The Complete Guide to Quarterly Estimated Taxes

Illustration of a doctor reviewing a calendar, tax documents, and financial charts for quarterly estimated tax planning

In a Nutshell Quarterly estimated taxes are payments you send to the IRS four times a year on income that doesn’t have taxes withheld. For 2026, the deadlines are April 15, June 15, September 15, and January 15, 2027. If you’re a doctor with side income, run a private practice, or work as a locum…

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W-2 and 1099 Physician Income Safe Harbor Rules: A Beginner’s Guide

Laptop displaying W-2 and 1099 physician income safe harbor tax planning presentation in a modern medical office workspace

In a Nutshell If you’re a physician earning income from both a hospital job (W-2) and side gigs like locums or telehealth (1099), the IRS expects you to pay taxes as you earn, not just in April. The irs safe harbor rule is your shield against underpayment penalties. Pay either 90% of what you’ll owe…

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S Corp vs Professional Corporation (PC) vs PLLC: What Physicians Need to Know

Physician reviewing PLLC, PC, and S Corp business structures with a tax advisor in a medical office setting

In a Nutshell Picking the right business structure as a physician isn’t just paperwork. It directly affects how much tax you pay, how protected your personal assets are, and whether your state will even let you operate the way you want. Here’s the short version: A Professional Corporation (PC) is a formal corporate structure that…

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How to Determine a “Reasonable Salary” as a Physician S Corp Owner

Illustration of a physician S Corp owner reviewing reasonable salary, pay stub, salary benchmarks, and compensation analysis with a tax advisor.

In a Nutshell The IRS requires you to pay yourself a fair salary before taking distributions from your S Corp. “Reasonable” means what another physician with your specialty, experience, and workload would earn doing the same job. Pay yourself too little, and the IRS can reclassify your distributions as wages, plus add penalties and back…

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The Basics of S Corps for Business Owners: A Physician’s Beginner Guide

S Corp Basics physician guide with tax planning forms, calculator, stethoscope, and office tools on a blue desk.

In a nutshell: If you’re a physician running your own practice or doing locum work, an S Corp can lower your self-employment tax bill by splitting your income into a “reasonable salary” plus distributions. You only pay payroll taxes on the salary portion. It’s not magic, and it’s not for everyone, but for high-earning doctors,…

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