Retirement Plan Design for Orthopedic Private Practice

A hospital-employed orthopedic surgeon can contribute $24,500 per year to a 403(b) — maybe $49,000 with a governmental 457(b). A private practice owner with a well-designed 401(k) + cash balance plan can shelter $200,000–$360,000 per year in pre-tax income at peak career. That gap is the single largest structural financial advantage of practice ownership, and it's entirely dependent on how your plan is designed.

Most orthopedic groups use an off-the-shelf 401(k) administered by their payroll provider. That's a plan. It is not an optimized plan. This guide explains what "optimized" means for high-income practice owners with employees, and what the trade-offs look like.

Plan type comparison

Four plan structures are commonly used by physician practices. The right one depends on staff headcount, turnover, owner age, and income level.

The SEP-IRA is often where early practice owners start — it's simple, flexible, and provides a meaningful deduction. But once a practice has multiple physician partners and/or grows past 5–10 staff, a properly designed 401(k) + profit sharing plan (with or without a cash balance plan layered on top) almost always produces a materially higher owner deduction for comparable or lower staff cost.

The staff coverage problem: IRC § 410(b)

Any qualified retirement plan — 401(k), profit sharing, or defined benefit — must satisfy IRS coverage testing under IRC § 410(b). The plan can't be structured to exclusively benefit the physician owners and exclude staff.

Two ways to pass:

1. Ratio test: The percentage of non-highly-compensated employees (NHCEs) benefiting from the plan must be at least 70% of the percentage of highly-compensated employees (HCEs) who benefit. For 2026, the HCE threshold is $160,000. All physician partners earning more than this are HCEs.
2. Average benefits test: A more flexible alternative that looks at overall benefit percentages. Requires actuarial work; used when a simple ratio test would fail.

In practice, most orthopedic groups with a 401(k) plan must offer the plan to eligible staff (those with ≥1,000 hours and ≥1 year of service). The plan doesn't have to give staff the same contribution — but it does have to give them something meaningful to satisfy ADP/ACP testing or else adopt a safe harbor structure.

The cost isn't as high as most practice owners fear. A staff nurse earning $70,000/year costs $2,100/year in a 3% safe harbor non-elective contribution. A front-office coordinator at $55,000/year costs $1,650/year. The question is whether the physician deduction increase justifies those staff contributions — and at $600K–$1.5M physician income, it almost always does.

Safe harbor 401(k): eliminate ADP/ACP testing

Standard 401(k) plans must pass annual ADP testing (employee deferrals) and ACP testing (employer match). If HCEs defer significantly more than NHCEs — which is typical when physicians max out and staff under-save — the plan fails and the physician contributions must be refunded or the employer must make additional contributions.

A safe harbor 401(k) eliminates this problem by committing to a minimum employer contribution structure up front. Three common safe harbor methods:

• Non-elective safe harbor: 3% of eligible compensation for all eligible employees, regardless of whether they defer. Simplest to explain to staff; guaranteed cost but no matching mechanics.
• Basic matching safe harbor: 100% of first 3% of deferrals + 50% of next 2%. Costs less if staff don't participate, but is more complex to communicate.
• Enhanced matching safe harbor: 100% of first 4% of deferrals. Higher cost but popular with staff; may improve recruitment.

Safe harbor status also satisfies the top-heavy minimum contribution requirement (see below) for the year the safe harbor contribution is made. For most orthopedic groups with a modest headcount of clinical and administrative staff, the non-elective 3% safe harbor is the workhorse choice: predictable cost, eliminates testing, and simplifies plan administration.

The power move: 401(k) + profit sharing + cash balance plan

The reason private practice partners in their 50s can sometimes shelter $300,000+ per year in pre-tax income is that the IRS permits a combination of a defined contribution plan (the 401(k) + profit sharing) and a defined benefit plan (the cash balance plan) operating simultaneously. The 415(c) cap applies to the DC plan; the 415(b) cap applies to the DB plan. Each plan has its own limit.

How the combination works in practice:

1. The 401(k) handles the employee deferral ($24,500–$35,750 depending on age).
2. The profit sharing contribution fills up to the 415(c) limit ($72,000 total per plan year per employee, including all employer + employee contributions).
3. The cash balance plan provides an additional, separate defined benefit contribution — funded by the employer — based on actuarially determined amounts. At age 55+, the annual cash balance contribution needed to fund the plan toward the § 415(b) limit ($290,000/year projected benefit at age 62) can exceed $200,000 per year per physician owner.

The plan requires an enrolled actuary, annual valuations, and PBGC flat-rate premiums ($111/participant for 2026 — Source: PBGC 2026 premium rates). But for a physician earning $700K–$1.5M who is 15–20 years from retirement, the tax math is compelling: saving $100,000/year in tax at a 37% federal rate plus state taxes pays for years of actuary fees within the first year.

One important constraint: if your practice has staff, the cash balance plan must cover enough of them to pass the IRC § 410(b) coverage test. Plan design typically uses a separate benefit formula or a much lower cash balance contribution for staff, which satisfies coverage while keeping the staff cost proportionate.

2026 maximum annual contributions by age — physician owner

Cash balance amounts are illustrative. Actual actuarially determined amounts vary by plan entry age, assumed interest crediting rate, and targeted retirement age. Work with an enrolled actuary for personalized projections.

For comparison: a hospital-employed orthopedic surgeon can contribute $24,500 to their 403(b) plus $24,500 to a governmental 457(b) — a total of $49,000 per year. A private practice physician at age 58 with a well-designed combination plan can contribute $270,000+ per year. Over a 15-year career, that gap in tax-advantaged contributions compounds into a multimillion-dollar difference in retirement wealth.

For detailed modeling of how this stacks against your specific income and timeline, see Retirement Planning for Orthopedic Surgeons and the Cash Balance Plan deep-dive.

Top-heavy plan rules: IRC § 416

A plan is "top-heavy" when more than 60% of the plan's accumulated benefits or account balances belong to "key employees" (owners and officers earning more than $230,000 in 2026). Most physician group plans with a handful of owners and modest staff will be top-heavy.

When a plan is top-heavy, the employer must make a minimum contribution of 3% of compensation for each non-key employee who is employed at year-end. This requirement is separate from — and in addition to — the profit sharing contribution. However:

• If the practice has a safe harbor 401(k), the safe harbor non-elective contribution (3%) satisfies the top-heavy minimum for that plan year.
• If the plan has a discretionary profit sharing contribution that already delivers ≥3% to non-key employees, that satisfies the top-heavy minimum.

In practice, most orthopedic group plans with a safe harbor design are automatically exempt from the top-heavy minimum for the year the safe harbor contribution is made — eliminating one more compliance complexity.

Key plan design and funding deadlines

The December 31 deadline for adopting a cash balance plan is the most commonly missed. Many practice owners decide in October or November that they want to add a cash balance plan — and it's entirely doable before year-end, but the actuary and TPA need lead time to draft plan documents. Waiting until December creates unnecessary risk. If you're considering adding a defined benefit plan for this tax year, start the process in September or October.

Work with an advisor who knows physician plan design

Most financial advisors understand personal retirement planning — maxing out a 401(k), doing backdoor Roth, building an investment portfolio. Fewer have meaningful experience with the interplay of defined contribution and defined benefit plans in a physician practice context: IRC § 410(b) coverage testing, actuarial coordination, reasonable compensation in an S-Corp paired with a cash balance plan, PBGC premium management, and plan design that balances physician contribution maximization against staff cost.

If you're a practice owner or are considering starting one, a fee-only financial advisor who specializes in physician practices can model your specific situation — income, age, number of physicians, headcount of staff, state tax rate — and show you the actual numbers before you commit to a plan design. The difference between a generic plan and an optimized one can easily be $50,000–$150,000 per year in additional tax deductions.