Managing Cash Balance Plans Alongside 401(k): Dual Plan Best Practices

For many business owners and professional firms, offering a single retirement plan isn’t always enough to achieve the dual goals of attracting top talent and maximizing tax efficiency. Increasingly, employers are turning to a combination of a traditional 401(k) and a cash balance plan. Together, these two plans provide both flexibility and powerful retirement savings opportunities.

At LSC Financial, we specialize in guiding employers through the complexities of managing cash balance plans alongside 401(k) plans, ensuring compliance, maximizing contributions, and delivering meaningful retirement benefits to participants.

What Is a Cash Balance Plan?

A cash balance plan is a type of defined benefit pension plan that looks and feels like a defined contribution plan. Instead of promising a fixed payout in retirement, it credits each participant’s account with:

An annual pay credit (a percentage of salary or a flat dollar amount).
An interest credit, typically based on a fixed rate or a variable rate tied to an index.

Unlike a 401(k), contributions are made primarily by the employer, and the funding amounts are generally much higher—making it a powerful tool for owners and highly compensated employees who want to save more than the IRS contribution limits allow under 401(k) plans.

Why Combine Cash Balance Plans and 401(k) Plans?

While each plan has unique benefits, together they create a robust retirement strategy. Employers choose to combine them to:

Maximize Retirement Savings: High earners can contribute far beyond the $69,000 annual limit (2024) of a 401(k). In many cases, combined contributions can exceed $200,000 annually for older participants.
Reduce Taxes: Larger employer contributions are tax-deductible, lowering current-year taxable income for the business.
Attract and Retain Talent: Dual plans provide a competitive edge in industries where retirement benefits are key to recruiting.
Diversify Benefits: While a 401(k) offers investment flexibility, a cash balance plan provides predictable retirement credits.

Key Challenges in Managing Dual Plans

Running two retirement plans isn’t as simple as stacking one on top of the other. Employers must carefully navigate:

Compliance with IRS and ERISA rules – Each plan type has specific testing requirements to ensure fairness for all employees.
Funding obligations – Cash balance plans require annual employer contributions, even in years when profits decline.
Plan design coordination – Both plans must be designed together to maximize benefits without failing nondiscrimination tests.
Administrative complexity – Dual plans require actuaries, third-party administrators (TPAs), and often financial advisors to keep operations running smoothly.

This is where LSC Financial helps employers avoid costly missteps.

Best Practices for Managing Cash Balance Plans Alongside 401(k) Plans

1. Align Plan Designs Early

The 401(k) and cash balance plan must be designed as a pair. This ensures contributions are efficient and nondiscrimination tests are met. Common strategies include:

Using a safe harbor 401(k) to automatically pass certain compliance tests.
Designing cash balance formulas that disproportionately benefit owners while still meeting fairness rules for employees.

2. Engage Expert Advisors

Cash balance plans require actuarial expertise, and both plans benefit from coordinated oversight. Employers should engage:

A TPA to handle compliance and testing.
An actuary to determine annual funding requirements for the cash balance plan.
An investment advisor like LSC Financial to guide plan investments and monitor fiduciary responsibilities.

3. Understand Contribution Flexibility and Obligations

401(k) plans offer flexibility—employees can choose how much to contribute each year.
Cash balance plans require employer commitments—annual contributions must be made, regardless of business profitability.

Best practice: Ensure the business has predictable cash flow before adopting a dual-plan approach.

4. Optimize Tax Efficiency

Dual plans create significant tax advantages when structured properly:

Owners and partners can shelter more income in tax-deferred retirement savings.
Employer contributions reduce taxable income at the business level.
Distributions in retirement may be taxed at lower rates depending on income.

At LSC Financial, we help employers model different funding scenarios to balance savings with cash flow needs.

5. Plan for Investments Carefully

Cash balance plans typically have conservative investment targets since the employer is responsible for delivering the promised interest credits. 401(k) plans, by contrast, allow participants to choose from a variety of investment options.

Best practice: Create an investment policy that reflects the goals of each plan while maintaining compliance with fiduciary standards.

6. Communicate with Employees

Employees may not understand the differences between a 401(k) and a cash balance plan. Effective communication should:

Explain how contributions are made and how balances grow.
Provide clear examples of benefits.
Highlight the employer’s commitment to long-term retirement security.

Transparent communication improves employee appreciation and retention.

Example: Professional Services Firms

Cash balance + 401(k) plans are especially popular among:

Law firms
Medical practices
Engineering and consulting groups

In these industries, owners often seek high contribution limits while still offering competitive retirement benefits to staff. Dual plans provide the flexibility and tax efficiency needed to meet these goals.

Conclusion

Managing cash balance plans alongside 401(k) plans offers employers a unique opportunity to maximize retirement benefits, reduce taxes, and attract top talent. But without proper planning, these arrangements can create unnecessary complexity and compliance risks.

At LSC Financial, we help employers design, implement, and manage dual plan strategies that balance savings goals with regulatory requirements. With the right guidance, businesses can create retirement programs that benefit both owners and employees for decades to come.