To say an asset has depreciated is to say its value has been systematically reduced over time, at least on the company's books. Think of it like this: you buy a shiny new delivery van for your business for $50,000. You know it won't last forever. Instead of pretending you spent the full $50,000 in the first year, accounting rules let you spread that cost over the van's expected useful life, say, five years. This process of allocating the cost is called `Depreciation`. It's a crucial concept because it shows up as an expense on the `Income Statement`, reducing a company's reported `Earnings` and, therefore, its tax bill. The most important thing for an investor to remember is that depreciation is a non-cash charge. When the company books $10,000 in depreciation for the van, no actual cash leaves its bank account. This distinction is where savvy investors find an edge.
Wall Street is often obsessed with metrics like `Earnings Per Share (EPS)`, but a value investor knows that reported earnings can be misleading. Depreciation is one of the biggest reasons why. Since it's a non-cash expense, a company's true cash-generating power can be hidden behind a large depreciation charge.
Understanding depreciation helps you bridge the gap between accounting profits and real-world cash. A company with old, expensive machinery might report low net income because of high depreciation charges. However, if that machinery is well-maintained and still churning out products, the business could be gushing cash. This is because the cash for the machinery was spent years ago; the depreciation charge is just an accounting echo of that past expense. This is why legendary investors like `Warren Buffett` champion the concept of `Owner Earnings` (a close cousin of `Free Cash Flow (FCF)`). They start with reported earnings, but then add back non-cash charges like depreciation and subtract the estimated annual `Capital Expenditures (CapEx)` needed to keep the business running. This gives a much clearer picture of the cash available to shareholders.
Companies have some leeway in how they calculate depreciation, which is why it's important to understand the basic methods. The two main approaches are Straight-Line and Accelerated.
This is the simplest and most common method. The company takes the asset's cost, subtracts its estimated salvage value (what it might be worth at the end of its life), and divides the result by the number of years it's expected to be useful.
These methods, like the “Double-Declining Balance” method, book more depreciation expense in the early years of an asset's life and less in the later years. The logic is that an asset is typically more productive and efficient when it's new. This approach is more aggressive and has the benefit of reducing taxable income more in the early years, thus deferring tax payments. While it's perfectly legal, an investor should be aware when a company uses this method, as it can make earnings look lower in the short term.
When analyzing a company, don't just accept the depreciation number at face value. Dig a little deeper by asking these questions: