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Defined Benefit Plans: Measurement and Net Defined Benefit Liability

Updated 11 October 2026 · Fact-checked

The net defined benefit liability (asset) under IAS 19 is the present value of the defined benefit obligation minus the fair value of plan assets. The obligation is measured using the projected unit credit method. If the result is an asset, you cap it at the asset ceiling.

Understand Defined Benefit Plans: Measurement and Net Liability

A defined benefit plan promises employees a set pension, often based on final salary and years of service. The employer carries the risk. If the plan runs short, the employer must make up the gap. So IAS 19 makes the employer show that gap on its statement of financial position.

Two numbers drive the position. The defined benefit obligation (DBO) is the present value of benefits earned so far. Plan assets are the fair value of the investments held in the fund, plus qualifying insurance policies. The difference is the net defined benefit liability if the obligation is bigger, or a net defined benefit asset if the assets are bigger.

The DBO is measured with the projected unit credit method. Each year of service earns a further unit of benefit. You estimate the final benefit using expected future salaries, then spread it over service years. You then discount it to present value. Because it uses expected salaries, the result depends on actuarial assumptions: discount rate, salary growth, mortality, staff turnover and retirement age. These must be unbiased and consistent with each other.

The discount rate is based on market yields at the reporting date on high-quality corporate bonds. Where there is no deep market, use government bond yields. The currency and term must match the benefits. Do not use the expected return on plan assets as the discount rate. A higher discount rate lowers the DBO.

A net asset is not always recognised in full. The asset ceiling limits it to the present value of economic benefits available as refunds or reductions in future contributions. IFRIC 14 explains how to assess this, including when a minimum funding requirement could make the entity owe extra contributions. If those contributions would not be recoverable, an additional liability may be needed.

Key rules to remember

Net defined benefit liability (asset): Net DB liability (asset) = PV of DBO − Fair value of plan assets; A positive answer is a liability. A negative answer is a potential asset, subject to the asset ceiling.
Roll-forward of the DBO: Closing DBO = Opening DBO + Current service cost + Interest cost + Past service cost − Benefits paid ± Actuarial (remeasurement) loss/gain; Settlements also reduce the DBO. Benefits paid come out of the DBO and out of plan assets.
Roll-forward of plan assets: Closing assets = Opening assets + Interest income + Contributions − Benefits paid ± Remeasurement gain/loss on assets; The remeasurement is the return on assets excluding the interest income amount.
Net interest: Net interest = Opening net DB liability (asset) × discount rate; Adjust for material contributions and benefit payments during the year, weighted by time. Use the discount rate set at the start of the year.
Recognition of the cost: P&L: current service cost + past service cost + net interest. OCI: remeasurements; Remeasurements are never reclassified to profit or loss later. They include actuarial gains and losses, return on assets above interest income and changes in the asset ceiling effect.
Asset ceiling: Recognised asset = lower of (surplus) and (asset ceiling); Asset ceiling = PV of refunds available plus PV of reductions in future contributions. Any excess is written off through OCI.

How to solve Defined Benefit Plans: Measurement and Net Liability questions

Use this order for any IAS 19 defined benefit measurement question. Set it out as two reconciliations and then a statement of financial position figure.

1Read the requirement. Decide if you need the closing net position, the P&L charge, the OCI figure or all three.
2List the data. Note opening DBO and assets, service cost, contributions, benefits paid, discount rate and closing fair values.
3Build the DBO reconciliation. Start with opening DBO. Add current service cost and interest at opening DBO × discount rate. Deduct benefits paid. Add any past service cost.
4Build the plan assets reconciliation. Start with opening fair value. Add interest at the same discount rate, add contributions and deduct benefits paid.
5Insert the closing fair values given. The balancing figures are the remeasurements. Closing DBO minus the roll-forward gives the actuarial loss or gain. The same logic applies to assets.
6Calculate the net position as DBO minus assets. If it is an asset, compare it with the asset ceiling and recognise the lower amount.
7Allocate the movements. Service cost, past service cost and net interest go to profit or loss. Remeasurements go to OCI.
8State the figures you will show in the statement of financial position, P&L and OCI, and add one line of comment if the scenario asks for advice.

Quickest way: Net position and OCI as a balancing figure

When to use it: Use this when the question gives opening and closing balances and asks for the OCI remeasurement. It saves building two full tables.

Work out the net opening position: opening DBO minus opening assets.
Calculate P&L items: current service cost, past service cost and net interest on the opening net position.
Add contributions paid as a reduction in the net liability, since they increase the assets.
Benefits paid cancel out in the net position. They reduce both DBO and assets by the same amount.
Roll the net liability: opening + service cost + past service cost + net interest − contributions = expected closing net liability.
Compare it with the actual closing net liability. The difference is the OCI remeasurement. If actual is higher, it is a loss in OCI.

Common mistakes in Defined Benefit Plans: Measurement and Net Liability

Using the expected return on plan assets instead of the discount rate for interest income.
Older versions of IAS 19 used an expected return, and many textbooks still show it.
Fix: Apply the same discount rate to both the DBO and the plan assets. The difference between actual return and interest income goes to OCI.
Putting actuarial gains and losses through profit or loss.
Students remember the old corridor method and think of smoothing.
Fix: The corridor is gone. All remeasurements go to OCI immediately and are never recycled to profit or loss.
Deducting benefits paid from the DBO but forgetting to deduct them from plan assets.
Benefits paid feel like a liability item only.
Fix: The fund pays the pension. Deduct benefits paid in both reconciliations. In the net position they cancel.
Recognising a net surplus in full without testing the asset ceiling.
The question gives the asset ceiling in a short note and it gets missed.
Fix: Whenever assets exceed the DBO, ask what refund or reduction in contributions is available. Recognise the lower figure and put the write-down in OCI.
Calculating interest on closing balances rather than opening balances.
Students apply the rate to the figure they see last in the question.
Fix: Use the opening net liability and the opening discount rate. Adjust only for material contributions or payments during the year, time-weighted.
Treating current service cost as an OCI item.
It comes from actuarial valuation, so it feels like an actuarial item.
Fix: Current service cost is the employee service earned in the year. It is an operating expense in profit or loss.

Worked examples

Example 1

At 1 January Year 1, Tarang Ltd's defined benefit obligation was $5,000,000 and plan assets had a fair value of $4,200,000. The discount rate is 6%. During Year 1: current service cost was $400,000, benefits paid were $300,000 and contributions paid were $350,000. At 31 December Year 1, the DBO was $5,700,000 and plan assets had a fair value of $4,800,000. Calculate the net liability at 31 December Year 1, the P&L charge and the remeasurement in OCI. Assume all flows occur on 31 December.

Show the solution

DBO roll-forward: opening 5,000,000 + service cost 400,000 + interest 300,000 (5,000,000 × 6%) − benefits paid 300,000 = 5,400,000 before remeasurement.
Actual closing DBO is 5,700,000. The actuarial loss on the DBO is 5,700,000 − 5,400,000 = 300,000.
Plan assets roll-forward: opening 4,200,000 + interest income 252,000 (4,200,000 × 6%) + contributions 350,000 − benefits paid 300,000 = 4,502,000 before remeasurement.
Actual closing assets are 4,800,000. The remeasurement gain on assets is 4,800,000 − 4,502,000 = 298,000.
Net liability at closing = 5,700,000 − 4,800,000 = 900,000.
P&L charge = current service cost 400,000 + net interest (300,000 − 252,000 = 48,000) = 448,000.
OCI remeasurement = loss 300,000 − gain 298,000 = net loss of 2,000.
Check: opening net liability 800,000 + P&L 448,000 − contributions 350,000 + OCI loss 2,000 = 900,000. This agrees.

Answer: Net defined benefit liability at 31 December Year 1: $900,000. P&L charge: $448,000. Net remeasurement loss in OCI: $2,000.

Example 2

Kavach Ltd has a defined benefit plan. At 31 December Year 2, the DBO is $8,200,000 and plan assets are $9,000,000. The company can recover the surplus only through reduced future contributions. The present value of the reductions in future contributions is $500,000. At 31 December Year 1, there was no surplus and no asset ceiling adjustment. Show the amount recognised and the effect on OCI for the asset ceiling. Ignore all other remeasurements.

Show the solution

Calculate the surplus: plan assets 9,000,000 − DBO 8,200,000 = 800,000.
Identify the asset ceiling: the present value of reductions in future contributions is 500,000. No refund is available.
Recognise the lower of surplus 800,000 and ceiling 500,000. The net defined benefit asset is 500,000.
The excess of 300,000 (800,000 − 500,000) is not recognised.
Record the 300,000 as a remeasurement loss in OCI, arising from the effect of the asset ceiling. Keep the other remeasurements separate, as they are ignored here.
Disclose the surplus as a net defined benefit asset of 500,000 in the statement of financial position. Note that the plan's surplus is greater than the amount recognised.

Answer: Recognise a net defined benefit asset of $500,000. The $300,000 excess surplus is not recognised, and the reduction is shown in OCI as the effect of the asset ceiling.

Exam tips

Show both reconciliations in full, even if the question looks short. Marks go for each correct line and for the balancing remeasurement figure.
Always state the allocation: service cost and net interest to profit or loss, remeasurements to OCI. Many students lose marks by getting the numbers right and the location wrong.
In SBR scenario questions, a short reasoned note on discount rate or assumptions earns professional skills marks. Say why a change in assumption moves the DBO.
If a surplus appears, test it. Even one sentence on the asset ceiling and IFRIC 14 minimum funding can earn a mark.
Mark any timing assumptions, such as year-end payment of contributions. Exam questions often tell you to ignore timing, but state it if they do not.

Practice questions from Employee benefits

Defined Benefit Plans: Measurement and Net Liability in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Defined Benefit Plans: Measurement and Net Liability: frequently asked questions

What is the projected unit credit method in IAS 19?

It measures the DBO by treating each year of service as earning one extra unit of benefit. You project the final benefit using expected salaries, attribute it to service years and discount it to present value. It is the only method IAS 19 allows.

How do I calculate the net defined benefit liability?

Take the present value of the defined benefit obligation and deduct the fair value of plan assets. A positive result is a net liability. A negative result is a surplus, which you test against the asset ceiling before recognising it.

What is the asset ceiling under IAS 19 and IFRIC 14?

The asset ceiling limits a recognised surplus to the present value of refunds and reductions in future contributions available to the entity. IFRIC 14 gives the guidance. A minimum funding requirement can also create an extra liability if the contributions would not be recoverable.

Which actuarial assumptions affect the present value of the obligation?

The main ones are the discount rate, future salary increases, mortality, employee turnover and retirement age. A lower discount rate or higher salary growth increases the DBO. Changes in these assumptions create actuarial gains or losses in OCI.