The Architecture of Decarbonisation: Navigating the SBTi Methodology for Near-Term and Net-Zero Targets

Zero Standard provides the necessary technical foundation for these disclosures. This article examines the dual requirements of near-term and long-term target setting, the nuances of Scope 3 management, and the shift from carbon neutrality to deep decarbonisation.

• Scientific Alignment: Targets are considered "science-based" only if they align with the latest climate science deemed necessary to meet the goals of the Paris Agreement—limiting global warming to 1.5°C above pre-industrial levels.
• The Net-Zero Standard: Organizations must commit to deep decarbonisation of 90-95% across all scopes by 2050 at the latest, with "neutralisation" reserved only for residual emissions that cannot be eliminated.
• Scope 3 Imperative: For most sectors, if Scope 3 emissions account for more than 40% of the total footprint, a formal Scope 3 target is mandatory, requiring unprecedented supply chain transparency and engagement.
• Regulatory Convergence: The SBTi methodology serves as the technical engine for compliance with emerging standards such as ESRS E1 and IFRS S2, ensuring that corporate disclosures are backed by credible, time-bound action plans.
• Verification Rigour: The transition from self-declared goals to SBTi-validated targets involves a stringent third-party review process, mitigating greenwashing risks and enhancing investor confidence.

Why It Matters

For the modern enterprise, climate change is no longer an externalised environmental concern; it is a core financial and operational risk. Investors, lenders, and insurers are increasingly scrutinising the credibility of corporate climate claims. Without a validated science-based target, an organisation’s "Net Zero" claim lacks the methodological backing required to withstand the scrutiny of the "anti-greenwashing" era.

The SBTi framework provides a common language for decarbonisation. It removes the ambiguity of "carbon neutrality"—which often relied heavily on low-quality offsets—and replaces it with a requirement for absolute emission reductions. This shift is critical for risk management. Companies that fail to align with 1.5°C pathways face increasing capital costs, potential regulatory penalties under the EU’s Corporate Sustainability Reporting Directive (CSRD), and the risk of stranded assets in a rapidly decarbonising global economy.

Furthermore, the methodology forces a strategic re-evaluation of the supply chain. Since Scope 3 emissions frequently represent the largest portion of a company's carbon footprint, the SBTi framework necessitates a shift from transactional procurement to strategic partnership. This drives innovation in product design, material sourcing, and circular economy business models, ultimately creating more resilient and competitive organisations.

The Standard / Framework in Detail

The SBTi methodology is built upon the Greenhouse Gas (GHG) Protocol, but it adds a layer of prescriptive requirements regarding the pace and depth of reductions. The framework is divided into two primary components: Near-Term Targets and the Long-Term Net-Zero Standard.

Near-Term Targets (5-10 Years)

Near-term targets are the immediate milestones that drive action over the next decade. These targets must cover a minimum of five years and a maximum of ten years from the date of submission. For most companies, these targets require an absolute reduction in Scope 1 and 2 emissions of at least 4.2% annually, consistent with the 1.5°C pathway.

The Corporate Net-Zero Standard

The Net-Zero Standard, launched in late 2021, clarified the definition of corporate net-zero. It established that "net-zero" is reached only when a company has achieved its long-term science-based target (typically a 90% reduction across all scopes) and has neutralised any residual emissions (the remaining 5-10%) through permanent carbon removal and storage.

Key takeaway

"The Corporate Net-Zero Standard is the world’s first framework for corporate net-zero target setting in line with climate science. It includes the guidance, criteria, and recommendations companies need to set science-based net-zero targets consistent with limiting global temperature rise to 1.5°C." — Science Based Targets initiative

Scope 3 Boundary and Ambition

Scope 3 remains the most challenging aspect of the methodology. The SBTi requires that if a company’s relevant Scope 3 emissions are 40% or more of total Scope 1, 2, and 3 emissions, a Scope 3 target must be set. The boundary for near-term Scope 3 targets must cover at least 67% of total Scope 3 emissions. For long-term net-zero targets, this boundary increases to 90%.

Comparison of Target Types

Practical Applications

Implementing the SBTi methodology requires a cross-functional approach that integrates sustainability into finance, procurement, and operations.

1. Emissions Inventory and Baselining

The first step is a comprehensive GHG inventory conducted in accordance with the GHG Protocol Corporate Standard. This must include all seven GHGs required by the Kyoto Protocol. A common challenge here is data quality in Scope 3, particularly in Category 1 (Purchased Goods and Services) and Category 11 (Use of Sold Products). Companies often start with spend-based emissions factors and transition to activity-based data as supplier engagement matures.

2. Target Modelling and Feasibility

Once the baseline is established, organisations must model reduction pathways. This involves evaluating various levers:

• Energy Efficiency: Reducing absolute demand through operational excellence.
• Electrification: Switching from fossil-fuel-based heating and transport to electric alternatives.
• Renewable Energy Procurement: Utilising Power Purchase Agreements (PPAs) or bundled Energy Attribute Certificates (EACs) to reach near-100% renewable electricity (a requirement for Scope 2).
• Supply Chain Engagement: Implementing "Supplier Engagement Targets," where a company commits that a certain percentage of its suppliers will set their own science-based targets.

3. The Validation Process

The validation process is a formal audit by the SBTi technical team. It involves submitting a detailed disclosure form, providing evidence of calculations, and justifying the exclusion of any emission sources. This process typically takes several months and requires rigorous documentation.

Industry Examples

Example 1: Global Consumer Goods (FMCG) - Unilever

Unilever has been a pioneer in integrating SBTi targets into its "Compass" strategy. The company committed to a 100% reduction in Scope 1 and 2 emissions by 2030 and a 39% absolute reduction in Scope 3 emissions (from a 2010 baseline) by 2030.

Lessons Learned: Unilever found that the majority of its footprint lay in the "use phase" of products (Scope 3, Category 11). However, because the SBTi methodology evolved, they had to pivot their strategy to focus more heavily on raw material sourcing (Category 1) where they had more direct influence. Their "Climate Transition Action Plan" (CTAP) was one of the first to be put to a shareholder vote, demonstrating the link between SBTi targets and corporate governance.

Example 2: Heavy Industry - Holcim (Cement)

The cement industry is notoriously difficult to abate due to process emissions from clinker production. Holcim was the first in its sector to have its 2050 net-zero targets validated by the SBTi.

Lessons Learned: Holcim’s strategy relies on the "Sectoral Decarbonization Approach" (SDA), which allows for intensity-based targets in specific heavy industries. Their roadmap includes massive investment in Carbon Capture and Storage (CCS) and the development of low-carbon cements. This highlights that for heavy industry, SBTi targets are not just about operational efficiency but about fundamental R&D and capital expenditure shifts.

Example 3: Technology and Services Archetype

A global software-as-a-service (SaaS) provider recently sought SBTi validation. Their primary emissions were Scope 2 (data centres) and Scope 3 (purchased goods and services, and employee commuting).

Lessons Learned: By committing to 100% renewable energy for data centres, they addressed Scope 2 almost entirely. However, they struggled with Scope 3 Category 1. They implemented a "Green Procurement Policy" that mandated all vendors representing the top 50% of spend to have validated SBTi targets by 2027. This "cascading effect" is a core intent of the SBTi methodology.

Regulatory Implications

The SBTi is no longer a purely voluntary initiative; it is becoming the technical backbone of mandatory climate disclosures globally.

• IFRS S2 (Climate-related Disclosures): The International Sustainability Standards Board (ISSB) requires companies to disclose their climate targets and whether those targets are informed by international agreements (i.e., the Paris Agreement). SBTi alignment is the most direct way to satisfy this requirement. IFRS S2 Standard
• EU CSRD / ESRS E1: The European Sustainability Reporting Standards (ESRS) specifically require companies to disclose whether their GHG emission reduction targets are compatible with limiting global warming to 1.5°C. The ESRS E1-4 disclosure requirement mirrors the SBTi’s structure of near-term and long-term targets. EFRAG ESRS E1
• SEC Climate Disclosure (USA): While currently facing legal challenges, the SEC’s proposed and final rules emphasize the disclosure of transition plans and targets. If a company has publicly set a target (like an SBTi target), it must provide detailed data on how it intends to meet it. SEC Climate Rules
• UK SDR: The UK’s Sustainability Disclosure Requirements also lean heavily on the TCFD framework, which encourages the use of science-based methodologies for target setting. UK FCA SDR
• GHG Protocol: The SBTi methodology is fundamentally built on the GHG Protocol Corporate Standard. Any deviation from the Protocol usually results in a failure to achieve SBTi validation. GHG Protocol
• SBTi Corporate Net-Zero Standard: The primary reference for all validation criteria. SBTi Net-Zero Standard