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    Scope 3 Emissions

    Definition

    Other indirect greenhouse-gas emissions across an organisation's upstream and downstream value chain, outside its own operations and purchased energy.

    Editorial definition: The QHSE Standard, updated 3 October 2026 · https://qhsetech.com/glossary/scope-3-emissions

    Scope: Assess relevant categories and disclose the data and estimation methods used.

    Example for your evaluation: Keep supplier activity data distinguishable from estimates and their assumptions.

    Sources checked: . Examples are editorial illustrations.

    How the GHG Protocol defines Scope 3

    The GHG Protocol's Corporate Value Chain (Scope 3) Accounting and Reporting Standard defines Scope 3 as all indirect emissions, not included in Scope 2, that occur in the value chain of the reporting company, both upstream and downstream. Scope 1 covers emissions from operations the company owns or controls, and Scope 2 covers the generation of purchased electricity, steam, heating or cooling that it consumes. The standard divides Scope 3 into 15 categories. Eight are upstream: purchased goods and services, capital goods, fuel- and energy-related activities not in Scope 1 or 2, upstream transportation and distribution, waste generated in operations, business travel, employee commuting and upstream leased assets. Seven are downstream: downstream transportation and distribution, processing of sold products, use of sold products, end-of-life treatment of sold products, downstream leased assets, franchises and investments.

    The standard says companies shall account for all Scope 3 emissions and disclose and justify any exclusions, shall account for each category according to the minimum boundaries it sets, and shall cover the greenhouse gases it lists if they are emitted in the value chain. Biogenic carbon dioxide is reported separately and not included in the scopes. It distinguishes primary data, which comes from specific activities in the company's value chain, such as data provided by suppliers, from secondary data such as industry averages, financial data and proxies. It states that it is intended to enable comparison of one company's emissions over time and is not designed to support comparison between companies on their Scope 3 totals. In the GHG Protocol's overall scheme, reporting Scope 1 and 2 is required and reporting Scope 3 is optional.

    In EU reporting, ESRS E1 as first adopted (Delegated Regulation (EU) 2023/2772) requires disclosure of gross Scope 3 emissions from each significant Scope 3 category, and its application requirements refer to the GHG Protocol Corporate Standard (2004 version) and the Scope 3 Standard (2011 version) for the 15 categories and for screening which are significant. Two delegated acts amending the ESRS were adopted on 3 July 2026, so confirm the version and any phase-in that applies to the reporting period. Whether an organisation must report Scope 3 at all depends on the framework, rule or contract that applies to it, not on the GHG Protocol itself. This page is general information and not advice on a reporting obligation.

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    What a Scope 3 record holds in software

    • A category-by-category screening result: which of the 15 categories are relevant and why, and the reasons for any exclusion.
    • Activity data for each category with its unit and source, marked as primary or secondary.
    • The emission factor used, with its source, version and the greenhouse-warming potentials applied.
    • The calculation method for each category and a note on data quality and known gaps.
    • Supplier-provided data with the supplier, the period, the boundary and the evidence received.
    • The base year, the recalculation policy and a log of recalculations with their reasons.

    Scope 3, Scope 2 and product carbon footprints

    Scope 3 is an organisation-level inventory category, not a product footprint. A product carbon footprint follows one product through its life cycle, while a Scope 3 inventory sums a company's value-chain emissions across categories. Because Scope 3 emissions are by definition the direct emissions of another entity, and sometimes another company's Scope 3, adding up inventories across companies counts some emissions more than once. The GHG Protocol's Scope 3 Standard acknowledges this double counting and asks companies to be transparent about it when claiming reductions.

    A hypothetical example: screening a furniture maker's value chain

    This case is invented to illustrate the record and uses no real data. A furniture maker screens all 15 categories with spend data and rough activity data. The screening suggests that purchased goods and services, upstream transportation and end-of-life treatment of sold products matter most, while business travel and commuting are small. The maker records that it has no franchises and no downstream leased assets, so those are marked not applicable, and writes a short justification for treating investments as immaterial.

    In the next step the maker replaces the spend-based estimate for timber with supplier-specific data from its two largest suppliers, marked as primary, and leaves other inputs as estimates. In the following year the category total falls. The record shows that part of the fall comes from the change of method and not from a real reduction, so the base year is recalculated under the company's stated policy and the report explains the difference. Anyone reading the inventory can see which numbers are measured, which are estimated and why.

    Common misunderstandings about Scope 3

    • Scope 3 is not simply a supplier number. It includes downstream categories such as the use and end-of-life of sold products, and investments, as well as upstream activities.
    • The standard's logic is to account for all Scope 3 emissions and justify exclusions, but whether a public report is required depends on the rule or request that applies.
    • A supplier's figure is not automatically better than an estimate. Check its boundary, period and method before marking it as primary data.
    • One company's total cannot be compared directly with another's. The standard says it is not designed to support comparisons between companies, because methods and company structures differ.
    • A single Scope 3 figure hides the structure. Categories differ widely in data quality and in how much the company can influence them, so show them separately.

    How Scope 3 relates to other glossary terms

    Scope 3 is one part of a greenhouse-gas inventory and one input to wider reporting.

    • GHG Scope 1, 2 and 3: the full structure, with the boundary choices that apply across all three scopes.
    • ESG: the umbrella under which emissions data is requested by customers, lenders and investors.
    • Double materiality: the assessment under the ESRS that helps decide whether Scope 3 matters are material and which categories are significant.
    • CSRD: the EU framework whose standards call for gross Scope 3 emissions from significant categories.

    Records and evidence that usually exist for Scope 3

    • The screening of all 15 categories and the reasons for exclusions.
    • Activity data sources such as purchase ledgers, freight records, travel bookings and sales data.
    • Emission factor tables with their publisher, year and version.
    • Supplier questionnaires, data files and statements, with dates and boundaries.
    • Calculation workbooks or system logs, with review sign-off.
    • The base year, recalculation policy and a record of each recalculation.

    What a software tool needs to capture for Scope 3

    • A category structure that covers all 15 categories, with an exclusion and justification field for each.
    • A marker on every figure for primary or secondary data, and a visible method such as supplier-specific, average-data or spend-based.
    • Emission factors held with source and version, so a change in factor is visible against the period.
    • Supplier data requests with status, evidence and the supplier's stated boundary.
    • Recalculation handling that keeps both values and the reason, with the base-year policy attached.
    • Exports by category that show data quality and not only totals.
    • A way to avoid presenting estimates as measurements in dashboards and reports.

    Catalog profiles documenting Scope 3 accounting

    Each profile documents Scope 3 or value-chain emissions capability in its record. The list does not show the quality of any product's data or methods.

    Same rule for every product: tagged “Carbon Accounting”, “Carbon Management”, “Scope 3” or “Emissions Reporting”, with a sourced Scope 3 or supplier-emissions capability in its record, or one the vendor stated to us, labelled as vendor-stated. Documented and conditional capabilities qualify; check the linked scope before treating a module as included.

    Tekmon pays for a sponsored placement (above); its place in this list follows the same rule as every entry. How lists are ordered

    All 12 matching profiles are shown. Documentation review, not hands-on testing or a claim of compliance.

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    Frequently asked questions

    How many Scope 3 categories are there?

    The GHG Protocol's Scope 3 Standard lists 15: eight upstream and seven downstream. A company screens all of them and discloses and justifies any exclusion.

    Can spend-based estimates be used?

    The standard recognises secondary data such as industry averages and financial data alongside primary data. Keep estimates distinguishable from supplier-specific data and record the methods and assumptions.

    Does every organisation have to report Scope 3?

    Not under the GHG Protocol itself, where reporting Scope 3 is optional. A duty comes from the framework, regulation or contract that applies. ESRS E1 as first adopted calls for gross Scope 3 emissions from significant categories; confirm the version that applies after the 2026 amendments.

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