# Sustainability-Linked Loans (SLLs): Structuring, KPIs and SPTs > How sustainability-linked loans work, the role of KPIs, SPTs and the margin ratchet, and how they differ from green loans — for GCC borrowers and lenders. **Source:** https://www.esgweise.com/insights/sustainability-linked-loans-sll-explained/ **Author:** Sumit Agarwal **Published:** 2026-05-04 **Frameworks:** LMA SLLP **Countries:** UAE, KSA, Qatar, Global --- ## Key points - A sustainability-linked loan (SLL) ties the borrower's cost of funds to its sustainability performance. - It uses KPIs and sustainability performance targets (SPTs), with a margin that ratchets up or down. - Unlike green loans, SLL proceeds are general-purpose — it is the targets, not the use, that matter. - Credibility depends on material KPIs, ambitious SPTs, and independent verification of performance. --- ## Introduction Most sustainable finance asks: *what is the money for?* Sustainability-linked loans ask a different question: *how is the borrower performing?* By tying the cost of funds to sustainability targets, an **SLL** turns a company's own improvement into a financial incentive. It is one of the fastest-growing instruments in GCC sustainable finance. This article explains how SLLs are structured, the role of KPIs and SPTs, and how they differ from green loans. It complements our note on [sustainability-linked loan assurance](/insights/sustainability-linked-loan-assurance-a-key-to-corporate-accountability/). ## How an SLL works A sustainability-linked loan links the borrower's **financial terms to its sustainability performance**. The mechanism is a **margin ratchet**: - The borrower agrees **KPIs** (the metrics) and **SPTs** (ambitious targets against them). - If the borrower **hits** its targets, the interest margin **falls**. - If it **misses**, the margin can **rise**. Crucially, the **proceeds are general-purpose** — an SLL is not a use-of-proceeds instrument. The incentive is in the performance, not the spending. ## KPIs and SPTs: the heart of the structure | Element | What it is | |---|---| | **KPI** | The metric — e.g. emissions intensity, renewable share, safety performance | | **SPT** | The ambitious, time-bound target set against the KPI | | **Margin ratchet** | The pricing adjustment tied to SPT performance | Aligned with the **LMA Sustainability-Linked Loan Principles**, the quality of the KPIs and SPTs is what determines whether an SLL is credible or cosmetic. The fastest way to discredit an SLL is to pick immaterial KPIs or unambitious targets — a margin discount for hitting a target the borrower would have met anyway. Lenders, regulators and the market increasingly scrutinise this. Material KPIs, genuinely stretching SPTs, and independent verification are what keep an SLL credible. A green loan controls where the money goes. A sustainability-linked loan rewards how the borrower performs. The discipline is choosing KPIs that actually matter. ## SLL vs green loan The distinction is fundamental. A **[green loan](/insights/green-transition-loans-lma-principles/)** restricts the *use* of proceeds to eligible green projects. An **SLL** leaves the use unrestricted but ties the *pricing* to sustainability performance. A borrower wanting general funding with a sustainability incentive uses an SLL; one financing a specific green asset uses a green loan. For the difference with the bond-market equivalents, see our note on [SLBs vs SLLs](/insights/slb-vs-sll-explained/). ## How ESGweise helps ESGweise helps GCC borrowers and lenders structure credible sustainability-linked loans — selecting material KPIs, calibrating ambitious SPTs aligned with the LMA principles, and preparing for the [independent verification](/insights/second-party-opinions-green-instruments/) of performance. See our [assurance](/services/assurance/) and [strategy](/services/strategy/) practices. ## Conclusion Sustainability-linked loans make a borrower's own improvement the basis of its pricing — through KPIs, SPTs and a margin ratchet, with proceeds left general-purpose. Their credibility lives or dies on the quality of the targets and the rigour of verification. For GCC borrowers, a well-structured SLL aligns financing with genuine sustainability performance; a weak one invites the greenwashing label. --- ## Frequently asked questions ### What is a sustainability-linked loan? A sustainability-linked loan (SLL) is a loan whose financial terms — typically the interest margin — are linked to the borrower meeting pre-agreed sustainability targets. If the borrower hits its targets, the margin falls; if it misses, the margin can rise. Unlike a green loan, the proceeds are not restricted to green projects; the incentive is in the performance, not the use. ### What are KPIs and SPTs in an SLL? KPIs (key performance indicators) are the metrics chosen to measure the borrower's sustainability performance — for example emissions intensity, renewable-energy share, or safety performance. SPTs (sustainability performance targets) are the ambitious, time-bound targets set against those KPIs. The loan's margin ratchet rewards or penalises performance against the SPTs. ### How is a sustainability-linked loan different from a green loan? A green loan is a use-of-proceeds instrument — the money must fund eligible green projects. A sustainability-linked loan is general-purpose — the proceeds can be used for any corporate purpose, but the pricing is tied to the borrower's sustainability performance against KPIs and SPTs. Green loans constrain use; SLLs incentivise performance. ### What makes a sustainability-linked loan credible? Material, relevant KPIs that reflect the borrower's core sustainability impact; genuinely ambitious SPTs that go beyond business-as-usual; and independent verification of performance against them. Loans with weak or immaterial KPIs, or unambitious targets, attract greenwashing criticism — which is why structuring and verification matter. --- Published by ESGweise Global LLC, Dubai. https://www.esgweise.com