Why the Role of Small and Micro-Enterprises is Critical to the Sustainability Transition.

The global transition to a sustainable, low-carbon economy is often presented as a challenge for a handful of industrial giants. The well-known finding that just 100 companies, the 'Carbon Majors', are linked to 71% of global industrial greenhouse gas emissions has rightly focused attention on the fossil fuel and cement sectors’ central role in decarbonisation.

Yet this transition will not succeed through corporate action alone. The vast majority of those emissions flow through complex supply chains and into the everyday activities of millions of smaller businesses and consumers. This means that for a transition away from fossil fuels to succeed, the choices, practices and adaptations of fossil fuel users across the economy such as micro and small businesses will contribute to shape whether net zero targets are met. In other words, offer and demand go hand-in-hand in shifting away from fossil fuels.

Understanding the Role of Small Businesses.

In the United Kingdom, as of early 2025, the private sector comprises approximately 5.7 million businesses, with a staggering 99.18% of these firms classified as small, employing between zero and forty-nine people. Collectively, these businesses account for one-third (37%) of the UK’s total greenhouse gas emissions and half of emissions generated by all businesses. While these statistics highlight the significant role small businesses play in the national carbon landscape, it is essential to recognise the resource constraints many of them face. For these businesses, the transition is a strategic imperative for long-term competitiveness and resilience in the face of increasing regulation, climate risk, and the transition away from fossil fuels. The success of national and international climate targets depends on the ability of small businesses to navigate technical complexity and perceived costs through clear, actionable guidance.

The most compelling argument for small business decarbonisation is rooted in the technical definition of value chain emissions. Roughly 90% of the emissions attributed to the world's largest fossil fuel producers fall into Scope 3 Category 11, defined as the ‘use of sold products’. Essentially, when a small business fills its delivery van with diesel or heats its office with a natural gas boiler, those emissions are technically the business’s Scope 1 emissions, but they are simultaneously the fuel producer’s Scope 3 emissions.

This means that to reach net zero globally, millions of small businesses need to switch to low-carbon energy, electrified end-uses (from vehicles to equipment) and improve resource use (through energy efficiency and circular practices).

The Decarbonisation Checklist.

Businesses are increasingly expected to start and make progress on their sustainability journeys. Compulsory regulations are beginning to replace the voluntary reporting norms of the past decade, creating a trickle-down effect. The European Union’s Corporate Sustainability Reporting Directive (CSRD), which was recalibrated in late 2025 through the "Omnibus I" simplification package, primarily targets large firms with over 1,000 employees and €450 million in turnover. However, these large corporations are legally required to disclose detailed Scope 3 data, which includes the emissions of their micro and small suppliers. Large buyers increasingly favour suppliers who can provide high quality carbon data without friction, meaning that for a small business in 2026, a lack of climate data is a direct threat to their longevity. SMEs will, therefore, be increasingly asked for reporting that falls within the Voluntary Sustainability Reporting Standard.

The starting point for any serious emissions reduction is understanding where those emissions actually come from. A carbon footprint assessment covering Scopes 1-3 (e.g. considering supply chain, purchased goods, and business travel), almost always reveals that the biggest opportunities and hotpots for businesses of any size, large and small. Identifying these hotspots is essential as they vastly differ from business to business and between sectors.

Strategic management of the supply chain and travel is almost always the most impactful pillar of this transition. For many small and micro-businesses, purchased goods and services represent the largest share of their footprint due to the embodied carbon in materials and manufacturing. Focusing on the top 75% of spend helps identify which supplier relationships contribute most to that footprint – these emissions can be managed through supplier engagement to collaboratively reduce emissions, with an option to source lower-carbon products and materials from the same or different suppliers.  

Where fleets are involved, electrification is now commercially viable for most business use cases. Adopting low-carbon travel policies (e.g. train-first or no-fly rules) ensures journeys are only taken when essential.

Additionally, waste reduction (whether of materials, energy, or resources) tends to deliver both environmental and financial returns when managed through a circular economy approach.

However, such a deep change can be a daunting task, and perfection shouldn’t get in the way of progress. To help membership organisations and their members navigate this transition by breaking it down into accessible and practical steps, Climate Action for Associations (CAFA) has developed guidance to help organisations get started on their journey by implementing ‘First green steps for micro and small businesses’. This guidance was designed to help SMEs take their first climate action in a time- and cost-effective way. The journey can for instance include a public leadership commitment from the owner or manager, signaling that sustainability is now a business priority. Integrating these values into the onboarding process and regular checkins to ensure that everyone in the team is aligned with objectives such as waste reduction and ethical sourcing. By adding sustainability as an agenda item to existing operational meetings, businesses can maintain momentum and celebrate small wins without the need for separate, time-consuming administrative processes.

These practical, incremental steps allow small firms to build the credibility necessary to remain competitive in a landscape where sustainability is entering its ROI era.

Drivers & Barriers to Sustainability for SMEs.

The transition is accelerating for SMEs. For instance, carbon border adjustment mechanisms, which require importers to account for the embedded carbon in traded goods, are becoming a global regulatory trend. The EU's mechanism has been fully in force since January 2026, and the UK's own equivalent is confirmed for January 2027. SMEs supplying businesses that export to either market should be prepared to provide verified emissions data on their products, as this is increasingly becoming a condition of remaining eligible for contracts, and is set to become a global imperative as countries like Singapore, Japan, and Canada are beginning to move forward with their own equivalents. We can also anticipate an increasing expectation for sustainability credentials from SMEs, through the rollout of net zero standards and sustainability reporting regulations. For instance, the EU has developed a voluntary simplified sustainability reporting standard (VSME) specifically to reduce the administrative burden on smaller firms, a framework increasingly recognised as an international benchmark for SME sustainability disclosure.

However, technical reporting is only possible if the knowledge gap is addressed. According to the SME Climate Hub, a UN-backed initiative, 63% of small business leaders cite a lack of skills and knowledge as the primary barrier to climate action. Investing in workforce training is now a business priority, shortages in green skills, particularly in retrofit and energy auditing, can hinder progress as confirmed by both the UK government's own Clean Energy Skills assessment and independent research from the Centre for Understanding Sustainable Prosperity.

Understandably, financial barriers remain significant, yet SMEs do not have to navigate the transition alone. In the UK, various funding routes exist to provide the capital necessary for energy saving projects. By accessing these resources, SMEs can offset the initial costs of deep decarbonisation, ensuring that the shift to a low carbon model is both financially viable and strategically sound. They can also turn to their associations for support, education, upskilling and reskilling, as well as policy engagement to address barriers to decarbonisation.

Key Takeaways.

The success of global 2050 targets does not only rest in the boardrooms of a few giants, but also in the daily operational decisions of the millions. Membership associations act as the critical institutional intermediaries in this transition by providing the clarity and confidence small business owners need to take their first steps, as illustrated by the Federation of Small Businesses’ guidance and support to SMEs. By viewing sustainability as a strategic theme interwoven into the foundations of a business, micro-enterprises can improve their cost of capital, strengthen their brand reputation, and ensure their long-term resilience. . By viewing sustainability as a strategic theme interwoven into the foundations of a business, micro-enterprises can improve their cost of capital, strengthen their brand reputation, and ensure their long-term resilience. 

Decarbonisation is a collective endeavour, and even something as simple as the CAFA checklist provides a menu of initiatives necessary to ensure that the smallest players are the ones leading the way toward a sustainable future.

CAFA provides free support, guidance, peer-to-peer network, and a library of resources to help membership bodies guide their sectors through the transition. Join CAFA today to safeguard your sector tomorrow.