Defined Contribution vs Defined Benefit Pension Plans

Updated for the 2026-2027 CFA® Level I curriculum.

A pension plan is a structured way for employers to help employees save for retirement. The two main pension plan types, defined contribution and defined benefit, differ in who contributes money, who bears investment risk, and who ultimately guarantees the retirement payout.

CFA Level I tests whether you can identify these differences and apply them to short scenario questions. Getting this distinction right also builds the foundation for later readings on institutional investors and asset allocation.

Key Takeaways About Defined Contribution vs Defined Benefit Pension Plans

• DC plans define the input (the contribution). DB plans define the output (the benefit).

• Investment risk sits with the employee in a DC plan and with the sponsor in a DB plan.

• DC plan balances belong to the employee and typically move with them between jobs.

• DB plan obligations stay on the sponsor's balance sheet until every promised benefit is paid.

• CFA Level I questions often test risk-bearer identification more than plan mechanics.

• A DB plan's funded status depends on actuarial assumptions, not just contributions made.

What You Need to Know for CFA Level I

• Identify whether a scenario describes a DC or DB plan based on what is fixed: contribution or benefit.

• Know that DC plan risk sits with the employee and DB plan risk sits with the sponsor.

• Recognize that DC plans have individual accounts while DB plans pool assets.

• Understand portability differences and why job changes affect DB participants more.

• Connect plan type to the sponsor's balance sheet exposure, since DB promises are long-term liabilities.

• Avoid confusing contribution certainty with benefit certainty. These are opposite features.

Pension Plans Within Portfolio Management

Pension plans appear in Portfolio Management as an example of an institutional investor with a defined purpose: funding retirement income. Before you study institutional investors broadly, you need to understand the two structures that create very different investment objectives and risk exposures. A DC plan behaves like a collection of individual investors. A DB plan behaves like a single institution managing a long-term liability.

Defined Contribution Plan Structure

In a DC plan, the employer, the employee, or both contribute a set amount into an individual account. Common contribution rules include a fixed percentage of salary or an employer match up to a limit. The employee then selects investments from a menu, often mutual funds or target-date funds.

The account balance at retirement depends on three factors: total contributions, investment returns, and time in the market. No one promises a specific ending balance. If markets perform poorly in the years before retirement, the employee's balance falls, and no party is obligated to make up the shortfall.

This structure explains why DC plans transfer investment risk to the employee. The employer's job ends once the contribution is made correctly. The employee then owns both the upside and the downside of investment performance.

Defined Benefit Promise

A DB plan works in reverse. The sponsor promises a specific benefit, usually calculated with a formula such as years of service multiplied by a percentage of final average salary. The sponsor then must invest plan assets to generate enough return to pay that promised benefit decades into the future.

If investments underperform, the sponsor must contribute more money to cover the shortfall. If investments outperform, the sponsor may reduce future contributions. Either way, the employee's eventual benefit does not change based on investment results. The promise is fixed. The funding path to meet that promise is the sponsor's problem.

This is why DB plans require actuarial assumptions about mortality, salary growth, and discount rates. These assumptions estimate the present value of future obligations, which drives how much the sponsor needs to contribute today.

Who Bears Investment Risk

This is the single most testable distinction. In a DC plan, poor investment returns reduce the employee's retirement account directly. In a DB plan, poor investment returns increase the sponsor's required contributions, but the employee's promised benefit stays the same.

A simple way to remember this: DC risk flows down to the individual. DB risk flows up to the sponsor.

Funding and Portability

DC plans are fully funded by design. Whatever has been contributed and earned is what exists in the account. There is no unfunded liability because there is no promised amount to compare against.

DB plans can become underfunded or overfunded. Underfunded means plan assets are worth less than the present value of promised benefits. Overfunded means the opposite. This funded status matters to analysts evaluating a company's financial health, since a large pension deficit is effectively a long-term liability.

Portability also differs. A DC account belongs to the employee and typically transfers to a new employer's plan or an individual retirement account. A DB benefit is often based on years of service with one employer, so leaving early can reduce the eventual payout. This makes DC plans more portable for employees who change jobs frequently.

Worked Example

Scenario: Two employees work at different companies.

Maria works at Colton Manufacturing. Colton contributes 6% of Maria's salary each year into an individual account that Maria manages. Maria's retirement income will depend on how her investment choices perform over the next 25 years.

James works at Bellwood Logistics. Bellwood promises James a retirement benefit equal to 1.5% of his final average salary multiplied by his years of service. Bellwood manages a pooled investment fund to meet this obligation.

Step 1: Identify what is fixed.

Colton fixes the contribution rate. Bellwood fixes the benefit formula.

Step 2: Identify the plan type.

Maria's plan is a defined contribution plan. James's plan is a defined benefit plan.

Step 3: Identify who bears investment risk.

Maria bears the risk. If her investments underperform, her retirement account shrinks and no one compensates her for the shortfall.

Bellwood bears the risk. If the pooled fund underperforms, Bellwood must contribute more to meet James's promised benefit. James's payout does not change.

Plain-English interpretation: Maria's retirement outcome depends on her own investment decisions and market performance. James's retirement outcome is fixed by formula, and Bellwood absorbs the investment uncertainty required to fund that formula.

Common Exam Traps

Confusing contribution certainty with benefit certainty

A DC plan has a certain contribution but an uncertain benefit. A DB plan has the opposite: an uncertain contribution requirement but a certain benefit. Mixing these up leads to the wrong answer on classification questions.

Assigning investment risk to the wrong party

Some candidates assume the employer always bears risk because the employer runs the plan. In a DC plan, the employer's obligation ends at the contribution. The employee bears the risk from that point forward.

Assuming portability is identical across plan types

DC accounts move with the employee. DB benefits are frequently tied to years of service with a single employer, which reduces portability for employees who switch jobs.

Adding unsupported legal or tax details

CFA Level I does not test jurisdiction-specific pension law or tax treatment. Stick to the structural distinction between contribution certainty and benefit certainty.

Practice Question

Grantham Logistics offers employees a retirement plan where the company contributes 5% of each employee's salary annually into a personal investment account. Employees choose their own investment funds and bear full responsibility for account performance.

Which statement best describes this plan and its risk allocation?

1. This is a defined benefit plan, and Grantham bears the investment risk because it manages the contribution schedule.

2. This is a defined contribution plan, and employees bear the investment risk because their retirement balance depends on investment performance.

3. This is a defined benefit plan, and employees bear the investment risk because they choose the underlying investment funds.

FAQs About Defined Contribution vs Defined Benefit Pension Plans