Inflation Impact Calculator
India's headline CPI is 6%, but your personal inflation is probably higher. Healthcare runs at 10–12%, education at 10–11%. Enter your spending mix and see what your monthly expenses will look like in 10, 20, or 30 years, and how that changes your FIRE number.
Your total household expenses today
Your assumed annual inflation rate
Projects to 2046
Monthly spend in 2046
₹3.2 L
At your 6% inflation rate
Blended inflation
7.0%
+1.0 pp vs your 6%
At blended inflation (7.0%)
₹3.9 L
From your spending breakdown
Monthly Spend Projection
Your inflation rate vs blended - hover for values
How this is calculated
Blended inflation rate
r_eff = Σ (weight_i × inflation_i) / 100
Each category's inflation rate is weighted by its share of your total spend. Weights must sum to 100%.
Future monthly spend
Future = Present × (1 + r_eff)^years
Standard compound growth formula applied to monthly expenses using your blended effective inflation rate.
Category rates and the 6% headline figure
This calculator uses the same category-wise defaults used across the site. See the assumptions behind these defaults for the full breakdown and why the headline 6% CPI figure understates most people's real spend.
Divya's spending mix, worked through
Divya, 34, lives in Pune with her parents and a school-going daughter. Her monthly household spend is ₹85,000. She splits it roughly as ₹34,000 on daily needs and groceries, ₹17,000 on rent-equivalent costs since they own the flat but pay maintenance and property tax, ₹12,000 on healthcare because her father needs regular cardiology visits, and ₹22,000 on her daughter's school and coaching fees.
As a share of total spend that's 40% daily needs, 20% housing, 14% healthcare, 26% education. Multiply each share by its category inflation rate. Daily needs at 6% contributes 2.4 points. Housing at 7% contributes 1.4. Healthcare at 10% contributes 1.4. Education at 11% contributes 2.86. Add them up and Divya's blended inflation rate comes to about 8.06%, not the 6% she'd get if she just used the headline CPI number.
Run ₹85,000 forward twenty years at 8.06% instead of 6% and the gap is not small. At 6% her monthly spend in 2046 would be roughly ₹2,72,600. At 8.06% it's closer to ₹4,04,800. Same household, same lifestyle, just a more honest inflation number, and the difference between the two figures is bigger than most people's entire monthly salary today.
What the output means, and what it doesn't
The future monthly spend figure is a projection of what your current lifestyle would cost, in rupees of that future year, if each category kept inflating at the rate you entered. It is not a prediction of what you will actually spend. Lifestyles change. Divya's daughter finishes school and the education line drops to zero, then her own healthcare costs rise as she gets older herself. The number is a snapshot projected forward, useful for corpus planning, not a forecast of a fixed life.
It also doesn't account for one-off costs. A wedding, a home renovation, a hospitalisation that blows past insurance cover. Those show up as lumps, not as a steady rate, and this calculator has no place to put them.
Where people go wrong
The single biggest mistake is anchoring the whole plan to the CPI headline number because it's the one you hear on the news. CPI is a basket average across the whole country, weighted toward food and fuel, categories that inflate slowly. Education and healthcare, the two categories that actually hurt urban households with school-age kids or ageing parents, run at nearly double the headline rate and carry outsized weight in a typical middle-class Indian budget once you're past 35.
The second mistake is applying today's spending mix to a future where the mix will obviously shift. Someone in their late twenties with no kids yet will see their education share balloon over the next decade even if the rate per category stays flat, simply because a line item that was zero becomes a large one. This calculator can only work with the mix you give it today. Revisit it every couple of years as your actual spending changes, rather than treating one run as permanent.
A third, quieter mistake: assuming healthcare inflation caps out. It doesn't reliably. A cardiac stent procedure that cost ₹1,50,000 at a private hospital a decade ago can run past ₹3,00,000 today at the same chain, and newer treatments get priced in at whatever the market bears. Treating 10% as a ceiling rather than a rough floor is optimistic.
A note worth reading before you act
The FIRE math works - but equity returns are not a guarantee. Every projection on this site uses long-term historical averages as a baseline. Markets can and do deliver a decade of poor returns, and if that decade happens to be the early years of your retirement, it puts real pressure on even a well-sized corpus. This isn't a reason to not pursue FIRE. It is a reason to build in margin.
The single most effective safety net is an active income source - even a small one. Freelance work, consulting, a part-time role, rental income. If your portfolio has a bad year and returns 6% instead of 12%, ₹15,000–₹25,000 a month of outside income means you don't have to redeem units at a loss while the market is down. You simply wait.
Financial independence is worth building towards. But “retired” doesn't have to mean “never earns again.” Keep a skill that someone will pay you for. Treat your corpus target as a floor, not a finish line. The goal is resilience - not just a number.
Not financial advice. planMyFIRE is not a SEBI-registered Investment Adviser. Calculator results are estimates based on historical assumptions and are for educational purposes only. Past market returns do not guarantee future performance. Consult a SEBI-registered adviser before making investment decisions. Terms of use.