Home Calculators Goal SIP Calculator
How much a goal costs you a month
Every other calculator here starts with the instalment and ends with a number. This one starts with the number. Enter what the goal costs in today's money, when you need it, and the return you assume — and it inflates the goal to its future cost before working out the SIP.
Your numbers
Change anything; the result updates as you type.
Result
The required SIP falls fast as the assumed return rises.
Which is exactly why the assumption deserves evidence. MindForge publishes the backtest behind each of its three strategies, and the two paid ones trade in their own broker-verified Zerodha accounts.
How a month works — about ten minutes on the 1stAlready investing every month? How a monthly amount goes into a book
Why the goal is inflated first
A goal priced today will not cost that in ten years. An engineering degree at ₹20 lakh now is about ₹36 lakh at 6% inflation a decade out, and a plan built on the ₹20 lakh figure is short by nearly half. The calculator inflates the goal first and then solves for the instalment that reaches the inflated number.
target = goal × (1 + inflation)t · P = target × i ÷ ([ (1 + i)n − 1 ] × (1 + i))
Reading the result
- Monthly SIP required — the instalment that reaches the inflated target at the return you assumed.
- Goal in future money — what the goal will actually cost on the day you need it.
- You would invest — the instalment multiplied by the number of months. The gap between that and the target is the work the return is expected to do.
If the number is uncomfortable
There are only four levers, and the calculator prices each one: invest more per month, give the goal more time, assume a higher return, or want less. Moving the return assumption is the easiest thing to do on a screen and the hardest thing to do in a portfolio — treat a higher number there as a claim that needs evidence, not a fix.
Assumptions this makes
- A constant return compounded monthly, instalments at the start of each month, and a constant inflation rate applied to the goal.
- No existing savings are counted. If you already have part of the goal, work out what that grows to in the lumpsum calculator and reduce the goal by that amount.
- No fees or taxes. Markets do not deliver the same return every year, so treat the output as an illustration of compounding — not a forecast, and not investment advice.