CSDDD for Apparel and Footwear: Building a Tier-1-First Due Diligence Program for Textile Supply Chains

Fashion supply chains are some of the deepest and most opaque of any consumer industry - fiber growers, spinners, weavers, dye houses, cut-and-sew factories, and brands, often spread across five or six countries before a garment ever reaches a store. It would be reasonable to assume the CSDDD asks apparel and footwear companies to map and audit all of it at once. It doesn't. The directive is staged, and it starts at tier 1.

Who's actually in scope

CSDDD's obligations apply directly only to companies with more than 5,000 employees and over €1.5 billion in net annual turnover. For non-EU headquartered brands, that €1.5 billion threshold is measured against EU-generated turnover specifically, not global revenue (Carbonfact). That excludes the large majority of fashion companies by headcount - the textile industry counts roughly 160,000 companies in the EU alone, and the overwhelming majority are small and mid-sized manufacturers who will never file a CSDDD report themselves (Greenstitch).

But "not directly in scope" is not the same as "not affected." Every mill, dye house, and cut-and-sew factory that supplies an in-scope brand will feel this indirectly, through the due diligence questionnaires, contract clauses, and monitoring requirements their customers now have to run.

The tier-1-first scoping model

The mechanism that makes CSDDD workable for an industry this deep is sequencing. Due diligence begins with an initial scoping assessment at the tier-1 partner level - the direct suppliers a brand contracts with directly. Only where that initial assessment turns up credible evidence of risk does the obligation extend further upstream, into the raw material and sub-supplier tiers most brands have historically had little to no visibility into (Carbonfact).

That's a meaningfully different exercise than trying to map an entire supply chain in one pass. It rewards brands that already know their tier-1 partners well and have contractual leverage over them, and it means the first real compliance milestone is a solid, current supplier list with real ownership and location data - not a finished multi-tier risk atlas.

Where the real environmental risk sits

For apparel and footwear specifically, the highest-risk environmental processes aren't spinning or weaving - they're wet processing. Brands are expected to map their mills and factories with particular attention to "processes with high environmental risk, such as dyeing, finishing, and washing," and to assess:

• Water use and wastewater discharge, especially in regions with weak environmental oversight
• Chemical management practices in dye houses and finishing plants
• Energy consumption and the electricity sources behind it
• Raw material sourcing practices that affect forests and soil quality upstream

The industry context makes clear why regulators are focused here: textiles account for roughly 10% of global greenhouse gas emissions - about 5 billion tonnes of CO2 annually - from a workforce of some 91 million people worldwide, more than half of them women (Greenstitch).

Building it into the contract, not just the questionnaire

A due diligence finding only matters if it changes what a supplier is contractually required to do. For tier-1 partners, that means embedding a clear code of conduct covering human rights and environmental standards directly into supplier contracts, alongside compliance and monitoring mechanisms rather than one-off audits. Brands are expected to move from general commitments to specific, checkable performance criteria - wastewater treatment standards, chemical use restrictions, or requirements around energy sourcing - written into the commercial relationship itself (Carbonfact).

That shift matters operationally: it moves due diligence out of the sustainability team's spreadsheet and into procurement's contract templates, which is where it actually has teeth.

The reporting rhythm: less frequent than you'd think

One detail that catches compliance teams off guard: in-scope companies report on their due diligence measures far less often than the annual cadence most ESG reporting has trained people to expect - once every four years, rather than annually (Carbonfact). That's good news for reporting workload, but it's a trap if it's read as license to run due diligence itself on a four-year cycle. Risk identification and mitigation are meant to be continuous and risk-based; only the external reporting artifact moves to a longer rhythm. A supplier factory fire or a wage dispute doesn't wait four years, and neither should your monitoring of it.

A practical starting sequence

1. Confirm scope first - both your own status and, if you sit below the threshold, which of your customers are in scope and will be pushing requirements down to you.
2. Build (or clean up) your tier-1 supplier register with verified ownership, location, and facility-level detail. This is the foundation the entire scoping model depends on.
3. Prioritize wet processing facilities - dye houses, finishing plants, laundries - for the first round of environmental risk assessment, given where the directive's own risk focus sits.
4. Move code-of-conduct language from general commitments to specific, auditable contract clauses with your tier-1 partners.
5. Design continuous monitoring separately from the four-year reporting cycle - don't let a long external reporting rhythm slow down internal risk tracking.

Fashion's supply chains won't get shallower or more transparent on their own. CSDDD doesn't ask brands to solve that all at once - it asks them to start where they actually have visibility and leverage, and to build outward from there.