Cash Balance Plan

A cash balance plan is a defined benefit plan in which each participant's promised benefit is stated as a hypothetical account balance rather than as a monthly income figure. The Department of Labor's Employee Benefits Security Administration describes it as "a form of defined benefit plan that provides participants with a hypothetical account balance," and the IRS as "a type of defined benefit plan that includes some elements that are similar to a defined contribution plan." The tax code's own term for the category is a statutory hybrid plan, at IRC §411(a)(13) and §411(b)(5).

The balance grows two ways each year. A pay credit adds a stated amount — often a percentage of compensation, or a flat dollar figure — and an interest credit adds a stated rate of return. Both are set by the plan document. At retirement the participant can typically take the balance as a lump sum or convert it to an annuity, which is why the plan feels like a defined contribution arrangement on the way out even though it never was one.

"Hypothetical" is precise, not a hedge, and this is the point consumer content most often gets wrong. There is no individual account holding the participant's money. Plan assets are pooled and invested for the plan as a whole by the employer or its fiduciaries; the participant cannot direct investments and does not receive the portfolio's actual return. The interest credit is a promise from the employer. If the plan's investments earn less than the credited rate, the employer must contribute the difference; if they earn more, the surplus reduces future employer contributions rather than enlarging anyone's balance. That is the definition of the employer bearing investment risk, and it is what makes this a defined benefit plan despite appearances. The broader defined benefit category — formula-based promises, actuarial funding, the contrast with defined contribution plans — belongs to defined benefit plan.

Two rules constrain the interest credit. It cannot exceed a market rate of return under IRC §411(b)(5)(B)(i), so a plan cannot promise an implausibly generous rate in order to inflate deductible contributions. And a preservation-of-capital rule requires that cumulative interest credits over a participant's period of participation cannot be negative — so even a plan whose credit is tied to an investment return cannot leave the benefit below the sum of the pay credits made. Some plans credit a fixed rate, others tie the credit to a Treasury yield or to the plan's actual return within these limits.

Funding and administration are defined benefit work. The plan requires an enrolled actuary to certify funding each year, is subject to minimum funding standards, and must offer the benefit in an annuity form — lump sums are typically available as an alternative. Contributions are not discretionary, which is the trade for the deduction. Because the required contribution is the amount actuarially needed to fund a target benefit over the years remaining until retirement, it rises sharply with age: a 58-year-old owner can be funded far more heavily than a 30-year-old employee for the same targeted benefit, simply because there are fewer years left to fund it. There is no published "maximum contribution" table for this — the figure is actuarial. The separate §415(b) cap on the maximum annual benefit a defined benefit plan may pay is $290,000 for 2026.

The combination-plan trap, which lands on exactly this design's audience. Owners typically run a cash balance plan alongside a 401(k) and a profit-sharing plan. IRC §404(a)(7) imposes a combined deduction limit when an employer maintains both a defined benefit and a defined contribution plan covering common participants — but only when the defined benefit plan is not covered by the Pension Benefit Guaranty Corporation. If the plan is PBGC-covered, each plan keeps its own deduction limit and there is no combined cap. If it is PBGC-exempt, employer defined contribution contributions — match, safe harbor, and profit sharing, excluding employee deferrals — must stay within 6% of participant compensation, or the combined deduction limit of 31% applies. The sting is which plans are exempt: under ERISA §4021, professional service employers — physicians, dentists, attorneys, accountants and similar — with 25 or fewer active participants at all times are outside PBGC coverage, and that is precisely the market where cash balance plans are sold. So the widely repeated "6% profit-sharing cap" is really a rule about PBGC coverage, and the exemption is lost permanently once the plan has ever exceeded 25 active participants.

The design is live and growing. Most defined benefit plans in the United States are now cash balance plans, and the large majority of those are sponsored by very small employers. Their legal footing was settled by the Pension Protection Act of 2006, which created an age-discrimination safe harbor for hybrid designs and ended the litigation era that had clouded them from the late 1990s.

Each year the plan credits every participant with a pay credit and an interest credit, the actuary calculates what the employer must contribute to fund those promises, and the employer funds it. At separation or retirement the participant takes the hypothetical balance as a lump sum or an annuity.

A hypothetical example. A plan credits 8% of pay plus a 4% annual interest credit. Dr. Reyes earns $200,000 and enters the year with a hypothetical balance of $300,000. Her pay credit is 8% × $200,000 = $16,000. Her interest credit is 4% × $300,000 = $12,000. Her balance ends the year at 300,000 + 16,000 + 12,000 = $328,000.

Here is the part that reveals it is a defined benefit plan. Suppose the plan's actual investments returned 1% that year, or lost 5%. Her balance still grew by exactly $28,000, because the credits are what the plan promised — and the shortfall between the promised credits and the actual return becomes an additional funding obligation for the employer, calculated by the actuary. She did not choose the investments, does not see the actual return, and does not benefit if the portfolio beats 4%. Figures are illustrative.

Pros

• Allows much larger deductible employer contributions for older participants than any defined contribution plan, because the funding is actuarial rather than capped by a flat annual limit.
• The participant's balance is insulated from market losses; the employer absorbs them.
• Benefits are easy to understand and communicate compared with a traditional final-average-pay formula.
• Lump sums are usually available at separation, which makes the benefit portable in a way most pensions are not.
• Generally carries Pension Benefit Guaranty Corporation insurance, unlike a defined contribution plan.

Cons

• Contributions are required, not discretionary, and the amount is set by an actuary rather than by the employer's cash position.
• Costs more to run — actuarial certification, annual filings, and specialist administration.
• Participants cannot direct investments and get no upside when the portfolio outperforms the interest credit.
• Employer contributions for non-owner employees are the price of the owner's deduction, so the design only works where the employer accepts that cost.
• Pairing with a 401(k) can trigger a combined deduction limit for PBGC-exempt plans, and small professional practices are the ones most likely to be exempt.