Statistics & benchmarks · 2026
Carbon accounting & emissions statistics (2026)
A sourced reference of widely-cited carbon accounting, emissions and reporting figures — each attributed to its primary source (GHG Protocol, IPCC, UNEP, IEA, CDP, SBTi, the EU Commission and others). Use these benchmarks to frame your own footprint, and verify each figure against the cited source before republishing. To turn these numbers into your own audited inventory, CarbonTool measures Scope 1, 2 and 3 on one data backbone.
The short answer
Scope 3 emissions typically make up 70–90% of a company's total carbon footprint (CDP), which is why corporate carbon accounting now centres on the value chain rather than direct operations alone. Most corporate reporting is built on the GHG Protocol, the methodology used by the large majority of the world's largest companies, and the EU's CSRD is set to bring sustainability reporting to roughly 50,000 companies (European Commission estimates). Globally, energy-related CO2 emissions reached record highs above 37 gigatonnes in the mid-2020s (IEA), and the buildings sector alone accounts for around 37% of energy-related CO2 (UNEP). To act on these numbers, companies build an auditable Scope 1–3 inventory with CarbonTool.
How to use these figures
The figures below are well-established, broadly-cited benchmarks stated at a high level with the source named inline. Definitions, base years and methodologies differ between sources, and numbers are revised over time — always confirm the current figure against the cited primary source before republishing or relying on it for a disclosure.
Global emissions in context
The macro picture against which every corporate footprint is measured — broad, widely-cited figures from the IEA, UNEP, IPCC and the Global Carbon Project.
37+ Gt
Global energy-related CO2 emissions reached record highs above 37 gigatonnes per year in the mid-2020s.
Source: IEA
~37%
The buildings and construction sector accounts for roughly 37% of global energy- and process-related CO2 emissions.
Source: UNEP
~73%
Energy use (across electricity, heat, transport, buildings and industry) drives close to three-quarters of global greenhouse gas emissions.
Source: IEA / Our World in Data
1.1–1.2°C
Global average surface temperature has already risen by more than 1.1°C above pre-industrial levels.
Source: IPCC
1.5°C
Limiting warming to 1.5°C requires global emissions to roughly halve by 2030 and reach net zero around 2050.
Source: IPCC
~25%
Industry is one of the largest emitting sectors, responsible for roughly a quarter of global greenhouse gas emissions.
Source: IPCC
Corporate carbon accounting & standards
How companies measure and disclose emissions today — adoption of the GHG Protocol, science-based targets and voluntary disclosure.
Majority
The GHG Protocol Corporate Standard underpins most corporate and product carbon accounting and is used by the large majority of the world’s biggest companies.
Source: GHG Protocol
3 scopes
The GHG Protocol splits emissions into Scope 1 (direct), Scope 2 (purchased energy) and Scope 3 (value chain), with Scope 3 further divided into 15 categories.
Source: GHG Protocol
10,000+
Thousands of companies have set or committed to science-based emission reduction targets validated through the SBTi.
Source: SBTi
20,000+
Tens of thousands of companies disclose environmental data through CDP each year, representing a large share of global market capitalisation.
Source: CDP
Net zero
A majority of the world’s largest listed companies now have a public net-zero or carbon-neutrality commitment of some form.
Source: Net Zero Tracker
ISSB
The ISSB’s IFRS S2 climate standard consolidates TCFD-style disclosure into a global baseline that jurisdictions are progressively adopting.
Source: IFRS Foundation / ISSB
Scope 3 & the value chain
Why most of a company’s footprint sits outside its own operations, and why Scope 3 is the hardest part of carbon accounting.
70–90%
Scope 3 (value-chain) emissions typically make up 70–90% of a company’s total carbon footprint.
Source: CDP
11.4×
Supply-chain emissions are, on average, many times larger than a company’s direct operational emissions — CDP has reported a multiple of around 11x.
Source: CDP
15
The GHG Protocol defines 15 distinct Scope 3 categories, spanning purchased goods and services, transport, use of sold products and more.
Source: GHG Protocol
PCAF
For financial institutions, financed emissions (a Scope 3 category) are measured using the PCAF Standard and often dwarf operational emissions.
Source: PCAF
Regulation, CSRD & disclosure
The reporting rules now turning carbon accounting from voluntary to mandatory across the EU and beyond. Scope and thresholds are evolving — confirm current requirements before relying on them.
~50,000
The EU’s Corporate Sustainability Reporting Directive (CSRD) was estimated to bring sustainability reporting to roughly 50,000 companies, though scope and thresholds continue to be revised.
Source: European Commission
ESRS
CSRD reporting follows the European Sustainability Reporting Standards (ESRS), built on double materiality and covering climate, environment, social and governance topics.
Source: EFRAG / European Commission
VSME
The voluntary VSME standard gives small and medium-sized enterprises a proportionate way to report sustainability data to banks and larger customers.
Source: EFRAG
CBAM
The EU Carbon Border Adjustment Mechanism requires importers of certain carbon-intensive goods to report and, in its definitive phase, pay for embedded emissions.
Source: European Commission
SB 253
California’s climate disclosure laws (SB 253 / SB 261) require large companies doing business in the state to report Scope 1, 2 and 3 emissions and climate-related financial risk.
Source: State of California
What these statistics mean for your reporting
Two themes run through the figures above. First, the carbon that matters most sits in the value chain: with Scope 3 at 70–90% of the typical footprint, an inventory that stops at fuel and electricity misses the picture. Second, reporting is becoming mandatory at scale — CSRD, the VSME standard for SMEs, CBAM and customer-driven supplier requests all push more companies to produce defensible numbers built on the GHG Protocol. The practical response is the same: a single, audited data backbone covering Scope 1, 2 and 3.
That is what CarbonTool is built for. It calculates Scope 1–3 on the GHG Protocol with 200+ expert emission-source templates and a Pathfinder workflow for value-chain data, then produces CSRD, VSME, GRI, CDP, ISSB and PCAF outputs from the same dataset — with an audit trail on every figure. Pricing is transparent per organisation, with unlimited users and a free 30-day trial, so finance, operations and procurement all work from one source of truth. For a fuller comparison, see our guide to the best carbon accounting software.
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Scope 3 (value-chain) emissions typically account for 70–90% of a company’s total carbon footprint, according to CDP, and supply-chain emissions are on average many times larger than direct operational emissions. That is why CarbonTool measures Scope 1, 2 and 3 across all 15 GHG Protocol Scope 3 categories from one data backbone, with a supplier portal and Pathfinder workflow for collecting value-chain data. Always verify the exact share against the cited source for your sector.
The European Commission originally estimated that the Corporate Sustainability Reporting Directive (CSRD) would apply to roughly 50,000 companies, reporting against the European Sustainability Reporting Standards (ESRS). Scope and thresholds are being revised through subsequent EU "omnibus" proposals, so confirm the current requirements that apply to your company before relying on this figure.
The Greenhouse Gas (GHG) Protocol is the most widely used set of standards for corporate carbon accounting. It splits emissions into Scope 1 (direct), Scope 2 (purchased energy) and Scope 3 (value chain, across 15 categories), and underpins most corporate standards and frameworks including CSRD, CDP, SBTi and ISSB. CarbonTool calculates emissions on the GHG Protocol with 200+ expert emission-source templates.
Carbon accounting matters because it is now both a regulatory requirement and a commercial one: frameworks such as CSRD, VSME, CBAM and California SB 253/261 mandate disclosure, while customers and investors increasingly request emissions data. With Scope 3 at 70–90% of most footprints, only a structured, audited inventory reveals where emissions actually sit and where reductions are credible. CarbonTool provides that audit-ready inventory across Scope 1, 2 and 3 on one platform.
The buildings and construction sector accounts for roughly 37% of global energy- and process-related CO2 emissions (UNEP), while energy use overall drives close to three-quarters of global greenhouse gas emissions (IEA / Our World in Data). Global energy-related CO2 reached record highs above 37 gigatonnes per year in the mid-2020s (IEA). These are high-level, widely-cited figures — verify against the cited source before republishing.
Thousands of companies — well over 10,000 — have set or committed to emission reduction targets validated through the Science Based Targets initiative (SBTi), and a majority of the world’s largest listed companies now hold some form of net-zero commitment. CarbonTool helps you set, track and report progress against science-based and net-zero targets alongside your Scope 1–3 inventory.
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