lumpsum calculator · tools

a one-time amount, compounded.

You have a chunk — a bonus, an inheritance, a sale, a savings account that's been sleeping. What does it grow to if you just leave it alone?

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the three knobs
your one-time amount
₹5,00,000
₹10,000₹1 cr
for how many years
15 yrs
1 yr40 yrs
expected return (CAGR)
12.0%
5%18%
Compounding is the whole point. A lumpsum invested today and left alone gets to use the full duration. The catch: market timing matters more here than with a SIP — you put it all in on one date, at one price. Hence the "returns not guaranteed" line below.
in 15 years, this could grow to
₹27.4 L
₹27,36,795
assuming 12% p.a. · returns not guaranteed
you'd have put in
₹5,00,000
market would have given back
+₹22,36,795
multiplier
5.47×
or just talk to archita directly.

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the boring math behind it

three honest answers.

what's a lumpsum?

A one-time investment, not a recurring one. You drop ₹5 lakh into a fund today, and don't touch it. No monthly drip. The fund compounds whatever returns it makes, on the whole amount, for the whole duration.

Lumpsums are best when you have a sudden chunk — bonus, inheritance, property sale, FD maturity — and a goal that's many years away.

how does the math work?

Standard compound interest, compounded annually:

FV = P × (1 + r)^n

Where P is the lumpsum amount, r is the annual return rate (as a decimal), and n is the number of years. Cleaner formula than SIP — but the timing matters more (one buy at one price), so the path can swing wider.

lumpsum or sip?

Honest answer: depends on what you have. If you have a chunk now and the market's at a normal level, lumpsum captures all the future compounding. If you have an income stream and the market's volatile, SIP averages your buy price.

Most real people use both. A monthly SIP for discipline, a lumpsum when an unexpected amount lands. Talk to Archita — she'll help you figure out the split.

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