicable.
• Expected remaining shifts, revenue and major expenses.

These records turn a general discussion about deductions into a practical plan for cash reserves, payment deadlines and year-end decisions.

Ongoing accounting and tax planning for physicians

Your contracting income can change with each assignment. Your accounting and tax plan should keep pace.

McGregor Financial Services helps independent physicians connect business accounting, tax preparation and ongoing planning. An initial review can identify gaps in expense tracking, update estimated payments, coordinate retirement decisions and assess whether an entity review is appropriate.

Explore MFS services for healthcare professionals or speak with an advisor about transitioning to 1099 work or adding independent clinical income.