Key takeaways
- Retirement calculators inflate today’s spending to the first year of retirement, then often keep inflating during retirement.
- The corpus is sized to a future rupee, not to today’s rupee.
- Inflation and investment return are different inputs. A high return assumption does not cancel a high inflation assumption automatically.
- Actual inflation will not match the number you type.
If you need ₹50,000 a month today, you will not need ₹50,000 a month in 2046 in the same shopping basket. Inflation is the name for that drift. Retirement planning that ignores it funds yesterday’s prices with tomorrow’s life.
Two clocks: prices and investments
Prices of the life you want to fund tend to rise (inflation). A corpus you invest may also rise (return). The planner needs both because they answer different questions. Return is “what might this pile become?” Inflation is “how big must the pile’s withdrawals be?” Subtracting them in your head as a single “real return” is possible, but hiding inflation as an input makes the corpus look smaller than the spending you described.
A side-by-side sketch
Take ₹50,000 a month today and 25 years to retirement. At 4% inflation, that monthly need at retirement is much lower than at 7% inflation. The corpus required to support the higher path is not a little higher — it is a different plan. Run the retirement planner twice, changing only inflation, and keep ages and returns fixed. The monthly investment gap is the cost of pretending prices stay still.
The inflation calculator is the small version of the same idea: one amount, one rate, one horizon. Use it when a goal is quoted in today’s rupees and you need tomorrow’s rupees before you open a SIP tool.
Try it yourselfInflate a rupee amountSee what today’s expense becomes after a chosen inflation rate and number of years.Medical and education inflation
Headline CPI is an average basket. Health costs and some education costs have, in many periods, moved faster than that average. Finaura does not invent a medical-inflation index. If those items dominate your retirement spending, using a slightly higher inflation input in the planner is a way to stress-test — not a forecast.
What not to do
- Fund a 30-year retirement with a 0% inflation assumption “to be conservative on costs” — that understates costs.
- Offset a scary inflation number by typing an equally scary investment return you do not actually expect.
- Treat last year’s CPI print as a 25-year law.
How Finaura uses the input
The retirement planner’s methodology is summarised on the methodology page. In short: expenses are grown to retirement, a corpus is estimated from post-retirement withdrawals and returns, existing savings are grown to retirement at the pre-retirement rate, and a monthly contribution is solved for the gap. Inflation is not a hidden fudge factor; it is an explicit field so you can see it bite.