Picture yourself as a research analyst sitting with a client, helping them map out their retirement corpus. They confidently assert that Rs. 1 lakh per month will be ‘more than enough’ for their post-retirement life, assuming they retire in 15 years. As a professional, you recognize the immediate flaw: they are visualizing current-day purchasing power against a future requirement, completely ignoring the erosive impact of compounding inflation over a decade and a half.
In your model, you must adjust that Rs. 1 lakh by an inflation rate—typically 6% in an Indian context—to arrive at the true nominal requirement, which would actually be closer to Rs. 2.4 lakh by then.
Compounding inflation acts like compound interest in reverse, eroding the value of the rupee exponentially over time. While investment returns grow a portfolio, inflation shrinks the utility of the wealth accumulated within that portfolio. In financial planning, failing to account for this means your client will likely face a severe shortfall in their later years.
If you plan for a static amount, you are essentially betting that the cost of milk, medical expenses, and utilities will remain frozen in time, an assumption that rarely holds true in a developing economy like India.
From a valuation perspective, this is identical to calculating the terminal value in a DCF model, where you must account for long-term growth rates to prevent underestimating future obligations. When you build a retirement model, you must demonstrate the ’nominal vs. real’ gap to your client. Show them that even if their investments yield a nominal return of 9%, the real rate of return is effectively 3% when accounting for inflation.
This distinction is critical for setting realistic savings targets and managing their expectations regarding portfolio risk, as it highlights why they cannot simply park funds in low-yield savings accounts.
Consider a case where a client plans to spend Rs. 50,000 monthly today, but expects to live for 25 years post-retirement. If you do not escalate this expense by inflation annually, your retirement model will suggest they need a corpus that runs out of money within the first decade of their retirement. By applying the Future Value formula correctly, you transform their abstract retirement dreams into a rigorous, quantitative strategy.
This professional diligence prevents the ‘retirement cliff’ where an individual realizes too late that their nest egg cannot sustain their required lifestyle due to price escalations.1 2
Nuance
Check Your Understanding
An analyst is calculating the required retirement corpus for a client who currently spends Rs. 80,000 per month. If the client intends to retire in 12 years and assumes an average annual inflation rate of 7%, what is the approximate nominal monthly expense required at the point of retirement?
Which of the following describes the correct approach when modeling retirement expenses over a 25-year distribution phase?
This is a companion read for Section 4.2 — Financial Goals and Retirement from PASS Investment Adviser (Level 2) by Akhilesh Gururani, available on Amazon Kindle.
Copyright © 2026 Akhilesh Gururani. All rights reserved.
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The real rate of return is defined as the nominal interest rate adjusted for inflation, typically calculated using the Fisher equation: (1 + Nominal) / (1 + Inflation) - 1. ↩︎
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Longevity risk in India is increasingly prevalent due to rising healthcare quality, meaning retirement models must often account for a 30-year distribution phase rather than the traditional 20-year estimates. ↩︎