The Physician Account Stack: 403(b), 457(b), Cash Balance Plans, and HSAs Explained

A physician in their mid-50s earning $400,000 annually could shelter more than $300,000 of it from federal taxes this year. 

While that number is lower for hospital-employed physicians (closer to $85,000), it’s still far above what many are sheltering — a 403(b) or 401(k) alone maxes out at $24,500 ($32,500 with catch-up contributions; $35,750 with super catch-up contributions) in 2026.

Considering physicians have a retirement savings window of fifteen to twenty years instead of forty, every year of underutilization in peak earning years has a two-fold cost — less sheltered now, less compounding later. The accounts available to physicians during this window are among the most powerful in the tax code. This is a guide to what they are and how they work together.

Your Stack Depends on How You Practice

Hospital-employed physicians have access to a different set of accounts than those in private practice or running their own groups, and the contribution limits, withdrawal rules, and strategic priorities differ significantly between the two. 

The accounts that make a private practice physician’s stack extraordinary (the Solo 401(k), the cash balance plan) aren’t available to employed physicians. And the account that makes the hospital-employed stack uniquely beneficial for early retirement (the 457(b)) isn’t available to those in private practice.

The Hospital-Employed Physician Stack

403(b): The Foundation

The 403(b) is the nonprofit hospital equivalent of a 401(k) — the foundational account for many employed physicians. Contributions reduce taxable income dollar for dollar, and assets grow tax-deferred until withdrawal.

The 2026 employee contribution limit is $24,500, plus an $8,000 catch-up contribution for physicians aged 50 and older. Physicians aged 60–63 have access to an enhanced catch-up of $11,250. Many employers add matching contributions (e.g., 3–5% of salary) on top of the employee deferral. Those employer contributions may be subject to a vesting schedule, meaning physicians who leave before the schedule completes forfeit some or all of the unvested balance.

Some hospital plans offer a Roth 403(b) option, which accepts after-tax contributions in exchange for tax-free growth and withdrawals. If you’re earlier in your career and expect to be in a higher bracket later, the Roth option can be valuable. If you’re in the 32–37% federal bracket during peak earning years, the pre-tax traditional 403(b) delivers more immediate value through current-year tax reduction.

457(b): The Early Retirement Bridge

The 457(b) is available at many nonprofit hospitals and has a separate contribution limit — entirely independent of the 403(b). Physicians with access to both can contribute the maximum to each simultaneously.

The 2026 contribution limit mirrors the 403(b): $24,500 employee contribution, plus $8,000 catch-up for those 50 and older (or $11,250 with the super-catch up if you’re 60–63). If you’re in your mid-50s maxing both accounts, that’s $65,000 in annual tax-deferred contributions before employer matching, backdoor Roth IRA, or HSA contributions are added.

Unlike the 403(b), the 457(b) doesn’t have a 10% early withdrawal penalty upon separation from service. Distributions can begin immediately once you leave your employer, regardless of age. So, if you retire at 58, you could draw from the 457(b) to fund living expenses without restriction, while 403(b) and IRA withdrawals before 59½ would normally trigger a penalty.

For any physician who may exit medicine before 59½ (due to burnout, health issues, or whatever reason), the 457(b) is the primary early retirement bridge. 

One important wrinkle to understand before relying on this account, though, is that governmental 457(b) plans are backed by the government, providing strong security. Non-governmental plans are backed by the employer and subject to employer creditor claims in the event of financial difficulty. 

Example hospital-employed stack (physician age 50-59):

• 403(b): $32,500
• 457(b): $32,500
• Backdoor Roth IRA: $8,600
• HSA (family): $9,750 with catch-up contribution
• Total: $83,350 annually in tax-advantaged savings

The Private Practice Physician Stack

Solo 401(k): Higher Limits, More Control

If you’re self-employed and have 1099 income, the Solo 401(k) provides both employee and employer contribution capacity within a single plan.

The employee deferral follows the same limit as a 403(b): $24,500 in 2026, plus catch-up contributions. The employer contribution (funded as the business owner) adds up to 25% of compensation. The combined employee and employer limit reaches $72,000 in 2026, increasing to $80,000 for ages 50–59 and $83,250 for ages 60–63 with enhanced catch-up provisions.

If you’re operating through an S-Corp, the compensation base used to calculate the 25% employer contribution is W-2 wages paid by the corporation — not total business revenue. Note that underpaying W-2 wages to reduce payroll taxes also reduces the employer contribution ceiling. Employment contracts and business structure both affect what’s achievable under the Solo 401(k).

SEP IRA: Simpler but Less Powerful

The SEP IRA allows employer contributions of up to 25% of compensation, with a maximum of $72,000 in 2026. It requires no actuarial setup, has straightforward administration, and is often used by locum tenens physicians or those with variable 1099 income who prioritize simplicity.

The limitation is that SEP IRAs accept only employer contributions. There’s no employee deferral component, which means physicians with high incomes can’t use salary deferrals to reduce taxable income the way a Solo 401(k) allows. 

Cash Balance Plan: The Catch-Up Tool for High Earners

If you own a private practice, the cash balance plan opens the door to accelerated savings.

A cash balance plan is a type of defined benefit plan that promises a specific benefit at retirement. Unlike a Solo 401(k) where the physician owns an account balance that fluctuates with the market, the cash balance plan specifies the benefit and requires annual contributions to fund it actuarially. The employer (in private practice, the physician) contributes the amount determined each year to meet the plan’s obligation.

Cash balance plan contribution limits are age-dependent and increase substantially as retirement approaches. A physician in their early 50s might shelter $150,000 annually through a cash balance plan. A physician in their late 50s or early 60s can potentially contribute $250,000–$300,000 or more. These figures dwarf any defined contribution plan available.

The trade-off is commitment. Cash balance plans require actuarial setup, annual administrative oversight, and consistent contributions as long as the plan remains active. They work best for practices with stable, predictable revenue.

Paired with a Solo 401(k), a physician in their late 50s running a profitable private practice can potentially shelter $300,000 or more annually in tax-advantaged accounts. 

Universal Accounts: What You Can Access Regardless of How You Practice

Backdoor Roth IRA

Physicians typically exceed the income thresholds for direct Roth IRA contributions — for married filing jointly in 2026, the phase-out begins at $242,000 and contributions are eliminated above $252,000. 

The backdoor route bypasses this limitation: contribute to a traditional IRA (non-deductible), then immediately convert to a Roth IRA. No income limit applies to conversions. The 2026 limits are $7,500 per person ($8,600 if age 50 or older). 

One technical nuance to understand first: the pro-rata rule. If a physician has existing pre-tax traditional IRA balances, the IRS treats all IRA assets as a single pool for conversion purposes, which can create unexpected tax liability on what was intended to be a non-deductible contribution. 

Let’s say a physician has $90,000 in a traditional IRA from a previous employer rollover, and contributes $7,500 non-deductibly intending to convert it to Roth. The IRS sees the total IRA pool as $97,500. Since only $7,500 (about 7.7%) is non-deductible, only 7.7% of the conversion is tax-free. The remaining $6,923 is taxable as ordinary income. If you have existing IRA balances, you should model the pro-rata calculation before proceeding. In many cases, rolling those balances into an employer 403(b) or 401(k) resolves the issue. 

While the annual contribution is modest relative to other accounts in the stack, consistent backdoor Roth contributions over 20 years can compound into a material tax-free balance that is not bound by required minimum distributions and passes to heirs without income tax liability.

Health Savings Account

The HSA requires enrollment in a high-deductible health plan. For those who qualify, the triple tax advantage is unmatched: contributions are tax-deductible, growth is tax-free, and withdrawals for qualified medical expenses are tax-free. The 2026 limits are $4,400 for self-only coverage and $8,750 for a family plan, plus a $1,000 catch-up contribution for those 55 and older.

An overlooked retirement strategy is to invest HSA funds for long-term growth instead of spending them on current medical costs. In other words, you could pay out-of-pocket expenses directly, save the receipts, and let the HSA balance compound tax-free for decades. In retirement, those receipts can be reimbursed tax-free at any time — there’s no deadline on medical expense reimbursement from an HSA. After age 65, HSA funds can be withdrawn for any purpose, taxed as ordinary income like a traditional IRA, but with no required minimum distributions.

A physician who consistently maxes the HSA from age 45 through 65 and invests the balance in low-cost index funds could accumulate a substantial tax-free asset that functions as a supplemental retirement account — one with no RMDs and no income tax on qualified medical withdrawals.

Taxable Brokerage Account

While not tax-advantaged, it’s essential for any physician planning to retire before 59½.

Taxable brokerage accounts have no contribution limits, no early withdrawal penalties, and no required minimum distributions. Long-term capital gains are taxed at preferential rates (0–20%) instead of ordinary income rates. And they’re readily accessible.

Three Costly Mistakes to Avoid

Ignoring the 457(b). If you’re a hospital-employed physician, the 457(b) offers a full additional contribution tier on top of the 403(b) — and is the only account that allows penalty-free access before 59½. Physicians who skip it not only leave tax deferral on the table but also forfeit a useful early retirement bridge.

Keeping your HSA balance in cash. According to PSCA’s 2025 HSA Survey, only 20% of HSA participants are investing their savings. That means 80% are holding their entire balance in cash, missing out on any tax-free compounding. A more effective structure is to keep a liquid portion available for expected near-term medical costs while investing the remainder for potential long-term growth. 

Never exploring cash balance plans in private practice. Physicians running profitable practices frequently don’t realize they can shelter $200,000 or more annually through a cash balance plan. The actuarial setup creates a perception of complexity (and there is an administrative cost). But the cost of not setting one up can be far greater than the cost of administering one, in the right circumstances.

The Stack Only Works If You Build It

Physician retirement planning is complicated because the right account structure depends on how you practice, how close you are to retirement, and whether an early exit is a realistic possibility. These variables don’t coordinate themselves.

At Pine Grove Financial Group, we help physicians identify which accounts they have access to, prioritize contributions during peak earning years, and build a withdrawal strategy that accounts for the full stack. Schedule a free consultation to review your account structure.