How can companies manipulate earnings through pension assumptions, and what adjustments should analysts make?

Pension accounting provides management with several discretionary assumptions that directly impact reported pension expense and, through it, net income. The three most manipulable assumptions are the expected return on plan assets (US GAAP), the discount rate, and the salary growth rate.

Assumption 1: Expected Return on Plan Assets (EROA) — US GAAP Only

As discussed in our earlier Q&A on EROA, this assumption directly reduces pension expense dollar-for-dollar. An overly optimistic EROA inflates earnings.

Detection: Compare to:

• Actual returns over the past 3-5 years
• Peer company assumptions with similar asset allocations
• A bottom-up estimate based on the plan's asset mix (equity %, fixed income %)

Assumption 2: Discount Rate

A higher discount rate reduces the PBO and interest cost, lowering pension expense. But it also reduces the present value of the obligation — improving the funded status.

Manipulation risk: Companies select a discount rate at the high end of the acceptable range to minimize reported pension liability and expense.

Detection:

• Compare to AA corporate bond yields of similar duration
• Compare to peer discount rates
• Check if the discount rate trend contradicts the yield environment

Assumption 3: Salary Growth Rate

A lower salary growth assumption reduces the projected benefit obligation (PBO) because future benefits are projected to be smaller.

This is harder to detect because salary growth depends on company-specific factors.

Worked Example — Three Companies in the Same Industry:

Impact on Pension Expense:

Company B's aggressive assumptions (high EROA, high discount rate, low salary growth) produce the lowest pension expense and therefore the highest reported earnings — by $26M compared to Company C.

Analyst Adjustments:

1. Normalize EROA to an industry-standard assumption based on the plan's asset allocation
2. Recalculate pension expense using the normalized assumption
3. Adjust net income for the difference between reported and normalized expense
4. Compare funded status under different discount rate scenarios
5. Watch for one-time gains from plan amendments, curtailments, or settlements that boost earnings

Other Red Flags:

• Plan asset allocation shifting to fixed income while EROA remains high
• Discount rate increasing when market yields are falling
• Unusual smoothing of actuarial losses (keeping them in OCI longer)
• Large "expected return" relative to plan asset size

Key Exam Points:

1. EROA, discount rate, and salary growth are the three key manipulable assumptions.
2. Always compare assumptions to peers, market conditions, and historical actuals.
3. Normalize assumptions across companies for apples-to-apples comparison.
4. Under IFRS, EROA does not exist (net interest approach), so the discount rate is the primary lever.

Explore pension analysis techniques in our CFA Level II FRA materials.