Employee benefits: NIF D-3 and IAS 19

Employee benefits are all forms of consideration an entity provides in exchange for services or on termination of employment. Most are recognized as an expense when earned, with no further complication. Those paid years after the service is rendered, such as the seniority premium or a pension, require estimating how much will be paid, when and with what probability, and bringing it to present value: that is the actuarial work.

In Mexico, the applicable standard for entities reporting under NIF (Mexican Financial Reporting Standards) is NIF D-3, issued by CINIF; its revised version took effect on January 1, 2016 and was amended by the 2017 Improvements to NIF. Entities reporting under IFRS, including issuers listed on the BMV (Mexican Stock Exchange) and subsidiaries of foreign groups, apply IAS 19 (NIC 19). Both standards share the projected unit credit method and much of the structure, but they differ on points that change the numbers: the recognition of remeasurements, the discount rate and deferred PTU (employee profit sharing).

This page complements those on pension mathematics, which develops annuities and commutation functions, and on mortality tables, a core input to every valuation.

NIF D-3 distinguishes three broad groups. Short-term direct benefits (salaries, vacations, vacation premium, aguinaldo year-end bonus, bonuses, PTU) are paid within twelve months after the reporting date and recognized without discounting. Long-term direct benefits, such as long-service awards or compensated absences paid after twelve months, are valued actuarially, but their remeasurements go straight to profit or loss. Post-employment benefits (pensions, seniority premium, retiree medical care, retiree life insurance) are paid after employment ends.

Termination benefits are paid as a result of the entity's decision to end employment before the normal retirement date, or the employee's decision to accept an offer of benefits in exchange for termination. NIF D-3 makes a distinction that matters in Mexico: if there are preexisting conditions for payment, whether by contract, entity practice or law in recurring circumstances, the benefit is treated as post-employment and valued with the projected unit credit method. If there are none, it is a termination benefit and is recognized when the entity can no longer withdraw the offer or when it recognizes a restructuring.

Post-employment plans are divided into defined contribution plans, where the entity's obligation is limited to contributing and the expense is the contribution for the period, and defined benefit plans, where the entity bears the actuarial and investment risk. Hybrid plans, common in Mexico, combine an individual account with a defined benefit floor and are valued as defined benefit for the guaranteed portion.

Article 162 of the LFT grants permanent employees a seniority premium of twelve days' wages for each year of service. It is paid to those who leave voluntarily with at least fifteen years of service, to those who leave for justified cause and to those who are dismissed, regardless of whether the dismissal was justified; it is also paid to beneficiaries on death. The base wage is capped under articles 485 and 486: it cannot be lower than the minimum wage or higher than twice the minimum wage for the geographic area. With the 2026 general minimum wage of 315.04 pesos per day, the cap is 630.08 pesos; in the Northern Border Free Zone, at 440.87, it is 881.74.

Severance for unjustified dismissal is governed by articles 48 to 50. The employee may request reinstatement or severance of three months' wages, plus back pay for up to twelve months. When the employer is exempt from reinstating (article 49: less than one year of service, employees in positions of trust, temporary workers, among others), it also pays twenty days' wages per year of service in open-ended employment relationships (article 50). Unlike the seniority premium, these amounts are calculated on the integrated wage, without the two-minimum-wage cap.

In the valuation, the seniority premium is a post-employment benefit with a formula linear in years of service. Statutory severance is valued as post-employment when the entity has a practice of paying it on separations that do not stem from a restructuring, which is common; otherwise it is recognized when it occurs. Private pension plans supplement IMSS (Mexican Social Security Institute) pensions under the Ley 73 or Ley 97 regimes and may be registered with CONSAR (National Retirement Savings Commission) in its Electronic Pension Plan Registry (SIREPP).

Both standards require the projected unit credit (PUC) method, known in Mexico as crédito unitario proyectado (CUP). Each year of service gives rise to an additional unit of benefit, and each unit is measured separately. The defined benefit obligation (OBD, the DBO) is the present value, at the valuation date, of the portion of the projected benefit attributable to service already rendered. Projected means the benefit is calculated with the salary expected at the time of payment, not the current salary.

The valuation runs through each cause of exit (death, disability, dismissal, resignation and retirement) and each future year. For each combination it calculates the probability that the exit occurs that year, the benefit that would be paid based on the projected salary and service at that date, the proportion attributable to service at the valuation date, and the discount factor. For the seniority premium the benefit formula is linear in years of service, so the attribution is simply current service divided by service at exit.

If the benefit formula assigns a materially higher level to later years (for example, a plan that pays only after 30 years), the attribution is made on a straight-line basis from the date service first leads to benefits until the date when further service no longer leads to material additional benefits.

The net periodic cost of a defined benefit plan has three components in profit or loss: current service cost, net interest on the net defined benefit liability or asset (PNBD or ANBD), and past service cost from amendments, curtailments or settlements, which is recognized immediately. Net interest is the discount rate applied to the OBD less plan assets; in other words, the return on assets is recognized in profit or loss at the discount rate, not at the expected rate.

Remeasurements are the differences between expected and observed outcomes: actuarial gains and losses on the OBD from changes in assumptions and from experience, the difference between the actual return on assets and interest at the discount rate, and changes in the effect of the asset ceiling. For post-employment benefits they are presented in other comprehensive income (OCI, ORI in Spanish). For long-term direct benefits they go to profit or loss.

The central difference between the standards lies in what happens next. Under IAS 19, remeasurements recognized in OCI are not recycled to profit or loss. Under NIF D-3 they are recycled to net income based on the average remaining working life of employees, and since the 2017 Improvements to NIF the entity may elect to recognize them directly in profit or loss as they arise.

The discount rate is the most sensitive assumption. IAS 19 requires using market yields at the reporting date on high-quality corporate bonds and, in countries without a deep market in such bonds, on government bonds. NIF D-3, following the 2017 Improvements to NIF, allows a choice between government bonds and high-quality corporate bonds with a deep market. In Mexico it is common to use the fixed-rate federal government bond curve (Bonos M) for nominal assumptions, or the Udibonos curve when working in real terms, taking the term consistent with the duration of the obligation rather than a single short-term rate.

Demographic assumptions include mortality for active employees and retirees, disability, turnover by age or service (separating dismissals, which pay the seniority premium, from resignations, which pay only after fifteen years) and retirement ages. Turnover usually matters more than mortality for the seniority premium and must be calibrated to the company's own experience. Financial assumptions include inflation, salary increases and, for the seniority premium, growth in the minimum wage that sets the cap; in years when minimum wage increases far exceed inflation, such as 2026, this assumption changes the liability.

Consistency matters more than any single number: a nominal discount rate must be paired with nominal increases and a real rate with real increases. Assumptions must be unbiased and mutually compatible, and the actuarial report must include a sensitivity analysis for each one, as both standards require in their disclosures.

NIF D-3 and IAS 19 converged on the essentials in 2016: elimination of the corridor, immediate recognition of past service cost, net interest and the asset ceiling. The remaining differences are limited but not trivial, and anyone valuing a Mexican subsidiary that reports under NIF locally and under IFRS to its parent must produce two sets of figures.

PTU is a distinctly Mexican feature. Since the 2021 reform, article 127, section VIII of the LFT limits each employee's profit share to three months' wages or the average PTU received over the last three years, whichever is more favorable. NIF D-3 treats PTU as a direct benefit and requires recognizing deferred PTU using the asset and liability method, analogous to deferred taxes. IAS 19 has no specific rule on deferred PTU; under IFRS, PTU is recognized as a short-term benefit when earned, and any recognition of deferred effects requires a documented accounting policy.

In Mexico, valuing employee benefit liabilities is effectively mandatory for any company that issues audited financial statements, because the seniority premium exists by law even without a plan. Midsize companies usually commission annual valuations of the seniority premium and statutory severance; large companies add defined benefit, defined contribution or hybrid pension plans, and retiree medical benefits. Many companies have moved from defined benefit to defined contribution to transfer longevity and interest rate risk, which creates actuarial work in the transition and in valuing vested rights.

The interaction with social security shapes plan design: employees under the IMSS Ley 97 regime receive a pension based on their individual account, with replacement rates that motivate supplementary plans, while for the transition generation under Ley 73 the private plan is usually integrated with the IMSS pension. CONSAR maintains the Electronic Pension Plan Registry, whose aggregate data show the size and type of private sector plans.

The profession has AMAC guides for valuing employee benefit liabilities and CONAC standards; internationally, IAA ISAP 3 addresses employee benefits under IAS 19 (see actuarial standards).