Westlake (NYSE:WLK) Has A Somewhat Strained Balance Sheet

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.' When we think about how risky a company is, we always like to look at its use of debt, since debt overload can lead to ruin. Importantly, Westlake Corporation (NYSE:WLK) does carry debt. But should shareholders be worried about its use of debt?

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What Risk Does Debt Bring?

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. Part and parcel of capitalism is the process of 'creative destruction' where failed businesses are mercilessly liquidated by their bankers. 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.

What Is Westlake's Net Debt?

The chart below, which you can click on for greater detail, shows that Westlake had US$4.66b in debt in September 2025; about the same as the year before. On the flip side, it has US$2.13b in cash leading to net debt of about US$2.53b.

How Strong Is Westlake's Balance Sheet?

The latest balance sheet data shows that Westlake had liabilities of US$2.90b due within a year, and liabilities of US$6.98b falling due after that. On the other hand, it had cash of US$2.13b and US$1.76b worth of receivables due within a year. So it has liabilities totalling US$5.99b more than its cash and near-term receivables, combined.

This is a mountain of leverage relative to its market capitalization of US$9.54b. This suggests shareholders would be heavily diluted if the company needed to shore up its balance sheet in a hurry.

View our latest analysis for Westlake

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). 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).

While Westlake has a quite reasonable net debt to EBITDA multiple of 2.4, its interest cover seems weak, at 0.69. In large part that's it has so much depreciation and amortisation. While companies often boast that these charges are non-cash, most such businesses will therefore require ongoing investment (that is not expensed.) Either way there's no doubt the stock is using meaningful leverage. Shareholders should be aware that Westlake's EBIT was down 96% 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 ultimately the future profitability of the business will decide if Westlake 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 the logical step is to look at the proportion of that EBIT that is matched by actual free cash flow. Over the most recent three years, Westlake recorded free cash flow worth 67% of its EBIT, which is around normal, given free cash flow excludes interest and tax. This cold hard cash means it can reduce its debt when it wants to.

Our View

To be frank both Westlake's interest cover and its track record of (not) growing its EBIT make us rather uncomfortable with its debt levels. But on the bright side, its conversion of EBIT to free cash flow is a good sign, and makes us more optimistic. Once we consider all the factors above, together, it seems to us that Westlake's debt is making it a bit risky. Some people like that sort of risk, but we're mindful of the potential pitfalls, so we'd probably prefer it carry less debt. The balance sheet is clearly the area to focus on when you are analysing debt. However, not all investment risk resides within the balance sheet - far from it. For instance, we've identified 1 warning sign for Westlake that you should be aware of.

If you're interested in investing in businesses that can grow profits without the burden of debt, then check out this free list of growing businesses that have net cash on the balance sheet.

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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.