The external fund manager backed by Berkshire Hathaway's Charlie Munger, Li Lu, makes no bones about it when he says 'The biggest investment risk is not the volatility of prices, but whether you will suffer a permanent loss of capital.' So it might be obvious that you need to consider debt, when you think about how risky any given stock is, because too much debt can sink a company. As with many other companies 3M Company (NYSE:MMM) makes use of debt. But the real question is whether this debt is making the company risky.

What Risk Does Debt Bring?

Generally speaking, debt only becomes a real problem when a company can't easily pay it off, either by raising capital or with its own cash flow. If things get really bad, the lenders can take control of the business. While that is not too common, we often do see indebted companies permanently diluting shareholders because lenders force them to raise capital at a distressed price. Of course, plenty of companies use debt to fund growth, without any negative consequences. When we examine debt levels, we first consider both cash and debt levels, together.

Check out our latest analysis for 3M

What Is 3M's Debt?

As you can see below, 3M had US$16.1b of debt at March 2023, down from US$16.7b a year prior. On the flip side, it has US$3.97b in cash leading to net debt of about US$12.1b.

A Look At 3M's Liabilities

The latest balance sheet data shows that 3M had liabilities of US$10.6b due within a year, and liabilities of US$21.0b falling due after that. Offsetting this, it had US$3.97b in cash and US$4.64b in receivables that were due within 12 months. So its liabilities total US$22.9b more than the combination of its cash and short-term receivables.

This deficit isn't so bad because 3M is worth a massive US$54.4b, and thus could probably raise enough capital to shore up its balance sheet, if the need arose. But we definitely want to keep our eyes open to indications that its debt is bringing too much risk.

We measure a company's debt load relative to its earnings power by looking at its net debt divided by its earnings before interest, tax, depreciation, and amortization (EBITDA) and by calculating how easily its earnings before interest and tax (EBIT) cover its interest expense (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).

We'd say that 3M's moderate net debt to EBITDA ratio ( being 1.8), indicates prudence when it comes to debt. And its strong interest cover of 13.4 times, makes us even more comfortable. Shareholders should be aware that 3M's EBIT was down 34% last year. If that earnings trend continues then paying off its debt will be about as easy as herding cats on to a roller coaster. When analysing debt levels, the balance sheet is the obvious place to start. But it is future earnings, more than anything, that will determine 3M's ability to maintain a healthy balance sheet going forward. So if you want to see what the professionals think, you might find this free report on analyst profit forecasts to be interesting.

Finally, while the tax-man may adore accounting profits, lenders only accept cold hard cash. So we always check how much of that EBIT is translated into free cash flow. Over the last three years, 3M recorded free cash flow worth a fulsome 80% of its EBIT, which is stronger than we'd usually expect. That puts it in a very strong position to pay down debt.

Our View

Based on what we've seen 3M is not finding it easy, given its EBIT growth rate, but the other factors we considered give us cause to be optimistic. There's no doubt that its ability to to cover its interest expense with its EBIT is pretty flash. Looking at all this data makes us feel a little cautious about 3M's debt levels. While debt does have its upside in higher potential returns, we think shareholders should definitely consider how debt levels might make the stock more risky. There's no doubt that we learn most about debt from the balance sheet. However, not all investment risk resides within the balance sheet - far from it. We've identified 3 warning signs with 3M , and understanding them should be part of your investment process.

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.