The Retirement Plan That Lets Business Owners Contribute Over $200,000 a Year and Most Accountants Never Mention

A 58-year-old physician running a solo practice can legally shelter $374,000 from federal income taxes this year by combining a cash balance plan with a 401(k). Most accountants know about the 401(k). Few bring up the cash balance plan sitting right next to it.

A cash balance plan is a defined benefit pension plan that expresses the benefit as a hypothetical account balance rather than a monthly annuity. The IRS treats it as a pension, which means contribution limits far exceed any defined contribution vehicle. For 2026, the lifetime cap on a cash balance plan is $3.7 million, and the IRS compensation limit used in calculations is $360,000.

How the contribution limits actually work

A cash balance plan does not set a fixed annual contribution limit. Instead, an actuary calculates how much the employer must contribute each year to reach a target benefit at retirement, typically assumed at age 62. Because older owners have fewer years to fund that target, their required annual contributions are larger. That age-weighting makes this plan powerful for business owners in their 50s and 60s.

Here are the 2026 numbers at key ages, combining the cash balance plan with a 401(k) deferral and profit sharing:

1. Age 50: $197,000 cash balance contribution, plus $32,500 401(k) deferral, plus $47,500 profit sharing, for a combined total of $277,000.
2. Age 55: $253,000 cash balance, plus $32,500 deferral, plus $47,500 profit sharing, for a total of $333,000.
3. Age 58: $294,000 cash balance, plus $32,500 deferral, plus $47,500 profit sharing, for a total of $374,000.
4. Age 62: $359,000 cash balance, plus $35,750 deferral (the secure 2.0 super catch-up applies at ages 60 to 63), plus $47,500 profit sharing, for a combined total of $442,250.

Every dollar contributed is tax-deductible to the business. For a business owner in the 37% federal bracket, a $300,000 contribution generates roughly $111,000 in immediate federal tax savings, not counting state income taxes.

What you can invest in

Plan assets are held in a trust, and the trustee (typically the business owner) controls investment decisions. Permissible investments include U.S. Treasury bonds, mutual funds, ETFs, individual equities, and fixed income securities.

The plan is designed around an assumed interest crediting rate, typically 4% to 5% annually. If the trust earns more than the assumed rate, future required contributions decrease. If it earns less, the employer must contribute more to stay funded. With the 10-year Treasury yield near 4.3%, a conservatively invested plan holding treasuries can closely match the assumed crediting rate, minimizing contribution volatility. An equity-heavy portfolio introduces the risk of actuarial losses that drive up mandatory contributions in down years.

The risks you need to understand

The employer bears all investment risk. If the plan’s assets underperform the assumed crediting rate, the business must make up the shortfall through higher contributions. This is mandatory. The IRS requires minimum funding, and underfunding triggers excise taxes.

Three other risks deserve attention before signing the adoption agreement:

1. Plan permanency requirements. The IRS expects cash balance plans to be maintained indefinitely. Terminating a plan within a few years after large contributions can draw scrutiny. Business owners who anticipate selling or winding down within three to five years should model the exit scenario with their actuary before setup.
2. Employee coverage obligations. If the business has employees, the plan may need to cover them under non-discrimination rules, increasing the employer’s funding obligation. This plan works best for solo practitioners or small firms with few or no rank-and-file employees.
3. Contribution inflexibility. Unlike a 401(k), the cash balance plan has a minimum required contribution in most years. A business owner with a bad revenue year still owes money to the plan. Building a cash reserve to cover minimum contributions in lean years is essential.

Who this plan is built for

The cash balance plan is purpose-built for high-income self-employed individuals and small business owners who are 50 or older, earning consistently above $200,000, and have stable cash flow to meet minimum funding requirements. Corporate profits grew nearly 10% year-over-year as of Q4 2025, meaning many business owners have income that a standard 401(k) cannot shelter. Physicians, attorneys, consultants, and financial professionals with established practices are the core users.

A 58-year-old contributing $374,000 annually for four years shelters nearly $1.5 million from ordinary income before touching the lifetime cap. No other qualified plan structure available to a self-employed individual comes close.