Inflation calculator guide
What is an Inflation Calculator?
An Inflation Calculator shows how the purchasing power of money changes over time. You enter an amount, an assumed inflation rate and a number of years. The calculator then shows two things: what that amount will need to be in the future to buy the same goods and services, and what today’s amount will be worth in the future after inflation erodes its value.
Inflation is the rate at which prices rise. When prices rise, each rupee buys less than before. A salary that feels comfortable today may not cover the same lifestyle ten or twenty years from now. The inflation calculator makes that erosion visible, so you can plan your savings, investments and retirement corpus accordingly.
India’s Consumer Price Index (CPI) inflation was 3.21% in February 2026 and 3.40% in March 2026, based on the new CPI series with base year 2024=100[reference:0][reference:1]. Wholesale Price Index (WPI) inflation was 9.87% in June 2026[reference:2]. Over the long term, Indian inflation has averaged around 5% to 7%, depending on the period and the index used[reference:3]. The calculator lets you test different rates so you are not dependent on a single assumption.
What this calculator shows you
- Future cost — how much a present expense will cost after inflation.
- Future value of money — what today’s amount will be worth in the future in today’s purchasing power.
- Loss in purchasing power — the percentage of value eroded by inflation.
- Real return — the return on an investment after subtracting inflation.
- Year-wise table — how the value changes each year.
- Reverse calculation — what a future amount is worth in today’s money.
- Multiple scenarios — compare 4%, 5%, 6% and 7% inflation side by side.
Tip: Inflation compounds just like interest. A 6% inflation rate halves the purchasing power of money in about 12 years. If your investments earn less than inflation, your real wealth is shrinking even if the nominal balance is growing. Always calculate the real return, not just the nominal one.
How to use the inflation calculator
- Enter the current amount — a monthly expense, a lump sum, or a future goal.
- Enter the assumed annual inflation rate. In India, 5% to 6% is a common long-term assumption, but you can test 4%, 5%, 6% and 7%.
- Enter the number of years.
- Choose whether you want the future cost of a present expense, or the present value of a future amount.
- Read the result. The calculator shows both the nominal future amount and the purchasing-power-adjusted value.
- Change the inflation rate and tenure to see how sensitive the result is.
- Use the output to set savings targets, estimate retirement needs and evaluate whether your investments are beating inflation.
Inflation formulas
Future cost (what a present expense will become):
Future Cost = Present Cost × (1 + Inflation Rate)n
Future value of money (what today’s amount will be worth):
Future Value = Present Value ÷ (1 + Inflation Rate)n
Real return on an investment:
Real Return = [(1 + Nominal Return) ÷ (1 + Inflation Rate)] − 1
- n — number of years
- Inflation Rate — annual rate in decimal (6% = 0.06)
Example: If monthly expenses are ₹50,000 today and inflation averages 6%, then in 10 years the same expenses will cost ₹50,000 × (1.06)10 ≈ ₹89,542. In 20 years, they will cost ₹50,000 × (1.06)20 ≈ ₹1,60,357. The calculator does this compounding for you.
For real return, if a fixed deposit earns 7% and inflation is 6%, the real return is [(1.07 ÷ 1.06) − 1] × 100 ≈ 0.94%. The nominal gain looks healthy, but after inflation the purchasing power has barely moved[reference:4].
CPI vs WPI: which inflation matters?
India publishes two main inflation measures: the Consumer Price Index (CPI) and the Wholesale Price Index (WPI). They track different baskets and serve different purposes.
Point
CPI (Consumer Price Index)
WPI (Wholesale Price Index)
What it tracks
Retail prices paid by consumers
Wholesale prices of goods traded in bulk
Base year
2024 = 100 (revised from 2012)
2022-23 = 100
Coverage
Goods and services, including food, housing, health, education
Primary articles, fuel and power, manufactured products
Published by
National Statistics Office (MoSPI)
Office of the Economic Adviser, Ministry of Commerce & Industry
Use for personal planning
Better — reflects what households actually pay
Better for business and producer cost analysis
For personal financial planning, CPI is the more relevant measure. It reflects the cost of the basket of goods and services that an average household consumes. WPI is useful for understanding cost pressures at the producer level but does not directly reflect retail prices.
The CPI base year was revised from 2012 to 2024 in early 2026, with an expanded basket of 358 items and updated weights[reference:5][reference:6]. The weight of food and beverages declined from 42.61% to 36.75%, reflecting changing consumption patterns[reference:7]. This revision makes the CPI a more accurate reflection of current household spending.
India inflation: recent and historical trends
Period
CPI inflation (average)
Context
FY 2022-23 6.7% Post-pandemic supply disruptions, global commodity spike FY 2023-24 5.4% Moderating food and fuel prices FY 2024-25 4.6% Stable food prices, RBI rate actions FY 2025-26 (Apr–Dec) ~1.8% under new series Sharp fall in food inflation, base effects Feb 2026 3.21% Increase of 47 basis points over January Mar 2026 3.40% Food and beverages drove the rise Long-term average (1960–2025) 7.23% Includes periods of very high inflation in the 1970s and 1990s
Sources: MoSPI CPI press releases, RBI Bulletin, historical inflation data[reference:8][reference:9]. The 2025-26 figures use the new CPI 2024 base series. Older figures use the 2012 base series.
For long-term planning, a 5% to 6% inflation assumption is reasonable for India. However, education and healthcare inflation often runs higher — sometimes 8% to 10% — because these services have a higher wage component and less productivity gain. Use a higher rate for those specific goals.
Illustrative examples
Sample calculations. Your actual results depend on the inflation rate and tenure you choose.
Current amount
Inflation rate
Years
Future cost
Value in today’s money
₹50,000 monthly
6%
10
≈ ₹89,542
≈ ₹27,920
₹50,000 monthly
6%
20
≈ ₹1,60,357
≈ ₹15,590
₹50,000 monthly
5%
20
≈ ₹1,32,665
≈ ₹18,845
₹1,00,000 lump sum
6%
15
≈ ₹2,39,656
≈ ₹41,727
₹1,00,00,000 corpus
5%
25
≈ ₹3,38,635 in today’s terms
—
₹5,00,000 education cost
8%
15
≈ ₹15,86,085
≈ ₹1,57,600
The education example uses a higher inflation rate because education costs in India have historically risen faster than general CPI. The last row shows that a ₹1 crore corpus in 25 years will have the purchasing power of roughly ₹33.86 lakh today if inflation averages 5%[reference:10].
How to read the result
- Future cost — the nominal amount you will need in the future to buy what you can buy today. Use this to set savings targets.
- Value in today’s money — what a future amount is worth in today’s purchasing power. Use this to sanity-check whether your retirement corpus is sufficient.
- Loss in purchasing power — the percentage of value eroded. At 6% inflation over 20 years, purchasing power falls by roughly 69%.
- Real return — the return after inflation. If your investment earns 7% and inflation is 6%, the real return is about 0.94%. That is the actual increase in purchasing power.
- Year-wise table — shows how the erosion accelerates. Inflation compounds, so the loss in later years is larger than in earlier years.
Inflation and investments: the real return problem
Most investors focus on nominal returns — the headline rate quoted by the bank or fund. But what matters for your lifestyle is the real return, which is the nominal return minus inflation. If the nominal return is lower than inflation, you are losing purchasing power even though the account balance is growing.
Investment
Nominal return
Inflation
Real return
Verdict
Savings account 3.0% 6% −2.83% Losing purchasing power Fixed deposit 7.0% 6% 0.94% Barely beating inflation PPF 7.1% 6% 1.04% Modest real growth, tax-free Debt mutual fund 8.0% 6% 1.89% Moderate real growth Equity mutual fund 12.0% 6% 5.66% Strong real growth, with volatility Real estate 8.0% 6% 1.89% Depends on location and rental yield
Real return is calculated as [(1 + nominal) ÷ (1 + inflation)] − 1, not by simple subtraction. The difference is small at low rates but grows at higher rates. The CAGR Calculator and SIP Calculator can help you estimate nominal returns; this inflation calculator converts them into real terms.
Equities have historically delivered the highest real returns in India over long periods, but with significant volatility. Fixed income provides stability but may barely beat inflation. A mix of both, depending on your risk profile and time horizon, is the standard approach[reference:11].
Inflation and retirement planning
Inflation is the biggest silent risk in retirement planning. A corpus that looks sufficient today may be inadequate 20 or 30 years from now. The inflation calculator is the first tool to use before running a retirement projection.
- Estimate current annual expenses. Include household, health, travel and discretionary spending.
- Apply inflation to find future expenses. At 6% for 25 years, expenses multiply by about 4.29 times.
- Multiply by expected retirement years. If you expect to live 25 years after retirement, the corpus must cover 25 years of inflated expenses.
- Adjust for changing spending patterns. Some expenses fall after retirement (commuting, children’s education), others rise (healthcare).
- Use a higher rate for healthcare. Medical inflation in India often runs at 8% to 10%.
Use the Retirement Planning Calculator after adjusting your current expenses for inflation. The two tools work together: inflation gives you the future expense figure, and the retirement calculator tells you how much corpus you need to generate that income.
Common mistakes to avoid
- Using a single inflation rate for all goals. Education and healthcare inflate faster than general CPI. Use higher rates for those goals.
- Confusing nominal and real returns. A 7% FD in a 6% inflation environment gives a real return of less than 1%, not 1%.
- Ignoring inflation in retirement planning. A corpus that seems large today may be insufficient after 25 years of compounding expenses.
- Assuming inflation is constant. Inflation fluctuates. Test 4%, 5%, 6% and 7% scenarios rather than relying on one number.
- Using WPI for personal planning. CPI reflects what households actually pay. WPI is a producer-level measure.
- Forgetting that taxes reduce real returns further. Interest income is taxed at your slab rate. After tax and inflation, many fixed-income investments deliver negative real returns.
- Not revisiting the assumption. Inflation regimes change. Review your assumptions every few years.
- Using the old CPI series without checking. The CPI base year has changed to 2024. Historical comparisons should account for the rebasing.
Frequently asked questions
What is inflation?
Inflation is the rate at which the general level of prices for goods and services rises, reducing the purchasing power of money. When inflation is 6%, something that cost ₹100 last year costs ₹106 this year. Your money buys less than before.
How is inflation calculated in India?
Inflation is primarily measured using the Consumer Price Index (CPI), which tracks the retail prices of a basket of goods and services. The year-on-year inflation rate is the percentage change in the CPI compared with the same month a year ago. The CPI base year was revised from 2012 to 2024 in early 2026, with an expanded basket of 358 items[reference:12].
What is the difference between CPI and WPI?
CPI measures retail inflation — what consumers pay. WPI measures wholesale inflation — prices at the bulk or producer level. CPI includes services; WPI covers only goods. For personal financial planning, CPI is the more relevant measure.
What inflation rate should I assume for long-term planning?
For India, 5% to 6% is a reasonable long-term assumption for general expenses. For education, use 8% to 10%. For healthcare, use 8% to 10%. Test multiple scenarios to see how sensitive your plan is to the assumption.
What is real return?
Real return is the return on an investment after adjusting for inflation. It is calculated as [(1 + nominal return) ÷ (1 + inflation)] − 1. If an FD earns 7% and inflation is 6%, the real return is about 0.94%. Simple subtraction gives an approximate answer but is less accurate at higher rates.
Why does inflation matter for retirement?
Because retirement expenses will be much higher in nominal terms than today. At 6% inflation, monthly expenses of ₹50,000 today become about ₹1,60,357 in 20 years. If your retirement corpus does not account for this, it will run out sooner than expected.
Can inflation be negative?
Yes. Negative inflation, or deflation, means prices are falling. This is rare and usually short-lived in modern economies. India has experienced negative WPI inflation in some months, but CPI deflation is very rare.
How does the new CPI base year affect my calculations?
The base year change from 2012 to 2024 updates the basket and weights used to measure inflation. The inflation rate itself remains comparable, but the index level has been rebased. For long-term historical comparisons, use the inflation rate series rather than the index level. The new series reflects current spending patterns more accurately[reference:13].
Does the inflation calculator account for taxes?
No. The calculator shows pre-tax figures. To find your post-tax real return, first deduct tax from the nominal return, then subtract inflation. For example, if an FD earns 7% and you are in the 30% slab, the post-tax return is about 4.90%. If inflation is 6%, the real post-tax return is negative.
How often should I review my inflation assumption?
Review it every two to three years, or whenever there is a significant change in the inflation regime. Central bank targets, global commodity prices and domestic food supply can all shift the inflation trajectory. Do not set an assumption and forget it for a decade.
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Compound Interest Calculator
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Gratuity Calculator
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Related guides
Personal Finance Calculator Guide
Wealth Creation Strategy in India
KCC Loan 2026: Limit, Rate and Rules
Checklist for inflation planning
- Current annual expenses estimated accurately
- Inflation rate tested at 4%, 5%, 6% and 7%
- Higher rates used for education and healthcare goals
- Real return calculated for all major investments
- Post-tax real return checked for fixed-income products
- Retirement corpus adjusted for inflation over the full horizon
- Assumptions reviewed every two to three years
- New CPI series figures used for current comparisons
- Inflation accounted for in goal-based investing plans
- Emergency fund sized to cover inflated future expenses
Disclaimer: This inflation calculator and the content on this page are for education and mathematical estimation only. They are not investment advice, financial planning advice, or a substitute for professional consultation. Inflation rates fluctuate and future inflation is uncertain. The assumptions you enter determine the results. Historical inflation data is not a guarantee of future inflation. Tax treatment of investment returns depends on your income slab and the current provisions of the Income-tax Act. Always consult a qualified financial adviser before making investment or retirement decisions. Harshonomics is not a lender, a mutual fund distributor, or a SEBI-registered Investment Adviser.
Inflation calculator guide
What is an Inflation Calculator?
An Inflation Calculator shows how the purchasing power of money changes over time. You enter an amount, an assumed inflation rate and a number of years. The calculator then shows two things: what that amount will need to be in the future to buy the same goods and services, and what today’s amount will be worth in the future after inflation erodes its value.
Inflation is the rate at which prices rise. When prices rise, each rupee buys less than before. A salary that feels comfortable today may not cover the same lifestyle ten or twenty years from now. The inflation calculator makes that erosion visible, so you can plan your savings, investments and retirement corpus accordingly.
India’s Consumer Price Index (CPI) inflation was 3.21% in February 2026 and 3.40% in March 2026, based on the new CPI series with base year 2024=100[reference:0][reference:1]. Wholesale Price Index (WPI) inflation was 9.87% in June 2026[reference:2]. Over the long term, Indian inflation has averaged around 5% to 7%, depending on the period and the index used[reference:3]. The calculator lets you test different rates so you are not dependent on a single assumption.
What this calculator shows you
- Future cost — how much a present expense will cost after inflation.
- Future value of money — what today’s amount will be worth in the future in today’s purchasing power.
- Loss in purchasing power — the percentage of value eroded by inflation.
- Real return — the return on an investment after subtracting inflation.
- Year-wise table — how the value changes each year.
- Reverse calculation — what a future amount is worth in today’s money.
- Multiple scenarios — compare 4%, 5%, 6% and 7% inflation side by side.
Tip: Inflation compounds just like interest. A 6% inflation rate halves the purchasing power of money in about 12 years. If your investments earn less than inflation, your real wealth is shrinking even if the nominal balance is growing. Always calculate the real return, not just the nominal one.
How to use the inflation calculator
- Enter the current amount — a monthly expense, a lump sum, or a future goal.
- Enter the assumed annual inflation rate. In India, 5% to 6% is a common long-term assumption, but you can test 4%, 5%, 6% and 7%.
- Enter the number of years.
- Choose whether you want the future cost of a present expense, or the present value of a future amount.
- Read the result. The calculator shows both the nominal future amount and the purchasing-power-adjusted value.
- Change the inflation rate and tenure to see how sensitive the result is.
- Use the output to set savings targets, estimate retirement needs and evaluate whether your investments are beating inflation.
Inflation formulas
Future cost (what a present expense will become):
Future Cost = Present Cost × (1 + Inflation Rate)n
Future value of money (what today’s amount will be worth):
Future Value = Present Value ÷ (1 + Inflation Rate)n
Real return on an investment:
Real Return = [(1 + Nominal Return) ÷ (1 + Inflation Rate)] − 1
- n — number of years
- Inflation Rate — annual rate in decimal (6% = 0.06)
Example: If monthly expenses are ₹50,000 today and inflation averages 6%, then in 10 years the same expenses will cost ₹50,000 × (1.06)10 ≈ ₹89,542. In 20 years, they will cost ₹50,000 × (1.06)20 ≈ ₹1,60,357. The calculator does this compounding for you.
For real return, if a fixed deposit earns 7% and inflation is 6%, the real return is [(1.07 ÷ 1.06) − 1] × 100 ≈ 0.94%. The nominal gain looks healthy, but after inflation the purchasing power has barely moved[reference:4].
CPI vs WPI: which inflation matters?
India publishes two main inflation measures: the Consumer Price Index (CPI) and the Wholesale Price Index (WPI). They track different baskets and serve different purposes.
| Point | CPI (Consumer Price Index) | WPI (Wholesale Price Index) |
|---|---|---|
| What it tracks | Retail prices paid by consumers | Wholesale prices of goods traded in bulk |
| Base year | 2024 = 100 (revised from 2012) | 2022-23 = 100 |
| Coverage | Goods and services, including food, housing, health, education | Primary articles, fuel and power, manufactured products |
| Published by | National Statistics Office (MoSPI) | Office of the Economic Adviser, Ministry of Commerce & Industry |
| Use for personal planning | Better — reflects what households actually pay | Better for business and producer cost analysis |
For personal financial planning, CPI is the more relevant measure. It reflects the cost of the basket of goods and services that an average household consumes. WPI is useful for understanding cost pressures at the producer level but does not directly reflect retail prices.
The CPI base year was revised from 2012 to 2024 in early 2026, with an expanded basket of 358 items and updated weights[reference:5][reference:6]. The weight of food and beverages declined from 42.61% to 36.75%, reflecting changing consumption patterns[reference:7]. This revision makes the CPI a more accurate reflection of current household spending.
India inflation: recent and historical trends
| Period | CPI inflation (average) | Context |
|---|---|---|
| FY 2022-23 | 6.7% | Post-pandemic supply disruptions, global commodity spike |
| FY 2023-24 | 5.4% | Moderating food and fuel prices |
| FY 2024-25 | 4.6% | Stable food prices, RBI rate actions |
| FY 2025-26 (Apr–Dec) | ~1.8% under new series | Sharp fall in food inflation, base effects |
| Feb 2026 | 3.21% | Increase of 47 basis points over January |
| Mar 2026 | 3.40% | Food and beverages drove the rise |
| Long-term average (1960–2025) | 7.23% | Includes periods of very high inflation in the 1970s and 1990s |
Sources: MoSPI CPI press releases, RBI Bulletin, historical inflation data[reference:8][reference:9]. The 2025-26 figures use the new CPI 2024 base series. Older figures use the 2012 base series.
For long-term planning, a 5% to 6% inflation assumption is reasonable for India. However, education and healthcare inflation often runs higher — sometimes 8% to 10% — because these services have a higher wage component and less productivity gain. Use a higher rate for those specific goals.
Illustrative examples
Sample calculations. Your actual results depend on the inflation rate and tenure you choose.
| Current amount | Inflation rate | Years | Future cost | Value in today’s money |
|---|---|---|---|---|
| ₹50,000 monthly | 6% | 10 | ≈ ₹89,542 | ≈ ₹27,920 |
| ₹50,000 monthly | 6% | 20 | ≈ ₹1,60,357 | ≈ ₹15,590 |
| ₹50,000 monthly | 5% | 20 | ≈ ₹1,32,665 | ≈ ₹18,845 |
| ₹1,00,000 lump sum | 6% | 15 | ≈ ₹2,39,656 | ≈ ₹41,727 |
| ₹1,00,00,000 corpus | 5% | 25 | ≈ ₹3,38,635 in today’s terms | — |
| ₹5,00,000 education cost | 8% | 15 | ≈ ₹15,86,085 | ≈ ₹1,57,600 |
The education example uses a higher inflation rate because education costs in India have historically risen faster than general CPI. The last row shows that a ₹1 crore corpus in 25 years will have the purchasing power of roughly ₹33.86 lakh today if inflation averages 5%[reference:10].
How to read the result
- Future cost — the nominal amount you will need in the future to buy what you can buy today. Use this to set savings targets.
- Value in today’s money — what a future amount is worth in today’s purchasing power. Use this to sanity-check whether your retirement corpus is sufficient.
- Loss in purchasing power — the percentage of value eroded. At 6% inflation over 20 years, purchasing power falls by roughly 69%.
- Real return — the return after inflation. If your investment earns 7% and inflation is 6%, the real return is about 0.94%. That is the actual increase in purchasing power.
- Year-wise table — shows how the erosion accelerates. Inflation compounds, so the loss in later years is larger than in earlier years.
Inflation and investments: the real return problem
Most investors focus on nominal returns — the headline rate quoted by the bank or fund. But what matters for your lifestyle is the real return, which is the nominal return minus inflation. If the nominal return is lower than inflation, you are losing purchasing power even though the account balance is growing.
| Investment | Nominal return | Inflation | Real return | Verdict |
|---|---|---|---|---|
| Savings account | 3.0% | 6% | −2.83% | Losing purchasing power |
| Fixed deposit | 7.0% | 6% | 0.94% | Barely beating inflation |
| PPF | 7.1% | 6% | 1.04% | Modest real growth, tax-free |
| Debt mutual fund | 8.0% | 6% | 1.89% | Moderate real growth |
| Equity mutual fund | 12.0% | 6% | 5.66% | Strong real growth, with volatility |
| Real estate | 8.0% | 6% | 1.89% | Depends on location and rental yield |
Real return is calculated as [(1 + nominal) ÷ (1 + inflation)] − 1, not by simple subtraction. The difference is small at low rates but grows at higher rates. The CAGR Calculator and SIP Calculator can help you estimate nominal returns; this inflation calculator converts them into real terms.
Equities have historically delivered the highest real returns in India over long periods, but with significant volatility. Fixed income provides stability but may barely beat inflation. A mix of both, depending on your risk profile and time horizon, is the standard approach[reference:11].
Inflation and retirement planning
Inflation is the biggest silent risk in retirement planning. A corpus that looks sufficient today may be inadequate 20 or 30 years from now. The inflation calculator is the first tool to use before running a retirement projection.
- Estimate current annual expenses. Include household, health, travel and discretionary spending.
- Apply inflation to find future expenses. At 6% for 25 years, expenses multiply by about 4.29 times.
- Multiply by expected retirement years. If you expect to live 25 years after retirement, the corpus must cover 25 years of inflated expenses.
- Adjust for changing spending patterns. Some expenses fall after retirement (commuting, children’s education), others rise (healthcare).
- Use a higher rate for healthcare. Medical inflation in India often runs at 8% to 10%.
Use the Retirement Planning Calculator after adjusting your current expenses for inflation. The two tools work together: inflation gives you the future expense figure, and the retirement calculator tells you how much corpus you need to generate that income.
Common mistakes to avoid
- Using a single inflation rate for all goals. Education and healthcare inflate faster than general CPI. Use higher rates for those goals.
- Confusing nominal and real returns. A 7% FD in a 6% inflation environment gives a real return of less than 1%, not 1%.
- Ignoring inflation in retirement planning. A corpus that seems large today may be insufficient after 25 years of compounding expenses.
- Assuming inflation is constant. Inflation fluctuates. Test 4%, 5%, 6% and 7% scenarios rather than relying on one number.
- Using WPI for personal planning. CPI reflects what households actually pay. WPI is a producer-level measure.
- Forgetting that taxes reduce real returns further. Interest income is taxed at your slab rate. After tax and inflation, many fixed-income investments deliver negative real returns.
- Not revisiting the assumption. Inflation regimes change. Review your assumptions every few years.
- Using the old CPI series without checking. The CPI base year has changed to 2024. Historical comparisons should account for the rebasing.
Frequently asked questions
What is inflation?
Inflation is the rate at which the general level of prices for goods and services rises, reducing the purchasing power of money. When inflation is 6%, something that cost ₹100 last year costs ₹106 this year. Your money buys less than before.
How is inflation calculated in India?
Inflation is primarily measured using the Consumer Price Index (CPI), which tracks the retail prices of a basket of goods and services. The year-on-year inflation rate is the percentage change in the CPI compared with the same month a year ago. The CPI base year was revised from 2012 to 2024 in early 2026, with an expanded basket of 358 items[reference:12].
What is the difference between CPI and WPI?
CPI measures retail inflation — what consumers pay. WPI measures wholesale inflation — prices at the bulk or producer level. CPI includes services; WPI covers only goods. For personal financial planning, CPI is the more relevant measure.
What inflation rate should I assume for long-term planning?
For India, 5% to 6% is a reasonable long-term assumption for general expenses. For education, use 8% to 10%. For healthcare, use 8% to 10%. Test multiple scenarios to see how sensitive your plan is to the assumption.
What is real return?
Real return is the return on an investment after adjusting for inflation. It is calculated as [(1 + nominal return) ÷ (1 + inflation)] − 1. If an FD earns 7% and inflation is 6%, the real return is about 0.94%. Simple subtraction gives an approximate answer but is less accurate at higher rates.
Why does inflation matter for retirement?
Because retirement expenses will be much higher in nominal terms than today. At 6% inflation, monthly expenses of ₹50,000 today become about ₹1,60,357 in 20 years. If your retirement corpus does not account for this, it will run out sooner than expected.
Can inflation be negative?
Yes. Negative inflation, or deflation, means prices are falling. This is rare and usually short-lived in modern economies. India has experienced negative WPI inflation in some months, but CPI deflation is very rare.
How does the new CPI base year affect my calculations?
The base year change from 2012 to 2024 updates the basket and weights used to measure inflation. The inflation rate itself remains comparable, but the index level has been rebased. For long-term historical comparisons, use the inflation rate series rather than the index level. The new series reflects current spending patterns more accurately[reference:13].
Does the inflation calculator account for taxes?
No. The calculator shows pre-tax figures. To find your post-tax real return, first deduct tax from the nominal return, then subtract inflation. For example, if an FD earns 7% and you are in the 30% slab, the post-tax return is about 4.90%. If inflation is 6%, the real post-tax return is negative.
How often should I review my inflation assumption?
Review it every two to three years, or whenever there is a significant change in the inflation regime. Central bank targets, global commodity prices and domestic food supply can all shift the inflation trajectory. Do not set an assumption and forget it for a decade.
Related calculators
Related guides
Checklist for inflation planning
- Current annual expenses estimated accurately
- Inflation rate tested at 4%, 5%, 6% and 7%
- Higher rates used for education and healthcare goals
- Real return calculated for all major investments
- Post-tax real return checked for fixed-income products
- Retirement corpus adjusted for inflation over the full horizon
- Assumptions reviewed every two to three years
- New CPI series figures used for current comparisons
- Inflation accounted for in goal-based investing plans
- Emergency fund sized to cover inflated future expenses
Disclaimer: This inflation calculator and the content on this page are for education and mathematical estimation only. They are not investment advice, financial planning advice, or a substitute for professional consultation. Inflation rates fluctuate and future inflation is uncertain. The assumptions you enter determine the results. Historical inflation data is not a guarantee of future inflation. Tax treatment of investment returns depends on your income slab and the current provisions of the Income-tax Act. Always consult a qualified financial adviser before making investment or retirement decisions. Harshonomics is not a lender, a mutual fund distributor, or a SEBI-registered Investment Adviser.