As the race to net zero intensifies, two terms dominate the conversation: carbon accounting and decarbonisation strategy. Both are essential for climate action, but many organisations still struggle to understand their relationship. Should you build a carbon reduction roadmap before measuring your emissions? Or does strategy only work if it’s data-driven from the outset?
In this article, we explore the interplay between carbon accounting and decarbonisation strategy, and why sequencing them right can determine the success of your net zero plan.
What Is Carbon Accounting?
Carbon accounting is the process of measuring and tracking greenhouse gas (GHG) emissions associated with an organisation’s operations, products, or value chain.
Done properly, it provides:
- A quantified baseline of current emissions
- Breakdown by Scope 1, 2, and 3
- A foundation for regulatory compliance (SECR, CSRD, TCFD, etc.)
- Data to identify high-impact areas for carbon reduction
Key Approaches:
- Activity-based accounting: uses direct data (e.g. kWh, litres of fuel)
- Spend-based accounting: uses financial proxies (e.g. £ spent × emission factor)
Without accurate carbon accounting, it’s impossible to assess where you are, or whether your strategy is working.
What Is a Decarbonisation Strategy?
A decarbonisation strategy is a structured plan to reduce carbon emissions over time. It involves setting targets, identifying reduction opportunities, and mapping out implementation.
Common Components:
- Energy efficiency improvements
- Switching to renewable energy
- Process optimisation
- Supply chain engagement
- Low-carbon product design
Done right, decarbonisation is science-aligned, financially feasible, and integrated into wider business operations. But strategy without data is directionless.
The Interplay: Which Comes First?
This is not a binary debate, but let’s explore both sides.
The Case for Carbon Accounting First
Carbon accounting provides the starting point for strategic decisions. You can’t reduce what you haven’t measured. If you’re serious about achieving net zero, a granular understanding of your footprint is essential.
- You discover your Scope 3 emissions are 90% of your total footprint.
- You realise your refrigeration gases (Scope 1) are more carbon-intensive than electricity (Scope 2).
- You quantify emission hotspots across your supply chain.
These insights shape where you focus your reduction strategy.
The Case for Decarbonisation Strategy First
In some cases, especially for companies under urgent pressure to act, a top-down decarbonisation strategy can lead the process.
Setting bold targets (e.g. net zero by 2035) can catalyse investment and trigger internal momentum. It forces businesses to establish governance, allocate resources, and kickstart accounting efforts.
Why It’s Not Either/Or
In reality, the most effective approach is cyclical:
- Initial carbon accounting – to establish a baseline
- Strategy development – aligned with business goals and material issues
- Implementation – through funded, cross-functional action plans
- Ongoing accounting – to measure, optimise, and report progress
Carbon accounting and decarbonisation strategy feed each other, creating a continuous improvement loop.
A Practical Framework for Integration
- Measure
- Conduct a Scope 1, 2, and 3 emissions assessment
- Use activity-based data wherever possible
- Plan
- Identify reduction opportunities by process, site, or product
- Prioritise actions by cost, impact, and feasibility
- Act
- Execute quick wins (e.g. lighting upgrades)
- Launch long-term initiatives (e.g. supplier engagement, heat electrification)
- Track & Report
Case Example: Which Comes First?
Company A began by performing a detailed carbon footprint across all sites. It revealed that refrigeration and packaging were the main emission sources. The insights led to a targeted decarbonisation plan that reduced emissions by 28% in two years.
Company B, under shareholder pressure, declared a net zero commitment before conducting carbon accounting. The strategy drove fast action, but initial projects missed key hotspots. A retroactive emissions inventory helped refocus efforts on more material areas.
Lesson: Both approaches can work, but integrating them is essential for long-term success.
Conclusion
Carbon accounting and decarbonisation strategy aren’t rivals, they’re partners. One gives you clarity, the other gives you direction. You need both to make climate action credible, measurable, and effective.
So which comes first?
Start where you are. But don’t stop there.
Frequently Asked Questions (FAQ)
What is carbon accounting?
Carbon accounting is the process of measuring and tracking an organisation’s greenhouse gas emissions. It helps a business understand where its emissions come from and creates a baseline for future reporting.
What is a decarbonisation strategy?
A decarbonisation strategy is a plan for reducing emissions over time. It sets out the actions a business will take and explains how progress will be measured.
What is the difference between decarbonisation and carbon accounting?
Carbon accounting shows a business where its emissions currently come from. Decarbonisation uses that information to decide how those emissions can be reduced.
Which should come first, carbon accounting or decarbonisation?
Carbon accounting usually provides the strongest starting point because it gives the business reliable information to work from. However, an early reduction target can also encourage a company to begin measuring its emissions more carefully.
Why is an emissions baseline important?
A baseline gives the organisation a clear picture of its starting position. It can then compare future results against that figure to see whether its reduction plan is working.
How does carbon accounting support a decarbonisation strategy?
Carbon accounting can highlight the parts of the business responsible for the most emissions. This helps the organisation focus its time and investment on the areas where action could have the greatest effect.
How should a business begin its decarbonisation journey?
A business can begin by measuring its current emissions and identifying the most important sources. It can then develop a realistic reduction plan and update its carbon information regularly to track progress.
