Defined Benefit vs Defined Contribution: Which Type Is Your Plan?

The fundamental distinction between defined benefit (DB) and defined contribution (DC) plans lies in what the plan defines.

Defined benefit plans promise a specific, predetermined retirement benefit, often calculated based on factors like salary history and years of service. The employer bears the responsibility for ensuring there are sufficient funds to pay these benefits, taking on the investment risk.

In contrast, defined contribution plans specify the amount of contribution made by the employer, the employee, or both, into an individual account. The ultimate retirement benefit depends on the total contributions made, plus or minus investment gains or losses. The employee typically bears the investment risk in these plans.

In defined benefit schemes, the sponsor (employer) is responsible for funding the plan actuarially. This means they must make regular contributions to ensure the plan can meet its future obligations to retirees. The employer also bears the investment-return risk; if investments underperform, the employer must contribute more to make up the shortfall. This arrangement provides employees with a predictable income stream in retirement, but it can create significant financial liabilities for employers.

Conversely, with defined contribution plans, participants direct their own accounts. Contributions are invested, and the participant's retirement benefit is directly tied to the performance of these investments. The burden of investment risk falls on the individual participant. While this offers flexibility and potential for significant growth, it also means participants must actively manage their investments and assume the risk of market downturns that could impact their retirement savings.

The 401(h) account is a specialized feature that allows for the pre-funding of retiree health benefits within a qualified pension or annuity plan. In practice, this almost exclusively means a defined benefit (DB) plan or a cash balance plan.

The regulatory framework for 401(h) accounts requires them to be incidental to retirement plan benefits, meaning the primary purpose of the plan must be retirement income. Because defined benefit plans provide a guaranteed future retirement benefit, they are the natural host for integrating these pre-funded health benefits. Defined contribution plans, with their individual accounts and lack of guaranteed future benefits, do not typically serve as a host for 401(h) provisions.

Understanding the everyday examples of these plan types can help clarify their differences.

Traditional pension plans are the quintessential example of a defined benefit plan, promising a set monthly income for life upon retirement. Another increasingly popular DB variant is the cash balance plan, which combines features of both DB and DC plans. While it defines a benefit, it's expressed as an account balance, offering a clearer picture to employees while retaining the employer-backed guarantees of a DB plan.

From a participant's perspective, defined contribution plans often offer greater flexibility and control. Employees can typically choose their investment options, adjust their contribution levels, and often have portability of their account balances if they change employers.

From the sponsor's perspective, defined benefit plans offer greater control over benefit design and can be a powerful tool for employee retention, as benefits often accrue more significantly with longer service. However, they also come with significant administrative complexity and actuarial requirements. Defined contribution plans, while still requiring administration, can simplify the employer's financial forecasting, especially when investment risk is largely shifted to participants.

For business owners, the choice between, or combination of, defined benefit and defined contribution plans involves strategic considerations regarding financial goals, employee demographics, and desired tax advantages.

Defined benefit plans, particularly cash balance plans, can be highly effective for owners looking to maximize their personal tax-deferred retirement savings, especially in profitable businesses. They allow for substantial contributions that often exceed the limits of traditional defined contribution plans. Combining both plan types, known as a 'stacked' or 'pension stacking' approach, is a common strategy for owner-led businesses to optimize retirement savings for the business owner while still providing competitive benefits to employees.