Maintenance Capex vs. Growth Capex: Why It Matters

In a January 2026 filing, CVR Partners — the nitrogen fertilizer partnership that runs plants in Coffeyville, Kansas and East Dubuque, Illinois — told investors it expected to spend $35 million to $45 million on "maintenance capital" in 2026, plus a separate $25 million to $30 million on "growth capital." Two line items. Two different investment cases. Together they made up a $60 million to $75 million capital budget, against net sales of roughly $606 million the year before.

Most companies don't give you that split. The 10-K reports one number — capital expenditures — sitting in the investing section of the cash flow statement, undifferentiated. Whether that number represents a business standing still, replacing worn equipment to keep current operations running, or a business expanding into new capacity, is left for the reader to work out alone. And that distinction is not cosmetic: one dollar protects the earnings power you already have, the other is a bet on earning more later, at a return that may or may not clear the cost of capital. Lump them together and you're averaging a maintenance bill with a growth investment, then calling the average "capital intensity" as though it meant one thing.

I'll walk through how to estimate the split when a company won't hand it to you, why the standard shortcut — using depreciation and amortization as a stand-in for maintenance capex — breaks down more often than it's given credit for, and how the maintenance slice specifically changes what "true" free cash flow means for a business.

Why the Split Isn't a GAAP Requirement

GAAP requires companies to report capital expenditures within investing activities on the cash flow statement (ASC 230) — a single aggregate figure. Nothing in GAAP requires disclosing how much of that figure sustains existing capacity versus expands it. Any maintenance-versus-growth split that does appear is voluntary, and it usually lives in the MD&A's "Liquidity and Capital Resources" section rather than in the financial statements themselves.

Absent that voluntary disclosure, the standard workaround treats depreciation and amortization as a stand-in for maintenance capex. The logic is straightforward: D&A represents the accounting cost of consuming existing assets during the period, so spending roughly that amount should replace what wore out, and anything above it funds growth.

Naive maintenance-capex proxy: Maintenance Capex ≈ Depreciation & Amortization (same period, cash flow statement) The assumption behind it: assets are being replaced at roughly the pace they're being depreciated. It holds up reasonably well for mature, slow-growing businesses with a stable asset base — and degrades everywhere else.

I'll admit the proxy is a blunt instrument. Dead reckoning is a fairer description than estimation. Depreciation schedules are set at acquisition, using useful-life assumptions management chooses; they don't adjust for replacement-cost inflation, technological obsolescence that shortens an asset's real economic life, or a business that's still growing into assets bought years ago. For any company doing meaningful growth investment, I'd treat the D&A proxy as directional at best, never precise.

Take a hypothetical manufacturer reporting $200 million of D&A and $260 million of total capex in a given year. The naive proxy assigns $200 million to maintenance and $60 million to growth — implying capacity is expanding by roughly 30% above what it takes to stand still. If revenue grew 4% that year while implied capacity grew 30% ahead of depreciation, the mismatch is a research trigger, not a dead end: either the growth spending is aimed at a future period's revenue, the depreciation schedule is running slower than real asset lives, or the "growth" bucket is quietly absorbing costs that are really maintenance wearing a better label.

CVR Partners and Chipotle: Two Versions of Disclosure

CVR Partners' split is about as clean as this disclosure gets. The maintenance bucket funds turnarounds, safety work, and reliability projects at the two nitrogen plants — spending required to keep the facilities running at current output. The growth bucket funds a specific, named list: an ammonia expansion and feedstock-diversification project at Coffeyville, water-quality upgrades at both sites, and expanded diesel exhaust fluid production and loadout capacity. Full-year 2025 net income was $99 million on those $606 million in net sales, up from $61 million on $525 million a year earlier — a business generating real cash, spending a meaningful share of it on plant upkeep before a dollar reaches growth.

But management's own label deserves scrutiny too, not blind trust. "Growth" is a more flattering word to attach to a capex line than "maintenance" — it frames spending as a choice rather than an obligation, and it's excluded from some companies' definitions of "adjusted" free cash flow entirely. If a company starts reclassifying capex from maintenance to growth without any real change in what the money is being spent on, that reclassification is itself worth flagging, the same way a sudden change in revenue recognition policy would be.

Chipotle's fiscal 2024 Form 10-K offers a partial version of the same disclosure, embedded in forward guidance rather than results. Total capital expenditures for fiscal 2024 were $593.6 million against $11,313.9 million in revenue — a capex-to-revenue ratio a little over 5%, itself a sign of how much lighter a restaurant chain's asset base is than a chemical manufacturer's. Alongside that 10-K, the company guided to $683.7 million in total capital expenditures for fiscal 2025, with $502.7 million allocated specifically to new restaurant construction. That leaves roughly $181 million for everything else — existing-restaurant reinvestment, kitchen technology, corporate infrastructure. It isn't a clean maintenance-versus-growth label the way CVR Partners uses one; the remainder bucket mixes true maintenance with technology spending that arguably belongs in growth. But it's still a real, disclosed split, on a company whose total capex would otherwise sit in the filing as a single undifferentiated figure.

From Total Capex to True Free Cash Flow

The standard free cash flow formula — operating cash flow minus total capital expenditures — treats maintenance and growth spending as economically identical. They aren't. James Whitfield's recent piece on pricing capital-light versus capital-heavy businesses builds owner earnings by subtracting total capex from net income plus D&A — a reasonable simplification when you're screening dozens of names quickly for how capital-intensive they are. But subtracting growth capex the same way you subtract maintenance capex understates what a business could actually distribute if management simply chose to stop growing it.

The more precise version: true free cash flow is operating cash flow minus maintenance capex alone. Growth capex isn't a cost of staying in business — it's a reinvestment decision the business is choosing to make, and it deserves to be evaluated as one, on its own merits, rather than folded silently into a cash-generation floor. For CVR Partners, that means the $35 million to $45 million maintenance figure — not the full $60 million to $75 million budget — is the more honest deduction from operating cash flow if you're asking what the business could hand to owners today, growth ambitions aside. Whether it should hand that cash to owners, or keep reinvesting it, is a separate question — and one the growth-capex return answers, not the maintenance figure.

Judging the Growth Slice on Its Own Terms

Once maintenance capex is set aside as the true cost of standing still, growth capex should be judged the way any discretionary investment is judged: by the return on invested capital it's expected to generate on the incremental dollars deployed, not treated as an automatic cash drag. A dollar of CVR Partners' ammonia-expansion spending is a bet that the incremental EBITDA it produces clears the partnership's cost of capital by a healthy margin — the same underwriting question a private equity investor would ask before committing capital, applied to a public 10-K instead of a data room.

The honest version of this exercise rarely produces a single trustworthy number. It produces a range, bounded by how confident you are in the maintenance estimate on one side and the growth-project return assumptions on the other — a compass, not a ledger entry. So treat both halves as living estimates, revisited every filing cycle, rather than a split you calculate once and carry forward for years.

Where the Estimate Breaks Down

Subscription and Asset-Light Businesses

For software and subscription businesses, D&A is dominated by amortization of capitalized software and acquired intangibles, not physical asset replacement. Using it as a maintenance-capex proxy tends to overstate what these businesses actually need to spend just to stand still, because so little of their reported capex goes toward maintaining what already exists — most of it is aimed at new capacity, new products, or new markets, and gets misclassified as "maintenance" purely because it clears the D&A bar.

When the Growth Label Is Doing Too Much Work

The 10-K reveals the answer if you actually read the project-level description in the MD&A rather than trusting a maintenance-or-growth label at face value. Ordinary equipment replacement dressed up as "capacity expansion," or a facility upgrade required by regulation relabeled as discretionary growth, both distort the split in the same direction — flattering reported cash flow conversion by shrinking the maintenance bucket a company is implicitly claiming credit for skipping. Neither distortion shows up as a lie anywhere in the filing. They show up as a label that doesn't quite match the project description two paragraphs below it.

Key Takeaways

• GAAP requires one aggregate capex figure; any maintenance-versus-growth split is voluntary disclosure, usually buried in the MD&A rather than the financial statements.
• Depreciation and amortization is a workable but blunt proxy for maintenance capex — reliable for mature, stable businesses, unreliable for fast-growing or asset-light ones.
• True free cash flow subtracts maintenance capex alone, not total capex; growth capex should be judged separately, on the return it earns on incremental invested capital.
• When a company does disclose the split explicitly — as CVR Partners does — read the project list behind each bucket rather than trusting the maintenance or growth label on its own.