After years of preparing tax returns for physicians, one pattern shows up again and again:
Smart, hardworking doctors overpaying the IRS not because they did anything wrong, but because nobody ever walked them through the rules that apply specifically to their income and their profession.
Medical school teaches you how to save lives. It doesn’t teach you how to structure a practice, shelter income, or avoid the penalties that come with a six-figure salary and a packed schedule.
Below are the tax mistakes I see most often among physicians, along with what to do instead.
2026 Numbers Physicians Should Know
- 401(k) / 403(b) / 457(b) deferral limit: $24,500 (+$8,000 catch-up if 50+, or +$11,250 if 60–63)
- IRA contribution limit: $7,500 (+$1,100 catch-up if 50+)
- HSA contribution limit: $4,400 self-only / $8,750 family (+$1,000 catch-up if 55+)
- Section 179 equipment deduction: up to $2,560,000
- Standard deduction: $16,100 single / $32,200 married filing jointly
- Federal estate tax exclusion: $15,000,000 per individual
1. Leaving Retirement Contributions on the Table
Many physicians contribute just enough to their employer’s 401(k) or 403(b) to get the match, then stop. That leaves real money unclaimed.
For 2026, employees can defer up to $24,500 into a 401(k), 403(b), or governmental 457(b) plan. Physicians 50 and older can add a catch-up contribution of $8,000, and those between 60 and 63 can contribute an extra $11,250 instead, if the plan allows it.
Traditional and Roth IRAs also deserve attention. The 2026 IRA contribution limit is $7,500, plus a $1,100 catch-up for those 50 and older. Because most physicians’ income puts them above the Roth IRA phase-out range ($153,000–$168,000 for single filers and $242,000–$252,000 for married couples filing jointly in 2026), direct Roth contributions usually aren’t an option.
That’s where a backdoor Roth IRA comes in: you contribute to a nondeductible traditional IRA, then convert it to a Roth. Done correctly, and coordinated with any other traditional IRA balances you hold, it’s one of the most underused tools in a physician’s retirement plan.
If you have 1099 or locum tenens income on the side, a Solo 401(k) or SEP IRA can shelter thousands more in that income each year, separate from your employer’s plan.
2. Overlooking the Home Office and Equipment Deductions
If you’re a W-2 employee at a hospital or group practice, the home office deduction generally isn’t available to you under current tax law. But if you’re a practice owner or a self-employed physician who does administrative work, billing, or telemedicine from a home office used regularly and exclusively for that purpose, it’s worth claiming.
Practice owners also frequently underuse Section 179, which allows a business to deduct the full cost of qualifying equipment, computers, and other tangible personal property in the year it’s purchased rather than depreciating it over several years. For 2026, the Section 179 deduction limit is $2,560,000, with the deduction phasing out once qualifying purchases exceed $4,090,000. New imaging equipment, exam room furniture, computers, and even certain vehicles used for the practice can qualify.
3. Missing the HSA Advantage
If you’re enrolled in a high-deductible health plan, a Health Savings Account is one of the few accounts in the tax code that offers a triple benefit:
- Contributions are deductible
- Growth is tax-free
- Withdrawals for qualified medical expenses are never taxed
For 2026, the contribution limit is $4,400 for self-only coverage and $8,750 for family coverage, with an additional $1,000 catch-up for those 55 and older.
Too many physicians treat their HSA like a pass-through account, spending down the balance every year instead of investing it and letting it grow. Used strategically, an HSA can function as a second retirement account, since after age 65 you can withdraw funds for any purpose penalty-free (you’ll just owe ordinary income tax on non-medical withdrawals, similar to a traditional IRA).
4. Picking the Wrong Practice Entity Structure
How your practice is structured has a direct effect on your tax bill. Physicians who operate as sole proprietors or single-member LLCs taxed as disregarded entities pay self-employment tax on all of their active income.
Electing S-Corp status, once your income supports it, lets you split compensation between a reasonable salary and distributions, reducing the portion of income subject to payroll taxes.
This isn’t a decision to make alone or based on something you read online. Reasonable compensation rules, state-specific issues, and the administrative cost of running payroll all factor in. A tax professional who understands medical practice management can model the numbers and tell you whether an S-Corp election actually saves you money at your income level, or whether it’s not yet worth the added complexity.
Entity choice also matters when you’re buying into a practice, selling one, or negotiating a partnership agreement. Goodwill, equipment, and other practice assets are treated differently for tax purposes depending on how the deal is structured, and a covenant not to compete attached to a buy-in or buyout can carry its own tax consequences.
5. Mishandling 1099 and Locum Tenens Income
More physicians than ever are picking up 1099 income through locum tenens work, telehealth platforms, expert witness consulting, or moonlighting. That income isn’t withheld the way W-2 wages are, and it’s taxed as active income on Schedule C, along with the full 15.3% in self-employment tax if you have no other offsetting factors.
The two mistakes I see most: not making quarterly estimated payments using Form 1040-ES or the Electronic Federal Tax Payment System, which leads to underpayment penalties at filing time, and not tracking deductible expenses against that income. Legitimate expense deductions against 1099 income, if properly documented, include:
- Business mileage and travel
- Continuing Medical Education courses
- Professional association fees
- Malpractice and business insurance
- Office supplies and equipment
- Marketing costs
- Legal and accounting fees
6. Neglecting Estate and Insurance Planning
Financial planning for physicians isn’t only about minimizing this year’s taxable income. Doctors are frequent targets for lawsuits, and without proper structuring, a large estate can create real exposure, both to creditors and, eventually, to estate tax.
The 2026 federal estate tax exclusion is $15,000,000 per individual, which covers most physicians, but state-level estate taxes in several states kick in at much lower thresholds.
A will and, in many cases, a broader set of estate plans (trusts, powers of attorney, healthcare directives) should be in place well before your net worth grows large enough to matter.
Disability insurance is just as important and just as overlooked. Your ability to earn an income as a physician is your most valuable financial asset, and an employer-provided policy is rarely enough coverage on its own, since group disability benefits are often capped and may be taxable if your employer paid the premiums.
If you’re paying student loans, be aware that the student loan interest deduction phases out at income levels most attending physicians exceed, so don’t count on it once your salary increases. And if you’re weighing life insurance, understand the difference between term coverage and whole or variable life insurance before a salesperson explains it to you; the tax treatment and cost structure are very different.
Life changes deserve the same attention. Divorce affects filing status, dependent claims, and how retirement accounts and property are divided, and getting the tax treatment wrong at that stage can be costly.
Physicians with school-age children who hold custodial investment accounts should also understand how kiddie tax laws apply, since a child’s unearned income above a certain threshold can be taxed at the parent’s rate rather than the child’s.
7. Trying to DIY Instead of Building a Tax Team
Off-the-shelf tax preparation software is built for simple returns: one W-2, the standard deduction, and not much else. For 2026, that standard deduction is $16,100 for single filers and $32,200 for married couples filing jointly.
Most physicians’ financial lives, multiple income sources, practice ownership, real estate, charitable contributions, itemized deductions, retirement accounts, are complex enough that software alone will miss opportunities or, worse, create errors that draw the attention of the Internal Revenue Service.
A tax professional who works specifically with physicians will catch things a generalist won’t: how residency-to-attending transitions affect your bracket, how divorce affects filing status and dependent claims, how the Alternative Minimum Tax interacts with your deductions, or how rental property income and depreciation should be reported if you own real estate outside your practice.
The goal isn’t just avoiding an IRS penalty. It’s building a relationship with someone who understands your full financial picture year-round, not just during tax season.
The Bottom Line
Most of these tax mistakes aren’t the result of carelessness. They happen because physicians are busy treating patients and simply haven’t had anyone explain the rules built for their specific situation. A little planning, done consistently, protects the income you’ve worked hard for and puts it to work for your family’s future instead of handing more of it to Uncle Sam than the law actually requires.
If any of this sounds familiar, it’s worth a conversation before your next tax return is due, not after. Talk to our team about proactive tax planning built specifically for physicians and medical practices, and find out what you may be leaving on the table.