If you’ve ever dug into a company’s scope 3 emissions inventory, you’ve probably noticed that one category has a habit of dwarfing all the others. Category 11 scope 3 emissions, officially titled “use of sold products,” captures the greenhouse gas emissions that occur when customers actually use what a company sells. For many businesses, especially those in energy, electronics, or consumer goods, this is where the real climate impact lies.
Understanding scope 3 category 11 isn’t just a reporting exercise. It’s a window into where a product’s lifetime emissions actually come from, and it often points directly toward the most meaningful opportunities for reduction. Here’s what you need to know.
What counts as a category 11 emission source
Category 11 covers the indirect emissions generated during the use phase of a product, after it leaves the company and reaches the end user. These are emissions that your organization doesn’t directly control, but that exist because of the product you designed and sold.
There are two main types of use-phase emissions under this category. The first is direct use-phase emissions, which come from products that combust fuel or release greenhouse gases during operation. Think of a gas boiler, a petrol-powered vehicle, or an aerosol containing refrigerants. The second type is indirect use-phase emissions, which come from products that consume energy during use. A washing machine, a laptop, or an industrial motor all fall into this category. Their emissions depend on the energy source powering them, but the GHG Protocol still attributes those emissions to the selling company’s scope 3 inventory.
Some products don’t generate any use-phase emissions at all, like a wooden chair or a glass bottle, and those are simply excluded from category 11. The key question is always: does this product consume energy or release greenhouse gases while being used?
How category 11 fits into the broader scope 3 framework
Scope 3 emissions cover all indirect greenhouse gas emissions in a company’s value chain, both upstream and downstream. The GHG Protocol organizes these into 15 categories, and category 11 sits firmly on the downstream side, meaning it relates to what happens after a product is sold rather than how it was made.
This distinction matters for reporting. Upstream categories like purchased goods and services or business travel are often easier to influence through procurement decisions and operational changes. Downstream categories, including use of sold products, require a fundamentally different approach because the emissions happen outside the company’s direct operations.
For organizations working toward science-based targets through SBTi, or disclosing through CDP, category 11 is frequently one of the categories that gets the most scrutiny. That’s because it can represent a significant portion of a company’s total climate impact, and regulators and investors increasingly want to see credible plans to address it. Under the CSRD framework, companies are also expected to report on material scope 3 categories, and for many sectors, category 11 is clearly material.
Calculating category 11 emissions accurately
Getting the numbers right for use of sold products emissions is more complex than most other scope 3 categories. The calculation depends heavily on product type, expected lifetime, usage patterns, and the energy mix of the markets where products are sold.
The GHG Protocol outlines several approaches depending on what data is available:
- Fuel-based method: Used for products that directly combust fuel. You estimate the total fuel consumed across all units sold during their expected lifetime and apply the relevant emission factors. This works well for products like gas appliances or combustion engines.
- Electricity-based method: Used for energy-consuming products. You estimate lifetime electricity consumption per unit, multiply by units sold, and apply grid emission factors for the relevant markets. The challenge here is that grid emission factors vary significantly by country and change over time.
- Direct emissions method: Used for products that release greenhouse gases directly, such as refrigerants or industrial gases. You estimate the total emissions released during normal use and end-of-life.
All three methods require solid assumptions about product lifetimes and usage intensity, and those assumptions can shift the final number considerably. This is why life cycle assessment specialists are often brought in specifically for category 11 work. A well-designed LCA gives you defensible, product-specific data rather than generic averages, which becomes increasingly important as reporting standards tighten.
Why category 11 is often the largest scope 3 contributor
For many companies, use of sold products emissions don’t just appear in the top few categories. They dominate the entire scope 3 inventory. The reason is straightforward: a product’s use phase can span years or even decades, and if it consumes energy or burns fuel throughout that time, those emissions accumulate fast.
Consider a company that sells gas heating systems. Each unit might operate for 15 to 20 years, burning fuel every single day. Multiply that across hundreds of thousands of units, and the cumulative use-phase emissions dwarf anything happening in the factory or the supply chain. The same logic applies to vehicle manufacturers, appliance brands, industrial equipment suppliers, and any company selling energy-intensive products at scale.
This is also why category 11 can be uncomfortable to report. It forces companies to confront the fact that their biggest climate impact isn’t in their own operations. It’s in the hands of their customers. That’s a harder conversation to have, but it’s also where the most significant decarbonization potential often sits.
Reducing category 11 emissions through product design
The most direct way to reduce use of sold products emissions is to change what you sell. Product design decisions made before a product ever reaches a customer determine most of its lifetime emissions, which means this is where the leverage is greatest.
Some of the most effective approaches include:
- Improving energy efficiency: Designing products that consume less energy per unit of output reduces emissions across every unit sold. Even incremental efficiency gains, when multiplied across large product volumes and long use lifetimes, translate into substantial emissions reductions.
- Electrifying fuel-based products: Switching from combustion-based to electric products removes direct use-phase emissions entirely, shifting the impact to the electricity grid. As grids decarbonize, the emissions associated with electric products automatically decrease over time.
- Extending product lifetimes: A product that lasts longer and performs efficiently throughout its life produces fewer emissions per year of service. Durability and repairability are underrated tools in a scope 3 reduction strategy.
- Enabling low-carbon use: Some companies go further by designing products that can be powered by renewable energy sources, or by offering programs that help customers access cleaner energy options alongside the product itself.
What connects all of these strategies is the recognition that scope 3 category 11 reductions require cross-functional effort. It’s not just a sustainability reporting task. It involves R&D, product management, engineering, and commercial teams working toward a shared goal. The sustainability function sets the direction and tracks progress, but the actual emissions reductions happen in the product roadmap.
Getting expert support for scope 3 reporting
Tackling category 11 well requires a specific combination of skills that isn’t always easy to find in one place. Accurately quantifying use-phase emissions might call for an LCA specialist. Building a credible reduction strategy tied to SBTi targets might require a scope 3 emissions reduction consultant. And translating all of it into compliant disclosures for CSRD or CDP might require a sustainability reporting expert. These are genuinely different disciplines, and the right support depends entirely on where you are in the process.
Traditional consultancies can provide this kind of help, but they often come with significant costs and lengthy onboarding processes before work actually begins. For companies that need to move quickly, or that want flexible support for a specific project rather than a long-term retainer, that model doesn’t always fit.
Ready to move forward on scope 3?
Whether you’re just getting started with scope 3 reporting or you’re deep in the weeds of category 11 calculations, having the right expert in your corner makes a real difference. At Dazzle, we match organizations with pre-screened sustainability freelancers who specialize in exactly the kind of work you need, whether that’s LCA analysis, scope 3 strategy, or CSRD-aligned reporting. You can start working with the right expert within 48 hours, with no lengthy procurement process standing in the way.
If you’d like to find the right specialist for your scope 3 challenge, reach out to our team, and we’ll match you with someone who fits your project perfectly.
If you’re interested in learning more, contact our team of experts today.
