How does the ROI Calculator work?
The calculator adds any additional investment costs to the initial investment, adds any additional cash returns to ending value, then compares total return with total invested cost. ROI is the net gain or loss divided by total invested cost.
For ongoing business profitability rather than investment return, use the Profit Margin Calculator.
What does annualized ROI mean?
If you enter years, the calculator converts the total value multiple into a compound annual growth rate. Annualized return can make different time horizons easier to compare, but it assumes a smooth compound rate and does not model the exact timing of intermediate cash flows.
If the investment is intended to reach a sales threshold, the Break-Even Calculator can provide a separate operating view.
What costs and returns should be included?
Use a consistent scope. Acquisition costs, implementation fees, maintenance costs or other investment-related cash outflows may belong in total cost. Sale proceeds, distributions or other returns may belong in total return. Omitting material items can overstate ROI.
For business cash movement by period, the Cash Flow Calculator is a better companion.
What are the limitations of ROI?
ROI does not automatically measure risk, taxes, financing structure or the timing of every cash flow. It should be one part of a broader decision. If you are evaluating operating profitability after expenses, compare with the Net Profit Calculator.
Frequently asked questions about ROI
ROI means return on investment and compares net gain or loss with the amount invested.
ROI equals total return minus total invested cost, divided by total invested cost, multiplied by 100.
Yes. A negative ROI means the modeled return is less than the invested cost.
This calculator reports a compound annualized rate when years are entered and the total return value is positive.
Include financing costs if they are part of the investment-cost scope you want to evaluate.
No. ROI is a return metric and does not measure uncertainty, volatility or the probability of achieving the modeled result.
The optional annualized rate can help normalize time, but project cash-flow timing and risk may still differ.
No. ROI compares return with invested cost, while profit margin compares profit with revenue.
Sources and methodology
The calculator uses the formulas described on this page and the values you enter. The sources below provide authoritative U.S. context for business planning, tax, recordkeeping or financial-statement concepts.