Suppliers, mills and factories: the leverage hidden upstream

1. Scarce, non-substitutable know-how

Some capabilities cannot be moved or copied quickly.

• Como silk: the district processes a large share of Europe's high-end silk. The skills (printing, finishing) are concentrated in a few square kilometers. A luxury house needing that specific quality has few alternatives.
• Italian tanneries in Tuscany (vegetable-tanned leather) supply houses like Hermes and Bottega Veneta. You cannot spin up an equivalent tannery in 18 months.
• Japanese selvedge denim mills (Okayama region) command premium prices because the specific loom character is part of the product story.

When the input *is* the differentiation, the supplier captures margin.

2. Switching costs and lead times

Even a generic factory gains power once a brand depends on it. Moving production means re-sampling, re-testing quality, re-auditing for compliance, and rebuilding trust on delivery dates. That can take a full season or two. During that window, the factory has leverage on price and terms.

3. Concentration in certain countries

Cut-and-sew is geographically concentrated. Vietnam and Bangladesh are dominant for apparel volume; China remains the largest single apparel exporter globally. A Vietnamese factory that has invested in a brand's specific processes (say, technical sportswear seam-sealing for a Nike or Lululemon program) is not easily replaced, because that technical capability plus scale plus reliability is rare.

For a sense of how concentrated sourcing is, the WTO trade statistics portal tracks textile and apparel export shares by country and is free to explore.

Why brands still usually win

Despite the above, in most of the market the *brand* holds the whip. Why?

Fragmentation downstream vs. upstream. There are thousands of cut-and-sew factories competing for orders. For a basic cotton t-shirt, the brand can play factories against each other. The factory is a price-taker.

The brand owns the customer. The consumer wants the Nike swoosh, not the factory's name. Demand attaches to the brand, so the brand captures the largest slice of the final price.

Order size as a weapon. A brand placing millions of units can dictate terms to a factory whose entire year depends on that order. This is buyer power in its purest form.

So the real picture is a split market:

• Commodity inputs (basic knits, plain woven cotton): brand dominates, supplier squeezed.
• Differentiated inputs (Como silk, Tuscan leather, specialist technical fabric): supplier holds real leverage.

A worked example: where the margin goes

Take a mid-market woven cotton shirt retailing at 60 euros in Europe (illustrative estimate, not a specific company's figures).

• Landed cost to brand (fabric + CMT + trims + freight + duty): roughly 12 to 15 euros
• Of that, the cut-and-sew factory might keep 2 to 4 euros; its own profit margin on that is thin, often single-digit percent.
• The mill supplying the fabric might capture 4 to 6 euros of the cost.
• The brand and retailer together hold the rest of the 60 euros to cover design, marketing, store rent, markdowns, and profit.

Simple calculation of the factory's slice:

The factory touches the physical product most, yet captures the least. That mismatch is the whole story of upstream power: doing the work is not the same as holding the leverage.

(These are rough, widely cited industry estimates for illustration. Actual splits vary hugely by category, brand positioningbrand positioningThe mental space you want your brand to occupy in your target customer's mind relative to alternatives.Voir la définition complète →, and season.)

How Zara neutralizes upstream power

Inditex (Zara's parent) is the textbook case of a brand refusing to be held hostage upstream.

Partial vertical integration. Zara keeps a large share of production close to home (Spain, Portugal, Morocco, Turkey) and owns or tightly controls fabric-cutting, dyeing, and finishing capacity. It buys undyed "greige" fabric in bulk and dyes it late, based on real demand. Controlling the dyeing step means Zara, not a supplier, decides colors at the last minute.

Speed as leverage. Because Zara can design, produce, and ship a new style in a few weeks (versus months for traditional brands), it does not depend on any single supplier's long-lead commitment. Short runs, frequent reorders. This keeps every supplier replaceable and hungry.

Proximity over pure cost. Zara deliberately accepts higher unit labor costs in nearby factories to gain flexibility and control. Rivals chasing the lowest CMT price in distant Asia gave suppliers more leverage and gave themselves slower reaction times.

The result: Inditex protects its margins by making sure no upstream player can dictate price, color, or timing.

Where the balance is shifting in 2026

Three forces are changing who holds power upstream.

Regulation is now a supplier-power multiplier. New rules force brands to know and prove what happens upstream, which raises switching costs and rewards suppliers who are already compliant.

• The EU Corporate Sustainability Due Diligence Directive (CSDDD), adopted in 2024, requires large companies to identify and address human rights and environmental harms in their supply chains.
• The EU Ecodesign for Sustainable Products Regulation (ESPR) introduces the Digital Product Passport (DPP), a data record tracing a product's materials and origin, rolling out for textiles over the coming years.
• The US Uyghur Forced Labor Prevention Act (UFLPA), enforced by US Customs and Border Protection, presumes goods linked to the Xinjiang region are made with forced labor and blocks their import unless proven otherwise.

Effect: a supplier that is already traceable and audited becomes more valuable and harder to swap out. Compliance capability is a new form of leverage.

Raw material volatility. Cotton and synthetic fiber prices swing with weather, energy costs, and geopolitics. When input prices spike, integrated players who locked in capacity or materials early gain an edge over brands exposed to the spot market.

Nearshoring. Rising Asian wages, freight shocks (recall the pandemic and Red Sea shipping disruptions), and speed demands are pushing more Western brands toward Turkey, Morocco, Mexico, and Eastern Europe. This partly copies the Zara playbook and slightly weakens far-Asia factory leverage for fast fashion.

The strategic lesson for any brand

Ask two questions about every input:

1. Is it differentiating or commodity? If differentiating (a signature fabric), expect to share margin with the supplier or integrate to own the capability.

2. How fast can I switch? The longer the switch, the more power sits upstream, and the more you should either dual-source or bring it in-house.

Vertical integration is not free. It ties up capital and reduces flexibility if demand drops. Zara accepts that cost because control and speed protect its margins. A small luxury house may instead accept high supplier power and simply build a long-term partnership with its Como mill, because the fabric *is* the product.

Key Takeaways

• Upstream power is uneven. Commodity inputs leave suppliers weak and squeezed; scarce, non-substitutable know-how (Como silk, Tuscan leather, technical fabric) gives suppliers real pricing leverage.
• Doing the work is not the same as holding the leverage. The cut-and-sew factory touches the product most but often captures the smallest slice of retail price (single-digit percent in the illustrative shirt example).
• Zara's model neutralizes supplier power through partial vertical integration, late-stage dyeing, proximity sourcing, and speed, keeping every supplier replaceable.
• Regulation (CSDDD, ESPR/DPP, UFLPA) is reshaping power by making traceable, compliant suppliers more valuable and harder to swap.
• Two questions decide your strategy: is the input differentiating, and how fast can you switch? The answers tell you whether to integrate, dual-source, or partner.