Legendary fund manager Li Lu (who Charlie Munger backed) once said, '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. We note that Iridium Communications Inc. (NASDAQ:IRDM) does have debt on its balance sheet. But should shareholders be worried about its use of debt?

Why Does Debt Bring Risk?

Debt is a tool to help businesses grow, but if a business is incapable of paying off its lenders, then it exists at their mercy. In the worst case scenario, a company can go bankrupt if it cannot pay its creditors. 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. By replacing dilution, though, debt can be an extremely good tool for businesses that need capital to invest in growth at high rates of return. When we think about a company's use of debt, we first look at cash and debt together.

View our latest analysis for Iridium Communications

What Is Iridium Communications's Net Debt?

The image below, which you can click on for greater detail, shows that Iridium Communications had debt of US$1.48b at the end of September 2023, a reduction from US$1.59b over a year. However, it also had US$67.9m in cash, and so its net debt is US$1.41b.

How Healthy Is Iridium Communications' Balance Sheet?

Zooming in on the latest balance sheet data, we can see that Iridium Communications had liabilities of US$119.0m due within 12 months and liabilities of US$1.66b due beyond that. Offsetting these obligations, it had cash of US$67.9m as well as receivables valued at US$100.7m due within 12 months. So its liabilities outweigh the sum of its cash and (near-term) receivables by US$1.61b.

While this might seem like a lot, it is not so bad since Iridium Communications has a market capitalization of US$4.55b, 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.

We use two main ratios to inform us about debt levels relative to earnings. The first is net debt divided by earnings before interest, tax, depreciation, and amortization (EBITDA), while the second is how many times its earnings before interest and tax (EBIT) covers its interest expense (or its interest cover, for short). This way, we consider both the absolute quantum of the debt, as well as the interest rates paid on it.

While Iridium Communications's debt to EBITDA ratio (3.6) suggests that it uses some debt, its interest cover is very weak, at 1.0, suggesting high leverage. It seems that the business incurs large depreciation and amortisation charges, so maybe its debt load is heavier than it would first appear, since EBITDA is arguably a generous measure of earnings. So shareholders should probably be aware that interest expenses appear to have really impacted the business lately. The good news is that Iridium Communications grew its EBIT a smooth 34% over the last twelve months. Like the milk of human kindness that sort of growth increases resilience, making the company more capable of managing debt. There's no doubt that we learn most about debt from the balance sheet. But it is future earnings, more than anything, that will determine Iridium Communications'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.

But our final consideration is also important, because a company cannot pay debt with paper profits; it needs cold hard cash. So the logical step is to look at the proportion of that EBIT that is matched by actual free cash flow. Happily for any shareholders, Iridium Communications actually produced more free cash flow than EBIT over the last three years. That sort of strong cash conversion gets us as excited as the crowd when the beat drops at a Daft Punk concert.

Our View

Iridium Communications's conversion of EBIT to free cash flow suggests it can handle its debt as easily as Cristiano Ronaldo could score a goal against an under 14's goalkeeper. But we must concede we find its interest cover has the opposite effect. Looking at all the aforementioned factors together, it strikes us that Iridium Communications can handle its debt fairly comfortably. Of course, while this leverage can enhance returns on equity, it does bring more risk, so it's worth keeping an eye on this one. 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 be aware of the 1 warning sign we've spotted with Iridium Communications .

Of course, if you're the type of investor who prefers buying stocks without the burden of debt, then don't hesitate to discover our exclusive list of net cash growth stocks, today.

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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.