What return on assets tells you
Return on assets compares the profit a business earned over a period with the assets it used to earn it. Net income is the profit left after all expenses, interest and taxes. Total assets are everything the business owns, from cash, receivables and inventory to equipment and property, as recorded on the balance sheet.
A result of 8.0% means the business earned 8 of net income for every 100 of total assets it held, on average, during the period. A negative result means the business made a loss.
Reading a high or low result
What is normal for ROA varies widely between industries and business models. A business that needs a lot of property, plant and equipment usually reports a lower ROA than one that needs few physical assets, so compare like with like.
- A higher ROA can mean the business turns more of its sales into profit, gets more sales out of its assets, or both. It can also reflect an older asset base that has been heavily depreciated, which makes total assets look small.
- A lower ROA can point to thin margins or to assets that generate little revenue. It may also follow a large recent investment that has not yet started to earn.
ROA is most useful when you compare it with the same business in earlier periods, or with similar businesses that report on the same basis.
What ROA does not show
- It mixes operations with financing. Net income is after interest, so two businesses with identical operations but different amounts of debt report different ROA. Return on invested capital uses operating profit after tax instead, which leaves interest out.
- It relies on book values. Most assets are recorded at what they cost less depreciation, not at what they are worth today, and resources a business builds itself, such as a brand or a customer base, usually do not appear on the balance sheet at all.
- Net income for one period can include one-off gains or losses that move ROA without any change in the underlying business.
Average vs ending balances
Net income builds up over the whole period, while total assets are measured on a single date. Averaging the opening and closing balances matches a full period of profit with the assets the business held across that period. This matters most when assets changed sharply during the year, for example after a large purchase.
If you enter only the closing figure, the calculator uses ending total assets and says so in the result. Some published ROA figures use ending balances, so check the basis before you compare one with yours.
Common mistakes
- Using net income for one quarter and comparing the result with full-year ROA figures. A quarter’s profit set against a full balance sheet gives a much lower percentage.
- Reading a rise in ROA as better performance when it came from selling or writing down assets rather than from higher profit.
- Using only ending assets after a year of fast growth, which understates the return on the assets the business actually used for most of the year.
- Comparing ROA across businesses with very different asset needs and treating the whole gap as a difference in management.
Related measures
Return on equity divides the same net income by shareholders’ equity instead of total assets, so it shows the return to owners rather than the return on everything the business holds. ROE vs ROA sets out the difference. ROA also splits into two parts: net profit margin shows how much of each sale becomes profit, and asset turnover shows how much revenue the assets generate. Multiplied together, the two give ROA.