What is CapEx and what does capex mean?

The difference between capex and opex is one of the most basic and useful in corporate finance. CapEx (capital expenditure) is the investment in long-lived assets that are capitalised on the balance sheet and depreciated over several years: buying a factory, a machine or a fleet. OPEX (operating expense) is the current expenditure consumed in the financial year itself and charged in full against the year's result: salaries, rents, supplies, marketing, raw materials.

The distinction is not merely accounting: it changes how the company is seen. An expense treated as opex reduces profit all at once; treated as capex, it is spread over the years via depreciation, which inflates current profit. This leaves room for a certain accounting engineering: capitalising expenses that are actually current "improves" short-term profit. That is why it is worth watching companies that capitalise aggressively, and that is why free cash flow —which subtracts all capex— is such a useful detector of dressed-up profits.

There is also an underlying trend: many modern companies turn capex into opex by shifting from buying to renting (for example, cloud computing instead of buying their own servers). This reduces capex and increases opex, changing the cash flow profile without the business changing its nature. Understanding what capex means versus opex helps to compare companies that have made different buy-or-rent decisions.

Separating maintenance capex from growth capex is one of the most valuable —and most difficult— analyses an investor can do. Maintenance is the minimum for the business to keep producing the same next year; growth is the investment that expands capacity or enters new markets. The company rarely reports them separately, so they have to be estimated, and a common approximation is to equate maintenance capex with the depreciation for the period.

Why it matters: a company that reports a low free cash flow because it is investing heavily in growing is not comparable to another with low FCF because it barely has cash left after maintenance. The first could "release" a lot of cash as soon as it stopped expanding; the second could not. That is why serious investors calculate an "owner's" FCF that deducts only maintenance capex, to see the true cash-generating ability of the business in a steady state.

This logic is central to valuation. DeepTicker's Reverse DCF discounts real free cash flow (with all capex subtracted), but its multi-phase model recognises that today's growth capex feeds tomorrow's cash: that is why growth is not projected flat, but moderated year by year until it approaches that of the economy. So a company that invests today to grow is not unfairly penalised by a low present FCF if that capex is reasonable and profitable.

Capex by sector draws two opposite worlds. Capital-light businesses (asset-light) —software, professional services, brand management, digital platforms— need little capex because their value lies in intangibles and people, not in physical assets. They usually have low capital intensity (capex over sales in the low single digits), generate a lot of free cash and exhibit high returns on capital. That is why the market grants them high multiples.

At the opposite extreme are capital-intensive businesses (asset-heavy): utilities, telecommunications, airlines, railways, industrial manufacturers, oil companies and semiconductors. They must reinvest enormous sums every year —sometimes 15-25% of their sales or more— just to maintain and renew their networks, fleets, plants or factories. Their EBITDA can be impressive, but capex eats up much of that cash, leaving a free cash flow much more modest than the profit suggests.

This difference explains why EV/EBITDA misleads in capital-intensive sectors (it ignores capex) and why FCF and FCF yield are so revealing there. DeepTicker compares each company's capital intensity and returns against its sector within the DeepScore grade, with benchmarks by industry, so that a high capex is judged as normal in a utility but as a warning sign in a company that is supposed to be light. So you avoid comparing businesses of different nature as if they were the same.

To see the capex of a stock in DeepTicker, search its ticker or name and open its profile. In the cash flow analysis you will find the year's capex alongside the operating cash flow and the resulting free cash flow, as well as its evolution over several years and its relationship with sales (capital intensity). Every figure comes explained step by step, no black boxes, so you understand how much the company reinvests and how much cash it really has left free, learning to read it as you use it.

Capex is not an isolated figure: it conditions valuation and quality. DeepTicker's Reverse DCF (a discounted cash flow valuation) discounts the free cash flow already net of capex, using the real cost of capital of each industry, to show you what cash growth the price discounts. And the DeepScore grade rewards companies that grow with little capex and high ROIC —the mark of a good business— and views with caution those that devour capital to keep pace.

With the search tool and the screener you can filter companies by capital intensity and cash generation —for example, capital-light businesses with high FCF within a sector— to locate candidates to analyse in depth. Remember that DeepTicker offers information and analysis so that you decide, never advice: the idea is that you understand how much it really costs to maintain and grow a business before judging whether its price is reasonable.