Investment tools

ROI Calculator

See the net gain and return on investment after including additional income and costs.

01

Your inputs

02

Estimated results

Return on investment21%
Net gain or lossLKR 210,000.00
Value after income and costsLKR 1,210,000.00
Change any input to update the estimate.

How this calculator works

ROI

ROI expresses the gain or loss as a percentage of the initial amount invested, helping compare opportunities of different sizes.

01

Formula

Net gain = Final value + Income − Costs − Initial investment. ROI = Net gain ÷ Initial investment × 100.

02

Simple example

An initial Rs. 1,000,000 investment ending at Rs. 1,180,000 with Rs. 50,000 income and Rs. 20,000 costs returns Rs. 210,000, or 21%.

FAQ

Frequently asked questions

Can ROI be negative?+

Yes. ROI is negative when the final value and income do not cover the initial investment and other costs.

Does ROI account for time?+

No. Basic ROI does not annualise the result, so compare investments over similar periods.

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