Educational Purpose Only: Actual inflation varies. Results are estimates based on the rate you enter.
How inflation affects your money
Inflation is the rate at which the general price level of goods and services rises over time, reducing the purchasing power of money. If inflation is 6% per year, something that costs ₹1,00,000 today will cost approximately ₹1,79,085 in 10 years. Conversely, ₹1,00,000 today will only buy what ₹55,839 bought 10 years ago.
India's average CPI (Consumer Price Index) inflation has been around 5–7% over the past decade. The RBI targets inflation in the 2–6% band. For financial planning, using 6% as a conservative long-term inflation assumption is a common approach.
Why you must beat inflation with investments
If your savings account earns 3.5% while inflation runs at 6%, you are effectively losing purchasing power every year. This is why financial planners emphasise investing in assets that can grow faster than inflation — equity mutual funds, stocks, and real estate historically outpace inflation over long periods, while fixed deposits and savings accounts often lag it.
Use this calculator alongside a SIP or lump sum calculator to check whether your projected investment returns will outpace inflation and grow your real wealth over time.
The formula behind future and present value
The Future Value mode above runs the standard compounding formula:
This tells you how many rupees you will need at a future date to buy exactly what today's rupees buy right now. The Past Value mode runs the same formula the other way — dividing instead of multiplying:
This is what tells you how a rupee figure that stays fixed on paper — a flat pension, a fixed-return insurance payout, cash sitting idle — quietly shrinks in what it can actually buy as the years pass, even though the number itself never changes.
Worked example: why the growth isn't a straight line
Say a household spends ₹50,000 a month today. At a steady 6% average inflation, that same monthly lifestyle costs approximately ₹1,60,357 in 20 years (50,000 × 1.0620 ≈ 1,60,357). The table below shows the amount at five-year checkpoints:
| Year | Monthly Cost (6% inflation) | Rise Over Previous 5 Years |
|---|---|---|
| Today | ₹50,000 | — |
| Year 5 | ₹66,911 | ₹16,911 |
| Year 10 | ₹89,542 | ₹22,631 |
| Year 15 | ₹1,19,828 | ₹30,286 |
| Year 20 | ₹1,60,357 | ₹40,529 |
Notice the rupee increase itself keeps getting bigger — ₹16,911 in the first five years versus ₹40,529 in the last five, nearly two-and-a-half times as much. That is the part people underestimate: inflation doesn't add a fixed rupee amount each year, it multiplies whatever the cost has already grown to. The rate stays the same at 6%, but because it's applied to a larger base every year, the absolute rupee jump keeps accelerating. A quick straight-line guess — just adding 6% of ₹50,000 for each of the 20 years — would land near ₹1,10,000, well short of the actual ₹1,60,357.
Why this matters for retirement planning
The most common retirement-planning mistake is sizing a target corpus off today's monthly expenses and ignoring the years of inflation between now and retirement. Someone retiring in 20 years who assumes they'll need to fund ₹50,000/month is planning for a lifestyle that will actually cost roughly ₹1,60,357/month by then — over three times as much. A corpus built on the smaller, un-adjusted figure runs out far earlier than expected, often just when medical costs in old age are rising fastest. Run your numbers through the retirement calculator to size a corpus against your inflation-adjusted future expenses, not today's.
What inflation rate should you actually assume?
India's long-run CPI inflation has broadly tracked the 4–6% range over extended periods, and the RBI's formal inflation-targeting band is 2–6%. Treat these as background context rather than a number to plug in blindly — inflation isn't uniform across categories. Education and healthcare costs, in particular, have historically risen faster than general CPI, sometimes into double digits in a given year, so a goal tied specifically to school fees or medical expenses deserves a higher assumed rate than everyday household spending. Whatever figure you use in the calculator above, treat it as your own realistic estimate for that specific goal, not a fixed constant.
Frequently Asked Questions
What is a realistic inflation rate to use for planning?
India's average CPI inflation has been around 5–7% over the past decade. For conservative financial planning, using 6% per annum is a common assumption. For specific categories like healthcare or education, inflation has historically been higher (8–10%), so use a higher rate when planning for those goals.
How does inflation affect retirement planning?
Inflation is one of the biggest risks in retirement planning. If you need ₹50,000/month today and inflation averages 6%, you'll need ₹1,60,357/month in 20 years to maintain the same lifestyle. Your retirement corpus must be large enough to fund these inflation-adjusted expenses for the full retirement period.
What is the difference between CPI and WPI inflation?
CPI (Consumer Price Index) measures price changes for a basket of goods and services consumed by households — relevant for retail inflation that affects your daily expenses. WPI (Wholesale Price Index) tracks prices at the wholesale level before they reach consumers. RBI uses CPI as its primary inflation benchmark.
How can I protect my savings from inflation?
To beat inflation, your investments must grow faster than the inflation rate. Equity mutual funds, stocks, and real estate have historically outpaced inflation over long periods. Fixed deposits and savings accounts often earn less than inflation (negative real returns). Diversifying across asset classes with a focus on equity for long-term goals is a proven inflation-beating strategy.
Related Calculators
This calculator is for educational and illustrative purposes only. Actual inflation rates vary and are not guaranteed. Results are based on the inflation rate you enter and should not be treated as financial advice.