Lumpsum Investment Return Calculator

Work out lumpsum investment return instantly with clear inputs, formula shown and shareable results.

About Lumpsum Investment Return Calculator

A lump sum compounds for the entire period, so the outcome is driven by the rate and, more powerfully, by time. Each extra doubling period matters more than the last because it works on a larger base.

Formula

Compound growth

FV = P(1 + r)^t; doubling time = ln2 / ln(1+r)

Worked example

With the default values below, Lumpsum Investment Return Calculator returns Maturity Value of $1,749,225.30. Change any input above and every figure here is recalculated in your browser.

Inputs used

Lump Sum Investedminimum 0: 500,000
Expected Annual Returnaccepts 0–100 %: 11 %
Investment Period In Yearsaccepts 1–50: 12

Results

Maturity Value: $1,749,225.30
Total Gain: $1,249,225.30
Growth Multiple: 3.498
Years To Double: 6.64 years

Step by step

1Values used
2Compound growth
3Maturity Value= 1,749,225.30
4Total Gain= 1,249,225.30
5Growth Multiple= 3.498
6Years To Double= 6.64 years

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or fees or charges into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.
This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.

Frequently Asked Questions

Lump sum or SIP?

Historically a lump sum wins on average because money is invested sooner, but a SIP reduces the risk of a badly timed entry.

What does the doubling period show?

How long the money takes to double at the given rate — a quick sanity check on any return assumption.