Cash Balance Plans for High-Earning Professionals

For high-earning professionals over 45 — physicians, dentists, lawyers, consultants — a cash balance plan is the only legal way to defer more than the §415(c) cap into a single pre-tax retirement vehicle. Stacked with a 401(k) and profit-sharing plan, total annual deferrals can exceed $300,000 for an older participant.

What a cash balance plan is

A cash balance plan is a defined-benefit plan under IRC §401(a) that resembles a defined-contribution plan in presentation. The plan promises each participant an annual "pay credit" (often 5%–8% of compensation, or a flat dollar amount) plus an annual "interest credit" (typically tied to the 30-year Treasury rate or a fixed 4%–5%). The participant's account grows by these credits regardless of actual investment performance — the employer bears the investment risk and the funding obligation.

The contribution math

Cash balance contributions are calculated by an enrolled actuary to fund the promised benefit at retirement. The IRC §415(b) defined-benefit dollar limit caps the annual benefit at the lesser of (a) $280,000 for 2025 or (b) the participant's average compensation. Translating that benefit into a current-year contribution depends heavily on age — the older the participant, the larger the contribution required to fund the same future benefit.

Numbers vary with the plan's actuarial assumptions and interest crediting rate. They are illustrative — your actuary's calculation is what controls.

Stacking with a 401(k)

A cash balance plan is a separate plan from the 401(k); the §415(c) annual additions limit and the §415(b) benefit limit do not coordinate. A 55-year-old solo practitioner can therefore contribute:

• $23,500 employee deferral to the 401(k)
• $7,500 age-50 catch-up
• Employer profit-sharing contribution to the 401(k), capped at the §415(c) total of $70,000 (so up to $39,000 of profit sharing on top of the deferral)
• $200,000+ cash balance contribution

Total: $270,000+ of fully deductible retirement saving in a single year. The §404 deduction limit caps total deductions for the year to the greater of 6% of compensation plus the actuarial minimum for the cash balance plan, or 25% of compensation, but the math works for most professional-services businesses.

What it costs

Cash balance plans require an enrolled actuary annually. Typical fees: $2,500–$5,000 setup, $2,500–$5,000 annual administration. The plan must be funded each year regardless of business income — flexibility to skip a year is much narrower than in a 401(k). And the plan must satisfy nondiscrimination testing, which generally requires contributions of 5%–7.5% of pay to non-owner staff.

Who it actually fits

• Owner-only or owner-plus-spouse practices with consistent net income above $400,000.
• Small partnerships with two or three owners and few employees.
• Older owners (45+) who started saving late and want to close a retirement gap quickly.
• Practices in high-tax states where the federal-plus-state deduction is worth 45%+ on the marginal dollar.

It does not fit a sole proprietor with one $80,000 year and four $300,000 years — the funding obligation does not flex with revenue. It does not fit a young owner who can wait — the contribution at 30 is too small to justify the administrative cost.

Common mistakes

• Treating the cash balance as defined-contribution. The contribution is set by actuarial calculation, not by the owner's election. Underfunding triggers excise taxes under §4971.
• Forgetting the staff cost. A plan with eligible employees must pass nondiscrimination testing, which forces meaningful contributions to non-owner staff. Run that math before you sign up.
• Picking the wrong interest crediting rate. A high fixed rate sounds good but locks the plan into outsized funding obligations if investment returns disappoint. Most plans now use a market-rate index.
• Terminating prematurely. Cash balance plans should be designed to last at least 5 years; the IRS scrutinizes shorter-lived plans for "permanency" under Treas. Reg. §1.401-1(b)(2).

Sources

• Internal Revenue Code §415(b), defined-benefit dollar limit (Cornell LII): law.cornell.edu/uscode/text/26/415
• Internal Revenue Code §404(o), cash-balance deduction rules: law.cornell.edu/uscode/text/26/404
• IRS, "Cash Balance Pension Plans": irs.gov/retirement-plans/cash-balance-pension-plans
• U.S. Department of Labor, "Fact Sheet: Cash Balance Pension Plans": dol.gov/agencies/ebsa cash-balance fact sheet
• Treasury Regulation §1.411(b)(5), cash balance plan rules: law.cornell.edu/cfr/text/26/1.411(b)(5)-1
• IRS Notice 2024-80, 2025 §415(b) defined-benefit limit: irs.gov/pub/irs-drop/n-24-80.pdf

RetirementCheck101 flags cash-balance candidacy when your self-employment income and age make the math work. Explore the free educational tool.