Howard Marks put it nicely when he said that, rather than worrying about share price volatility, 'The possibility of permanent loss is the risk I worry about... and every practical investor I know worries about.' So it seems the smart money knows that debt - which is usually involved in bankruptcies - is a very important factor, when you assess how risky a company is. As with many other companies Marathon Petroleum Corporation (NYSE:MPC) makes use of debt. But the more important question is: how much risk is that debt creating?

Why Does Debt Bring Risk?

Debt and other liabilities become risky for a business when it cannot easily fulfill those obligations, either with free cash flow or by raising capital at an attractive price. Part and parcel of capitalism is the process of 'creative destruction' where failed businesses are mercilessly liquidated by their bankers. However, a more common (but still painful) scenario is that it has to raise new equity capital at a low price, thus permanently diluting shareholders. Of course, plenty of companies use debt to fund growth, without any negative consequences. When we think about a company's use of debt, we first look at cash and debt together.

What Is Marathon Petroleum's Debt?

As you can see below, Marathon Petroleum had US$26.8b of debt, at March 2024, which is about the same as the year before. You can click the chart for greater detail. However, it does have US$7.57b in cash offsetting this, leading to net debt of about US$19.3b.

How Healthy Is Marathon Petroleum's Balance Sheet?

According to the last reported balance sheet, Marathon Petroleum had liabilities of US$21.8b due within 12 months, and liabilities of US$34.0b due beyond 12 months. On the other hand, it had cash of US$7.57b and US$13.2b worth of receivables due within a year. So its liabilities total US$35.0b more than the combination of its cash and short-term receivables.

While this might seem like a lot, it is not so bad since Marathon Petroleum has a huge market capitalization of US$61.3b, and so it could probably strengthen its balance sheet by raising capital if it needed to. But it's clear that we should definitely closely examine whether it can manage its debt without dilution.

In order to size up a company's debt relative to its earnings, we calculate its net debt divided by its earnings before interest, tax, depreciation, and amortization (EBITDA) and its earnings before interest and tax (EBIT) divided by its interest expense (its interest cover). The advantage of this approach is that we take into account both the absolute quantum of debt (with net debt to EBITDA) and the actual interest expenses associated with that debt (with its interest cover ratio).

Marathon Petroleum's net debt is only 1.3 times its EBITDA. And its EBIT easily covers its interest expense, being 14.6 times the size. So you could argue it is no more threatened by its debt than an elephant is by a mouse. It is just as well that Marathon Petroleum's load is not too heavy, because its EBIT was down 49% over the last year. When a company sees its earnings tank, it can sometimes find its relationships with its lenders turn sour. There's no doubt that we learn most about debt from the balance sheet. But ultimately the future profitability of the business will decide if Marathon Petroleum can strengthen its balance sheet over time. So if you're focused on the future you can check out this free report showing analyst profit forecasts.

Finally, a company can only pay off debt with cold hard cash, not accounting profits. So we clearly need to look at whether that EBIT is leading to corresponding free cash flow. Over the most recent three years, Marathon Petroleum recorded free cash flow worth 77% of its EBIT, which is around normal, given free cash flow excludes interest and tax. This free cash flow puts the company in a good position to pay down debt, when appropriate.

Our View

Marathon Petroleum's EBIT growth rate was a real negative on this analysis, although the other factors we considered were considerably better. In particular, we are dazzled with its interest cover. Looking at all this data makes us feel a little cautious about Marathon Petroleum's debt levels. While we appreciate debt can enhance returns on equity, we'd suggest that shareholders keep close watch on its debt levels, lest they increase. The balance sheet is clearly the area to focus on when you are analysing debt. But ultimately, every company can contain risks that exist outside of the balance sheet. To that end, you should learn about the 3 warning signs we've spotted with Marathon Petroleum (including 1 which is a bit unpleasant) .

When all is said and done, sometimes its easier to focus on companies that don't even need debt. Readers can access a list of growth stocks with zero net debt 100% free, right now.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.