For high-earning business owners who have maximized their 401(k) contributions and still want to accelerate retirement savings, a combination plan strategy may be worth exploring. Pairing a 401(k) — including a profit sharing component — with a defined benefit (DB) plan can dramatically increase the amount a business owner can set aside on a tax-deferred basis each year. This approach is not new, but it remains underutilized, often because advisors and owners are unfamiliar with how the two plan types work together.
How the Two Plan Types Complement Each Other
A 401(k) with profit sharing allows contributions up to the annual limits set by the IRS — in 2025, that figure is $70,000 per participant (or $77,500 for those age 50 and older, including the catch-up contribution). A defined benefit plan, on the other hand, funds a promised retirement benefit calculated on factors such as age, compensation, and years of service. The IRS limits on DB plans are based on the projected benefit, not a flat contribution ceiling, and the actuarially determined funding requirements can allow substantially larger annual contributions — particularly for older business owners with fewer years until retirement.
When the two plan types are combined, the contribution limits are not simply added together without consideration. The IRS imposes combined plan testing rules, historically referenced under the Section 415 limitations and plan coordination requirements. Working with an actuary and a qualified plan consultant is essential to structure the combination correctly and remain compliant.
Who Tends to Benefit Most
Combo plan strategies are not a fit for every business. The structure tends to work best in specific situations:
- Older owners with shorter time horizons: Because defined benefit plan contributions are actuarially calculated, older owners can often contribute significantly more in a shorter period to fund the promised benefit.
- High-income professionals and closely held businesses: Physicians, attorneys, consultants, and other professionals with relatively stable, high income and a small, predictable workforce are frequent candidates.
- Owners who have maximized 401(k) contributions and still have tax exposure: The additional deductible contributions from a DB plan can meaningfully reduce taxable income.
- Businesses with a favorable employee demographic: When employees are younger than the owner, the funding requirement for employee benefits is lower, improving the economics of the combined structure.
Key Design and Compliance Considerations
Running two qualified plans simultaneously introduces meaningful administrative complexity. Business owners and their advisors should be aware of several important considerations:
- Annual actuarial valuation: Defined benefit plans require an enrolled actuary to certify the plan’s funding status and calculate required contributions each year.
- Mandatory funding: Unlike a profit sharing plan where contributions are discretionary, DB plans carry funding obligations. If business income is inconsistent, the required contribution can create cash flow pressure.
- PBGC coverage: Most defined benefit plans are covered by the Pension Benefit Guaranty Corporation, which requires annual premium payments and carries regulatory obligations.
- Nondiscrimination testing: Both plans must independently satisfy IRS nondiscrimination requirements, and the combination must be evaluated holistically under cross-testing rules.
- Plan termination complexity: Ending a defined benefit plan is more involved than terminating a 401(k), requiring regulatory filings and often a distribution process that must be carefully managed.
The Role of the Advisory Team
A combo plan strategy is not a do-it-yourself project. It requires close coordination among a qualified plan consultant, an enrolled actuary, a CPA, and ideally an investment advisor familiar with fiduciary obligations under ERISA. Each professional plays a distinct role in the design, implementation, and ongoing administration of the combined structure. When the team works together, the strategy can be both highly effective and fully compliant.
Key Takeaway: Pairing a 401(k) with a defined benefit plan can be a powerful tool for business owners who want to maximize tax-deferred retirement savings — but it requires careful design, ongoing administration, and a coordinated advisory team. Understanding the mechanics and obligations before committing to the structure is essential to making it work.
This article is for informational purposes only and does not constitute legal, tax, or investment advice. Readers should consult with their qualified financial, legal, and tax professionals before making any financial or business decisions.
About the Author: Allen Bronton, AIF®, PPC®, is the founder of Clear Financial Strategies and author of ERISA Fiduciary Responsibility: The Good, the Bad, and the Ugly. Allen has been recognized as a ★ 2026 Five Star Wealth Manager — Five Star Professional in both Chicago, IL and Jacksonville, FL. The 2026 Five Star Wealth Manager award is based on 10 objective eligibility and evaluation criteria, including client retention rates, client assets administered, and a favorable regulatory history. Advisors do not pay a fee to be considered or placed on the final list, although they may choose to purchase advertising packages after being selected. The rating is not indicative of future performance or success and should not be construed as an endorsement by any client or by Five Star Professional. More information about the selection criteria is available at www.fivestarprofessional.com.
