Lump Sum Investment Calculator Online — Free Tool
Project the long-term growth of a one-time capital investment utilizing annual compound interest rates.
Lump Sum Investment Calculator
Estimates one-time investment growth using annual compounding.
About this tool
A lump-sum investment deploys capital once and lets it compound over time. Enter principal, annual return, and years to project future value without recurring contributions.
Use this when comparing a single upfront investment—inheritance, bonus, or sale proceeds—against spreading the same capital via monthly SIP over an equivalent period.
Common use cases
- Projecting growth of a one-time deposit
- Evaluating whether to invest now versus later
- Modeling fixed-income or equity lump-sum assumptions
- Benchmarking a windfall against SIP alternatives
How to use
- Enter the one-time investment amount.
- Set the expected annual return rate and holding period in years.
- Review future value and total interest or gains earned.
- Change the rate or tenure to stress-test optimistic and conservative cases.
This page is available at /tools/lump-sum-investment-calculator/.
Understanding the result
- Future value grows exponentially with time at a positive rate—the longer the hold, the steeper the curve.
- Interest earned equals future value minus principal; it is entirely from compounding on the initial sum.
- A one-point change in assumed annual return materially shifts long-horizon outcomes.
- No periodic contributions are modeled; add SIP separately if you plan ongoing deposits.
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FAQ
What is the lump-sum investment formula?
Future Value = Principal × (1 + r)^t, where r is annual rate as a decimal and t is years.
Lump sum vs SIP—which grows more?
Lump sum invests everything immediately, so more capital compounds from day one. SIP spreads entries, reducing early exposure.
Does this include taxes or fees?
No. Results are pre-tax and exclude fund expense ratios unless you reduce the rate to approximate them.
Can I model monthly compounding?
The calculator uses standard annual compounding. For monthly, effective annual rate differs slightly from nominal.