How Sustainability Reporting and ESG Are Reshaping Access to Business Borrowing

Key Takeaway

Access to affordable business borrowing in the UK is increasingly conditional on the quality of a company’s Sustainability Reporting and its wider ESG credentials. Lenders now treat climate and sustainability performance as a formal credit risk factor not a marketing preference and expect borrowers to evidence a credible net-zero transition path.

Quick Answer

Yes – sustainability disclosures now materially influence UK borrowing decisions. In a 2024 survey of nearly 50 UK-based mid-market lenders conducted by Grant Thornton UK LLP, 73% reported having a formal ESG lending strategy in place (up from 57% in 2022) and 81% said a firm’s ESG status, or ability to transition to net zero, will have an increasing influence on their appetite to lend over the next five years. A further 93% believe regulators may require sustainability to be integrated into bank capital allocation models which will affect both availability and cost of borrowing.

Key Numbers at a Glance

Why Sustainability Reporting now matters to UK borrowers – the headline data.

Why Lenders Now Care About Sustainability Reporting

For most of the last two decades, UK bank lending decisions rested on financial covenants, cash flow and collateral. That model is changing. UK regulators, international standard-setters and the banks’ own net-zero commitments have combined to move Sustainability Reporting from a corporate communications activity to a core input into credit decisions. For a plain-English overview of the frameworks referenced here, see our guide What Is Sustainability Reporting? ESG Frameworks Explained.

Watch: Our 2-minute overview of how UK Sustainability Reporting and ESG credentials now shape lender decisions.

The UK Regulatory Direction of Travel

The Prudential Regulation Authority (PRA) first issued climate risk management expectations for banks and insurers in 2019 and materially updated them in December 2025 through Supervisory Statement SS5/25.

The updated regime requires UK banks to embed climate change into governance, risk management and scenario analysis and by extension, into how they underwrite corporate lending.

Alongside this, since April 2022 the Financial Conduct Authority (FCA) has required large UK listed and private companies, as well as asset managers, to report climate-related risks and opportunities in line with the Task Force on Climate-related Financial Disclosures (TCFD). These rules exist so that lenders and investors can assess borrowers’ sustainability more rigorously the raw material for that assessment is company disclosure.

The Rise of UK Sustainability Reporting Standards (UK SRS)

The UK is now transitioning to an even more comprehensive disclosure regime. The Department for Business and Trade is developing UK Sustainability Reporting Standards (UK SRS) based on the International Sustainability Standards Board’s IFRS S1 and IFRS S2. Draft standards were consulted on in 2025, are available for voluntary use from late 2025, and mandatory reporting for large UK companies is expected from 2026/27 (first reports due 2027).

For borrowers, this matters for two reasons:

1. FRS S2 will require banks themselves to disclose the emissions linked to the loans and investments they provide known as financed emissions (Scope 3, Category 15 under the GHG Protocol).
2. Banks cannot meet their own disclosure obligations without data from their borrowers.

The direct consequence: your Sustainability Reporting effectively feeds your lender’s regulatory return.

What Lenders Are Asking Borrowers Today

Regulatory direction is one thing; day-to-day lending practice is another. Across UK banking, three concrete changes are already visible in loan documentation, credit committees and relationship-manager conversations.

Credible Climate Transition Plans

Major UK banks now condition financing on credible transition plans in the highest-emitting sectors. In 2022, HSBC, the UK’s largest bank, announced it would require energy sector clients to provide transition plans consistent with HSBC’s climate targets in order to continue receiving financing, with the possibility of withdrawal of existing facilities where clients lack such plans. Barclays, NatWest and Lloyds have adopted comparable positions restricting financing for the most carbon-intensive activities unless robust transition commitments are in place.

For a borrower, this means a plausible, board-approved decarbonisation strategy covering Scope 1, 2 and material Scope 3 emissions is fast becoming a precondition of relationship banking.

Sustainability-Linked Loans (SLLs) and Green Loans

Sustainability-Linked Loans have become a mainstream financing product, Bloomberg Intelligence data recorded around US $227 billion of sustainability-linked loans and US $133 billion of green loans globally in 2024, with UK deal flow a significant component

In an SLL, the interest margin ratchets up or down, typically by 5 to 25 basis points, depending on whether the borrower hits agreed Sustainability Performance Targets (SPTs) such as absolute emissions cuts, renewable energy share, or other measurable ESG KPIs.

Alongside SLLs, some UK banks offer Green Loans with a built-in interest discount for eligible sustainable investment. Barclays, for example, currently advertises up to a 0.3% interest rate discount on business loans that fund eligible green assets such as EPC B-or-above.

The practical message: strong ESG performance is now literally cheaper to finance. Poor ESG performance carries a measurable “brown premium“.

ESG Data in Credit Due Diligence

Even for standard corporate loans, ESG is entering the credit paper. Industry analysis suggests that by 2026 ESG is “no longer a marketing overlay; it has become a formal, non-negotiable credit risk layer” for lenders. Banks now routinely request:

• Carbon footprint data (often via CDP or the borrower’s own sustainability report).
• Exposure to physical climate risks (e.g., flood risk on property collateral).
• Exposure to transition risks (e.g., how carbon pricing or regulatory change could impair the business model).

Because lenders now audit the data, not just the narrative, read our companion guide on How Organisations Can Build a Reliable Sustainability Data Framework for practical steps.

Why This Matters for Every Borrower – Not Just Large Corporates

There is a common misconception that sustainability-linked lending pressure applies only to FTSE 100 companies or heavy industry. The evidence points the other way.

Supply Chain Pressure on SMEs

Small and mid-sized organisations are not yet formally in scope of UK SRS or CSRD-style disclosure, but they are being pulled into the disclosure ecosystem through supply chains and financing relationships. Research from the British Business Bank finds that when SMEs are asked by business partners or financiers for carbon data, they become nearly four times more likely to prioritise net zero in their strategy according to the British Business Bank SMEs and Net Zero report, October 2025.

Larger customers, insurers, investors and banks are all now asking the same questions. If your organisation is a Tier 1 or Tier 2 supplier to a listed company, expect your customer to pass its lender’s data requests down to you.

Financed Emissions and the Bank’s Own Net-Zero Targets

Under the GHG Protocol, a bank’s loan book contributes to its Scope 3 Category 15 (Investments) emissions commonly called financed emissions. For most large UK banks, over 90–97% of their total climate impact comes from the companies and projects they finance rather than their own offices.

This means bank net-zero pledges such as NatWest’s aim to at least halve the climate impact of its financing activities by 2030 versus 2019, and HSBC’s sector-specific 2030 reduction targets of 34% for Oil & Gas and 75% for Power & Utilities intensity can only be achieved if the bank’s borrowers decarbonise.

Practically, banks that fall short will be forced to shift capital away from clients who are not aligning. Borrowers who cannot evidence a credible plan therefore face a growing risk of portfolio reallocation, a polite name for having their facilities gradually rationed or repriced.

The 2 – 10 Year Outlook – What Borrowers Should Expect

Mandatory Transition Plans

The UK Government has consulted on a manifesto commitment to mandate UK-regulated financial institutions (banks, asset managers, pension funds and insurers) and FTSE 100 companies to develop and implement credible transition plans aligned with the 1.5°C goal of the Paris Agreement. The FCA is expected to incorporate the Transition Plan Taskforce (TPT) Disclosure Framework, now embedded in IFRS S2, into UK listing rules by 2026–2027.

For a fuller picture of the UK Government’s direction of travel, see the GOV.UK consultation on Climate-related Transition Plan Requirements.

Standardisation of ESG Data and Third-Party Assurance

Expect the next decade to bring more consistent, decision-useful ESG data – driven by UK SRS, the EU CSRD spillover effect and industry initiatives such as PCAF (Partnership for Carbon Accounting Financials). Digital reporting tools are helping finance and sustainability teams keep pace, see our briefing on Digitalisation is Reducing Sustainability Reporting Fatigue.

Third-party assurance of ESG data is also becoming routine to reduce greenwashing risk. Verification is no longer optional read Audit-Ready ESG Data Is Becoming a Baseline Expectation for context on how bank credit teams are treating unverified data as suspect.

Broader ESG Scope Beyond Climate

While climate metrics currently dominate lending conversations, Sustainability Reporting is broadening to cover nature, biodiversity, water and human rights. Under IFRS S1 and forthcoming ISSB workstreams, disclosures will extend beyond carbon and lenders will follow. Borrowers should design data infrastructure that is extensible, not solely climate focused.

What Businesses Should Do Now – Short, Medium and Long-Term Actions for Working with Sustainability Consultants and Finance Teams

Short-Term (0–12 months)

• Baseline your Scope 1 and Scope 2 emissions using DESNZ Government Conversion Factors, this is the minimum data most UK lenders will expect.
• Screen for material Scope 3 categories relevant to your sector; do not attempt full Scope 3 in year one.
• Prepare an ESG credit pack for your relationship bank containing your emissions baseline, policies, targets and governance.
• Finance teams preparing for lender due diligence can use our UK Sustainability Reporting Readiness: A Practical Checklist to benchmark current maturity.

Medium-Term (1–3 years)

• Develop a credible transition plan aligned to the TPT / IFRS S2 framework, with board-approved interim milestones.
• Explore Sustainability-Linked or Green Loan structures at your next refinancing, even modest interest reductions of 5–25 basis points compound significantly over a five-year facility.
• Invest in sustainability reporting data infrastructure, spreadsheets will not survive lender-side assurance.

Long-Term (3-10 years)

• Prepare for mandatory UK SRS reporting and (for large companies) mandatory transition plan requirements.
• Anticipate Scope 3 data requests from customers and lenders and build a supplier engagement programme now.
• Consider whether your governance model gives sustainability the same board-level rigour as financial reporting.

Organisations that want structured, audit-ready support can explore TEAM Energy’s Sustainability Reporting services, delivered by experienced UK Sustainability Consultants with deep expertise in carbon accounting SECR and ESOS.

The Cost of Inaction

Ignoring the borrowing–ESG link creates three compounding risks:

1. Higher cost of capital. A weak ESG profile increasingly attracts a “brown premium” measurable in loan margin while strong performers unlock discounts.
2. Reduced access to credit. As banks reallocate portfolios to hit their own net-zero targets, unaligned borrowers may find facilities capped, not renewed, or repriced at maturity.
3. Reputational and customer risk. Losing a bank relationship rarely stays private; it signals stress to insurers, customers and investors.

Reporting is only the entry ticket; delivery is the differentiator – see our briefing Sustainability Reporting is Moving from Disclosure to Delivery.

Frequently Asked Questions

Does Sustainability Reporting Really Affect the Interest Rate I Pay?

Yes. In Sustainability-Linked Loans, the interest margin ratchets by roughly 5–25 basis points depending on whether Sustainability Performance Targets are met. In standard loans, ESG is now a factor in credit risk assessment and therefore in pricing.

My Business is an SME – Does This Apply to Me?

Indirectly, yes. SMEs are not yet in scope of UK SRS, but banks, insurers and larger customers routinely pass ESG data requests down the supply chain. Evidence shows SMEs asked for data are around four times more likely to act on net zero.

What is a “Financed Emission”?

It is the share of a borrower’s or investee’s greenhouse gas emissions attributed to the lender that finances them, reported under Scope 3 Category 15 of the GHG Protocol.

Which ESG Framework Should we Report Against?

For UK companies, the direction of travel is UK SRS (based on IFRS S1 and S2), while TCFD remains embedded in listing rules and public sector guidance. SECR remains mandatory for qualifying UK companies and LLPs. Because framework selection depends on company size, sector and lender expectations, many organisations engage UK Sustainability Consultants to map the right combination of frameworks to their specific reporting obligations and financing profile. All suppliers to the National Health Service (NHS) must also comply with the NHS’s defined sustainability reporting requirements.

Do we Need External Assurance of our ESG Data?

Increasingly yes. Banks are moving towards treating unassured ESG data with the same scepticism as unaudited financial data.

Do We Need to Work with Sustainability Consultants to Prepare for Lender Due Diligence?

Not always, but for most mid-market and larger UK borrowers, working with experienced UK Sustainability Consultants materially reduces the risk of failing lender due diligence. Consultants typically add value in four specific areas:

1. Baseline emissions calculation – ensuring Scope 1, 2 and material Scope 3 figures are calculated in line with the GHG Protocol and DESNZ conversion factors, so the numbers survive lender-side scrutiny.

2. Framework alignment – mapping disclosures to the frameworks lenders now recognise.

3. Transition plan drafting – producing a credible, board-approved decarbonisation plan aligned to the 1.5°C Paris pathway, which most major UK banks now expect from higher-emitting borrowers.

 4. Assurance-readiness – structuring ESG data and evidence so it can withstand third-party verification, which is fast becoming a baseline expectation from credit teams.

Organisations without in-house carbon accounting capability, or those preparing for their first Sustainability-Linked Loan or Green Loan, typically benefit most from external consultancy support during the 6-12 months preceding a refinancing event.

Glossary

• ESG: Environmental, Social and Governance – the framework used to assess an organisation’s non-financial performance.
• Sustainability Reporting: Structured disclosure of an organisation’s environmental and sustainability performance, risks and opportunities.
• Sustainability Consultants: Advisers who help organisations design, collect, verify and disclose sustainability data and strategy.
• TCFD: Task Force on Climate-related Financial Disclosures – the framework mandated by the FCA since 2022 for large UK entities.
• IFRS S1 / S2: ISSB sustainability disclosure standards; UK SRS is being built on these.
• ESOS: Energy Savings Opportunity Scheme. It is a mandatory energy assessment and energy-saving scheme in the UK for large organisations and corporate groups.
• UK SRS: UK Sustainability Reporting Standards – expected mandatory for large UK companies from 2026/27.
• SLL: Sustainability-Linked Loan – a loan whose pricing adjusts to ESG performance.
• PCAF: Partnership for Carbon Accounting Financials – the leading methodology for calculating financed emissions.
• Financed Emissions: GHG emissions attributed to a lender via its loans and investments (GHG Protocol Scope 3, Category 15).
• SECR: Streamlined Energy and Carbon Reporting is a mandatory framework introduced by the UK Government in April 2019 that requires eligible large UK companies and LLPs to disclose their UK energy use, greenhouse-gas emissions and energy-efficiency actions in their annual report.

Related TEAM Energy Resources

• What Is Sustainability Reporting? ESG Frameworks Explained
• UK Sustainability Reporting Readiness: A Practical Checklist
• How Organisations Can Build a Reliable Sustainability Data Framework
• Digitalisation is Reducing Sustainability Reporting Fatigue
• Audit-Ready ESG Data Is Becoming a Baseline Expectation
• What to Look for in a Carbon Reporting Software: A UK Buyer’s Guide
• Sustainability Reporting is Moving from Disclosure to Delivery.

Author

Prepared by the TEAM Energy Insights Team, supported by our Commercial Director Tom Anderton, and reviewed by senior TEAM Energy Sustainability Consultants with over 35 years of combined UK experience in carbon strategy, carbon reduction planning, carbon accounting, SECR and ESOS.

TEAM Energy has supported UK public and private sector organisations with energy and carbon data since 1985, delivering compliance, reporting and net-zero advisory services to more than 860 blue-chip customers across the UK.