The final sum you want to have in hand.
Leave at 0 for plain saving with no growth. Any figure you enter is your own assumption, not a projection by this tool.
Above 0, the target is grown by this rate so it keeps the same buying power.
Increase your monthly contribution by this much every 12 months.
Existing savings, grown at the same return rate and subtracted from what you still need.
Savings Goal Calculator — Work Backwards From the Number You Actually Need
Most savings calculators run forwards: you put in a monthly amount and they tell you what it grows to. That is the wrong direction for planning. You usually start with a fixed target and a fixed deadline — a deposit, a course fee, a replacement vehicle, an emergency fund — and the only unknown is what you have to set aside each month to get there. This tool solves for that, and it also runs in reverse when the monthly amount is the fixed part and the deadline is what you want to discover.
The formula behind the monthly figure
With a level monthly contribution, the calculator inverts the standard future value of an ordinary annuity. Writing P for the monthly contribution, r for the monthly rate (your annual rate divided by twelve), n for the number of months and F for the amount still needed:
rearranged to solve for the contribution:
P = F × r ÷ ( (1 + r)n − 1 )
When the return rate is zero the expression collapses to simple division: P = F ÷ n.
Contributions are treated as arriving at the end of each month, which is the conservative convention and matches how a monthly mandate actually debits.
When you switch on an annual step-up, no closed formula applies, so the tool runs the schedule month by month instead: it grows the balance, adds the contribution, and raises the contribution every twelfth month. Because the final balance is directly proportional to the starting contribution, it computes the balance for a contribution of exactly one unit and then scales. That is exact arithmetic, not an approximation.
Why inflation changes the answer more than people expect
A target of ten lakh in eight years is not a target of ten lakh. If prices rise six percent a year, the same basket of goods costs roughly 1.59 times as much by then, so ten lakh of buying power means you actually need close to sixteen lakh in the account. Enter an inflation figure and the tool grows your target accordingly before solving, so the monthly number you get preserves purchasing power rather than the headline figure. Leave it at zero and the target is treated as a literal cash amount, which is correct for a short-dated goal but understates a long one.
What an annual step-up does
A step-up raises your contribution by a fixed percentage every twelve months, on the reasoning that your income is likely to rise too. The effect on the opening figure is substantial. Reaching the same target with a ten percent annual step-up typically requires a materially smaller contribution in year one than a flat plan does, because the later, larger contributions carry more of the load. The trade-off is that the plan only works if you actually honour the increases, and the year-by-year table shows exactly what each future year demands so you can judge whether that is realistic before you commit.
Using an existing lump sum
If you already hold money earmarked for the same goal, enter it as the lump sum. The tool grows it at the same rate over the same term and subtracts the result from your target, so the monthly figure covers only the shortfall. This is usually the single largest reduction available to anyone who has been saving informally without a plan attached to it.
Choosing a rate to enter
The calculator deliberately ships with a default of zero and never suggests a rate. For a bank recurring deposit or fixed deposit, the correct figure is the rate your bank states contractually for that tenure. For anything market-linked, no rate is contractual or guaranteed, past performance does not predict future performance, and returns can be negative in any given period. The practical approach is to run the calculation two or three times across a range and look at the spread, rather than treating any single output as a forecast.
Frequently asked questions
How is the monthly savings amount calculated?
The calculator inverts the future value of an ordinary annuity, treating each contribution as arriving at the end of the month. Where an annual step-up is applied it runs the full schedule month by month instead of using a formula, then scales the result. Both routes are exact arithmetic on the numbers you supply.
What return rate should I enter?
The tool never picks one for you and defaults to zero. For a fixed or recurring deposit, use the rate your bank states for that tenure, since that figure is contractual. For anything market-linked there is no guaranteed rate at all, so the sensible approach is to run the calculation across a range of assumptions and look at the spread rather than trusting one number.
Does the calculator account for inflation?
Only if you enter an inflation rate. When you do, the target is grown by that rate across the term before the monthly figure is solved, so the result preserves buying power rather than the headline amount. At zero, the target is treated as a literal cash sum.
Why does a step-up lower the monthly figure so much?
Because the later contributions are larger, and each one still earns whatever return you assumed for the months that remain. Shifting weight towards the back of the schedule lets the opening contribution fall while the final balance stays the same. The year-by-year table shows exactly what every future year will demand, which is the number worth checking before committing.
Is this investment advice, and is my data stored anywhere?
It is not advice of any kind. The tool performs arithmetic on figures you type in, does not know your circumstances, and does not recommend any product, platform or rate. Nothing you enter leaves your browser and nothing is stored on our servers. For guidance about your own situation, speak to a SEBI-registered investment adviser.
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