Inflation Calculator

What Is Inflation?

Inflation is the invisible tax that erodes the purchasing power of your money over time. When inflation occurs, every rupee you own buys a smaller percentage of a good or service than it did a year earlier, even though the number of rupees in your account has not changed.

The Reserve Bank of India (RBI) targets CPI inflation at 4%, with a tolerance band of plus or minus 2 percentage points, meaning it aims to keep inflation between 2% and 6% through its monetary policy decisions, primarily by adjusting the repo rate.

How Inflation Affects Purchasing Power

If you keep Rs 1,00,000 in cash for 10 years and inflation averages 6% annually, you will still have exactly Rs 1,00,000 in nominal terms. It would now take approximately Rs 1,79,000 to buy what Rs 1,00,000 bought 10 years earlier.

Your money has effectively lost close to 44% of its purchasing power without a single rupee being spent or stolen. This is why a cash balance, or any account earning less than the inflation rate, carries a real financial cost even though the balance itself never falls.

Figures assume a flat 6% annual inflation rate applied to today's illustrative prices, not a live price feed. Use the calculator above with your own item cost and rate for a precise number.

Inflation Formula: How to Calculate Future Cost

The future cost of an item under inflation follows the same compound growth formula used for investment returns, just applied to prices instead of wealth.

Worked example: a family's monthly grocery bill of ₹15,000 today, at 6% average inflation, becomes ₹15,000 × (1.06)^10 = approximately ₹26,863 in 10 years, an increase of almost 79% without any change in what the family actually buys.

Inflation Formula in Excel: Two Methods

Both methods below give the identical answer; use whichever function you already have memorised.

Reverse Inflation Calculator: What Was an Amount Worth in the Past?

A reverse inflation calculator answers a different question from the one above. Instead of projecting a cost forward, it discounts a present-day amount backward to find its value in an earlier year.

Worked example: Rs 1,00,000 today, discounted back 10 years at an average 6% inflation rate, was worth roughly Rs 55,839 in purchasing-power terms a decade ago. Run the same formula on a dollar or rupee figure from any starting year by entering your own historical average rate above.

This calculator uses one flat rate you supply, not a stored series of historical CPI index values.

For an India-specific historical CPI series by month or year, cross-check the rate you use here against MOSPI's published CPI data before relying on the output for a specific past year.

How Much Return Do You Need to Beat Inflation?

To beat inflation, your investment's nominal return must exceed the inflation rate, and by a meaningful margin once tax is accounted for.

At 6% inflation, a fixed deposit paying 7% nominal interest sounds fine until you subtract tax. For someone in the 30% tax bracket, the post-tax return drops to about 4.9%, which is below inflation.

That investor is losing real purchasing power despite seeing a positive return on the statement.

Use the SIP Calculator to check whether a target monthly investment, growing at an assumed rate, actually outpaces the inflation rate you enter here over the same time horizon.

Real Return vs Nominal Return: What Is the Difference?

Nominal return is the raw percentage your investment grew by, before adjusting for inflation. Real return is what that growth is actually worth in terms of purchasing power, calculated as the nominal return minus the inflation rate.

Figures are broad, commonly-cited ranges for illustration, not a guarantee. Actual returns vary by product, tenure, and market conditions, and fixed deposit and PPF returns shown are pre-tax.

India's Historical Inflation Rate: What Counts as Normal?

India's CPI inflation has moved in a wide range over the last few years. Retail inflation was 6.2% in FY2020-21 as the pandemic disrupted supply chains, then climbed back to 6.7% in FY2022-23.

It eased to 5.4% in FY2023-24 and 4.6% in FY2024-25, touched an eight-year low of 1.6% in July 2025, then rose again to 4.82% in August 2026, per MOSPI data.

For long-term planning, use a rate somewhere between India's recent range of 4.5% and 6.5% as a starting assumption. A single month's figure can be skewed by a temporary food or fuel price shock.

The August 2026 uptick was driven largely by food and beverage prices at 5.95% and transport costs at 4.6%, per MOSPI's monthly CPI release.

RBI Inflation Targeting and the Repo Rate

The Reserve Bank of India controls inflation mainly through the repo rate, the rate at which it lends short-term funds to commercial banks. Raising the repo rate makes borrowing costlier across the economy, which cools demand and slows price rises. Cutting it does the opposite.

Under the flexible inflation targeting framework agreed with the government, the RBI's Monetary Policy Committee (MPC) targets 4% CPI inflation with a tolerance band of 2% to 6%.

The repo rate stood at 5.25% as of the MPC's August 2026 meeting, per the RBI's policy statement.

A rate cut generally makes fixed deposits and savings accounts less attractive relative to inflation, since bank deposit rates tend to move with the repo rate. Check the FD Calculator to see how a specific deposit rate compares against the inflation rate entered here.

How India's CPI Basket Is Weighted

India's Consumer Price Index is built from a weighted basket of goods and services, and food carries the largest single weight in that basket.

Because food carries such a large weight, a poor monsoon or a spike in vegetable prices can move headline CPI noticeably even when every other category is stable.

Urban and rural CPI baskets, published separately by MOSPI, use slightly different weights to reflect different spending patterns.

Core Inflation vs Headline Inflation

Headline inflation is the full CPI number, including food and fuel. Core inflation strips food and fuel out of that number, since both are volatile and swing with monsoon output and global crude prices rather than underlying demand conditions.

The RBI and most economists watch core inflation as a better read on persistent, demand-driven price pressure in the economy.

A high headline number driven purely by a vegetable price spike is treated differently from a high core number, which signals broader pressure across services, housing, and manufactured goods.

Inflation and EPF, PPF Real Returns

EPF currently pays 8.25% and PPF pays 7.1% per annum, both under EEE tax status, meaning contributions, interest, and withdrawal are all tax-free.

Against CPI inflation in the 4.5% to 5% range, both deliver a positive real return, though a narrower one than what equity has historically delivered over 15-20 year horizons.

Run your own EPF projection through the VPF Calculator or PPF Calculator, then apply the inflation rate here to the maturity amount to see its value in today's purchasing power.

Inflation and Mutual Fund Returns in India

Equity mutual funds are the asset class most commonly used in India to outpace inflation over long periods. The companies they hold can raise prices as their own costs rise, passing inflation through to revenue and, over time, to earnings and share prices.

Debt mutual funds and fixed deposits struggle to do the same, since their return is fixed at the time of investment regardless of what inflation does afterward.

Run a fund's actual historical return through the CAGR Calculator, then subtract the inflation rate for that period from this calculator, to see the real return an investor actually earned, not just the headline number in a fund factsheet.

Limitations of This Inflation Calculator

Assumes a constant rate: real-world inflation varies year to year. A single flat assumption smooths over years that may run well above or below it.

Uses one economy-wide number: your own personal inflation rate depends on your spending mix. Education and healthcare costs in India have historically risen faster than the headline CPI, while some categories rise slower.

Does not model lifestyle inflation: the calculator projects the same basket of goods forward. It does not account for spending more as income rises, which is a separate, real effect on a household budget.

Pre-tax investment comparisons: the real-return figures shown do not deduct tax on investment gains, which further reduces the real, in-hand return an investor keeps.

How to Use This Inflation Calculator

1. Enter the current amount: the price or sum of money you want to project forward.
2. Set the inflation rate: use India's recent 4.5-6.5% range, or a category-specific rate if you have one.
3. Choose the time period: the number of years into the future you are projecting.
4. Open Advanced Settings for investing: add a monthly contribution and expected return rate to see nominal vs real wealth growth side by side against rising costs.

Frequently Asked Questions

Disclaimer: This calculator projects future cost and purchasing power using a single, user-supplied inflation rate assumption applied uniformly across the projection period. It does not predict actual future inflation, which varies year to year and depends on factors including monetary policy, global commodity prices, and domestic supply conditions. Real return figures shown are indicative and do not account for tax on investment gains. This calculator is for educational and planning purposes only and does not constitute financial advice. Consult a SEBI-registered investment adviser before making investment decisions.