Lump Sum Investment Calculator
Estimate the future value of a one-time investment at an assumed annual return and compounding frequency. Pick a preset duration or enter your own, and see the year-by-year growth.
Written and reviewed by the CalcBundle editorial team. Transparent formulas · results are estimates, not advice.
Estimated future value
Enter an initial investment and a period greater than zero.
What is lump-sum investing?
Lump-sum investing puts a single amount to work immediately, giving it the maximum time to compound. This calculator projects what that one-time investment could become at an assumed rate.
How compounding affects a lump sum
- Future value = PV × (1 + r/n)n×t
- More frequent compounding (n) and a longer horizon (t) both raise the estimate.
Assumptions behind projections
The single most important input is the expected return, and it is only an assumption. Model a few rates and durations, compare regular investing with the SIP calculator, check the growth rate with the CAGR calculator, and see the mechanics in the compound interest calculator.
Example
$10,000 at an assumed 8% annual return for 10 years grows to about $21,589 — a gain of roughly $11,589, before any taxes or fees.
Frequently asked questions
What is lump-sum investing?
Lump-sum investing means putting a single amount to work all at once, rather than spreading it out over time. It maximises time in the market, which historically has mattered more than timing the market.
How does compounding affect a lump sum?
The whole amount compounds for the entire period, so the growth curve steepens over time. Longer horizons and more frequent compounding both increase the estimated future value.
Lump sum or regular investing?
A lump sum keeps more money invested for longer, while regular investing spreads out your entry price. Compare this projection with the SIP calculator to see the difference for your numbers.
Are the projections guaranteed?
No. The expected return is an assumption you enter. Real returns fluctuate, so treat the result as an illustrative projection for planning.
Related calculators
Compound Interest
Project growth from an initial amount, rate, compounding and regular contributions.
Investment Return
Work out total return, gain and annualized return on an investment.
CAGR
Compute compound annual growth rate, or solve for value or years.
SIP
Estimate the future value of regular monthly investments, with step-up.
Disclaimer. This calculator provides estimates for informational purposes only. Results are based on the information you enter and the assumptions used by the calculator. Actual financial, tax, business valuation, lending, marketplace or investment outcomes may differ. Consider consulting a qualified professional for decisions involving significant amounts of money. The expected return is an assumption. Projections are illustrative and not guaranteed.