SMEs Face a $1.1 Trillion Green Finance Gap
Small businesses worldwide need around $1.1 trillion to pay for solar panels, better insulation, efficient equipment and other changes that reduce carbon emissions. However, the money is not reaching them. Applications for green finance have jumped by more than 65% since 2023, yet approval rates have barely moved. Most revealing of all: eight out of ten firms that looked into green finance options decided not to apply.
Research from Sage and the International Chamber of Commerce, released before COP31, shows that global climate finance exceeded $2 trillion in 2024. The problem is not a lack of capital. Instead, smaller companies cannot navigate the requirements lenders impose, while banks struggle to assess thousands of small loans at reasonable cost.
For UK manufacturers, retailers and service firms trying to cut energy bills or meet supply chain demands, this matters. Consequently, the transition to lower carbon operations risks becoming something only larger businesses can afford.
Why most firms walk away before submitting applications
Fewer than 3% of surveyed SMEs had applied for a green finance product during the period measured by the ICC and Saga research. Meanwhile, 27% said they were interested in sustainability finance. The gap between intention and action points to barriers that appear before any credit decision gets made.
Firms cited complicated application processes as the main reason they abandoned plans to apply. Lenders asked repeatedly for environmental, social and governance information. Each request required time, expertise and data that many small businesses simply do not have.
More than 80% of financial institutions identified unreliable sustainability data from SMEs as a major obstacle to offering green finance. This creates a loop. Banks want proof of emissions, energy use and credible transition plans before they price or approve loans. Small firms lack the staff and systems to produce that proof. The administrative burden discourages applications, leaving lenders with limited data and businesses without funding.
Separately, research from the OECD found that 41% of SMEs identified insufficient funding as a barrier to climate action. A further 63% reported limited knowledge of what funding options even exist. The result is a funding gap that persists despite record flows of climate finance globally.
Emerging economies face deeper structural challenges
Access problems are worse in developing countries. Smaller firms often lack formal credit histories, collateral and financial literacy. Therefore, they rely on family loans or informal lenders rather than banks.
The International Finance Corporation estimates that formal SMEs in developing economies face $5.2 trillion in annual unmet financing needs. That figure covers all business finance, not just green investment. Nevertheless, it illustrates the scale of exclusion from mainstream credit markets.
In addition to finance, the OECD lists limited staff capacity, insufficient technical knowledge, high upfront costs and long payback periods as barriers to sustainability investment. Uncertainty over technology, regulation and future demand adds further risk. For businesses operating on tight margins, these factors make green investment difficult to justify, even when it would lower costs over time.
The case for simpler reporting standards
The ICC and Sage research calls for a single, accepted reporting standard covering energy use, emissions and other ESG indicators. Standardisation could reduce duplicated requests, lower transaction costs and make applications easier to compare.
Currently, each lender or scheme may ask for different information in different formats. A business applying to three programmes can face three sets of paperwork, often covering the same underlying facts. This repetition wastes time and discourages further applications.
Streamlined reporting would benefit both sides. Banks could assess applications faster and more consistently. Businesses would spend less time on administration and more on the actual investment. Importantly, it would also improve data quality, making it easier to verify environmental claims and reduce the risk of greenwashing.
However, reporting standards alone will not close the gap. The OECD argues that SMEs also need technical assistance, help preparing investment plans, compliance support and access to public guarantees or concessional finance. These measures address the skills and capacity constraints that prevent firms from developing credible projects in the first place.
Measuring the finance shortfall
Different studies use different methods, which explains why estimates vary. The $1.1 trillion figure represents the total investment SMEs need globally for renewable energy, energy efficiency and decarbonisation. The ICC and Sage report also mentions $789 billion as an untapped financing opportunity identified within their specific research sample.
Both figures are large. Either way, the core finding remains the same: small businesses need substantial capital to make the transition, and current financing mechanisms are not delivering it at scale.
Furthermore, 56% of SMEs lack a financial plan for renewable energy or energy efficiency investment. Without a plan, it is difficult to apply for finance or demonstrate to lenders that a project will succeed. Yet preparing a credible plan requires skills and time that many small firms cannot spare.
Commercial implications for UK businesses
Access to green finance affects competitiveness, compliance and operating costs. For instance, 71% of SMEs in the research believe environmental action can reduce their operating costs. Energy efficiency upgrades, better insulation and renewable energy installations lower bills. However, the upfront cost and long payback periods make these investments hard to justify without external finance.
Supply chain pressure is also growing. Large buyers increasingly expect suppliers to report emissions, set reduction targets and demonstrate progress. Public sector buyers apply PPN 06/21, which requires suppliers bidding for contracts above certain thresholds to publish a carbon reduction plan. Businesses that cannot fund the necessary changes risk losing contracts.
Similarly, extreme weather events are becoming more frequent. Flooding, heatwaves and storms disrupt operations and damage property. Resilience measures such as flood defences, cooling systems and backup power require capital. Firms that cannot invest may face higher insurance premiums, more downtime and greater long term costs.
Regulation is tightening as well. The UK government has committed to cutting emissions and is introducing requirements that affect energy use, waste and reporting. Businesses that delay investment may face sudden, forced changes later at higher cost and with less time to plan.
In short, green investment is not just about compliance or reputation. It affects cash flow, risk management and the ability to win work. Consequently, barriers to finance have direct commercial consequences.
Key details from the research
- Global climate finance exceeded $2 trillion in 2024, yet SMEs struggle to access it.
- SMEs need an estimated $1.1 trillion worldwide to fund renewable energy, energy efficiency and decarbonisation projects.
- Applications for green finance increased by more than 65% since 2023, but approval rates have not risen in line.
- Eighty percent of SMEs that explored green finance options decided not to apply, citing complicated processes and repeated ESG data requests.
- Fewer than 3% of surveyed SMEs had applied for a green finance product, despite 27% expressing interest.
- More than 80% of financial institutions identify a lack of reliable sustainability data from SMEs as a major barrier to expanding green lending.
- Fifty six percent of SMEs lack a financial plan for renewable energy or energy efficiency investment.
What UK firms should consider
Start by understanding what finance options exist. Government schemes, regional development funds and commercial green loans all have different criteria, timescales and costs. Researching these early avoids wasted effort on unsuitable applications.
Next, gather baseline data on energy use and emissions. Even basic records make it easier to identify where improvements would save money and to demonstrate credibility to lenders. Businesses that already measure their carbon footprint have a head start when applying for finance or responding to supply chain requests.
Consider working with advisors who understand both the technical and financial sides of green investment. For example, our compliance services help businesses prepare the emissions data and reduction plans that lenders and buyers increasingly expect. Similarly, our net zero program for carbon reporting compliance supports firms in meeting regulatory and tender requirements.
Look for investments with clear payback periods. Energy efficiency measures often deliver savings within a few years, making them easier to justify commercially. Renewable energy installations may take longer but can be supported by feed in tariffs or power purchase agreements that improve returns.
Prepare a credible plan before approaching lenders. This should cover the technology, expected savings, timeline, risks and how you will measure progress. A well prepared plan reduces the perceived risk for lenders and speeds up approval.
Finally, watch for changes in reporting standards and public support schemes. Governments and industry bodies are working to simplify green finance, and new programmes may become available. Staying informed means you can act quickly when opportunities arise.
Where to find authoritative guidance
The UK government provides guidance on energy efficiency grants and schemes through the Business Energy Advice Service on the gov.uk website. This includes information on available support for reducing energy costs and carbon emissions.
The Department for Energy Security and Net Zero publishes updates on climate policy, funding and regulation at gov.uk. These resources cover the policy context shaping green finance and business obligations.
For information on carbon reduction plans required under PPN 06/21, the government provides detailed guidance on the procurement policy note page. This explains requirements for public sector suppliers and how to prepare compliant plans.
The OECD maintains research and data on SME finance, sustainability and policy at oecd.org. Their publications provide international context and comparative analysis of barriers and solutions.