Why goals must be inflated
Most goal plans fail for one reason: the target was set in today’s prices. This calculator inflates the goal to the year you will actually spend it, then works out the investment needed to reach that larger, honest number.
Formula
Future goal = today’s cost × (1 + inflation)^years
- Real return = ((1 + expected return) ÷ (1 + inflation)) − 1
- Existing savings are grown at the expected nominal return
- The SIP is computed against the inflated target, not the current one
The gap between the two targets
A goal costing ₹20 lakh today needs about ₹35.8 lakh in ten years at 6% inflation. Planning for ₹20 lakh would leave you nearly ₹16 lakh short of the thing you actually wanted to buy.
The required SIP tells the same story: about ₹12,700 a month against the inflated target, versus roughly ₹5,900 against the nominal one. Ignoring inflation understates the requirement by more than half.
Real return is what you actually earn
A 12% return with 6% inflation is not a 6% real return — it is ((1.12 ÷ 1.06) − 1), about 5.66%. The subtraction shortcut is close enough for rough work but drifts as both numbers rise.
Judging every investment on its real return changes decisions. A 7% deposit against 6% inflation earns under 1% in purchasing power before tax, and negative after it.
Use the right inflation rate for the goal
General inflation of 5-6% suits broad lifestyle goals. Education has historically run at 8-10%, healthcare higher still, while property and vehicle prices follow their own cycles.
Using a single blended number across every goal is convenient and usually wrong. The category-specific rate is what makes the target realistic.
Reviewing the plan
Recheck the target every couple of years against actual price movements. If inflation runs above your assumption, increasing the SIP early is far easier than making up the difference at the end.
A step-up SIP handles this naturally by raising contributions each year in line with income, which usually grows with inflation too.
Example: ₹20 lakh goal, 10 years away
- Cost today
- ₹20,00,000
- Inflation
- 6% p.a.
- Cost in 10 years
- ≈ ₹35.8 lakh
- Impact of inflation
- ≈ ₹15.8 lakh
- Real return at 12% nominal
- ≈ 5.66%
- Monthly SIP needed
- ≈ ₹12,700
Planning against the un-inflated ₹20 lakh would have needed only ₹5,900 a month — and left you unable to afford the goal when the time came.