# OEMs versus contract manufacturers: who captures the margin
An iPhone and the factory that assembles it sit on opposite ends of one of the widest profit gaps in global business. Apple's operating margins have run above 40% for years (Apple, company financial filings, estimate for recent fiscal years). Foxconn, the Taiwanese company that assembles most iPhones, typically posts net margins in the low single digits, often around 2 to 3% (Foxconn/Hon Hai annual reports, estimate). Same product, wildly different economics. Neither company owns a mystery machine the other lacks. What separates them is who owns the design, the brand, and the customer, not who owns the factory.
This lesson unpacks that gap and what it tells you about power in manufacturing generally.
OEM here means "original equipment manufacturer" in its popular usage: the brand that designs and sells the final product (Apple, Nike, Dell). Technically the term originally described a parts supplier, but common industry usage now applies it to brand owners. This lesson uses the popular meaning.
Contract manufacturer (CM): a company that builds products designed by someone else, to that company's specifications, usually under confidentiality agreements. Foxconn (Hon Hai Precision Industry), Pegatron, and Wistron build most of the world's smartphones and laptops without their names ever appearing on the box.
EMS stands for "electronics manufacturing services," the industry label for companies like Foxconn, Flex, Jabil, and Celestica that do this at scale across many client brands.
The OEM owns:
The CM owns:
The CM's expertise is real and hard to replicate. Foxconn can ramp a production line to make tens of millions of units in months, something few companies on earth can do. But that capability is a service it sells, priced competitively against other CMs who can do roughly the same thing. Design and brand are scarcer.
Margin follows scarcity and switching cost, not who works hardest or takes the most operational risk.
Apple's advantage is defensible: chip designs, software (iOS), retail experience, and a brand customers pay a premium for. If Apple's margins compress, it can raise prices or launch a new feature, and customers largely stay. That's pricing power.
Foxconn's position is structurally weaker. Multiple EMS players (Pegatron, Wistron, Luxshare in China) can build comparable devices. Apple can, and periodically does, shift volume between assemblers to negotiate better terms or diversify geographic risk. This multi-sourcing keeps CM margins compressed by design. It's a deliberate feature of how OEMs manage suppliers, not an accident.
This is the core lesson: capturing margin requires something the customer cannot easily get elsewhere. Apple has that. Foxconn largely does not, at least not with any single OEM customer.
Customer concentration cuts against the CM. Apple reportedly represents a very large share of Foxconn's revenue (estimates commonly cite around half or more in various years). That concentration gives Apple enormous negotiating leverage. Losing Apple's business would be catastrophic for Foxconn; losing Foxconn as an assembler is a disruption for Apple, but one it can manage by shifting volume to Pegatron, Wistron, or ramping capacity elsewhere (India, Vietnam).
Component suppliers occupy a middle tier. Companies making specialized parts, TSMC (chips), Samsung (displaysdisplaysThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → and memory), Qualcomm (modem chips), often capture better margins than assemblers because they hold real IP or manufacturing capability few others can match. TSMC's advanced chip fabricationfabricationA hallucination is when an AI model generates output that is fluent and confident but factually wrong, fabricated, or unsupported by its source data.View full definition → is a near-monopoly at the leading edge, and its margins reflect that (TSMC has historically posted gross margins well above 50%, company filings, estimate). This shows the same rule applying inside the supply chain: specialized, hard-to-replicate capability captures margin; commodity assembly does not.
Regulators shape where power can concentrate. Antitrust bodies like the US Federal Trade Commission (FTC) and the European Commission's competition directorate scrutinize dominant chip and component suppliers more than assemblers, because concentration risk (few alternative suppliers) is where market power and potential abuse live. You rarely see antitrust action against contract assemblers; you do see it around dominant chipmakers and platform owners.
Geopolitics adds a layer. US and EU policy (such as the US CHIPS Act, aimed at reshoring semiconductor manufacturing) increasingly treats certain manufacturing capabilities, especially chips, as national security assets. That elevates the strategic (and political) weight of component makers relative to assemblers, even though assembly is more labor-intensive and visible.
For a concrete look at how this plays out in the smartphone supply chain, the Center for Strategic and International Studies has published accessible analysis on semiconductor supply chain concentration.
🎬 [VIDEO: "How Foxconn Makes Your iPhone" - youtube.com/@wsj - Wall Street Journal-style explainer on Foxconn's assembly process and its economic relationship with Apple, illustrating scale versus margin]
Imagine a device that sells to consumers for $1,000.
Rough illustration:
| Line item | Approx. share of $1,000 retail price (estimate) |
|---|---|
| Components (chips, display, memory) | ~35-40% |
| Assembly/labor (CM's take) | ~3-5% |
| OEM margin, marketing, distribution | ~35-40% |
| Retail/channel margin | remainder |
These are illustrative estimates drawn from widely cited teardown-style analyses (sources like Counterpoint Research and TechInsights publish periodic teardown cost breakdowns), not exact figures for any specific device or year. The point isn't precision, it's proportion: assembly is a thin slice even though it's the most visible, labor-intensive stage.
Knowledge check
1. Apple and Foxconn have very different margins despite being part of the same supply chain for the same product. What primarily explains this gap?
2. A startup designs a new wireless speaker, holds the patents, and sells it under its own brand, but hires an outside company to physically build the units to its specifications. In this arrangement, the startup is acting as the ___ and the manufacturer is acting as the ___.
3. Why might a contract manufacturer struggle to capture higher margins even if it becomes extremely efficient at production?
4. Select ALL correct answers describing what an OEM (brand owner) typically retains control over, according to the lesson.
Select all the correct answers.
5. Select ALL correct answers about what contract manufacturers (CMs) and EMS companies typically contribute to the value chain.
Select all the correct answers.
Some try. Foxconn has invested in electric vehicle manufacturing platforms and even attempted to build its own branded ventures, aiming to capture design and IP value rather than just assembly fees. Flex and Jabil offer "design and engineering services" alongside manufacturing, trying to embed themselves earlier in the value chain where margin lives.
This is the strategic logic every CM eventually confronts: assembly alone has a ceiling. Moving toward design ownership, proprietary processes, or owning a niche (like TSMC's chip fabricationfabricationA hallucination is when an AI model generates output that is fluent and confident but factually wrong, fabricated, or unsupported by its source data.View full definition → moatmoatA lasting edge over competitors: a resource, capability or position they cannot easily replicate, letting a firm earn above-average returns over time.View full definition →) is the only path to durable margin improvement. It's difficult and slow, and most EMS players remain primarily assemblers because switching business models, and unwinding customer trust built on being "neutral" and confidentiality-safe, is hard.