What a fixed ₹50,000 a month buys after 10, 20 and 30 years

The question behind the number

Many people near retirement describe their plan as "I need ₹50,000 a month". That is a statement in today's rupees. A pension, annuity or fixed deposit interest that pays ₹50,000 every month for 30 years pays the same amount at the start and at the end. Its buying power does not stay the same.

This post works the arithmetic. It is a companion to how inflation eats your savings and what ₹1 crore in 20 years is worth today, applied to a monthly income.

How to read the table

To find what a fixed amount is worth in today's money after some years, divide it by (1 + inflation) raised to the number of years. The inflation rates here are assumptions for illustration, not forecasts.

₹50,000 a month in today's buying power

At 5% inflation, a ₹50,000 payment after 20 years buys what about ₹18,844 buys today, roughly 38% of the original. At 6%, after 30 years it buys what about ₹8,706 buys now, under a fifth.

Nothing in the payment changed. Only the prices around it did.

The same goal in the other direction

Flip the question: how much income do you need then to live like ₹50,000 today? Multiply by (1 + inflation) raised to the years.

• At 5% inflation, you would need about ₹81,400 a month after 10 years (50,000 × 1.629).
• After 20 years you would need about ₹1,32,700 (50,000 × 2.653).
• After 30 years you would need about ₹2,16,100 (50,000 × 4.322).

At 6%, the 30-year figure rises to about ₹2,87,200 (50,000 × 5.743). A small change in the assumed rate moves the answer by tens of thousands of rupees, which is why it is worth testing both.

What this means for a plan

• Flat income is a shrinking income. A plan whose payment never rises is quietly asking you to spend less each year in real terms.
• Early years look easy, later years bite. Because inflation compounds, most of the erosion arrives late, just when health costs tend to rise.
• Some of the money must keep growing. Withdrawal plans that let the payout rise, such as a systematic withdrawal plan, are set up for that. The SWP calculator walkthrough shows how long a corpus lasts for a given payout.
• Different expenses inflate differently. Medical and education costs have often risen faster than the general index; see education cost inflation. Use a separate rate for them in your plan.
• Stress-test the plan. Run it at a lower and a higher inflation rate than you expect. If it only works at the optimistic rate, it is fragile.

A simple exercise

1. Write your monthly spending in today's rupees.
2. Multiply by the table figures above for 10, 20 and 30 years at 5% and 6%.
3. Ask whether your planned income streams rise, stay flat or fall over the same period.
4. Mark any stream that stays flat. That is where the gap will open.

You can run your own numbers on the inflation calculator and the retirement calculator.

This post is educational, not financial advice. Inflation rates are assumptions for illustration. Figures are rounded to the nearest rupee.