Carbon Neutrality in Retail: Why Overproduction Is the Lever Sustainability Plans Skip

By Elie Dufeu, CTO & Co-Founder, Metreecs. Published 1 July 2026.

Carbon neutrality in retail means a company's total greenhouse gas emissions are balanced by an equal amount removed or avoided elsewhere, through real operational cuts or, for whatever remains, verified offset projects. Starting 27 September 2026, EU rules ban retailers from making that claim using offsets alone. That single change forces a harder question: where do retail emissions actually come from, and can you cut them at the source instead of paying someone else to?

If you run supply chain, planning, or sustainability for a retail brand, you already know the scrutiny on climate claims has changed. Consumers ask sharper questions. Regulators ask sharper ones still. This article breaks down where retail emissions really originate, why overproduction is the biggest lever most sustainability plans skip, and what changes when demand forecasting gets treated as a climate tool instead of just a merchandising one.

Key Takeaways

• Fashion's global emissions rose 7.5% in 2023, the first increase since the Apparel Impact Institute began tracking the sector in 2019, driven largely by overproduction and virgin polyester use
• McKinsey estimates most fashion brands could cut greenhouse gas emissions by more than 60% for 1-2% of revenue, based on an analysis of 30 major brands with public 2030 decarbonization targets
• The EU's Empowering Consumers for the Green Transition Directive bans offset-only "carbon neutral" claims from 27 September 2026, requiring real Scope 1, 2, and 3 reductions first
• Overproduction is a demand planning failure before it is a sustainability one: every unit made in excess of demand carries its full carbon cost whether it sells, gets marked down, or gets destroyed
• Reducing days inventory outstanding is both a working capital metric and, indirectly, an emissions metric, since it tracks how much manufactured stock is sitting unsold at any given time

What does carbon neutrality mean for a retail brand?

Carbon neutrality is the point at which a company's measured emissions are matched by emissions it has removed, avoided, or offset. For a retailer, that calculation spans three layers: Scope 1 (fuel and refrigerants it burns directly), Scope 2 (the electricity it buys), and Scope 3 (everything upstream and downstream, from raw materials to a customer's tumble dryer).

Scope 3 is where retail gets complicated. Scope 3 emissions typically account for the large majority of a company's total footprint, and can run even higher for fashion and home goods retailers specifically, given how much of the footprint sits in materials and manufacturing rather than stores or delivery vans. A carbon neutrality plan that only touches store lighting and delivery vehicles is addressing a small fraction of the problem.

That is why the industry conversation is shifting. Retailers with credible sustainability strategy now start further upstream, at the point where a product is designed, ordered, and produced, long before it reaches a shelf.

Curious how much of your Scope 3 footprint sits in unsold stock? See how Metreecs' AI demand planning models that upstream volume before you commit to a purchase order.

Why overproduction is retail's biggest hidden emissions source

Overproduction sits quietly inside almost every retail emissions report, disguised as a merchandising problem rather than a climate one. Fashion alone accounts for roughly 10% of global carbon emissions annually (McKinsey, Fashion on Climate), and the sector's total emissions rose 7.5% in 2023, the first year-on-year increase since the Apparel Impact Institute began tracking the industry in 2019. The report ties the increase directly to higher production volumes, especially from ultra-fast fashion, and a growing reliance on virgin polyester, which now accounts for more than half of global fiber production.

Every unit made in excess of demand carries a full carbon cost, the raw material extraction, the dyeing, the shipping, the packaging, before a single customer sees it. If it doesn't sell, it gets marked down, donated, or destroyed. None of those outcomes are carbon neutral. All of them were avoidable at the forecasting stage.

A pattern that recurs across apparel planning teams: a spring buy gets planned the way it always has, last year's sell-through plus a flat growth assumption, adjusted for gut feel about a new print. A meaningful share of that buy ends the season unsold across regional warehouses, with a portion cleared through a discount jobber at a fraction of cost and the rest written off at season's end. The team did not order carelessly. It used the same tools most planning teams still rely on, and those tools have no way to flag overproduction before it becomes emissions and markdown cost at the same time.

Want to see where your own overproduction is hiding? Explore Metreecs' AI-driven inventory optimization and find out how much of your current stock was never going to sell at full price.

How the EU's 2026 rules change what "carbon neutral" can mean

Retailers have leaned on offsets for years because they are fast to buy and easy to put on a label. That option is narrowing. The EU's Empowering Consumers for the Green Transition Directive, which member states had to transpose by 27 March 2026 and which applies from 27 September 2026 with no transition period, prohibits claiming a product has a neutral, reduced, or positive climate impact when that claim rests on offsetting outside the product's value chain rather than genuine reduction.

In practice, a retailer can still use offsets, but only for residual emissions left over after real reductions in its own operations and supply chain. A brand that hasn't touched its production volumes, its logistics network, or its unsold-stock rate cannot credibly claim carbon neutrality just because it bought credits for a reforestation project. Regulators will ask what changed operationally first.

This is not a reason to abandon sustainability messaging. It's a reason to make sure the reduction happened before the claim did. The European Commission's guidance on green claims is explicit that unsubstantiated environmental claims, including carbon neutrality based on offsets alone, fall under existing consumer protection rules.

The lever that actually moves the number: demand forecasting

If overproduction drives a meaningful share of the emissions and offsets can no longer paper over it, the operational fix is forecasting accuracy. McKinsey's analysis of the fashion sector found that most brands with public decarbonization targets could reduce greenhouse gas emissions by more than 60% for an investment of roughly 1-2% of revenue, with the bulk of that abatement potential sitting in upstream, supply-side changes rather than store operations. Aligning production more closely with actual demand, so fewer units are made against a forecast padded for safety, is one of the concrete ways brands can capture part of that potential. AI-driven demand forecasting is the mechanism that makes that alignment possible at scale.

Product-level forecasting, updated daily rather than seasonally, changes the buying conversation from "how much should we order to be safe" to "how much will actually sell, by store, by size, by week." Retailers that adopt this approach consistently report fewer stockouts alongside lower average inventory on hand, which means less capital tied up and less product destined for a landfill or a markdown rack.

See the forecast before you place the order. Book a demo of Metreecs' AI demand planning and model what accurate, product-level forecasting would have changed about your last buying cycle.

What carbon-neutral retail actually looks like in practice

Retailers making genuine progress on emissions share a common pattern: they treat overstock reduction as a climate metric, not just a finance one. Four changes show up consistently in the brands doing this well.

1. Forecast at the product and location level, not the category level. A category forecast for "outerwear" hides which specific jackets, in which specific stores, will actually sell. That gap is where overproduction starts.
2. Track days of inventory on hand as a sustainability KPI. Every day of excess stock represents capital and carbon sitting idle.
3. Rebalance stock between stores before ordering more. Moving inventory from a slow location to a fast one avoids both a stockout and a duplicate production run. Our guide on managing networked inventory and the KPIs that matter walks through how to set this up.
4. Treat markdown volume as an emissions signal. If a category consistently ends the season deeply discounted, the forecast for that category was wrong before a single unit was cut. Our breakdown of overstock in fashion retail covers how to trace markdown back to its forecasting root cause.

None of this replaces a genuine energy transition or supplier decarbonization program. It does address the largest, least examined piece of most retailers' Scope 3 footprint: the units that never should have been made.

DIO as a climate metric, not just a finance one

Reducing days inventory outstanding is rarely framed as a sustainability initiative. It is usually framed as a working capital fix. But the emissions outcome comes along with it: every day of inventory reduction has a mirror effect upstream, fewer defensive reorders, fewer emergency air shipments to cover a stockout, less product manufactured to sit as a buffer against forecast error.

A finance team sees DIO and thinks cash flow. A sustainability team should see the same number and think emissions avoided.

That overlap matters more now than it did two years ago. Boards asking about climate targets and boards asking about working capital are increasingly asking the same question in different language. A platform that improves one number tends to improve the other.

FAQ

What is carbon neutrality in retail?
Carbon neutrality in retail means a company's measured emissions, across its own operations, purchased energy, and supply chain, are matched by an equal amount removed, avoided, or offset. For most retailers, supply chain emissions (Scope 3) make up the vast majority of that total, so the label is only credible once those upstream emissions have actually been reduced.

What's the difference between carbon neutral and net zero for a retail brand?
Carbon neutral typically refers only to carbon dioxide and allows a heavier reliance on offsets to reach balance. Net zero covers all greenhouse gases and generally requires deeper operational reduction before any offsetting, with offsets reserved for a small residual amount. Retailers moving toward net zero targets tend to invest more in forecasting and production discipline earlier.

Can retailers still claim "carbon neutral" after the EU's 2026 rules take effect?
Yes, but only if the claim is backed by real reductions in Scope 1, 2, and 3 emissions, with offsets used solely for what's left over. From 27 September 2026, a claim based on offsetting alone, without documented operational change, is not permitted under the EU's Empowering Consumers for the Green Transition Directive.

How much of retail's carbon footprint comes from unsold inventory?
There's no single universal figure, because it varies by category and disclosure method, but overproduction is consistently cited as a primary driver of the fashion industry's 2023 emissions increase. Every unsold unit still carries the full production and shipping emissions cost, whether it's sold at full price, marked down, or discarded.

Does better demand forecasting actually reduce carbon emissions?
Indirectly, yes, and the effect is measurable. Fewer units ordered in excess of demand means fewer units manufactured, shipped, warehoused, and eventually destroyed or marked down. McKinsey ties supply-demand alignment and other upstream measures to a potential 60%+ reduction in fashion sector emissions, achievable for a relatively small share of revenue for the brands it analyzed.

How long does it take to see an emissions impact from reducing overstock?
Operational change tends to show up faster than most sustainability initiatives, since the reduction happens at the ordering stage. Because it works upstream, the emissions benefit compounds every season a brand keeps forecasting accurately.

Where to start

Carbon neutrality in retail isn't won with a bigger offset budget. It's won by not manufacturing the units that were never going to sell in the first place, and by proving that with a number regulators and customers can both check. Start with the metric that ties directly to both cash and carbon: days of inventory on hand.

If overproduction, markdowns, or stockouts are eating into your margin and your sustainability story at the same time, the fix is the same forecast. See how Metreecs handles demand forecasting and inventory optimization for retail teams and find out what your DIO number could look like in six months.

Sources

• Empowering Consumers for the Green Transition Directive - Cooley
• Fashion Industry Sees 7% Emissions Spike, Driven by Overproduction and Polyester Use - Apparel Impact Institute
• Sustainable style: How fashion can afford and accelerate decarbonization - McKinsey
• How the fashion industry can reduce its carbon footprint - McKinsey, Fashion on Climate