Cash Balance Plans for Business Owners

A cash balance plan is a defined benefit plan that looks and feels like a 401(k) from the participant's side: each person has a hypothetical "account" that grows by an annual pay credit (a set dollar amount or percentage of pay) plus an interest credit (a guaranteed rate defined in the plan). Unlike a 401(k), the employer funds it, and the contribution amounts are set by an actuary to fund a future benefit.

Because the contribution is based on funding a retirement benefit rather than a flat annual limit, an older, highly compensated owner can contribute dramatically more than the 401(k) limit — money that is generally tax-deductible to the business.

Cash balance plans fit consistently profitable businesses whose owners want to contribute well beyond 401(k) limits and reduce current taxable income. The strongest candidates are typically owners with income comfortably into the $200,000+ range, who are often 40+ (older owners can contribute the most), and who have stable, recurring profits to support required annual contributions.

Common profiles: physicians, dentists, attorneys, consultants, and other professional-practice and S-corp owners — especially those who are behind on retirement savings and want to catch up quickly.

Contribution amounts depend on your age, compensation, and plan design, and the IRS sets the maximums each year. As a rough guide, annual cash balance contributions commonly range from roughly $100,000 for younger owners to $300,000 and beyond for owners in their late 50s and 60s — on top of what you put into a 401(k).

For 2026, the IRS caps the annual benefit a defined benefit plan can fund at $290,000 (IRC 415(b)) and the compensation that can be counted at $360,000 (IRC 401(a)(17)) — see the limits table above. A plan actuary translates those rules into your specific maximum deductible contribution.

Paired with a 401(k) and profit-sharing plan, total annual tax-deductible retirement contributions for an older owner can approach or exceed $400,000. Your exact number is actuarially determined — model it with the calculator rather than relying on a single headline figure.

Every cash balance plan promises an interest credit on each participant's hypothetical account, and the plan document must name the rate. The rules allow three broad choices: a fixed rate (commonly 4–5%), a market index such as the 30-year Treasury yield, or a market-rate design that credits the trust's actual investment return, subject to 26 CFR 1.411(b)(5)-1, which caps what a plan may promise and requires a preservation-of-capital floor so that a participant's account never falls below the sum of the pay credits made for them.

The choice matters more than it looks, because the interest credit is a promise while the trust's investments are not. A fixed 5% credit with a trust earning 9% for three years leaves the plan holding more than its promises require, which shrinks the required contribution toward zero; that is how a plan overfunds. A market-rate credit ties the promise to the actual return, which removes most overfunding risk but makes each participant's account move with the market. Most small owner plans choose a fixed or Treasury-linked rate and invest conservatively around it; the guide to overfunded plans covers what to do when the two drift apart.

A cash balance plan that performs better than its guaranteed interest credit can become overfunded, which can erase your tax deduction and set up punitive reversion taxes at termination. This is a good problem caused by success, but it must be managed. Strategies (sometimes called "pension rescue," including IRC 412(e)(3) approaches) can help reposition an overfunded plan and protect the deduction. If your plan has overperformed, address it before year-end.