What Is Your Personal Inflation Rate, and How Far Is It From CPI?

Why CPI may not match your bills

CPI is one number for the whole country, and your bills may move differently.

CPI weights each category by what an average household spends on it. If you spend more on rent, school fees or eating out than that average, your basket moves differently. That doesn't make CPI wrong. It measures the national basket accurately; your own rate measures yours. Knowing both tells you whether a raise, a return or a savings plan is keeping pace with your life.

How to work out your own rate

A personal rate is only as good as the spending figures behind it.

Five steps, with a month of bank and card statements to hand.

1. List a typical month's spending by category. Leave out savings, investments and one-off purchases.
2. Note last year's rise in each, from your own bills where you can: rent renewal, school fee notice, power bill.
3. Where you have no figure, use the CPI rate for that category.
4. Weight each rise by its share of your spending and add them up. The calculator does this step.
5. Compare the result with headline CPI, and recheck once a year.

To see what a goal will cost in future rupees, use the inflation calculator.

₹60,000 a month, worked through

A weighted average is easier to trust when you can see each part.

At September 2026 CPI category rates, ₹60,000 a month comes to about 4.8% a year, below CPI of 5.54%, because rent, the largest share here, rose only 2.37%. Now say your rent rises 8% at renewal and school fees rise 10%. Your estimate becomes about 7.1%.

At CPI, the same ₹60,000 would cost about ₹3,320 more a month a year later. Your bills add about ₹4,250, so your spending grows about ₹900 a month faster than CPI would suggest, in one year. That gap is for one year; if your rent and fees keep rising faster, it repeats and adds up.

Health and education costs

These are the two costs most people expect to rise fastest, and they often move differently from CPI.

In September 2026, CPI health inflation was 1.40% and education services 3.94%. Those are national averages for prices like medicines and fees. Your own costs can move differently: a fee revision lands in one go, and insurance premiums can rise with age. A separate measure, Aon's survey of employer medical costs, projects an 11.5% rise in India in 2026; it tracks what companies pay for group health cover, not the prices you pay. Use your own bills where you have them, and read how much health cover you need.

What to do with the gap

Knowing your rate helps only if it changes a decision.

If your rate is above CPI, check whether your salary rise and your savings plan cover the gap. Investing the monthly difference covers one year's gap; recheck each year, because the gap can grow, shrink or close. If your rate is below CPI, you have room: keep the difference saved rather than spent. Either way, split your salary with your own rate in mind.

Common mistakes

Most personal rates go wrong on the inputs, not the arithmetic.

• Counting savings and investments as spending.
• Using a one-off price jump as the yearly rate.
• Applying rent inflation to a fixed home-loan EMI.
• Comparing your rate with an old CPI figure.
• Treating one year's gap as permanent.
• Using your personal rate to price a goal 20 years away without a range.