The term debt ratio refers to a financial ratio that measures the extent of a company’s leverage. The debt ratio is defined as the ratio of total debt to total assets, expressed as a decimal or percentage. It can be interpreted as the proportion of a company’s assets that are financed by debt. A ratio greater than 1 shows that a considerable portion of a company's debt is funded by assets, which means the company has more liabilities than assets. A high ratio indicates that a company may be at risk of default on its loans if interest rates suddenly rise. A ratio below 1 means that a greater portion of a company's assets is funded by equity.12

• A debt ratio measures the amount of leverage used by a company in terms of total debt to total assets.

• This ratio varies widely across industries, such that capital-intensive businesses tend to have much higher debt ratios than others.

• A company's debt ratio can be calculated by dividing total debt by total assets.

• A debt ratio of greater than 1.0 or 100% means a company has more debt than assets while a debt ratio of less than 100% indicates that a company has more assets than debt.

• Some sources consider the debt ratio to be total liabilities divided by total assets.

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As noted above, a company's debt ratio is a measure of the extent of its financial leverage. This ratio varies widely across industries. Capital-intensive businesses, such as utilities and pipelines tend to have much higher debt ratios than others like the technology sector.

The formula for calculating a company's debt ratio is:

\begin{aligned} &\text{Debt ratio} = \frac{\text{Total debt}}{\text{Total assets}} \end{aligned}​Debt ratio=Total assetsTotal debt​​

So if a company has total assets of $100 million and total debt of $30 million, its debt ratio is 0.3 or 30%. Is this company in a better financial situation than one with a debt ratio of 40%? The answer depends on the industry.

A debt ratio of 30% may be too high for an industry with volatile cash flows, in which most businesses take on little debt. A company with a high debt ratio relative to its peers would probably find it expensive to borrow and could find itself in a crunch if circumstances change. Conversely, a debt level of 40% may be easily manageable for a company in a sector such as utilities, where cash flows are stable and higher debt ratios are the norm.3

A debt ratio greater than 1.0 (100%) tells you that a company has more debt than assets. Meanwhile, a debt ratio of less than 100% indicates that a company has more assets than debt. Used in conjunction with other measures of financial health, the debt ratio can help investors determine a company's risk level.3

The fracking​ industry experienced tough times beginning in the summer of 2014 due to high levels of debt and plummeting energy prices.4

Some sources consider the debt ratio to be total liabilities divided by total assets. This reflects a certain ambiguity between the terms debt and liabilities that depends on the circumstance. The debt-to-equity ratio, for example, is closely related to and more common than the debt ratio, instead, using total liabilities as the numerator.

Financial data providers calculate it using only long-term and short-term debt (including current portions of long-term debt), excluding liabilities such as accounts payable, negative goodwill, and others.

In the consumer lending and mortgages business, two common debt ratios used to assess a borrower’s ability to repay a loan or mortgage are the gross debt service ratio and the total debt service ratio.

The gross debt ratio is defined as the ratio of monthly housing costs (including mortgage payments, home insurance, and property costs) to monthly income, while the total debt service ratio is the ratio of monthly housing costs plus other debt such as car payments and credit card borrowings to monthly income.5 Acceptable levels of the total debt service ratio range from the mid-30s to the low-40s in percentage terms.6

The higher the debt ratio, the more leveraged a company is, implying greater financial risk. At the same time, leverage is an important tool that companies use to grow, and many businesses find sustainable uses for debt. 

While the total debt to total assets ratio includes all debts, the long-term debt to assets ratio only takes into account long-term debts. The debt ratio (total debt to assets) measure takes into account both long-term debts, such as mortgages and securities, and current or short-term debts such as rent, utilities, and loans maturing in less than 12 months.

Both ratios, however, encompass all of a business's assets, including tangible assets such as equipment and inventory and intangible assets such as accounts receivables. Because the total debt to assets ratio includes more of a company's liabilities, this number is almost always higher than a company's long-term debt to assets ratio.