IAS 19 Defined Benefit Plans, Actuarial Assumptions and Indian Gratuity Reality

IAS 19 Defined Benefit Plans, Actuarial Assumptions and Indian Gratuity Reality

By Sai Manikanta Pedamallu (ACCA, CMA US, CSCA US, CGMA, ACMA, Dip IFRS, M.Com, MBA, MA)

Lead Instructor, Global Fin X | www.globalfinx.in/manikanta

---

Post 56 established the classification framework and worked through why gratuity, in almost every Indian employment structure, is a defined benefit plan rather than a defined contribution one. This post is about what happens once that classification has been made: the actual mechanics of measuring the obligation, the assumptions that drive it, and the specific presentation split between profit or loss and other comprehensive income that trips up more preparers than any other single feature of IAS 19.

I want to say something plainly before getting into the mechanics. The 2011 revision to IAS 19, which abolished the old "corridor" method and routed all actuarial gains and losses through OCI instead, was not a minor technical tweak. It fundamentally changed how volatile a company's reported profit looks in a year when bond yields move sharply, and it is precisely the reason Indian finance teams now spend real time each year negotiating discount rate assumptions with actuaries rather than treating the gratuity valuation as a formality bolted onto payroll.

---

The Projected Unit Credit Method: The Only Method Permitted

IAS 19 requires an entity to use the projected unit credit method, and only this method, to determine the present value of its defined benefit obligation, the related current service cost, and, where applicable, past service cost. There is no alternative permitted method under IFRS for this measurement; unlike some other areas of accounting where entities choose between competing techniques, this one is mandatory.

The projected unit credit method works by treating each period of an employee's service as giving rise to an additional unit of benefit entitlement, and measuring each unit separately to build up the final obligation. Conceptually, it asks: how much of the ultimate benefit the employee will eventually receive has been earned through service already rendered up to today, and what is the present value of that earned-to-date portion?

This requires the entity to project the final benefit the employee will actually receive (which for gratuity means projecting the employee's likely salary at the point of eventual departure, not the current salary), attribute a fair portion of that ultimate benefit to each year of service (both past and future), and then discount the portion attributable to service already rendered back to a present value at the reporting date, using assumptions about mortality, employee turnover, salary escalation, and the discount rate itself.

A Simplified Illustration of the Attribution Principle

Before adding the full complexity of discounting and multiple actuarial assumptions, it helps to see the basic attribution logic in isolation. Suppose an employee is expected to receive a final benefit of Rs. 3,50,000 on retirement after a total career of 10 years of service, with the benefit formula attributing entitlement evenly across the service period (a simplification; many real benefit formulas are back-loaded rather than even, since gratuity is explicitly linked to years of service accumulated near the end of the career).

If benefit is attributed evenly, each year of service earns Rs. 35,000 of the ultimate benefit (Rs. 3,50,000 divided by 10 years). After 6 completed years of service, the employee has earned Rs. 2,10,000 of ultimate benefit (6 × Rs. 35,000). This Rs. 2,10,000 is the undiscounted obligation attributable to past service at that point; the actual defined benefit obligation recognised on the balance sheet is the present value of this amount, discounted for the remaining years until the benefit is actually expected to be paid.

---

Building the Full Defined Benefit Obligation: The Components

Each period, the present value of the defined benefit obligation moves through a specific set of components, and IAS 19 requires each component to be tracked and presented differently.

Current service cost is the increase in the present value of the defined benefit obligation resulting from employee service in the current period. This is the new benefit earned this year, discounted to present value, and it is recognised in profit or loss.

Past service cost arises when a plan is amended or curtailed (changing the benefit formula, for instance, or reducing the population of employees covered), changing the present value of the defined benefit obligation for service already rendered in prior periods. Following the 2018 amendment to IAS 19, an entity is required to use updated actuarial assumptions to determine current service cost and net interest for the remainder of the period after a plan amendment, curtailment, or settlement, rather than continuing to use the assumptions determined at the start of the year as if nothing had changed. Past service cost (whether positive, from an improved benefit, or negative, from a curtailment reducing the benefit) is recognised immediately in profit or loss, not spread over any future service period.

Net interest on the net defined benefit liability (or asset) is calculated by applying the discount rate (the same rate used to measure the obligation itself) to the net defined benefit liability or asset as it stood at the start of the period, adjusted for contributions and benefit payments during the period. This single net interest figure effectively combines what used to be presented separately as interest cost on the obligation and expected return on plan assets; since the 2011 revision, both are calculated using the same discount rate, and only the single net figure flows through profit or loss.

Remeasurements capture everything else: actuarial gains and losses on the obligation (arising because actual experience during the period differed from what was assumed, or because assumptions themselves have been revised at the current reporting date), the return on plan assets excluding the amount already captured within net interest, and any change in the effect of the asset ceiling (excluding amounts included in net interest). These remeasurement components are recognised in other comprehensive income, and, critically, they are never recycled to profit or loss in any later period, though an entity may transfer amounts recognised in OCI within equity, for instance moving accumulated remeasurements directly into retained earnings.

This split, service cost and net interest through profit or loss, remeasurements through OCI and never recycled, is the single most consequential structural feature of the standard, and it is worth restating why it exists. Service cost and net interest are relatively predictable, model-driven figures that management can reasonably be expected to explain and that analysts can reasonably compare year on year as a measure of the ongoing cost of providing the benefit. Actuarial gains and losses driven by a sudden movement in government bond yields, or by employees actually leaving the company at a different rate than assumed, are volatility that has little to do with the entity's operating performance in the period, and routing this volatility through OCI (rather than profit or loss) keeps the reported operating profit figure more stable and more genuinely comparable across periods.

---

The Actuarial Assumptions: What Actually Drives the Number

The Discount Rate

The discount rate is, by a wide margin, the single most consequential and most heavily scrutinised assumption in the entire valuation. IAS 19 requires the rate to be determined by reference to market yields at the reporting date on high quality corporate bonds, with a duration consistent with the estimated duration of the benefit obligation being measured; where no deep market exists in such bonds (as is the case in India), the market yields on government bonds of that currency and duration are used instead.

This is not a matter of managerial discretion or judgment about the company's own cost of capital. It is not the expected return on plan assets. It is a specific, externally observable market rate, and Indian actuaries and auditors reference the Financial Benchmarks India (FBIL) government securities yield curve, the RBI-designated benchmark administrator for G-Sec valuation, as the standard source for this rate. As at recent quarter-ends, this yield has generally sat in the region of 6.8% to 7.2% per annum for durations typical of Indian gratuity obligations, though the precise figure moves with market conditions and must be reassessed at every reporting date, not merely inherited from the prior valuation.

The sensitivity here is genuinely large. For an obligation with a duration of around 12 years (a reasonably typical figure for an Indian gratuity population with a mix of tenures), a 50 basis point increase in the discount rate can reduce the present value of the obligation by approximately 6%. For a mid-sized company carrying a gross gratuity obligation of, say, Rs. 10 crore, that 50 basis point movement alone can shift the balance sheet liability by roughly Rs. 60 lakh, entirely from a change in the reference bond yield and with no change whatsoever in the underlying employee population or benefit formula. This is precisely the kind of movement that flows through OCI as a remeasurement, not through profit or loss, and it is exactly the volatility the 2011 OCI split was designed to keep out of reported operating performance.

Because the duration of the obligation, not a single blanket rate, governs which point on the yield curve is used, gratuity, leave encashment, and any post-retirement medical benefit obligation at the same company can, in principle, each warrant a slightly different discount rate reflecting their differing durations, though in practice the difference between adjacent points on the curve is often small enough that companies with multiple benefit types use a single blended rate as a practical simplification.

Salary Escalation Rate

Because gratuity (and many other Indian defined benefit arrangements) is calculated with reference to final or near-final salary, the projected rate of future salary growth is a critical input, typically set with reference to the company's own historical salary increase pattern, inflation expectations, and industry norms, commonly falling in a range of roughly 5% to 10% per annum depending on sector and company-specific history. A higher assumed salary escalation rate increases the projected ultimate benefit and therefore increases the present value of the obligation.

Attrition (Withdrawal) Rate

The attrition assumption estimates the rate at which employees are expected to leave before reaching the benefit trigger event (in India's case, this matters less for gratuity itself, since gratuity vests after a relatively short qualifying period and departing employees still typically receive it, but it matters significantly for leave encashment and any benefit contingent on reaching a longer service milestone). Attrition assumptions in Indian actuarial practice vary widely by sector, commonly ranging from roughly 5% for stable, low-turnover industries to as high as 20-25% for sectors with historically high voluntary attrition such as certain segments of IT services and BPO.

It is worth being direct about a common misconception here: setting attrition at zero is not the "conservative" or "safe" assumption some finance teams assume it to be. A zero attrition assumption implies every current employee stays until normal retirement age, which, for a workforce with genuine historical turnover, systematically overstates the obligation by assuming a longer average service period (and therefore a larger accumulated benefit) than the company's own experience data would support. Getting the attrition assumption right requires genuine engagement with the company's own recent experience data, not a default setting chosen to appear cautious.

Mortality

Indian actuarial valuations reference a specified mortality table, the India Assured Lives Mortality (IALM) table, currently commonly the 2012-14 version, issued under the guidance of the Institute of Actuaries of India, as the standard reference for pre-retirement mortality assumptions in gratuity and similar valuations.

Retirement Age

The assumed normal retirement age, typically 58 or 60 depending on the specific company's policy and sector norms, sets the endpoint for the projection period over which future salary growth and service accumulation are modelled.

---

Plan Assets and the Net Position

Where a defined benefit obligation is funded (assets are held in a legally separate fund, or through an insurance policy such as those commonly issued by LIC's group gratuity schemes in India, specifically to meet the obligation), the fair value of those plan assets is deducted from the present value of the obligation to arrive at the net defined benefit liability (or, where plan assets exceed the obligation, a net defined benefit asset, subject to the asset ceiling discussed below) presented on the balance sheet.

It is worth being clear that funding is not a determinant of classification (an entirely unfunded gratuity obligation, paid directly by the company as it falls due with no separate trust or insurance policy at all, is still just as much a defined benefit plan as a fully funded one, as established in Post 56); funding only affects the net liability figure presented, by netting plan assets against the gross obligation.

The return on plan assets included within net interest is calculated using the same discount rate applied to the obligation, not the plan's actual or expected investment return; any difference between the actual return achieved and this net-interest-implied return is itself a remeasurement component, recognised in OCI, consistent with the general remeasurement treatment described above.

The Asset Ceiling

Where plan assets exceed the present value of the obligation, producing a net surplus, IAS 19 requires that any resulting net defined benefit asset be limited to the present value of any economic benefits available to the entity in the form of refunds from the plan or reductions in future contributions to it (the "asset ceiling"). An entity cannot simply recognise an unlimited asset on its balance sheet purely because a plan happens to be significantly overfunded, if it has no genuine, realisable economic benefit from that surplus, whether because of plan rules restricting refunds or minimum funding requirements that would absorb any surplus before the entity could ever access it.

---

Worked Example: A Complete Indian Gratuity Valuation

An Indian mid-sized manufacturing company (illustrative) has an unfunded gratuity obligation. At 31 March 2025, the actuarial valuation reports the following:

• Present value of defined benefit obligation (DBO), opening: Rs. 8.50 crore
• Discount rate (based on FBIL G-Sec yield for the relevant duration): 7.0% per annum
• Current service cost for the year: Rs. 0.90 crore
• Benefits paid during the year: Rs. 0.60 crore
• No plan assets (unfunded); no past service cost during the year

Step 1: Net interest for the year

Net interest = Opening DBO x discount rate = Rs. 8.50 crore x 7.0% = Rs. 0.595 crore

(Since the plan is unfunded, there is no offsetting interest income on plan assets; net interest here is simply interest cost on the obligation.)

Step 2: Expected closing DBO before remeasurement

Step 3: Actual closing DBO per the updated actuarial valuation at 31 March 2025

The actuary's updated valuation at year-end, using the discount rate and salary escalation assumptions applicable at 31 March 2025 (which may have moved from the assumptions used at the start of the year) and reflecting actual employee experience during the year (actual departures, actual salary increases awarded), produces an actual closing DBO of Rs. 9.60 crore.

Step 4: The actuarial loss (remeasurement)

Actuarial loss = Actual closing DBO - Expected closing DBO = Rs. 9.60 - Rs. 9.395 = Rs. 0.205 crore

This Rs. 0.205 crore actuarial loss (the obligation turned out higher than the model predicted, driven by some combination of a lower discount rate at year-end than assumed, higher actual salary increases than assumed, or lower actual attrition than assumed) is recognised in other comprehensive income, not profit or loss.

Income statement (P&L) impact for the year:

Other comprehensive income impact for the year:

Balance sheet at 31 March 2025:

Net defined benefit liability = Rs. 9.60 crore (the actual closing DBO, since the plan is unfunded with no plan assets to net against it).

This is the structure every Indian gratuity note in a listed company's annual report follows: a clean P&L charge (service cost plus net interest) sitting in operating and finance costs respectively, and a separate, unrecycled remeasurement movement sitting in OCI, with the balance sheet liability reflecting the full actuarial position at each reporting date.

---

Ind AS 19 vs IAS 19: The One Genuinely Significant Divergence for Indian Companies

The AS 15 versus Ind AS 19 OCI distinction deserves particular emphasis, since it is the one place where an Indian entity's choice of accounting framework (rather than any difference between IAS 19 and Ind AS 19 themselves, which are otherwise fully converged on this topic) genuinely changes the presentation outcome: under AS 15, still applicable to companies not required to adopt Ind AS, actuarial gains and losses go straight to profit or loss, creating exactly the kind of P&L volatility from bond yield movements that the IAS 19 2011 revision was specifically designed to remove from operating performance under the Ind AS/IFRS framework.

---

What Big 4 Auditors Focus On

Discount rate sourcing and duration matching. Auditors verify that the discount rate has been sourced from an appropriate, current government bond yield reference (typically FBIL) at the specific reporting date, matched to the duration of the obligation, rather than simply rolled forward from the prior year's rate or borrowed from an unrelated valuation.

Attrition assumption support. Given how easily a "conservative-looking" zero or near-zero attrition assumption can actually overstate the obligation, auditors test whether the attrition rate used is genuinely supported by the company's own recent experience data (typically the last two to three years), rather than an arbitrary or unsupported figure.

Updated assumptions following any plan amendment. Where a plan has been amended, curtailed, or settled during the year, auditors specifically test whether the 2018 amendment's requirement, updated assumptions for the remainder of the period, has been applied, rather than the entity continuing to use start-of-year assumptions as though nothing had changed.

Correct P&L versus OCI split. This remains one of the most common presentation errors auditors encounter: service cost and net interest correctly isolated and recognised in profit or loss, with the remeasurement component correctly isolated and recognised in OCI, with no recycling of OCI amounts back to profit or loss in any later period.

Consistency of valuation population and data. Auditors trace the employee census data used in the actuarial valuation (dates of birth, dates of joining, current salary) back to payroll and HR records, since incomplete or stale census data (a commonly cited practical error) directly corrupts the resulting valuation.

---

Dip IFRS Exam Angle

Defined benefit plan questions are among the most calculation-intensive in the entire Dip IFRS syllabus, and the projected unit credit roll-forward is tested with genuine regularity.

Most tested areas:

Building the full DBO roll-forward: opening balance, plus current service cost, plus net interest, plus/minus past service cost (if any), less benefits paid, to arrive at the expected closing balance, then comparing to the actuary's actual closing valuation to derive the remeasurement (actuarial gain or loss).

Correctly splitting the P&L charge (current service cost plus net interest) from the OCI remeasurement (actuarial gains/losses and the excess or shortfall of actual plan asset return over the net-interest-implied return).

Applying the 2018 amendment correctly: recognising that after any mid-year plan amendment, curtailment, or settlement, current service cost and net interest for the remainder of the year must be recalculated using updated assumptions, rather than continuing with the assumptions determined at the start of the year.

Asset ceiling application: recognising that a net defined benefit asset cannot exceed the present value of economic benefits genuinely available to the entity through refunds or reduced future contributions.

Common traps:

Recognising actuarial gains or losses in profit or loss instead of OCI. This is the single most common IAS 19 error in exam scripts.

Attempting to recycle a prior period's OCI remeasurement back through profit or loss in a later period, for instance on plan settlement. Remeasurements are never recycled under IAS 19.

Using the plan's actual or expected investment return (rather than the discount rate) to calculate the interest income component of net interest.

Continuing to use start-of-year assumptions for the remainder of the period after a mid-year plan amendment, ignoring the 2018 amendment's specific requirement to update them.

---

FAQ

Why does the discount rate use government bond yields in India rather than corporate bond yields, when IAS 19 technically prefers high-quality corporate bonds?

IAS 19 requires high-quality corporate bond yields where a deep market in such bonds exists; where it does not (as is the case for sufficiently long-duration, high-quality corporate bonds in India), the standard specifically permits falling back to government bond yields instead. FBIL's G-Sec yield curve is the universally accepted Indian reference for this purpose.

Does an unfunded gratuity plan carry less actuarial risk than a funded one?

No, the actuarial risk (driven by salary escalation, discount rate movements, and demographic experience) is identical regardless of funding status; funding only affects whether there are plan assets to net against the gross obligation on the balance sheet, and whether investment return risk on those assets is also a factor. An unfunded plan actually removes one source of remeasurement volatility (the difference between actual and expected plan asset returns), simply because there are no plan assets generating a return to compare against expectations.

If a company's gratuity plan is fully insured through an LIC group gratuity scheme, does that remove the need for an independent actuarial valuation?

No. An LIC (or any insurer's) certificate alone does not provide the full set of disclosures required under Ind AS 19, including the OCI-based remeasurement split, the DBO and plan asset roll-forwards, sensitivity analysis, and the maturity profile of expected future payments; a separate, dedicated actuarial valuation report is still required to meet Ind AS 19's disclosure requirements even where the underlying benefit itself is fully insured.

How often should the discount rate and other assumptions be updated?

At every reporting date, without exception, since the discount rate specifically must reflect market conditions as at that date, not a rate carried forward from a prior valuation. Interim reporting periods (quarterly results, for instance) may in practice roll forward the annual actuarial valuation with an adjustment for the movement in the discount rate and any other clearly material changes, rather than commissioning an entirely fresh full actuarial valuation every quarter, but the year-end valuation itself must use current, reporting-date assumptions.

Can a company avoid the OCI volatility from actuarial remeasurements by choosing a different accounting policy?

Not under Ind AS 19 or IFRS: the OCI treatment for remeasurements, and the prohibition on recycling them to profit or loss, is a mandatory requirement, not an accounting policy choice available to the entity. The only way this presentation differs is by reporting instead under AS 15 (where applicable and permitted), which routes the same actuarial gains and losses through profit or loss directly, a difference in the underlying financial reporting framework used, not a policy election within Ind AS 19 itself.

Does a higher assumed attrition rate always reduce the defined benefit obligation?

Generally yes for gratuity, since higher attrition means more employees are expected to leave (and stop accruing further benefit, and in some benefit structures may not even qualify for the full benefit if they leave before a minimum service threshold) before reaching the assumed retirement age, reducing the projected years over which the benefit continues to accrue and the projected final salary on which it is based. The precise sensitivity direction and magnitude depends on the specific benefit formula and qualifying conditions, which is exactly why company-specific experience data, rather than a generic industry assumption, genuinely matters here.

---

Enroll with Global Fin X

Defined benefit plan mechanics reward candidates who can build the full DBO roll-forward mechanically and correctly, splitting P&L from OCI at every step, rather than those who understand the concept only in narrative terms. Our programme covers this material with full worked examples grounded in Indian gratuity practice, sensitivity analysis mechanics, exam-style MCQs, and a dedicated LMS for working professionals.

Enroll Now: Dip IFRS Programme

Faculty profile: www.globalfinx.in/manikanta

---

This is Post 57 of the Global Fin X IFRS Series. Previous: IAS 19: Short-Term, Post-Employment and Termination Benefits. Next: Post 58: IAS 19 vs Ind AS 19: Where India Diverges on Remeasurements.