CapEx vs. OpEx: What's the Real Difference?

CapEx is money spent on things you'll own and use for years, such as buildings, servers and machinery. OpEx is the ongoing cost of running the business, such as rent, salaries and subscriptions. The bucket a cost lands in changes when it shows up in profit.

The key difference is timing. An OpEx cost hits profit immediately, with the full amount expensed in the period it's incurred. A CapEx purchase doesn't touch profit directly at all: it lands on the balance sheet as an asset, then enters the income statement gradually as depreciation, a slice of the cost expensed each year over the asset's useful life. So if you build your own data centers the cash leaves today, but each year's profit absorbs only one depreciation slice, whereas renting cloud servers means every monthly bill reduces that month's profit in full. Same computing, very different profit timing, with knock-on effects for taxes and cash-flow presentation. One consequence is worth knowing: EBITDA is calculated before depreciation, so a CapEx-heavy company's spending never appears in its EBITDA at all. That's why investors read the capital-expenditure line alongside EBITDA, never instead of it.

Buying a car versus taking Ubers. The car is one big purchase that serves you for years while slowly wearing out, while Ubers cost you something every single month you ride. Neither is automatically cheaper, since the same travel just hits your wallet on completely different schedules.