retirement is not a number. it is a calculation. and most people get it wrong because they use today’s expenses without adjusting for what those expenses will become in 20 or 30 years.
a 40-year-old spending ₹1 lakh a month today needs anywhere between ₹9.3 crore and ₹14 crore to retire at 60, depending on how long they live and what inflation assumption is used . the difference is not small. the reason is simple. inflation does not stop.
at 6% inflation, ₹1 crore today becomes worth only ₹31.2 lakh in 20 years . your expenses double every 12 years at that rate. healthcare costs rise even faster.
the corpus you need depends on five things. current expenses. years to retirement. inflation. post-retirement returns. and how long you will live.
the five variables that decide your corpus
every retirement calculation uses these inputs. get them wrong and the number is useless.
current monthly expenses. this is what you actually spend. not what you think you spend. rent. groceries. utilities. school fees. medical. transport. everything.
years to retirement. if you are 40 and want to retire at 60, that is 20 years. if you are 35, it is 25 years.
inflation. this is the silent killer. india’s average inflation between 1992 and 2024 was 6.8% . a 6% assumption is reasonable. some planners use 7% for urban india .
post-retirement returns. this is what your corpus earns after you stop working. a balanced portfolio might earn 7-8%. if inflation is 6%, your real return is only 1-2% .
years in retirement. plan for at least 30 years. life expectancy is rising. retiring at 60 means you might live until 90 .
two methods to calculate your corpus
method one. the 4% rule.
this is the simplest. take your annual expense at retirement. divide by 0.04. that is your corpus.
example. ₹1 lakh monthly expense today. 20 years to retirement. 6% inflation. future monthly expense is ₹3.2 lakh. annual is ₹38.4 lakh. corpus needed is ₹38.4 lakh divided by 0.04, which is ₹9.6 crore.
the 4% rule gives a higher number. it is conservative. it builds in a buffer .
method two. the real return method.
this accounts for the fact that your corpus earns returns while you withdraw.
formula. corpus = annual expense × [1 – (1 + r)^(-n)] / r. where r is the real return and n is years in retirement.
example. ₹60,000 monthly expense today. 22 years to retirement. 6% inflation. future monthly expense is ₹2.13 lakh. annual is ₹25.6 lakh. post-retirement return is 8%. real return is 2%. years in retirement is 30. corpus = ₹25.6 lakh × 22.4 = ₹5.7 crore .
the two methods give different numbers. the 4% rule gives ₹6.4 crore. the real return method gives ₹5.7 crore. the difference is the buffer.
real numbers. what people actually need
| current monthly expense | corpus needed (age 40, retire at 60, live to 80) | monthly sip needed at 12% return |
|---|---|---|
| ₹50,000 | ₹4.64 crore | ₹53,700 |
| ₹1 lakh | ₹9.29 crore | ₹1,07,400 |
| ₹2 lakh | ₹18.57 crore | ₹2,14,800 |
| ₹3 lakh | ₹27.86 crore | ₹3,22,200 |
assumptions. 7% inflation. 12% return before retirement. 0% real return after retirement .
these numbers are higher than what most people expect. a ₹1 crore corpus is not enough for urban india. at 6% inflation, ₹50,000 monthly withdrawals will last only 9-11 years .
why inflation is the real risk
inflation does not just make things expensive. it erodes the value of what you have.
₹1 crore today is worth ₹31.2 lakh in 20 years at 6% inflation . that is the same as losing 69% of your purchasing power.
fixed deposits and bonds feel safe. but their real returns are barely positive. over the long term, fds gave 7.7% nominal and only 1.4% real return. bonds gave 7.6% nominal and 1.1% real .
a retirement portfolio that is all fds and bonds will struggle to keep pace with inflation over 30 years. the money will run out.
what asset allocation works
most experts suggest keeping some equity even after retirement. the exact percentage varies.
at 60, the “100 minus age” rule suggests 40% equity . some planners suggest 30-45% . others are more conservative at 15-35% .
the reason is simple. a 60-year-old may live another 30 years. a pure debt portfolio cannot sustain that. equity provides growth to beat inflation.
a three-bucket structure is common. bucket one. 1-3 years of expenses in liquid funds. bucket two. 3-7 years in short-term debt. bucket three. 7+ years in equity .
spend from bucket one. refill it from bucket two. refill bucket two from bucket three in good years. leave bucket three alone in bad years.
how much to save each month
the earlier you start, the less you need to save.
a ₹10 crore target by age 60 requires ₹8,416 per month if you start at 20. it requires ₹1,00,085 per month if you start at 40 .
that is a 12x difference. not because of intelligence. not because of market timing. just because of time.
frequently asked questions
1. is ₹1 crore enough to retire in india?
for most urban indians, no. at 6% inflation, ₹1 crore in withdrawals of ₹50,000 per month lasts only 9-11 years. a comfortable retirement of 25-30 years needs much more .
2. how much corpus do i need for ₹50,000 monthly expenses?
a 40-year-old spending ₹50,000 per month today needs roughly ₹4.64 crore to retire at 60 and live to 80. if they live to 90, the number is higher .
3. what is the 25x rule?
the 25x rule says save 25 times your annual expenses. experts in india suggest 30-33x because inflation is higher and retirement periods are longer .
4. why is inflation so important in retirement planning?
inflation reduces purchasing power. ₹1 crore today is worth ₹31.2 lakh in 20 years at 6% inflation. if your corpus does not grow faster than inflation, you will run out of money .
5. should i keep equity after retirement?
yes, most experts say 20-45% equity is appropriate at retirement. a pure debt portfolio will struggle to beat inflation over a 30-year retirement .
