Evaluate employee costs, actuarial funding and cash-flow stress before combining plans. A hypothetical practice compares full funding with a weaker-profit year.
May 26, 2025 · Financial Forte Staff
Historical article: prepared retrospectively using information available as of May 26, 2025.
A profitable business owner may reach the limits of a 401(k) arrangement and wonder whether more retirement funding is possible. A cash balance plan can sometimes work alongside the existing plan, but the decision is larger than selecting a higher contribution amount.
Evaluate the two plans as an integrated commitment. A cash balance plan is a defined benefit pension plan, even though its benefits are presented using a hypothetical account balance. Its funding, employee coverage and administration differ from a defined contribution plan. The right analysis includes the workforce, actuarial assumptions, cash flow and the employer's willingness to maintain the arrangement.[1]
Understand what each plan is doing
A 401(k) arrangement can allow employee deferrals and employer contributions under its terms and applicable limits. A cash balance plan promises a benefit using a formula that typically includes pay credits and interest credits. The hypothetical balance is not simply an investment account in which each participant bears the market result.[1]
The employer is responsible for funding the defined benefit promise. Actuarial calculations determine required contributions and help establish deductible contribution ranges. Investment performance, compensation, participant ages and changes in the workforce can affect the results. A contribution illustration based only on the owner's age is not a reliable design study.[1][2]
When the plans operate together, the administrator and actuary need to consider coverage, nondiscrimination and the relevant deduction rules across the design. Related businesses and ownership relationships may affect which employees must be included. Separate company names do not automatically allow the owner to ignore another workforce.[2]
Read the whole cost illustration
A hypothetical professional practice is comparing its existing arrangement with a proposed combination. Assume the existing defined contribution plan is projected to receive $60,000 for owners and $40,000 for other employees, for a total of $100,000. These are aggregate employer contributions for the study, not individual statutory limits. Employee salary deferrals are excluded, so amounts already included in payroll are not counted again as new employer spending.
The hypothetical cash balance illustration adds $100,000 for owners and $30,000 for other employees. The additional pension funding is $130,000, bringing combined contributions to $230,000. Assume another $15,000 of incremental professional and administration costs for the combined proposal. The business would need $245,000 under those stated assumptions, $145,000 more than the illustrated existing $100,000 contribution commitment.
The owner should not describe this as a $100,000 decision simply because that is the additional amount attributed to owners. The proposed pension also requires the illustrated $30,000 for employees, plus the additional costs. All figures must be confirmed by the actual design study and funding calculation.
Suppose the practice expects $300,000 of cash available after operating expenses, taxes and other committed uses. The proposal would leave $55,000 under that projection. In a weaker year with only $150,000 available, the same illustrated $245,000 funding and cost amount would exceed available cash by $95,000.
That weaker-year comparison does not predict the actuary's actual future requirement. It shows why the owner needs stress scenarios before making a continuing benefit promise. A deductible contribution still requires cash, and the tax benefit does not eliminate the obligation to fund the plan appropriately.
Ask what happens when the business changes
Request more than a first-year contribution estimate. Ask the actuary to show how the design responds to lower investment returns, employee turnover, compensation changes and an owner's planned retirement. Identify the assumptions that most strongly influence future funding.
A business with volatile profits may need a different approach from one with dependable recurring revenue. Existing debt, expansion plans and a future ownership transition can also compete for the same cash. The retirement plan should be evaluated with those commitments, not in a separate financial presentation.
Ask about changes and termination before assuming the arrangement can be stopped whenever profits decline. Plan amendments, benefit accrual rules, required funding and termination procedures can constrain the timing and result. A plan intended to be permanent should not be adopted on the assumption that it is a one-year tax transaction.[2]
Also clarify which expenses are incremental. If the 401(k) already has an administration fee, the comparison should not count that existing fee twice. Conversely, leaving actuarial, legal or other new costs out of the proposal understates what the business must support.
Connect the employee benefit with the employer's oversight
Employees need a clear explanation of what the additional benefit means, how vesting works and where to obtain their information. A larger retirement benefit may support retention, but the effect depends on whether employees understand and value it. A complicated formula that no one can explain may receive less credit than its cost suggests.
For an ERISA-covered arrangement, fiduciary responsibilities include prudent administration and appropriate investment and provider oversight. The business decision to adopt a particular benefit design is distinct from the fiduciary work of operating the plan for participants. Hiring specialists does not eliminate the need to monitor their assigned work.[3]
Document who supplies the census, who approves funding, who monitors investments and who reconciles the actuary's requests with the company's cash forecast. Regular communication among the owner, CFO, CPA, actuary and administrator can reduce errors caused by inconsistent compensation or ownership data.
Before proceeding, ask for an integrated illustration, a multiyear cash-flow assessment and a written explanation of employee costs and responsibilities, with lower-profit and lower-return scenarios discussed together. A combined plan can be a useful tool when it fits the business. Its value comes from a sustainable benefit design, not simply the largest deduction shown on the first page.
Related reading
- When a Cash Balance Plan Deserves a Closer Look
- Cash Balance Funding: A Tax Deduction Is Only Part of the Decision
Have more questions about combined 401(k) and cash balance plan design? Email Dave at dave@financialforte.com to discuss your questions and next steps.
The contact invitation is current; it does not imply this contact path existed on the historical reference date.
Educational information, not personalized investment, tax, legal or benefits advice. Examples use hypothetical assumptions. Verify current rules and your circumstances before acting.
