CapEx and OpEx
CapEx and OpEx are the two classifications finance applies to spending. Capital expenditures (CapEx) buy long-lived assets such as machines and tooling, which sit on the balance sheet and depreciate over years. Operating expenditures (OpEx) cover items consumed in the period, such as materials, MRO supplies, and services, and hit the P&L immediately. The classification determines approval paths, budget owners, and how each purchase gets scrutinized.
Examples
Tooling either way: A 4-cavity injection mold quotes at $85,000. Bought as CapEx, the molded part costs $1.42. Amortized over the first 500,000 shots instead, the tool adds $0.17 and the part becomes $1.59 with no capital request, but if the program ends at 400,000 units, $17,000 of tool cost is unrecovered and triggers a true-up.
Threshold behavior: A maintenance team needs 12 workbenches at $1,100 each. As a single $13,200 capital request the purchase waits for next year's plan; bought individually under the $2,500 capitalization threshold, the benches are OpEx against this year's cost center budget and arrive in three weeks. Finance writes anti-splitting rules precisely because of purchases like this.
Definition
The line between the two is policy as much as accounting. Most companies set a capitalization threshold, often a few thousand dollars, below which even long-lived items are expensed for simplicity. A $40,000 CNC fixture is CapEx depreciating over seven years; the $900 of inserts that cell consumes each month is OpEx. Same machine, two budgets, two sets of rules.
Classification changes behavior more than economics. CapEx requests typically need a capital appropriation with payback or IRR analysis and compete for a slot in an annual capital plan. OpEx flows through cost center budgets under routine budget management, with faster approvals and continuous spend. Procurement feels the difference as timing: capital orders bunch up right after plan approval and freeze near year-end, while operating spend runs all year.
In direct materials the boundary is negotiable. Injection mold tooling can be bought outright as the buyer's CapEx or folded into piece price through tooling amortization, which turns it into OpEx and raises unit cost. Equipment leases do the same conversion. A make-or-buy decision shifts whole cost structures between buckets: making in-house adds CapEx and fixed costs, while buying converts nearly everything to variable spend. Whatever the label, evaluate the purchase on total cost of ownership; the classification changes who approves, not what it costs.
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