Cash Balance Plan vs. 401(k): Which One Actually Fits

Contribution ceiling

The 401(k) plus profit sharing world tops out at $72,000 in total additions for 2026 ($80,000 with catch-up). A cash balance plan commonly funds $100,000 to well over $300,000 depending on age. If your income is well past what a 401(k) can shelter, the 401(k) is not the tool doing the heavy lifting.

Flexibility versus obligation

This is the real trade. A 401(k) contribution is discretionary — a bad year simply means a smaller contribution. A cash balance contribution is largely required once the plan document exists, because you are funding a promise. Underfunding triggers excise tax exposure.

The practical answer is design, not avoidance: a plan can be written with a funding range rather than one number, and can be frozen if the business changes materially.

Administration

• 401(k): recordkeeper, annual testing, Form 5500 for larger plans.
• Cash balance: an enrolled actuary, an annual actuarial valuation, Form 5500 with Schedule SB, and a formal funding policy.
• Owner-only plans skip most of the cost: no coverage testing across staff, and generally exempt from PBGC coverage and premiums.

Investment risk sits in a different place

In a 401(k), market performance is your gain or loss. In a cash balance plan, the participant is credited a stated interest rate written into the document, and the employer absorbs the gap between actual returns and the crediting rate. Strong markets do not make the plan more generous — they shrink next year's required contribution and, taken too far, overfund the plan and erase the deduction entirely.

Creditor protection

Both are ERISA-qualified plans, which puts assets under federal anti-alienation protection rather than the patchwork of state exemptions that governs IRAs. For physicians, attorneys, and other liability-exposed professionals, this is often the second reason to adopt a plan, not an afterthought.

Who should run both

The profile is consistent: consistently profitable business, owner income comfortably into the $200,000-plus range, typically age 40 and up, and a real preference for deferring tax now. The 401(k) handles the first $72,000 with total flexibility; the cash balance plan handles everything above it with far more power and far more commitment.