How Can Business Owners Shelter $300K Per Year in Retirement Plans?

For high-income business owners, the question is not whether to use retirement plans for tax savings -- it is how to maximize the amount sheltered each year. Through strategic plan design, business owners can contribute $300,000 or more annually to tax-advantaged retirement accounts, generating immediate tax deductions while building substantial retirement wealth. The key is understanding how to stack multiple plan types together within IRS rules.

The Building Blocks

Sheltering $300,000 per year requires combining two types of retirement plans -- a defined contribution plan (typically a 401(k) with profit-sharing) and a defined benefit plan (typically a cash balance plan). Each plan type has its own contribution limits under different IRC sections, and the limits do not overlap. This is the legal foundation that makes the strategy work.

The 401(k) profit-sharing plan operates under the IRC Section 415(c) annual additions limit of $70,000 for 2026 (plus catch-up contributions for those 50 and older). This includes employee deferrals, employer matching, and profit-sharing contributions. The cash balance defined benefit plan operates under the IRC Section 415(b) benefit limit, with required annual contributions determined by an enrolled actuary. Because the two limits are separate, contributions to each plan are independently capped.

Step 1 -- Maximize the 401(k) Profit-Sharing Plan

Start with the full employee deferral of $23,500 (or $31,000 with the standard catch-up for age 50-plus, or $34,750 with the enhanced catch-up for ages 60-63). Then add the maximum employer profit-sharing contribution -- up to 25% of W-2 compensation for S-Corp owners or 20% of adjusted net self-employment income for sole proprietors. For a business owner paying themselves a W-2 salary of $200,000, the employer contribution is up to $50,000. Combined with the $23,500 employee deferral, the 401(k) produces approximately $70,000 to $77,500 in total contributions.

Step 2 -- Layer on a Cash Balance Plan

The cash balance plan is where the heavy lifting happens. Annual contributions to the cash balance plan are determined by the actuary and depend primarily on the participant's age and the plan's benefit formula. Typical annual contributions by age are approximately $80,000 to $120,000 for participants aged 40-45, $120,000 to $180,000 for participants aged 46-52, $180,000 to $250,000 for participants aged 53-58, and $250,000 to $350,000 for participants aged 59-65.

These are approximate ranges -- the actual contribution depends on the specific plan design, interest crediting rate, assumed retirement age, and the plan's investment performance. The actuary determines the required contribution each year and certifies it in the plan's annual actuarial valuation.

Combined Example -- Age 55 Business Owner

Consider a 55-year-old S-Corp owner with $500,000 in business income. The combined strategy might look like this. The 401(k) produces $31,000 in employee deferrals (including catch-up) plus $50,000 in employer profit-sharing contributions, totaling $81,000. The cash balance plan requires approximately $220,000 in employer contributions. The grand total is approximately $301,000 in tax-deductible retirement plan contributions.

At a combined federal and state tax rate of 40%, this produces approximately $120,000 in tax savings in a single year. Over a five-year period of consistent contributions, the cumulative tax savings can exceed $600,000 -- and the retirement account balances grow tax-deferred until distribution.

The Employer Deduction

All contributions to both plans are deductible by the business under IRC Sections 404(a)(1) (defined benefit plans) and 404(a)(3) (defined contribution plans). The combined deduction limit under IRC Section 404(a)(7) for an employer maintaining both plan types is the greater of 25% of compensation paid to all plan participants or the minimum required contribution to the defined benefit plan. Because the cash balance plan contribution is actuarially required, the deduction is virtually always available even when the total exceeds 25% of compensation.

Employee Coverage and Commitment

Both plans must satisfy coverage and nondiscrimination requirements under IRC Sections 410(b) and 401(a)(4). If you have employees, they must generally be included in both plans, though the actuary can design the plans to minimize employee costs through cross-testing and integrated benefit formulas. For solo practitioners with no employees, these concerns do not apply.

A strategy of this magnitude requires consistent cash flow and multi-year commitment. The cash balance plan mandates minimum annual contributions. Before implementing, stress-test your cash flow projections for at least five years. The plan can be terminated if business conditions change permanently, but early termination can trigger additional costs.

Sheltering $300,000 per year is achievable for business owners with consistent high income and the discipline to commit to multi-year plan funding. The cash balance plan guarantees a specific interest crediting rate to participants, so conservative investment allocations are common because the employer bears the risk of underperformance. The combination of a 401(k) profit-sharing plan and a cash balance defined benefit plan is the proven structure. Work with an enrolled actuary and a tax advisor experienced in advanced retirement plan design to build and maintain this strategy properly.

This article is for informational purposes only and does not constitute legal or tax advice. Consult a qualified tax professional regarding your specific circumstances. AE Tax Advisors, 935 Lake Elmo Dr, Suite B, Billings, MT 59105. Phone: (631) 614-5762.