Scope 3 emissions are widely known as the hardest part of carbon accounting to get right. They cover everything outside your direct operations, which means they can represent the vast majority of a company’s total carbon footprint. But within scope 3, there’s a further distinction that trips up a lot of sustainability teams: the split between upstream and downstream emissions. Getting this right isn’t just a reporting technicality. It shapes how you prioritize action, where you focus supplier engagement, and how credible your GHG Protocol disclosures actually are.
If you’ve ever stared at a scope 3 inventory and wondered why some categories feel so different from others, the upstream/downstream framework is the key to making sense of it all.
The 15 categories split between upstream and downstream
The GHG Protocol organizes scope 3 emissions into 15 distinct categories, split into two groups based on where in the value chain the emissions occur relative to your company.
The upstream categories cover activities that happen before your product or service reaches you:
- Category 1: Purchased goods and services — The emissions embedded in everything you buy to run your business, from raw materials to office supplies.
- Category 2: Capital goods — Emissions from producing the equipment, machinery, or infrastructure your company acquires.
- Category 3: Fuel and energy-related activities — Upstream emissions from extracting and processing the fuels and energy you consume, not counted in scope 1 or 2.
- Category 4: Upstream transportation and distribution — Getting goods to you, including freight from suppliers to your facilities.
- Category 5: Waste generated in operations — The emissions tied to processing and disposing of waste your operations produce.
- Category 6: Business travel — Flights, trains, hotels, and other travel your employees take for work.
- Category 7: Employee commuting — The daily travel your workforce makes between home and the office.
- Category 8: Upstream leased assets — Emissions from assets you lease that aren’t already in your scope 1 or 2 reporting.
The downstream categories cover what happens after your product or service leaves your hands:
- Category 9: Downstream transportation and distribution — Moving your products to customers, retailers, or end users.
- Category 10: Processing of sold products — Relevant when your product is an intermediate good that another company processes further.
- Category 11: Use of sold products — Often the biggest category for energy-intensive products, covering emissions during customer use.
- Category 12: End-of-life treatment of sold products — What happens when customers dispose of your product.
- Category 13: Downstream leased assets — Emissions from assets you own but lease to others.
- Category 14: Franchises — For franchisors, the scope 1 and 2 emissions of franchisee operations.
- Category 15: Investments — Emissions associated with the capital you invest in other companies or projects.
Together, these 15 categories give a comprehensive picture of supply chain emissions across the full value chain. Not every category will be relevant to every organization, but understanding the full map helps you identify which ones actually matter for your business model.
How upstream emissions differ from downstream in practice
The conceptual split is straightforward, but the practical difference between upstream and downstream emissions is significant. Upstream emissions are largely driven by your purchasing decisions. Downstream emissions are driven by product design choices and how customers use what you sell.
For a company that manufactures physical goods, upstream emissions tend to concentrate in purchased goods and services (Category 1), which often dominates the entire scope 3 inventory. The emissions are embedded in the materials and components you source, which means reducing them requires supplier engagement, procurement policy changes, or switching to lower-carbon inputs. You have indirect influence through your supply chain relationships, but you don’t control those emissions directly.
Downstream emissions work differently. If you make a product that consumes energy during use, such as a vehicle, an appliance, or industrial equipment, then Category 11 (use of sold products) can dwarf everything else in your footprint. Here, the lever for reduction isn’t your supply chain. It’s your product design team. Building a more energy-efficient product is the only way to meaningfully move that number.
This distinction also affects data collection. Upstream emissions data often comes from supplier questionnaires, spend-based estimates, or life cycle assessment databases. Downstream data frequently relies on assumptions about customer behavior, product lifespans, and usage patterns, which introduces more uncertainty. Both present real challenges for carbon accounting, but they require entirely different approaches to tackle well.
Why the upstream/downstream split shapes your reduction strategy
Understanding where your emissions sit isn’t just an accounting exercise. It directly determines which reduction strategies are worth pursuing and which stakeholders you need to bring on board.
Companies with heavy upstream footprints need to focus on their supply chains. That means setting supplier emissions targets, prioritizing lower-carbon sourcing, and potentially supporting suppliers in their own decarbonization efforts. Frameworks like SBTi (Science Based Targets initiative) have developed specific guidance for engaging suppliers as part of a credible scope 3 reduction pathway.
Companies with heavy downstream footprints face a different challenge. Reducing emissions in Category 11 requires product innovation, not just procurement decisions. It might mean redesigning a product to use less energy, extending product lifespans to reduce end-of-life waste, or helping customers use products more efficiently. For some industries, this is where the majority of decarbonization potential actually lies.
There’s also a strategic communication angle. When companies report under CSRD or disclose through CDP, the upstream/downstream breakdown signals to stakeholders where a company’s material emissions risks are concentrated and what kind of action plan is realistic. A company claiming ambitious scope 3 targets while ignoring its dominant category, whether upstream or downstream, will face scrutiny. Getting the split right gives your strategy credibility.
Common mistakes in classifying scope 3 activities
Even experienced sustainability teams make classification errors, and some categories are genuinely tricky to assign correctly. A few patterns come up repeatedly.
- Confusing Category 3 with scope 1 and 2 — Fuel and energy-related activities (Category 3) cover the upstream extraction and processing of fuels, not the combustion or consumption itself. That part belongs in scope 1 or 2. Mixing these up leads to double-counting or gaps.
- Misplacing leased assets — Whether a leased asset falls under Category 8 (upstream) or Category 13 (downstream) depends on whether you’re the lessee or the lessor. Getting this wrong is a surprisingly common error, especially in companies with complex asset structures.
- Treating Category 11 as optional for product companies — Some teams deprioritize use-of-sold-products because the data is harder to collect. But for many manufacturers, this is the single largest emissions source. Skipping it because it’s inconvenient undermines the entire inventory.
- Forgetting employee commuting — Category 7 is often overlooked, particularly by companies that focus heavily on their supply chain. It’s not always material, but it should be assessed rather than assumed away.
- Applying spend-based estimates too broadly — Spend-based methods are a useful starting point for Category 1, but relying on them across the board produces a rough picture at best. Where categories are material, more specific activity-based or supplier-specific data gives a more accurate result.
What ties these mistakes together is usually a combination of data pressure and unfamiliarity with the GHG Protocol’s category definitions. Teams rushing to complete a scope 3 inventory for the first time often make judgment calls that seem reasonable but don’t hold up under scrutiny. Building in a review step, or working with someone who knows these categories deeply, catches most of these issues before they become reporting problems.
Getting expert support for scope 3 reporting
Scope 3 reporting is one of the most technically demanding areas in sustainability. The 15 categories span multiple business functions, require different data collection approaches, and involve judgment calls that can significantly affect your reported footprint. It’s also an area where the regulatory stakes are rising, particularly under CSRD, which requires detailed value chain emissions disclosure for many European companies.
For many organizations, the gap isn’t motivation. It’s specialized knowledge. A scope 3 emissions reduction consultant works differently from an LCA specialist or a CSRD reporting expert. Each brings a distinct skill set, and matching the right expertise to your specific challenge matters more than finding a generalist who covers everything loosely.
Traditional consultancies can provide this kind of support, but they tend to come with higher costs and longer lead times due to their internal processes. For organizations that need focused expertise on a specific project or an interim resource to build out their scope 3 methodology, a more flexible approach often makes more sense.
Ready to get your scope 3 reporting right?
Scope 3 is complex, but it doesn’t have to be overwhelming. With the right expertise alongside you, the upstream/downstream framework becomes a genuinely useful tool for building a credible, actionable emissions strategy rather than just a compliance checkbox.
At Dazzle, we match organizations with pre-screened sustainability freelancers who specialize in exactly the kind of work you need, whether that’s scope 3 methodology, carbon accounting, or CSRD-aligned reporting. Our network of 150+ experts is available on a project or interim basis, and we can connect you with the right person within 48 hours. If you’re working through your scope 3 inventory and want experienced support without the overhead of a large consultancy, reach out to our team and we’ll find the right fit for your challenge.
If you’re interested in learning more, contact our team of experts today.
