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ROI, or Return on Investment, is a simple financial measure used to compare the profit or loss from an investment with the amount originally invested. It expresses the result as a percentage, making it easier to evaluate investment performance and compare different opportunities.
A positive ROI means the final return is greater than the original investment, while a negative ROI means the investment produced a loss. An ROI of 0% means the investment broke even.
The standard return on investment formula compares the net profit or loss with the original investment:
Net profit or loss is calculated by subtracting the original investment from the final return:
Suppose you invest $1,000 and the investment later has a final return of $1,500.
Investment: $1,000
Final Return: $1,500
Profit: $1,500 − $1,000 = $500
ROI: ($500 ÷ $1,000) × 100 = 50%
The investment produced a 50% positive ROI, meaning the profit was equal to 50% of the original amount invested.
ROI can help you quickly understand whether an investment produced a gain, broke even, or resulted in a loss.
A positive ROI occurs when the final return is greater than the original investment. For example, investing $1,000 and receiving $1,200 produces a $200 profit and a 20% ROI.
An ROI of 0% occurs when the final return equals the original investment. For example, investing $1,000 and receiving $1,000 means there is no profit or loss.
A negative ROI occurs when the final return is lower than the original investment. For example, investing $1,000 and receiving $750 produces a $250 loss and an ROI of -25%.
ROI is useful because it converts investment performance into a percentage. This makes results easier to compare even when the original investment amounts are different.
For example, a $500 profit may sound substantial, but its meaning depends on how much was invested. A $500 profit on a $1,000 investment represents a 50% ROI, while the same $500 profit on a $10,000 investment represents only a 5% ROI.
A higher ROI generally indicates a greater return relative to the amount invested. However, ROI should not be considered by itself when evaluating financial decisions because investments can differ in duration, risk, costs and other factors.
Return on investment calculations can be useful in many financial and business situations, including:
Suppose a business spends $2,000 on a marketing campaign and uses $3,000 as the final return for the ROI calculation.
Investment: $2,000
Final Return: $3,000
Profit: $1,000
ROI: ($1,000 ÷ $2,000) × 100 = 50%
Using those inputs, the calculated ROI is 50%. When evaluating real marketing performance, businesses may also need to consider additional campaign costs and how the return is defined.
ROI is a useful performance metric, but a simple ROI percentage does not provide a complete picture of every investment.
The basic ROI calculation does not automatically account for factors such as investment duration, inflation, taxes, financing costs, transaction fees, opportunity cost or differences in risk.
Two investments can therefore have the same ROI while having very different time periods or risk levels. ROI can be a useful starting point for comparison, but important financial decisions may require additional analysis.