Physician Retirement Planning: How to Shelter $72,000–$200,000+ Per Year
Most physicians start saving for retirement late. Residency and fellowship can take 7 to 12 years after medical school, and during that stretch there’s little left over after student loan payments and basic living expenses. By the time income spikes in your first years of practice, you’re already a decade behind your peers in other professions who’ve been maxing out 401(k)s since their mid-20s.
The good news: if you have self-employment income, you have access to retirement accounts that W-2 employees can’t touch. A solo 401(k) alone can shelter $72,000 per year from federal taxes. Stack a cash balance or defined benefit plan on top, and total annual contributions can reach $200,000 or more. For a physician in the 37% federal bracket, that’s $74,000 in federal tax savings in a single year — not counting state taxes.
Physician retirement planning isn’t just about picking funds. It’s about structuring your business the right way, choosing the right account types, and funding them aggressively during your peak earning years. This guide covers what’s available, how the numbers work, and when to add more complex strategies.
How much can a physician shelter in a retirement account per year?
A self-employed physician in 2026 can contribute up to $72,000 to a solo 401(k) — combining employee and employer contributions. Add a cash balance or defined benefit plan, and total annual contributions can exceed $200,000 for physicians in their 40s and 50s. These contributions reduce taxable income dollar-for-dollar. For a physician in the 37% federal bracket, a $200,000 retirement contribution can reduce federal taxes by $74,000 in a single year. (All 2026 limits; verify current limits with your CPA or at irs.gov.)
Key Takeaways
- Solo 401(k) contributions in 2026: up to $72,000 total (employee + employer), or $80,000 if age 50+
- Physicians can stack a cash balance plan on top of a solo 401(k) for $150,000–$200,000+ in combined annual tax-deferred contributions
- Defined benefit plans favor high-income physicians 45+ who started saving late — the older you are, the higher the allowable contribution
- Most physicians can’t contribute directly to a Roth IRA (income phases out at $246,000 MFJ in 2026), but the backdoor Roth and mega backdoor Roth strategy are available
- S-Corp structure amplifies retirement savings — both employee deferral and employer contribution are available on your W-2 salary
- Setting up a defined benefit plan requires actuarial work — do this in October or November, before year-end
Why Physicians Need an Aggressive Retirement Strategy
The math on late starts is brutal. A physician who graduates residency at 32 and starts practice has roughly 30 years until a typical retirement age of 62. That sounds like plenty of time — until you compare it to a software engineer who’s been contributing since 24.
But the window isn’t just shorter. It’s more expensive to use. High-income physicians face a 37% federal marginal rate, potential 3.8% net investment income tax (NIIT), and state income tax that can push the combined marginal rate past 50% in high-tax states. Every dollar sheltered in a retirement account avoids those rates now and grows tax-deferred until withdrawal.
Student loan debt adds another complication. Many physicians carry $200,000–$400,000 in loans from medical school. In early practice years, those payments compete directly with retirement savings. The result: physicians who enter their peak earning years at 40+ with minimal retirement savings and a short runway to build wealth.
The solution is to use every available account, fund them to the maximum, and structure your business to amplify the contribution limits. That’s what this guide covers.
Retirement Account Options for Self-Employed Physicians
Not every account type is right for every physician. Your practice structure, income level, age, and whether you have employees all determine which options are available.
| Plan Type | 2026 Max Contribution | Best For | Key Requirement |
|---|---|---|---|
| Solo 401(k) | $72,000 ($80,000 age 50+) | Solo practitioners, no full-time employees | No full-time W-2 employees other than spouse |
| SEP-IRA | $72,000 | Simpler setup, no employees | 25% of W-2 comp (S-Corp) or 20% of net SE income |
| SIMPLE IRA | $16,500 + employer match | Small practices with employees | Must match or contribute for all eligible employees |
| Defined Benefit | Up to $290,000/yr benefit | High-income physicians 55+, late start | Annual actuarial contribution required |
| Cash Balance | Varies ($100K–$200K+) | Age 45+ with high, consistent income | Actuarially determined; complex to reduce or stop |
All limits are 2026 figures, subject to annual IRS adjustment. Verify current limits at irs.gov before contributing.
Contribution limits are subject to annual IRS adjustment — verify current limits at irs.gov or with your CPA.
The Solo 401(k) — The Workhorse for Most Physicians
For a solo practitioner or a physician with an S-Corp and no full-time employees (other than a spouse), the solo 401(k) is the starting point. It has two contribution components that together create the $72,000 ceiling.
Employee deferral: Up to $24,500 in 2026. If you’re 50 or older, add a $8,000 catch-up contribution — that’s $31,000 as the employee. This portion can go into a Roth or traditional account depending on your plan.
Employer contribution: Up to 25% of your W-2 compensation if you’re operating as an S-Corp, or approximately 20% of net self-employment income for sole proprietors. This portion is always pre-tax.
Combined limit: $72,000 total in 2026 ($80,000 if age 50+). That’s the ceiling per the IRS contribution limit rules.
A few practical points:
- The plan must be established before December 31 of the tax year you want to use it. Contributions can be funded up to the tax filing deadline (including extensions), but the plan document must exist before year-end.
- Many solo 401(k) providers allow after-tax contributions — the basis for the mega backdoor Roth strategy (covered below).
- You can’t have full-time W-2 employees other than your spouse. If you hire a full-time employee, you’ll need to either exclude them (if allowed) or switch plan types.
See our S-Corp 401(k) guide and solo 401(k) Roth overview for deeper detail on setup and provider selection.
Adding a Cash Balance or Defined Benefit Plan
Once you’re maxing out the solo 401(k), the next tool is a cash balance plan — a type of defined benefit plan that works like a pension but is expressed as a notional account balance rather than a monthly benefit at retirement.
The core mechanic: the older you are, the more you can contribute each year. Actuarial tables require higher annual contributions to fund the same promised benefit by retirement age, so physicians who start these plans at 45+ can shelter dramatically more than the solo 401(k) cap alone.
Approximate annual contribution ranges by age (cash balance plan, 2026):
| Age | Approximate Annual Contribution |
|---|---|
| 45 | $100,000–$150,000 |
| 50 | $150,000–$200,000 |
| 55+ | $200,000+ |
Stacked with a solo 401(k), combined annual contributions of $150,000–$290,000+ are possible for physicians 45 and older.
A few things to know before committing:
- Cash balance plans require consistent contributions for several years. You can’t just fund them in a good year and skip a bad year without actuarial consequences.
- They require a third-party administrator (TPA) and annual actuarial certification — typically $2,000–$5,000 per year in plan costs.
- They must be established before December 31 of the tax year, with the first contribution due by the tax filing deadline.
- They work best when income is high and consistent — if revenue swings significantly year to year, a defined benefit plan carries funding risk.
This approach is most valuable for physicians 45+ with consistent earnings above $400,000 who want to shelter far more than the solo 401(k) cap and have the cash flow to fund it reliably.
Roth Strategies for High-Income Physicians
Most physicians can’t contribute directly to a Roth IRA. The income limit phases out at $242,000 for married filing jointly in 2026 — and anyone earning more than that at the phase-out ceiling is locked out of direct contributions. But two workarounds are available.
Backdoor Roth: Contribute to a traditional IRA on a non-deductible basis (no income limit for contributions, only deductibility is limited), then convert to a Roth IRA. The conversion is tax-free if you have no existing pre-tax IRA balances. If you do, the pro-rata rule applies — a portion of the conversion becomes taxable.
Mega backdoor Roth: If your solo 401(k) allows after-tax contributions and in-plan Roth conversions, you can contribute beyond the $24,500 employee deferral limit on an after-tax basis, up to the total $72,000 annual cap. Convert those after-tax contributions to Roth inside the plan. The result: a much larger Roth balance than a direct Roth IRA would allow.
The mega backdoor Roth strategy adds complexity but can be worth it for physicians who want tax-free income in retirement alongside their tax-deferred accounts. Note: not all solo 401(k) providers support after-tax contributions or in-plan conversions — confirm plan features before relying on this strategy.
Roth conversion ladders — converting traditional IRA or 401(k) balances to Roth in lower-income years (sabbatical, partial retirement, early career) — are another tool worth discussing with a CPA.
How S-Corp Structure Maximizes Retirement Savings
Your business structure determines how much you can contribute as the “employer.” This is where the S-Corp for doctors structure becomes especially valuable beyond its FICA savings.
In an S-Corp, you pay yourself a reasonable W-2 salary and take the rest as a distribution. The employer 401(k) contribution is based on that W-2 salary — up to 25%.
Example (2026 limits): – W-2 salary: $150,000 – Employee deferral: $24,500 (or $31,000 if 50+) – Employer contribution: $37,500 (25% of $150,000) – Total: $61,000 — within the $72,000 cap
If you increase the W-2 salary, the employer contribution ceiling rises with it. A $188,000 W-2 salary gets you to the full $72,000 cap ($48,000 employer + $24,000 employee). The S-Corp structure also creates the W-2 income required to establish a cash balance plan, compounding the tax benefit.
For more on how S-Corp elections work with physician tax planning, see our overview on medical practice deductions and QBI deduction for doctors.
When to Add More Complex Plans
Not every physician needs a cash balance plan. Here’s a simple decision framework:
Solo 401(k) only: You’re under 45, earning under $400,000, want minimal plan complexity, and the $72,000 cap is sufficient for now. This is the right starting point for most physicians in early practice.
Add a cash balance plan: You’re 45 or older, earning $400,000 or more consistently, you’ve maxed the solo 401(k), and you want to shelter an additional $100,000–$200,000 per year. You’re willing to commit to annual contributions for 5+ years.
Maximum deferral (defined benefit): You’re 55 or older with high, consistent income and want the maximum possible tax deferral before retirement. The benefit limit of $290,000 per year under IRC 415(b) is the ceiling, and actuarial calculations determine your annual required contribution.
In all cases: adding a defined benefit or cash balance plan requires coordination between your CPA and a qualified TPA or actuary. The plan must be established before December 31 — plan on starting conversations in September or October, not December.
SDO provides tax strategy and plan design. For investment selection and portfolio management, SDO works alongside your registered investment advisor.
Frequently Asked Questions
Can a physician employee (W-2 only) use a solo 401(k)?
No. A solo 401(k) requires self-employment income. If you’re a W-2 employee at a hospital or group practice with no separate 1099 or business income, you’re limited to whatever plan your employer offers. Physicians with a side practice, locum work, or consulting income can open a solo 401(k) for that income stream.
What retirement account is best for a physician just starting out?
For most new physicians with self-employment income and no employees, start with a solo 401(k). It offers the highest contribution limits with the least administrative overhead. If you’re over 50 and need to catch up aggressively, discuss adding a cash balance plan with a CPA once your income is stable.
Can I contribute to both a solo 401(k) and a defined benefit plan?
Yes. Stacking a solo 401(k) with a cash balance or defined benefit plan is the most common strategy for high-income physicians 45+. The defined benefit contribution is calculated separately from the 401(k), so you can potentially shelter $150,000–$290,000 combined per year. Both plans must be established before December 31.
Is a Roth or traditional 401(k) better for a high-income physician?
At a 37% marginal rate, the traditional (pre-tax) contribution typically wins — the tax deduction now is worth more than tax-free withdrawals later, assuming rates don’t change dramatically. The exception: if you expect a Roth conversion later at a lower rate, or if you’re using the mega backdoor Roth to move after-tax dollars into tax-free growth. Discuss your specific situation with a CPA; this isn’t a one-size answer.
Can my spouse contribute to my practice’s solo 401(k)?
Yes — if your spouse is a legitimate W-2 employee of your practice, they can participate in the plan and make their own employee deferral and employer contribution, up to the same annual limits. This can effectively double the household’s annual retirement contribution if your spouse works in the practice.
When do I have to set up a retirement account to use it for this tax year?
The plan document must be established by December 31 of the tax year. Contributions for that year can be made up to the tax filing deadline, including extensions (October 15 for most individual returns). SEP-IRAs are the exception — they can be established and funded up to the tax filing deadline, with no year-end requirement.
Build a Retirement Strategy That Matches Your Income
The gap between a physician who shelters $24,500 in a standard employer 401(k) and one who shelters $200,000 through a properly structured solo 401(k) plus cash balance plan is $176,500 per year in taxable income. At 37% federal, that’s $65,000 in federal tax alone — before state taxes.
Most physicians never get there, not because the accounts aren’t available, but because nobody put the pieces together early enough or structured the practice to support it.
SDO analyzes retirement plan options for physicians at every income level — from a solo practitioner maxing out a first-year 401(k) to a partner in a group practice adding a defined benefit plan at 50. For investment management and plan fund selection, SDO works alongside your financial advisor.
Schedule a consultation to assess your retirement plan options.
Contribution limits referenced in this article are 2026 figures, subject to annual IRS adjustment. Verify current limits at irs.gov or with your CPA before contributing. SDO CPA provides tax strategy; investment advice and plan fund selection require a registered investment advisor.