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Modelling Pension Liabilities Under Alternative Salary Growth Assumptions

Abstract

Pension liabilities represent the financial obligations that pension schemes are expected to meet in respect of benefits payable to employees and retirees. Salary growth is an important assumption in pension valuation because future pension benefits are often linked to employees’ salaries at retirement or during their period of service. Changes in salary growth assumptions can therefore influence the estimated value of pension obligations and the funding requirements of pension schemes. Accurate modelling of these liabilities is essential for effective pension planning and financial sustainability. The study examines the modelling of pension liabilities under alternative salary growth assumptions. It focuses on how different rates of salary increase affect the projected value of future pension benefits and the corresponding liabilities of pension schemes. The study considers salary progression over employees’ working lives and evaluates how variations in assumed salary growth rates may alter pension obligations. It also examines the sensitivity of pension liabilities to changes in salary growth assumptions. The study will consider important actuarial factors such as employees’ current salaries, expected salary increases, years of service, retirement age, pension benefit formulas, discount rates, mortality assumptions, and expected periods of benefit payment. Alternative salary growth scenarios, including low, moderate, and high salary growth assumptions, will be modelled to determine their effects on projected pension liabilities. Actuarial present value techniques and pension valuation models will be applied to estimate the financial obligations associated with each scenario. A quantitative actuarial modelling approach will be adopted for the study. Relevant employee and pension data will be used to develop projections of future salaries and pension benefits under different salary growth assumptions. The projected liabilities will be estimated using actuarial valuation techniques, discounted cash flow methods, and sensitivity analysis. Comparative analysis will then be used to assess differences in pension liabilities across the alternative salary growth scenarios. The study is expected to show that pension liabilities are sensitive to changes in salary growth assumptions. Higher salary growth rates are expected to produce higher projected final salaries and consequently increase the value of salary-related pension benefits and pension liabilities. Lower salary growth assumptions are expected to result in relatively smaller projected liabilities. The findings may also indicate that even modest changes in salary growth assumptions can produce substantial differences in long-term pension obligations because of the extended period over which pension benefits accumulate. The study is expected to provide useful information for actuaries, pension fund managers, employers, and other stakeholders involved in pension valuation and financial planning. Understanding the sensitivity of pension liabilities to salary growth assumptions can support more realistic actuarial valuations, improve funding decisions, and strengthen long-term pension risk management. The results may also encourage pension schemes to regularly review salary growth assumptions in response to economic conditions, wage trends, and changes in employment patterns. The study concludes that appropriate salary growth assumptions are essential for reliable pension liability modelling and sustainable pension management. It is therefore recommended that pension schemes use realistic and regularly reviewed salary growth assumptions and conduct sensitivity analysis to assess the effect of alternative assumptions on pension obligations. Actuaries and pension managers should also consider multiple salary growth scenarios when evaluating funding requirements and making long-term pension planning decisions.

Keywords: Pension liabilities, salary growth, salary assumptions, actuarial valuation, pension valuation, retirement benefits, pension obligations, salary progression, actuarial modelling, discount rates, pension funding, sensitivity analysis, employee benefits, retirement planning, pension sustainability.