How to calculate the return on investment (ROI)? Formula and examples of ROI calculation.

The return on investment (Return on Investment, or ROI) is a key financial indicator for assessing the profitability of an investment. We will explain in detail how to calculate ROI, with concrete examples and tips for optimizing your investments.

What is the return on investment (ROI)?

The ROI is a financial ratio that measures the effectiveness of an investment. It allows for the comparison of the performance of different placements and assesses a company's ability to generate profits. ROI is generally expressed as a percentage.

This indicator is widely used, both for personal financial decisions and for analyzing the profitability of businesses or comparing the effectiveness of various investments.

How to calculate ROI?

ROI is calculated by dividing the net profit (revenues minus costs) by the amount initially invested, all multiplied by 100 to obtain a percentage.

The formula for ROI is as follows:

ROI = (Net profit / Initial investment) x 100

For example, if you invest €100,000 in a stock and sell it for €130,000, your ROI will be (130 000 € - 100 000 €) / 100 000 € = 30%. Note that in reality, the calculation of income and costs can be more complex.

Application of ROI: concrete examples

Calculation of ROI for a stock investment

Let's take the following example: you buy 1000 shares at €10 each. One year later, you sell them for €12.50 and have received €500 in dividends. The transaction fees amount to €125. What is your ROI?

Total revenue = (12.50 € x 1000) + 500 € = 13,000 € Total costs = (10 € x 1000) + 125 € = 10 125 € Net profit = 13,000 € - 10,125 € = 2,875 €

ROI = (2 875 € / 10 000 €) x 100 = 28,75%

Calculation of advertising ROI

In the field of e-commerce and advertising, ROI is often used to evaluate the effectiveness of marketing campaigns.

Formula: ROI = (Revenue - Cost of Goods Sold) / Cost of Goods Sold

Example: If the production cost of a product is 100 €, its selling price is 300 €, and you sell 10 units thanks to an advertising campaign costing 500 €, your ROI will be:

ROI = [(300 € x 10) - (100 € x 10 + 500 €)] / (100 € x 10 + 500 €) = 100%

Difference between ROI and ROAS

The ROAS (Return on Ad Spend) is often confused with ROI in the advertising industry. ROAS specifically measures the return on advertising spend, without taking into account other costs.

ROAS formula: ROAS = Revenue generated by advertising / Cost of advertising

Let's take the previous example: ROAS = (300 € x 10) / 500 € = 600%

Annualized ROI

The annualized ROI allows for comparing investments over different periods by taking into account the effect of compound interest.

Formula: Annualized ROI (%) = [(1 + Total ROI)^(1/number of years) - 1] x 100

Example: Let's compare two investments: A : 100% total ROI over 2 years B : 200% total ROI over 4 years

Annualized ROI of A: [(1 + 1)^(1/2) - 1] x 100 = 41.4% Annualized ROI of B: [(1 + 2)^(1/4) - 1] x 100 = 31.6%

Investment A is therefore more profitable on an annual basis.

Comparison between ROI, ROA and ROE

The ROI can also be used to assess the performance of companies. Here is a comparative table with the ROA (Return on Assets) and the ROE (Return on Equity):

Optimize your ROI

To improve your ROI, you can:

1. Increase revenues
2. Reduce costs
3. Choose high-growth potential investments

It is important to note that investments with high ROI are often riskier. Therefore, other factors such as volatility and valuation ratios must also be taken into account.

High ROI Investments

Here are some potentially profitable investment options:

1. CFD Trading
2. Foreign exchange market (Forex)
3. Or
4. Actions

Warning: these investments carry high risks and require a good understanding of financial markets.

Limits of ROI

Despite its usefulness, the ROI has certain limitations:

1. It does not take into account the duration of the investment
2. It does not reflect the level of risk
3. It may be overestimated if all costs are not included
4. It does not take into account non-financial benefits.

For a more comprehensive analysis, it is recommended to use ROI in conjunction with other financial indicators.

In conclusion, ROI is a valuable tool for assessing the profitability of an investment, but it must be used judiciously and with an awareness of its limitations. A comprehensive approach, considering risk, duration, and other relevant factors, will enable more informed investment decisions.