DB vs. DC Plans: Navigating the Strategic Tradeoffs

Bottom Line Up Front

• Defined Benefit (DB) plans are built around the outcome. You’re promising a set retirement benefit. Defined Contribution (DC) plans focus on what goes in, but the final result depends on investment performance. 
• The biggest difference comes down to who takes on the risk: DB plans place investment and longevity risks on the employer, while DC plans shift those primarily to the employee. 
• Choosing the right plan depends on your budget, workforce, and long-term goals (and in many cases, a combination of both might make the most sense).

When it comes to retirement plans, most employers—and employees—are working within one of two structures: defined benefit (DB) plans or defined contribution (DC) plans. 

Over the past several years, we’ve seen a clear shift. In the private sector, DC plans have become the standard, while DB plans remain more common in the public sector. According to the U.S. Bureau of Labor Statistics, only about 15% of private industry workers had access to a DB plan as of March 2023, compared to 67% with access to a DC plan.

But beyond the trends the real difference between these plans comes down to one core question: who is responsible for the outcome?

The Core Difference: Promise vs. Contribution 

At a high level, Defined Benefit plans promise a specific benefit at retirement, typically based on years of service and pay, with the employer responsible for funding that promise. Defined Contribution plans set the contribution amount upfront, but the retirement benefit depends on how much is saved and how investments perform. 

That distinction drives everything else: risk, funding, predictability, and even how employees experience their retirement plan over time. 

What is a Defined Benefit (DB) Plan?

A retirement plan that promises a specific benefit at retirement, typically based on a formula 

That formula usually includes: 

• Years of service 
• Final average compensation 
• A benefit multiplier

From the employee’s perspective, the biggest advantage is predictability. From the employer’s perspective, it comes with responsibility. 

The employer (or plan sponsor) is on the hook for funding the plan, managing investments, and making sure the promised benefit can actually be paid. Because of that, contributions can fluctuate depending on the market and actuarial assumptions, and ongoing actuarial valuations are required. 

You’ll most commonly see DB plans in the form of traditional pensions or cash balance plans, which are a more modern, hybrid version of the same concept. 

A Note on Modern DB Plans: Cash Balance Plans

While traditional pension formulas still exist, many employers today are adopting a more modern “hybrid” version of a defined benefit plan known as a Cash Balance Plan.

Cash Balance plans are still DB plans at their core, but they’re structured in a way that often feels more familiar to employees. Instead of a lifetime annuity being the focus, benefits are typically expressed as a growing account balance made up of: 

• Annual pay credits
• Interest credits

That design can make the plan easier to understand, while still allowing employers to offer significantly higher contribution levels, especially for business owners, than a standalone defined contribution plan. 

What is a Defined Contribution (DC) Plan?

A defined contribution (DC) plan takes a different approach. Instead of promising a future benefit, it defines the contributions going into the plan. 

The final outcome is driven by:

• Contributions
• Investment performance
• Fees

There’s no guaranteed income at retirement, which means the responsibility shifts more toward the employee. 

Participants are making investment decisions, managing their savings rate, and ultimately absorbing the impact of market ups and downs. 

Plans like 401(k)s, 403(b)s, and 457 plans fall into this category. They’re generally easier for employers to administer and offer more cost predictability, which is one of the main reasons they’ve become so widely adopted.

If you’re evaluating or redesigning a plan, this overview of 401(k) plan design walks through the key decisions that actually shape how the plan functions. 

Side-by-Side Comparison

While both types are built to support retirement, they do it in fundamentally different ways.

When Each Plan Type Makes Sense 

Defined benefit plans tend to align well with organizations that have a stable, long-tenured workforce and a desire to provide predictable retirement income. They can also be a powerful tool for high-income business owners looking to defer more for retirement, particularly when structured as cash balance plans. 

Defined contribution plans are often a better fit for organizations that want more control over annual costs or have a workforce that values flexibility and portability. They also tend to resonate with employees who prefer having direct control over how their retirement assets are invested. 

What to Consider Before Choosing a Plan

Choosing between a DB and DC plan isn’t just about how they work, but how they fit into your overall strategy.

A few things to think through: 

• Cost predictability vs. variability: DB plans can introduce year-to-year contribution swings, while DC plans are typically more stable.
• Risk allocation: DB plans place investment and longevity risk on the employer; DC plans shift that risk to employees. 
• Workforce dynamics: Long-tenured teams may value DB plans more, while mobile workforces often prefer DC plans. 
• Administrative complexity: DB plans require actuarial oversight and more governance; DC plans are generally simpler. 
• Long-term financial impact: DB plans create ongoing liabilities, while DC plans limit obligations to annual contributions. 

Can You Offer Both?

In many cases, this isn’t an either/or decision because defined benefit and defined contribution plans can be complimentary with many employers offering both. 

This structure can: 

• Allow business owners to contribute significantly more toward retirement
• Provide meaningful, competitive benefits for employees 
• Balance long-term retirement security with flexibility

Where to Go From Here

The right approach comes down to aligning your plan with your organization’s financial capacity, workforce needs, and long-term goals. Whether that’s a defined benefit plan, a defined contribution plan, or a mix of both, the goal is the same: creating a strategy that works in practice, not just on paper. 

If you’re thinking through what the right plan looks like for your organization, or whether a defined benefit, defined contribution, or hybrid approach makes the most sense, it’s worth having that conversation early. 

If you want a second set of eyes on your current plan or are exploring your options, we’re always happy to talk through it.