What it means
The defining feature is that the benefit is fixed and the cost is variable. The employer commits to paying a set income for life, then has to invest enough and contribute enough to meet that promise regardless of how markets perform.
If investments disappoint or people live longer than expected, the employer must find the extra money. The pension itself is normally calculated from three inputs: an accrual rate, years of pensionable service, and a salary figure that is either the final salary or an average across the career.
A scheme offering a sixtieth of salary for each year served gives someone with 30 years of service half of their final salary, which is a substantial commitment. For businesses these plans are significant balance sheet items rather than simple payroll costs.
Accounting standards require companies to estimate the present value of all future pension payments and compare it with the assets set aside, showing any shortfall as a liability. That number swings sharply with interest rates, because a lower discount rate makes the same future payments more expensive today.
Defined benefit plans have become rare in the private sector for exactly this reason. Rising life expectancy and long periods of low interest rates pushed funding costs far above what employers originally assumed, so most have closed their schemes to new members and to further accrual.
Public sector employers and some large legacy employers still run them. Anyone joining or leaving a company with such a scheme should understand the transfer and vesting rules.
Benefits typically vest after a minimum service period, and transferring out converts a guaranteed income into an investment pot where the member, not the employer, then carries all the risk.
In practice
Real-world examples.
Example
A long-serving council engineer retires after 35 years on a $60,000 final salary with a 1/60th accrual rate. Her pension is (1 / 60) x 35 x $60,000 = $35,000 a year, guaranteed for life and increased annually in line with inflation.
Example
A manufacturing group closes its defined benefit scheme to future accrual and moves all staff onto a defined contribution plan. Existing members keep the benefits already earned, but the company caps the growth of a liability that had reached $180,000,000.
Example
An acquirer walks away from a deal after discovering a $45,000,000 pension deficit in the target's defined benefit scheme. The pension trustees would have required substantial extra contributions as a condition of approving the change of ownership.
Think of it
“Defined benefit is guaranteed retirement income-your pension based on formula.
Formula
Calculation
Annual Pension = Accrual Rate x Years of Pensionable Service x Final Pensionable Salary
An employee retires after 30 years of service with a final pensionable salary of $80,000, under a scheme with an accrual rate of 1.5% per year. The annual pension is 0.015 x 30 x $80,000 = $36,000, which equals 45% of final salary because 0.015 x 30 = 0.45.
To see the employer's exposure, assume the pension is expected to be paid for 20 years of retirement. Ignoring investment returns and inflation for simplicity, the total promised is 20 x $36,000 = $720,000 for that one employee. Across a workforce of 500 similar members the raw promise is 500 x $720,000 = $360,000,000, which is why defined benefit obligations dominate the balance sheets of some older companies.Case study
Seen in the real world.
Halloway Engineering is an invented family manufacturer used here as an illustrative example. Its defined benefit scheme, opened decades earlier, promised 1.5% of final salary per year of service and was comfortably funded when interest rates were high.
As discount rates fell, the calculated present value of Halloway's obligations rose sharply even though the promises themselves had not changed. The scheme moved from a modest surplus to a $22,000,000 deficit, and the trustees agreed a ten-year recovery plan requiring $2,200,000 of extra employer contributions each year.
That commitment consumed most of the capital Halloway had earmarked for new machinery. The illustrative lesson is that a defined benefit promise made in one economic environment can become a heavy operating constraint in another, because the employer, not the employee, absorbs every adverse change.
Watch out
Common mistakes.
- Assuming the pension is safe simply because the employer is profitable, when funding depends on scheme assets and the sponsor's long-term ability to pay.
- Reading a reported pension deficit as a debt due immediately, when it is a long-term estimate paid down over many years.
- Transferring out of a scheme for a headline cash figure without recognising that all investment and longevity risk moves to the member.
Questions
People also ask.
Who bears the investment risk in a defined benefit plan?
The employer does, because the promised benefit stays the same regardless of how the scheme's investments perform.
Why do deficits move so much year to year?
Because the liability is the discounted value of payments decades ahead, and a small change in the discount rate or in life expectancy changes that value substantially.
Are these plans still available to new employees?
Rarely in the private sector, where most schemes are closed, though they remain common in parts of the public sector.
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