What the goal would cost if bought today.
When you need the money.
Your own assumption.
Money already set aside for this goal.
Your own assumption, not a promised or guaranteed return.
Quick examples
To reach a goal costing ₹10,00,000 today in 10 years (about ₹17,90,848 then).
What each result means
Future goal cost
What it is: Goal cost grown at your inflation rate.
Your value: ₹17,90,848
What you'll actually need.
Savings grown
What it is: Your existing savings grown at your return.
Your value: ₹0
Reduces what you still need.
Monthly SIP needed
What it is: Monthly investment to cover the gap.
Your value: ₹7,708
The headline figure.
Total you will invest
What it is: SIP × months.
Your value: ₹9,24,949
Compare with the future goal cost.
Year-by-year breakdown
| Year | Invested this year (₹) | Total invested (₹) | Estimated growth (₹) | Value at year end (₹) |
|---|---|---|---|---|
| 1 | ₹92,495 | ₹92,495 | ₹6,238 | ₹98,733 |
| 2 | ₹92,495 | ₹1,84,990 | ₹24,998 | ₹2,09,988 |
| 3 | ₹92,495 | ₹2,77,485 | ₹57,868 | ₹3,35,353 |
How to read this: each row is one year of your SIP; by the final row the SIP plus your grown savings should reach the future goal cost.
Showing the first 3 of 10 years. Want charts, formulas and the full schedule? Get the detailed PDF.
What this calculator does
This calculator inflates a goal's cost to the year you need it, subtracts what your existing savings could grow to, and works out the monthly SIP to cover the rest.
What your result means
The SIP is what the numbers show under your assumptions, not a promise the goal will be met.
Formula
1. Future goal cost
Symbols
- G
- Goal cost today (₹)
Worked example
₹10,00,000 at 6% for 10 years ≈ ₹17,90,848.
2. Savings grown
Symbols
- S
- Already saved (₹)
3. SIP needed for a target
Symbols
- i
- Monthly return = annual ÷ 12 (decimal)
- n
- Months
Why this formula works
It reverses the future-value-of-SIP formula: the monthly amount that grows to the target.
Unit check
₹ = ₹ ÷ (pure ratio). ✓
Common mistakes
Using the annual rate as the monthly rate. Forgetting to inflate the goal to its future cost.
Working for your numbers
- FG = ₹10,00,000 × 1.060^10 = ₹17,90,848
- FS = ₹0 × 1.120^10 = ₹0
- Gap = ₹17,90,848
- SIP = gap ÷ 232.3391 = ₹7,708
Frequently asked questions
What if my savings already cover the goal?
Then the SIP needed shows ₹0 — under your assumptions, the savings alone could grow to the future cost.
Is the return on this page guaranteed?
No. Every rate here is your own assumption. Market-linked results go up and down; this page shows what the numbers give under your assumptions, not a promise.
When should I talk to a professional instead?
Before a real decision, especially a large or long-term one, speak to a SEBI-registered investment adviser or a qualified professional. This page is educational only.
Symbols and assumptions
- G
- Goal cost today
- inf
- Inflation
- S
- Already saved
- r
- Assumed return
- Inflation and returns are constant.
- SIP instalments are invested at the start of each month.
- Does not account for taxes, fees, expense ratios or exit loads.
Sources and review
Reviewed 2026-09-29 · Next review 2027-09-29
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How it works
Define a target amount and time period. We calculate the monthly investment required to reach that goal based on expected returns.
The formula
Required Investment = (Goal - FV(Savings)) / [( (1+r)^n - 1) / r * (1+r)]- Goal
- Target Amount
- r
- Monthly Rate
- n
- Months to Goal
Worked example
Saving ₹50L for a house in 10 years at 12% return.
Pro tips
- Be realistic with return assumptions.
- Adjust for inflation in your target amount.
Common mistakes
- Underestimating the target amount.
Go deeper
Related lessons
Concepts to explore
Related guides
Institutional grade calculations are illustrative and for educational wealth architecture. Results do not constitute investment advice.

