A credible decarbonisation strategy is now a core business plan, not a sustainability side-project. Regulators (ESRS E1 transition plan), lenders (SLL KPIs), customers (Scope 3 pressure) and investors (SBTi validation) increasingly require one. This guide sets out the five-part structure that consistently survives assurance and delivers actual reductions.
Part 1 — Baseline
Everything begins with a complete, GHG Protocol-aligned inventory covering Scope 1, 2 and 3. Common failure modes:
- Missing refrigerants or fugitive gases.
- Only location-based Scope 2 (skip market-based).
- Scope 3 covered by spend-only proxy — not fit for target-setting.
Choose the base year deliberately: recent enough to reflect current operations, stable enough not to be an anomaly.
Part 2 — Target
Options ranked by credibility:
- SBTi-validated 1.5°C target — the market benchmark. Requires ~4.2% absolute Scope 1+2 reduction per year and a material Scope 3 target.
- Net-zero target aligned with SBTi Net-Zero Standard — 90% reduction by 2050 plus neutralisation of residuals.
- Sector-specific pathways — e.g. SBTi Financial Institutions Framework, IEA Net Zero Emissions Scenario.
Set both interim (2030) and long-term (2040 or 2050) targets.
Part 3 — Plan
A transition plan is a marginal abatement cost curve (MACC) wrapped in governance:
- Every material lever quantified in tCO₂e reduction and € cost per tonne.
- Sequenced by cost, feasibility and payback.
- Aligned with CapEx and OpEx budgets.
- Governance, ownership and milestones.
Typical high-value levers by scope:
- Scope 1 — heat electrification, fleet electrification, refrigerant transition.
- Scope 2 — energy efficiency, on-site solar, PPAs.
- Scope 3 — supplier engagement, product redesign, modal shift, financed transition.
Part 4 — Execution
Where most strategies fail. Execution requires:
- Data infrastructure — automated ingestion from ERP, meters, utility bills and suppliers.
- Governance — climate KPIs in executive compensation.
- Financing — Green Loans for eligible projects and SLLs tied to enterprise KPIs.
- Supplier programmes — cascading emissions expectations through procurement.
Part 5 — Reporting
Aligned with the assurance regime you are subject to (CSRD/ESRS, ISSB, CDP, SBTi progress). Report annually, with:
- Progress against interim milestones.
- Actions taken and their measured impact.
- Deviations from plan and remediation.
- Restatements when structural changes exceed the materiality threshold.
What "credible" looks like
Regulators, banks and reviewers converge on these tests:
- Scope 3 included where material.
- Interim targets, not just 2050.
- CapEx aligned with the plan.
- Governance at board level.
- Independent verification.
Related reading: What is a carbon footprint? and ESRS standards overview.
Frequently asked questions
Do SMEs need a transition plan?+
Under CSRD, only in-scope companies must disclose one — but SMEs supplying large corporates increasingly need one to remain preferred suppliers. Simplified SME plans are now emerging.
How long does it take to build a credible plan?+
For a mid-cap with reliable data, 4–8 months from baseline to validated SBTi target. Where data infrastructure is weak, allow 12+ months and prioritise data first.
Are offsets part of a credible plan?+
Under SBTi Net-Zero, offsets can only neutralise residual emissions after ~90% actual reduction. Offsets used to substitute for reduction undermine credibility.
This article follows Redigo Carbon's editorial standards: factual claims reference recognised frameworks — GHG Protocol, CSRD, ESRS, the Sustainability-Linked Loan Principles, the Green Loan Principles — and Redigo's opinions are labelled as such.
What this article is based on.
- SBTi — Corporate Net-Zero Standard — Science Based Targets initiative
- GHG Protocol — Corporate Accounting and Reporting Standard — GHG Protocol
- GHG Protocol — Scope 2 Guidance — GHG Protocol
- GHG Protocol — Corporate Value Chain (Scope 3) Standard — GHG Protocol
- ISO 14064-1 — Corporate greenhouse gas inventories — ISO
- TCFD — Recommendations of the Task Force on Climate-related Financial Disclosures — TCFD / FSB
- IFRS S1 / S2 — ISSB sustainability disclosure standards — ISSB / IFRS Foundation
- IEA — World Energy Outlook & sectoral net-zero scenarios — International Energy Agency
- IPCC — Sixth Assessment Report (AR6) — IPCC
Redigo Carbon distinguishes between regulatory requirements, industry standards, best practice and Redigo's own recommendations. See our editorial standards for how we research, cite and update this content.
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