Scope 3 & Supply Chain Emissions

Managing carbon across your value chain

View All Carbon Footprint & Reporting Services

What Are Scope 3 Emissions?

Scope 3 emissions are indirect greenhouse gas emissions that occur across your value chain, both upstream and downstream. They include emissions from purchased goods, transport, waste, business travel, product use, and investments. Understanding Scope 3 is essential for setting credible targets, improving ESG ratings, and embedding sustainability into procurement and product strategy.

Understanding and Managing Carbon Beyond Your Direct Control

For most organisations, Scope 3 emissions represent the largest share of their total footprint. At Arthian, we help you take control by building a robust, defensible emissions profile – aligned with global standards and backed by actionable insights. Whether you’re starting out or scaling up, we help you quantify, prioritise, engage, and reduce.

Our Scope 3 Emissions Services

Arthian provides end-to-end Scope 3 support, from screening and modelling to supplier engagement, governance, and strategic integration. We help you build credible inventories, identify reduction opportunities, and embed Scope 3 into your systems and decision-making.

Scope 3 Screening & Materiality

Quantification & Emissions Modelling

Supplier Engagement & Primary Data

Decarbonisation Roadmaps & Strategy

Governance & Systems Integration

Sector-Specific Scope 3 Support

Verification & Assurance Readiness

Scope 3 Screening & Materiality

We map all 15 Scope 3 categories under the GHG Protocol and identify which are most material, relevant, and actionable based on your business model, value chain, and reporting objectives. This helps focus your efforts where they’ll have the greatest impact, supporting credible disclosures and targeted reduction strategies.

Our service includes:

Comprehensive category mapping – Screening all 15 Scope 3 categories to understand full value chain emissions.
Materiality assessment – Prioritising categories based on emissions impact, data availability, and strategic relevance.
Business model alignment – Tailoring analysis to your sector, operations, and supply chain structure.
Reporting readiness – Supporting alignment with frameworks like GHG Protocol, TCFD, and CSRD.
Actionability insights – Highlighting where meaningful interventions and improvements are possible.

Quantification & Emissions Modelling

We define calculation boundaries, collect and analyse data gaps, and perform emissions calculations using spend-based, activity-based, or hybrid methods. Our approach applies high-quality emissions factors across categories like purchased goods, transport, and financed emissions, ensuring accurate, credible Scope 3 quantification.

Our service includes:

Boundary setting – Defining organisational and value chain boundaries for Scope 3 analysis.
Data gap analysis – Identifying missing or low-quality data and recommending improvements.
Calculation methods – Applying spend-based, activity-based, or hybrid approaches based on data availability.
Emissions factor application – Using robust, up-to-date factors across key Scope 3 categories.
Category-specific modelling – Tailoring calculations for high-impact areas like procurement, logistics, and finance.

Supplier Engagement & Primary Data

We help you move from estimates to real data by engaging suppliers directly, building more accurate Scope 3 reporting and stronger climate partnerships. Our approach includes questionnaires, emissions templates, onboarding support, and integration with procurement platforms, all aligned with supplier science-based targets (SBTs).

Our service includes:

Supplier questionnaires – Collecting emissions data across key Scope 3 categories.
Emissions templates – Providing structured formats to support consistent reporting.
Onboarding support – Helping suppliers understand requirements and build capability.
Platform integration – Linking data collection with procurement and contract systems.
SBT alignment – Encouraging suppliers to set and report against science-based targets.

Decarbonisation Roadmaps & Strategy

We identify emissions hotspots across your value chain and design targeted Scope 3 reduction pathways that align with Science Based Targets initiative (SBTi) guidance. Our approach combines data insights with practical interventions to drive meaningful change.

Our Scope 3 strategy includes:

Hotspot analysis to pinpoint high-impact areas across your supply chain
Low-carbon procurement strategies to reduce embodied emissions in purchased goods and services
Circular design principles that minimise waste and extend product lifecycles
Supplier engagement campaigns to encourage emissions reductions and data transparency
Behavioural interventions that support sustainable choices across operations
Alignment with SBTi criteria to ensure credibility and consistency in reporting

Governance & Systems Integration

We build internal systems to maintain Scope 3 inventories, integrating with ESG platforms and ERP systems, establishing governance protocols, and preparing for verification and audits. Our approach ensures your Scope 3 data is well-managed, decision-ready, and aligned with broader sustainability reporting.

Our service includes:

Systems integration – Connecting Scope 3 data with ESG platforms, ERP systems, and reporting tools.
Governance protocols – Defining roles, responsibilities, and oversight structures for emissions management.
Inventory maintenance – Establishing processes to update and refine Scope 3 data over time.
Audit readiness – Preparing documentation and controls for third-party verification.
Cross-functional coordination – Aligning sustainability, finance, and procurement teams around Scope 3 goals.

Sector-Specific Scope 3 Support

We tailor Scope 3 strategies to your sector, whether you’re in manufacturing, finance, logistics, or real estate, ensuring relevance, granularity, and auditability. Our approach reflects the unique emissions drivers, data challenges, and reporting expectations of each industry, helping you build credible and actionable Scope 3 plans.

Our service includes:

Sector-specific mapping – Identifying high-impact Scope 3 categories based on your industry profile.
Custom methodologies – Applying calculation approaches suited to your operational and data context.
Audit-ready outputs – Ensuring documentation and processes meet verification standards.
Benchmarking and insights – Comparing performance and practices across peers and sectors.
Strategic alignment – Linking Scope 3 actions with sector-relevant Net Zero and ESG goals.

Verification & Assurance Readiness

We design Scope 3 inventories that are audit-ready, aligned with ISO 14064-3 and GHG Protocol standards. Our approach supports third-party verification processes, helping you build confidence in your data and meet growing stakeholder and regulatory expectations.

Our service includes:

Standards alignment – Structuring inventories to meet ISO 14064-3 and GHG Protocol requirements.
Documentation support – Preparing evidence and records for external assurance.
Audit trail development – Ensuring traceability across data sources, calculations, and assumptions.
Verification coordination – Supporting engagement with third-party auditors and verifiers.
Quality control – Reviewing data and processes to ensure consistency, accuracy, and completeness.

Scope 3 Screening & Materiality

Comprehensive category mapping – Screening all 15 Scope 3 categories to understand full value chain emissions.
Materiality assessment – Prioritising categories based on emissions impact, data availability, and strategic relevance.
Business model alignment – Tailoring analysis to your sector, operations, and supply chain structure.
Reporting readiness – Supporting alignment with frameworks like GHG Protocol, TCFD, and CSRD.
Actionability insights – Highlighting where meaningful interventions and improvements are possible.

Quantification & Emissions Modelling

Boundary setting – Defining organisational and value chain boundaries for Scope 3 analysis.
Data gap analysis – Identifying missing or low-quality data and recommending improvements.
Calculation methods – Applying spend-based, activity-based, or hybrid approaches based on data availability.
Emissions factor application – Using robust, up-to-date factors across key Scope 3 categories.
Category-specific modelling – Tailoring calculations for high-impact areas like procurement, logistics, and finance.

Supplier Engagement & Primary Data

Supplier questionnaires – Collecting emissions data across key Scope 3 categories.
Emissions templates – Providing structured formats to support consistent reporting.
Onboarding support – Helping suppliers understand requirements and build capability.
Platform integration – Linking data collection with procurement and contract systems.
SBT alignment – Encouraging suppliers to set and report against science-based targets.

Decarbonisation Roadmaps & Strategy

Hotspot analysis to pinpoint high-impact areas across your supply chain
Low-carbon procurement strategies to reduce embodied emissions in purchased goods and services
Circular design principles that minimise waste and extend product lifecycles
Supplier engagement campaigns to encourage emissions reductions and data transparency
Behavioural interventions that support sustainable choices across operations
Alignment with SBTi criteria to ensure credibility and consistency in reporting

Governance & Systems Integration

Systems integration – Connecting Scope 3 data with ESG platforms, ERP systems, and reporting tools.
Governance protocols – Defining roles, responsibilities, and oversight structures for emissions management.
Inventory maintenance – Establishing processes to update and refine Scope 3 data over time.
Audit readiness – Preparing documentation and controls for third-party verification.
Cross-functional coordination – Aligning sustainability, finance, and procurement teams around Scope 3 goals.

Sector-Specific Scope 3 Support

Sector-specific mapping – Identifying high-impact Scope 3 categories based on your industry profile.
Custom methodologies – Applying calculation approaches suited to your operational and data context.
Audit-ready outputs – Ensuring documentation and processes meet verification standards.
Benchmarking and insights – Comparing performance and practices across peers and sectors.
Strategic alignment – Linking Scope 3 actions with sector-relevant Net Zero and ESG goals.

Verification & Assurance Readiness

Standards alignment – Structuring inventories to meet ISO 14064-3 and GHG Protocol requirements.
Documentation support – Preparing evidence and records for external assurance.
Audit trail development – Ensuring traceability across data sources, calculations, and assumptions.
Verification coordination – Supporting engagement with third-party auditors and verifiers.
Quality control – Reviewing data and processes to ensure consistency, accuracy, and completeness.

Why Choose Arthian's Carbon Consultants?

Engineering services delivered by specialists:

Integration

Fully integrated with geotechnical, hydrological, and ecological disciplines.

Our Experience

National experience with regional insight and regulatory familiarity.

Our Understanding

Deep understanding of planning, infrastructure, and environmental interfaces.

Results Driven

Commitment to technical rigour, clear communication, and long-term outcomes.

Frequently Asked Questions

Which Scope 3 categories matter most?

This depends on your sector. For example: Manufacturers focus on purchased goods and transport; financials on investments; real estate on capital goods and tenant emissions. We help you identify what’s most material.

How can I get accurate Scope 3 data?

We start with high-quality proxies (e.g. spend-based data), then work with you to collect primary data from suppliers and integrate it into your systems over time.

Is Scope 3 needed for SBTi?

Yes. Science-Based Targets require Scope 3 targets if these emissions account for more than 40% of your total footprint—which is true for most organisations.

Get in Touch

We’d love to hear from you – whether you have a question, a project in mind, want to explore job opportunities, or just want to say hello.

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Scope 3 & Supply Chain Emissions

What Are Scope 3 Emissions?

Understanding and Managing Carbon Beyond Your Direct Control

Our Scope 3 Emissions Services

Scope 3 Screening & Materiality

Quantification & Emissions Modelling

Supplier Engagement & Primary Data

Decarbonisation Roadmaps & Strategy

Governance & Systems Integration

Sector-Specific Scope 3 Support

Verification & Assurance Readiness

Scope 3 Screening & Materiality

Quantification & Emissions Modelling

Supplier Engagement & Primary Data

Decarbonisation Roadmaps & Strategy

Governance & Systems Integration

Sector-Specific Scope 3 Support

Verification & Assurance Readiness

Why Choose Arthian's Carbon Consultants?

Integration

Our Experience

Our Understanding

Results Driven

Frequently Asked Questions

Which Scope 3 categories matter most?

How can I get accurate Scope 3 data?

Is Scope 3 needed for SBTi?

Get in Touch