If you run a business, regardless of its size and capital, you can use ROI to measure the effectiveness of planned investments. This indicator will prove useful in measuring the profitability of marketing activities - advertisers use it to analyse the profitability of online campaigns. In this text, you will read what ROI is, how to calculate this indicator and what are the advantages and disadvantages of using it.
ROI - what does the acronym stand for?
If you advertise on Google's ad network, you must have come across the term ROI, because Google Ads campaigns are measured by it (although the Silicon Valley giant is just one example of companies that use ROI).
ROI - what does it mean? The abbreviation ROI comes from ROI (return of investment) is a profitability indicator that allows you to measure the profitability of your capital. It is a simple method that can be calculated from a simple formula. ROI assumes that:
- surplus net benefit is measured by accrued profit;
- the value of money is fixed.
ROI is a versatile tool that is used in various areas of business to calculate the percentage return on investment. ROI is often the first metric that influences decision-making after investors have taken action.
It is used to measure the effectiveness of marketing campaigns, especially online advertising activities (such as the aforementioned Google Ads campaigns) and website positioning.
Its popularity is also influenced by the fact that ROI allows us to accurately determine revenue and sales profits. ROI will enable us to measure the effectiveness of a company, a marketing project, training and many other activities. It can be used to estimate budgets and assess employee engagement. ROI is correlated with the conversion rate. 
How do you calculate the ROI?
The calculation of ROI is straightforward: it is made from the formula:
ROI = net profit/capital * 100%
Where:
Profit = income after deduction of costs;
capital = costs incurred to achieve profits.
An ROI of 30% means that every PLN invested earns 30 cents. The ROI can be positive or negative. If it is negative, the investment is unprofitable. The higher the ratio, the higher the profitability of the investment.
In order to calculate efficiency more accurately, the ROI is often compared to the WACC (weighted average cost of capital) - the value of the weighted average capital. When the ROI is greater than, or equal to, the WACC, the investment is profitable. An ROI below the WACC indicates an unprofitable investment:
ROI ≥ WACC - profitable investment;
ROI ≤ WACC - unprofitable investment.
To measure the effectiveness of online campaigns, ROAS (Return of Ad Spend) is also used. ROAS differs from ROI in that, when calculating ROAS, the result will be the effectiveness of the campaign expenditure only. When calculating ROI, the result will indicate the net profit for the period. Calculating ROI shows a more precise result, but variables must always be taken into account when interpreting it.
ROI - what are the advantages and disadvantages of using ROI?
Measuring cost-effectiveness by ROI has its advantages and disadvantages.
The advantage of ROI is that its calculation is simple. It is also easy to interpret the results of the measurement. ROI is a versatile measure; the profitability of many types of activities can be calculated with it. It works well in practically all business activities, which proves its effectiveness.
Unfortunately, this is an absolute method of measurement and among its
Disadvantages include the fact that it does not take into account changes in the value of money and the additional costs that, in addition to the capital for the investment, must also be incurred. ROI is also a rather general indicator, e.g. it does not show the reasons for the result achieved.
Now you are surely aware of how important ROI is. Its interpretation is quite simple, although not in every situation equally authoritative. ROI analysis makes it possible to estimate the profitability of actions taken. However, it is worth combining the data obtained in this way with other metrics in order to have a broader picture of the financial health of the company.
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