Capex vs Maintenance Capex
Capex is the total cash a company spends on long-lived assets; maintenance capex is only the slice needed to keep current capacity intact.
The difference
Capex — capital expenditures — is the cash a company spends to buy, build, or upgrade long-lived physical and intangible assets like property, plant, and equipment. It comes straight off the cash flow statement's investing section, usually as "purchases of property, plant, and equipment," shown as an outflow. Maintenance capex is a subset of that same spending: the portion a company must make just to maintain its current productive capacity, not to grow it. The distinction is conceptual, not accounting — analysts separate maintenance capex from growth capex, but companies rarely disclose the breakdown, so total capex is a reported figure while maintenance capex is an estimate. Neither is the better metric: one tells you what was actually spent, the other tries to tell you how much of that spending was unavoidable.
Side by side
| Aspect | Capital Expenditures | Maintenance Capex |
|---|---|---|
| What it measures | All cash spent on long-lived assets — sustaining and expanding alike | Only the spending needed to hold current productive capacity steady |
| Where the number comes from | Reported directly in the cash flow statement's investing section | Not disclosed — estimated (depreciation proxy, or the footprint method) |
| Objectivity | An audited figure; two analysts read the same number | A judgment call; two analysts can reach different numbers for one firm |
| What it feeds | Free cash flow — capex reduces FCF dollar for dollar | Owner earnings — net income plus non-cash charges minus maintenance capex |
| Main weakness | Bundles upkeep and expansion, so heavy spenders all look alike | Subjective; depreciation understates it under inflation or fast growth |
| Accounting treatment | Capitalized and depreciated; IFRS and US GAAP differ on what qualifies | No separate treatment — it is an analytical split of the same line |
Which one to use
Reach for Capital Expenditures when…
Use total capex when you want a reported, checkable number. It is the right lens for gauging capital intensity — how much cash the business absorbs to operate and expand — and it is what actually reduces free cash flow. Because it is disclosed rather than estimated, it is also the safer basis for comparing companies without importing your own assumptions.
Reach for Maintenance Capex when…
Use maintenance capex when the question is how much of the spending is unavoidable versus discretionary. It is the lens behind owner earnings, and it is what surfaces a specific risk: a company can flatter its free cash flow by deferring upkeep, so near-term numbers look healthy while the asset base quietly degrades. Just remember you are working with an estimate, and say so.
The common mistake is treating the two as interchangeable in a cash flow calculation. Subtracting total capex and concluding a heavy expander "generates no cash" ignores that much of the spend was optional growth; the mirror error is plugging depreciation in as maintenance capex and calling the entire remainder growth — which understates real upkeep and flatters owner earnings whenever replacement costs run ahead of book depreciation, as they do under inflation or rapid growth. Deferred upkeep is a separate trap that runs the other way: a company that skimps on maintenance reports low capex and healthy near-term free cash flow while its asset base quietly degrades. Compounding both: people quote an estimated maintenance capex figure as if it were a reported one, when it is an analyst judgment that varies from person to person for the very same firm.
How Quintarthai uses them
Total capex appears as a reported cash flow line in the company financials and screener data on /app/, where it flows into free cash flow; maintenance capex appears only where an estimate is explicitly labelled as such, never as a disclosed figure. Both are shown for education and analysis — not as recommendations.