How much of a company’s carbon footprint is scope 3?

Less than 1 minutemin

31 May 2026

Ask most sustainability managers where the bulk of their company’s emissions come from, and the answer is almost never their own operations. The real weight sits further out in the value chain, in suppliers, logistics, customer use, and end-of-life disposal. That’s the world of scope 3 emissions, and for most businesses, it’s where the carbon footprint story actually gets told.

Understanding the full breakdown of a company’s scope 1, 2, and 3 emissions is no longer optional. Frameworks like the CSRD and CDP are pushing organizations to account for emissions well beyond their factory floors and office buildings. So just how much of a company’s carbon footprint is scope 3, and what does that mean in practice?

Scope 3 typically makes up 70–90% of total emissions

For most companies, scope 3 emissions represent the overwhelming majority of their total carbon footprint. Across most industries, the figure sits somewhere between 70% and 90% of all greenhouse gas emissions. In some sectors, particularly consumer goods, financial services, and food and agriculture, that share can be even higher.

To put it in context: scope 1 covers direct emissions from sources a company owns or controls, like combustion in company-owned boilers or vehicles. Scope 2 covers indirect emissions from purchased energy, mainly electricity and heat. Both are significant, but they’re also relatively contained. Scope 3 is everything else across the entire value chain, from raw material extraction all the way through to how customers eventually dispose of a product. That’s a vast territory, which is exactly why it dominates the carbon footprint breakdown for most organizations.

Which scope 3 categories carry the most weight

The GHG Protocol divides scope 3 into 15 categories, split between upstream (what happens before a product reaches you) and downstream (what happens after it leaves). Not all categories are equally significant, and the heaviest hitters tend to vary by industry.

Purchased goods and services: For most companies, this is the single largest source of supply chain emissions. Every product or service you buy carries the carbon cost of producing it, and those costs add up fast across complex supply chains.
Use of sold products: Particularly relevant for energy-using products like electronics, appliances, or vehicles. The emissions generated when customers actually use the product can dwarf anything that happened during manufacturing.
Business travel and employee commuting: Often underestimated, these categories can be substantial for service-based companies with large workforces or frequent travel patterns.
Capital goods: The emissions embedded in buildings, machinery, and infrastructure a company purchases are counted here and can be significant for capital-intensive industries.
End-of-life treatment of sold products: How products are disposed of, whether through landfill, incineration, or recycling, contributes to the downstream portion of a company’s scope 3 footprint.

What’s striking is how different the picture looks depending on the sector. A financial institution’s biggest scope 3 source is likely its investment portfolio (financed emissions), while a food company will point to agriculture and land use. There’s no universal answer, which is exactly why a blanket approach to scope 3 reduction rarely works. The categories that matter most to your business depend entirely on your value chain, and understanding that is the first step toward doing something meaningful about it.

Why scope 3 is so hard to measure accurately

If scope 3 emissions are so significant, why don’t more companies have a clear picture of them? The honest answer is that measuring them accurately is genuinely difficult, and the challenges are structural, not just technical.

The core problem is data. Unlike scope 1 and 2, where a company controls the sources and can measure them directly, scope 3 requires data from hundreds or thousands of external parties. Suppliers, logistics providers, and customers all hold pieces of the puzzle, and many of them don’t track or report emissions at all. Companies often end up relying on industry-average emission factors rather than actual supplier data, which introduces significant uncertainty into the final numbers.

There’s also the question of boundaries and methodology. The GHG Protocol provides a framework, but companies have discretion in how they apply it, which categories they prioritize, and what assumptions they make. This can make it difficult to compare scope 3 figures across companies, even within the same industry. Add to that the sheer complexity of modern global supply chains, and it becomes clear why scope 3 reporting remains inconsistent even among companies with strong sustainability commitments.

How companies are reducing their scope 3 footprint

Measuring scope 3 is one challenge. Doing something about it is another. The good news is that companies are finding practical ways to move the needle, even without perfect data.

Supplier engagement is probably the most direct route. Companies that set clear expectations for their suppliers, share tools and resources, and build emissions performance into procurement decisions can drive real change upstream. Some organizations are using their purchasing power to incentivize lower-carbon alternatives, while others are investing in supplier capacity building so smaller vendors can actually measure and reduce their footprint.

Product design is another powerful lever. Rethinking materials, extending product lifespans, and designing for disassembly can reduce both the upstream emissions embedded in production and the downstream emissions tied to end-of-life disposal. For companies with energy-using products, improving efficiency is often the single highest-impact action available.

Science-based targets, developed through the SBTi framework, have also become an important driver. Setting targets that cover scope 3 creates internal accountability and gives companies a structured path to reduction rather than vague ambitions. Many companies find that committing to a target is what finally forces them to take scope 3 seriously as a business priority rather than a reporting exercise.

When to bring in a sustainability expert for scope 3

Scope 3 work has a way of quickly outgrowing what an internal team can handle alone. The measurement methodology is technical, the data gaps are real, and the reduction strategies require deep knowledge of specific value chains. That’s when specialist support becomes genuinely valuable.

The type of expert you need depends on where you are in the process. If you’re starting from scratch with a scope 3 inventory, a specialist in greenhouse gas accounting or LCA (life cycle assessment) can help you build a methodology that holds up to scrutiny. If you’re trying to align your targets with a framework like SBTi, you’ll want someone who knows that process inside out. And if you’re reporting under CSRD or disclosing through CDP, a sustainability reporting expert who understands those specific requirements will save you a lot of pain.

The point is that scope 3 isn’t a one-size-fits-all problem, and neither is the expertise needed to tackle it. A generalist can help with the big picture, but the more specific your challenge, the more valuable a specialist becomes. Companies that try to manage complex scope 3 programs with generalist support often find themselves redoing work or missing key nuances that matter for compliance or credibility.

Ready to tackle your scope 3 emissions?

Scope 3 is where most of the carbon footprint lives, and for many organizations, it’s also where the biggest reduction opportunities are hiding. Getting a handle on it takes the right expertise, and that’s something we can help with at Dazzle.

Our network of pre-screened sustainability freelancers includes specialists in scope 3 accounting, LCA, SBTi target-setting, CSRD reporting, and much more. Whether you need focused support for a specific project or an interim expert to lead a broader program, we can match you with the right person for your exact challenge. You can be working with a specialist within 48 hours, without the overhead or delays of a traditional consultancy.

If scope 3 is on your agenda for 2026, reach out to our team and let’s find the right expert for you.

If you’re interested in learning more, contact our team of experts today.