Sustainability in the investment industry has evolved significantly in recent years, with 2025 marking a pivotal shift toward realism, pragmatism, and value creation.
Despite a decline in global sustainable debt issuance, momentum remained strong, with $6.2tn of green, social, sustainability, and sustainability-linked debt issued in H1 2025.
Looking ahead to 2026, sustainable debt markets are expected to continue maturing, with a clear emphasis on quality over quantity. Issuance should remain robust despite geopolitical and market headwinds, supported by continued investor demand and a growing focus on real-world impact. Green loans are set to remain dominant, while sustainability-linked and social loans continue to expand, particularly across EMEA, which remains the global anchor for sustainable lending.
Against this backdrop, Gemma Lawrence-Pardew, Head of Sustainability, and Natalie Sinha, Vice President of Sustainability have identified the five key sustainability themes they expect to shape the loan market landscape this year and beyond.
1. Market forces will continue to move the transition forward, with clearer definitions helping to drive progress in the debt markets
Transition finance will remain firmly centre stage in 2026, with global investment in renewables expected to reach new highs, driving growth, jobs, and affordable power. As well as renewables, there is a need for investment in grids, supply chains, and clean-tech manufacturing for solar, wind, batteries and hydrogen. The supply of critical minerals like lithium, cobalt, nickel, and rare-earth elements, which are essential for the energy transition, is likely to lag rising demand, creating additional investment opportunities.
Transition financing will continue to move beyond frameworks towards measurable execution and impact, helping to channel capital toward the critical investments needed to decarbonise high-emitting or hard-to-abate sectors. The publication of the LMA, APLMA, and LSTA’s Guide to Transition Loans in October 2025 is a significant boost for transition finance structures. In addition, ICMA’s Climate Transition Bond Guidelines (CTBG) were published in November 2025. The formal introduction of a distinct ‘transition’ label is expected to broaden the market across Asia-Pacific, Europe, and other regions. In the EU, the recent proposals to amend SFDR includes a specific transition category.
Overall, 2026 will see transition planning mature, enabling consistent, stress-tested strategies that channel capital to high-emitting and hard-to-abate sectors.
2. Climate adaptation and resilience, and nature and biodiversity, will continue to move up the agenda
For a long time, climate finance has focused on climate mitigation (clean energy and emissions reductions), while climate adaptation has been underfunded. However, the tide is turning, with climate adaptation and resilience gaining prominence, highlighted by the strong signal from COP 30, with an agreement to triple global adaptation funding by 2035.
The investment opportunity is huge for both public and private finance. Global demand for climate adaptation and resilience investments is expected to reach $0.5-$1.3 trillion a year by 2030(1), representing a 10-15x growth compared to today. Key themes cover food, infrastructure, health, community, water, energy and biodiversity resilience. Promising investment opportunities include climate intelligence and flood defences, resilient building materials, cooling, water efficiency and climate-adapted agriculture.
Nature and biodiversity are also expected to rise up the agenda. Global biodiversity funding must grow from c.$200 billion annually today to $500 billion by 2030 and $700 billion by 2050. (2). Expect more traction in nature-based solutions, bioeconomy, biodiversity credits, and nature-linked KPIs, with a broader focus beyond carbon to ecosystems, water, soil, and resilience.
3. An increased focus on social impact investing and social KPIs
Whilst social investing has typically been a smaller part of the sustainability universe, it is set to gain greater prominence in 2026.
Lenders and investors will focus on the key social investment themes: affordable, social and supported housing; healthcare and wellbeing; financial inclusion and employment creation; and education and workforce development, when structuring loans and sustainability-linked products. Blended finance and innovative funding solutions will continue to unlock capital for SMEs and underserved communities, ensuring that sustainable finance delivers measurable societal benefits, not just environmental ones.
Social KPIs and metrics are moving towards standardisation, helped by the EU’s CSRD/ESRS with social disclosures focussing impacts on the workforce, value chain, communities, and consumers. This includes reporting on labour practices, human rights, diversity, safety, and community engagement, amongst other metrics.
4. Seizing the opportunity for Small and Medium sized Enterprises (SMEs) to contribute to real-economy decarbonisation
SMEs will move higher up the sustainability agenda in 2026 as policymakers, lenders, and investors sharpen their focus on real-economy decarbonisation. SMEs account for upwards of 99% of private sector businesses in the EU, UK and USA, and contribute between 40-60% of business-driven greenhouse gas emissions. (3)
While SMEs ambition for sustainability is growing, access to finance isn’t keeping pace. Across markets, SMEs are struggling to access the capital needed to scale their sustainability efforts. The challenge will be scaling solutions that are proportionate, accessible, and commercially viable. Expect more blended finance structures, guarantees, and simplified sustainability-linked products designed specifically for SMEs.
5. Sustainability regulation will continue to recalibrate and evolve
2025 marked a period of turbulence and strategic reassessment for sustainability regulation. In the EU, sustainability regulation will continue its recalibration and selective simplification. The effects of framework consolidation and revisions will become clearer. With the Omnibus I proposal (amending CSRD and CSDDD) approved by the European Parliament Plenary, the simplification exercise is expected to materialise, reflecting a shift toward proportionate, risk-based, and decision-useful sustainability reporting. In parallel, the ongoing review of the SFDR is expected to provide more clarity and usability for investors. In the UK, regulatory developments will continue to evolve, particularly around disclosure standards and enforcement measures such as the FCA’s greenwashing powers.
Beyond simplification, greater emphasis will be placed on accountability, with regulators and market participants increasingly focused on verification, auditability, and enforceable outcomes. This ensures sustainability claims are backed by measurable results, and non-compliance carries meaningful consequences.
The holy grail of globally aligned sustainability reporting seems unlikely to materialise. But there is positive momentum towards comparability with the ISSB pushing for a global baseline for sustainability disclosures. Nonetheless, there is no doubt that sustainability regulation will continue to shape how loans, transition finance, and sustainability-linked instruments are structured, monitored, and ultimately held accountable for real-world impact.
Conclusion
One thing is for sure: sustainability is not standing still and 2026 will no doubt be another fascinating year. As these sustainability topics continue to shape the loan market, the LMA remains committed to supporting its members in navigating the evolving landscape. We do this through guidance and standardisation, advocacy and dialogue, and education and training, and sharing best practice across the industry.
Some of our key workstreams this year include our two active Taskforces, which are currently examining the role of Pure Play companies, and exploring ways to better enable SME engagement in the sustainability-labelled finance market. We are also actively engaging with regulators, policymakers, and industry bodies to ensure that sustainability requirements are proportionate, practical, and aligned with market realities. This includes in the EU on SFDR and in the UK on SDR.
By working together, the LMA and its members can help embed sustainability into the core of the loan market, ensuring that finance not only supports the transition to a low-carbon economy but also delivers broader societal and environmental benefits.
1. Investment Opportunities in the Climate A&R Market | BCG
2. State of Finance for Nature 2023 | UNEP – UN Environment Programme
3. Micro & small businesses make up 99% of enterprises in the EU – News articles – Eurostat and SMEs and Net Zero report 2025 | British Business Bank
