Investor Corner/The wider picture/Risk, Regulation & Advanced Ideas
5.3.6 Longevity Risk
Longevity risk is the risk of outliving your money. It is particularly important for retirement planning, where equity exposure often needs to continue well past the retirement date itself, not stop the day it begins.
Why retirement can last longer than expected
Improving healthcare and rising life expectancy mean a retirement that begins at 60 can realistically last twenty five years or more. Planning a retirement corpus as though it only needs to last a decade or fifteen years, when it may actually need to last considerably longer, is one of the more common and consequential planning mistakes.
Longevity risk is the possibility of outliving your retirement savings. With improving healthcare and nutrition, life expectancy in India has been rising steadily. A person who retires at 60 today may reasonably expect to live to 85 or beyond, requiring the retirement corpus to sustain 25-30 years of withdrawals. Underestimating lifespan and overspending in early retirement can leave the retiree without adequate resources in their most vulnerable years.
Why shifting entirely to cash at retirement can backfire
A common instinct is to move a retirement corpus entirely into very safe, low-growth instruments the moment retirement begins. For a genuinely long retirement, this can actually increase longevity risk rather than reduce it, since a corpus earning only enough to barely keep pace with inflation has little room left to grow and support several more decades of withdrawals.
The compounding effect of inflation over 25-30 years makes longevity risk particularly acute. At 6% inflation, the purchasing power of money halves every 12 years. A monthly expense of ₹50,000 today becomes ₹1,60,000 in 20 years. A retirement corpus that seems generous at 60 may be inadequate at 80 if inflation was not adequately factored into the original plan. This is why retirement planning in India must assume a longer lifespan and higher cumulative inflation than most people instinctively estimate.
A more balanced approach
Many retirement plans retain some meaningful equity allocation well into retirement, specifically to help the corpus keep growing enough to support withdrawals over what could be a genuinely long remaining lifespan, while pairing that with a cash or short duration buffer to manage sequence of returns risk along the way.
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Mitigation strategies include maintaining a meaningful equity allocation throughout retirement (not shifting entirely to debt at retirement), purchasing an annuity to cover basic fixed expenses (NPS mandates a partial annuity for this reason), building a margin of safety into withdrawal rates (withdrawing 3-4% of corpus rather than 5-6%), and delaying retirement by even 2-3 years if the corpus is borderline adequate. Each additional year of work contributes both an extra year of savings and one fewer year of withdrawals, making the impact disproportionately large relative to the sacrifice. Planning for too long a retirement is far safer than planning for too short a one.