GLP vs SLLP: Green vs Sustainability-Linked Loans

As Vietnamese banks and international lenders push ESG-labelled facilities into the market, borrowers increasingly face a structuring choice they cannot delegate to their bankers alone: Green Loan Principles vs Sustainability-Linked Loan Principles (GLP vs SLLP). The two frameworks look similar on a term sheet but carry materially different legal, financial, and reporting consequences.

Choosing the wrong one can mean restricted proceeds for a diversified group, or a margin ratchet tied to KPIs the business cannot credibly hit. This article sets out, in practical terms, how Vietnamese corporates and project sponsors should evaluate both.

Table of Contents

What Is a Green Loan Under the Green Loan Principles (GLP)?

The Green Loan Principles were developed jointly by the Loan Market Association (LMA), the Asia Pacific Loan Market Association (APLMA), and the Loan Syndications and Trading Association (LSTA). They provide a voluntary market framework for labelling a loan instrument “green” based on how the proceeds are used, not on the borrower’s overall corporate profile. For a Vietnamese manufacturer financing a rooftop solar installation, or a developer financing a certified green building, the GLP route is usually the natural starting point.

The Four Core Components of GLP

A facility that wants to carry the “green loan” label is expected to satisfy four components recognised across GLP, APLMA, and LSTA guidance:

Use of Proceeds — funds must be allocated exclusively to eligible green projects, specified in the facility agreement.
Process for Project Evaluation and Selection — the borrower discloses its environmental sustainability objectives and the process for determining project eligibility.
Management of Proceeds — proceeds are credited to a dedicated account or otherwise tracked, with a formal internal process for monitoring allocation.
Reporting — the borrower reports annually, until full drawdown, on the use of proceeds and, where feasible, the qualitative and quantitative environmental impact.

Eligible Green Project Categories

GLP guidance lists indicative project categories: renewable energy, energy efficiency, pollution prevention and control, sustainable water management, clean transportation, and green buildings certified to a recognised standard. For a Vietnamese borrower, mapping a specific capex line item against one of these categories is the first legal task — not a marketing exercise, because the facility agreement will define “Eligible Green Project” as a contractual term with conditions precedent and representations attached to it.

What Is a Sustainability-Linked Loan Under the SLLP?

The Sustainability-Linked Loan Principles, issued by the same three trade associations, cover a fundamentally different instrument. An SLLP facility is not restricted by use of proceeds — it can fund general corporate purposes, working capital, or acquisitions — and instead ties economic terms, almost always the margin, to the borrower’s performance against pre-agreed sustainability key performance indicators (KPIs).

The Five Core Components of SLLP

Selection of KPIs — relevant, core, and material to the borrower’s business and sector.
Calibration of Sustainability Performance Targets (SPTs) — ambitious, benchmarked against an external reference point or science-based trajectory where possible.
Loan Characteristics — the margin mechanism that rewards or penalises performance against the SPTs.
Reporting — at least annually, on performance against each SPT.
Verification — independent external verification of performance against each SPT at least once a year.

Selecting Meaningful KPIs and Sustainability Performance Targets (SPTs)

This is where most Vietnamese SLLP negotiations are won or lost. A KPI such as “percentage of electricity sourced from renewable sources” is only meaningful if it is material to the borrower’s actual emissions profile and verifiable from existing or readily obtainable data.

Takeaway: an SPT that is too easy to hit invites reputational criticism (sometimes called “sustainability-washing”); an SPT that is unrealistic invites covenant disputes. Vietnamese borrowers in energy-intensive sectors — textiles, cement, aquaculture processing — should calibrate SPTs against three to five years of their own historical data plus a credible forward trajectory, not an industry benchmark borrowed from a different market.

Green Loan Principles vs Sustainability-Linked Loan Principles: Structural Differences

Although both frameworks sit under the same umbrella of voluntary, principles-based market guidance, the legal architecture of each is distinct.

Use of Proceeds vs General Corporate Purposes

GLP facilities are proceeds-restricted: the loan agreement will typically include a dedicated utilisation condition, an eligibility schedule, and often a right for the lender to require re-allocation or prepayment if proceeds are misapplied. SLLP facilities, by contrast, are purpose-agnostic — the KPI and margin mechanism sit alongside an otherwise conventional revolving credit facility or term loan, with no utilisation restriction at all.

Margin Mechanics — Fixed Pricing vs Two-Way Ratchets

Under GLP, pricing is usually set at drawdown and does not move based on environmental outcomes (although some lenders now offer a modest green discount as a separate commercial incentive). Under SLLP, pricing is intrinsic to the structure: most facilities use a margin ratchet of 2.5 to 10 basis points per KPI, applied symmetrically (both up and down) or asymmetrically (down only, which Vietnamese borrowers should resist agreeing to without reciprocal protection).

Covenant and Default Consequences

Missing an SPT under SLLP is a pricing event, not — under standard market drafting — an event of default. Misapplying proceeds under GLP can, depending on drafting, trigger a breach of a specific affirmative covenant, with mandatory prepayment risk attached. This distinction matters more to a Vietnamese borrower’s board than the headline “ESG loan” label ever will.

Comparison Table: GLP vs SLLP at a Glance

Feature	Green Loan (GLP)	Sustainability-Linked Loan (SLLP)
Use of proceeds	Restricted to eligible green projects	Unrestricted — general corporate purposes
Core metric	Project eligibility criteria	Sustainability KPIs and SPTs
Margin mechanics	Typically fixed; optional green discount	Ratchet tied to KPI performance (up/down)
Reporting	Allocation and impact of proceeds	Annual KPI performance vs SPTs
External review	Second-party opinion on framework (common)	Independent verification of KPI performance (required annually)
Typical borrower profile	Discrete green capex project or asset	Corporate-wide transition strategy
Consequence of shortfall	Potential covenant breach / re-allocation	Margin step-up (pricing event, not default)

Which Framework Fits Your Project or Corporate Strategy?

The Green Loan Principles Vietnam market has so far concentrated in renewable energy and green real estate, while SLLP structures are migrating into manufacturing, agriculture, and diversified conglomerates with broader transition ambitions. Choosing between them starts with one question: is the financing for a specific, identifiable green asset, or for the business as a whole?

A secondary question follows closely: can the borrower credibly measure and report the relevant metric for the full life of the facility, which in a typical syndicated term loan may run five to seven years? Lenders increasingly test this during due diligence, and a borrower that cannot answer convincingly on data availability should expect the financing to default back to a conventional, unlabelled facility rather than an ESG-labelled one.

When a Green Loan Makes Sense

A discrete, identifiable capex project (solar, wind, wastewater treatment, certified green building).
A project company structure (illustrative) where lenders want proceeds segregated from the sponsor’s other activities.
A borrower able to commit to dedicated tracking and annual impact reporting on that specific project.

When a Sustainability-Linked Loan Makes Sense

General corporate purposes financing, working capital, or a revolving facility that cannot practically be ring-fenced to one project.
A borrower pursuing a group-wide decarbonisation or ESG transition strategy, not a single asset.
A business with reliable historical data to calibrate credible, material KPIs.

Hybrid and Dual-Track Structures

In an illustrative structure, a diversified Vietnamese group might finance a green-certified logistics facility under GLP terms within a broader group facility that also carries SLLP-style KPI pricing on the parent’s revolving credit line.

This is increasingly seen in APLMA-guided transactions in the region and should be documented as two clearly delineated tranches, not blended into a single ambiguous “ESG tranche.” Keeping the tranches separate also protects the borrower if one tranche later needs to be refinanced, upsized, or exited independently of the other — a blended structure makes that kind of amendment considerably harder to negotiate with a syndicate, since lenders may disagree on whether a change to one mechanism requires consent thresholds tied to the whole facility.

Legal and Documentation Considerations for Vietnamese Borrowers

Whichever framework is chosen, the commercial intent must be translated into enforceable contractual mechanics — this is where legal counsel earns its fee, and where many term sheets fall short once drafted into a full facility agreement.

Drafting the Green/SLL Covenant Package in the Facility Agreement

Key drafting points include: the precise definition of “Eligible Green Project” or “KPI” and “SPT”; the mechanism and timing for margin adjustment (and whether it is prospective or retrospective from the test date); whether a KPI miss is cured by later performance; and which party bears the cost of external verification. IVLF Advisors’ banking and finance team regularly negotiates these mechanics for Vietnamese borrowers facing both local and international lender syndicates.

External Review, Second-Party Opinions, and Verification

GLP transactions commonly obtain a second-party opinion confirming the framework’s alignment with GLP at or before signing. SLLP transactions require — not merely recommend — independent, qualified external verification of KPI performance at least annually; this is a contractual condition for maintaining SLL pricing treatment, not a voluntary best practice.

Vietnamese Regulatory and Disclosure Context (General/Illustrative)

Vietnam does not yet operate a standalone statutory licensing regime for “green loans” or “sustainability-linked loans” as such; GLP and SLLP remain voluntary, lender-driven market standards layered onto ordinary Vietnamese credit and foreign-loan documentation and State Bank of Vietnam foreign loan registration requirements where applicable.

Borrowers should treat any statement about specific decree-level green taxonomy criteria, tax incentives, or green credit reporting obligations as general and illustrative only, and verify current requirements with counsel before documentation is finalised, given the pace of regulatory development in this area.

Cross-Border Lending and Foreign Loan Registration Considerations

Many Green Loan Principles and Sustainability-Linked Loan Principles facilities extended to Vietnamese borrowers are cross-border, syndicated, or offshore-funded, which brings ordinary Vietnamese foreign-loan rules into play alongside the ESG mechanics — including State Bank of Vietnam registration of medium- and long-term foreign loans, permitted use-of-proceeds restrictions under foreign exchange regulations, and withholding tax on interest.

None of these requirements disappear because a facility carries a green or sustainability-linked label; if anything, the additional reporting and verification obligations under GLP or SLLP sit on top of, not instead of, standard Vietnamese cross-border lending compliance. Borrowers should sequence legal review of both tracks together rather than treating ESG structuring and regulatory compliance as separate workstreams handled by different advisers at different times.

Common Pitfalls in GLP and SLLP Transactions

Both the Green Loan Principles and the Sustainability-Linked Loan Principles are voluntary and principles-based, which means the quality of the outcome depends almost entirely on the quality of drafting and internal governance a Vietnamese borrower brings to the negotiation. The most common pitfalls IVLF Advisors sees in practice are set out below, and each one is avoidable with earlier legal involvement in the term sheet stage rather than at facility agreement execution.

Vague eligibility criteria that leave “green” project qualification to lender discretion without objective standards.
KPIs that are immaterial to the borrower’s core environmental footprint, inviting sustainability-washing criticism from investors or NGOs.
No clarity on verification cost allocation, which routinely becomes a late-stage negotiation flashpoint.
Treating a KPI miss as a technical default when market-standard drafting treats it as a pricing event only.
Underestimating ongoing reporting burden, which persists for the life of the facility, not just at closing.

How IVLF Advisors Helps Vietnamese Borrowers Choose and Negotiate

IVLF Advisors structures and negotiates both Green Loan Principles and Sustainability-Linked Loan Principles facilities for Vietnamese borrowers and project sponsors, working alongside banking, tax, and ESG advisory teams to align the facility agreement with the business’s actual capacity to deliver on green or KPI commitments — rather than accepting a lender-drafted template at face value.

Green Loan Principles Vietnam — Photo: Wikimedia Commons (public domain / CC0)

In practice, ESG financing for Vietnamese borrowers succeeds when the borrower treats the SLLP as a performance commitment rather than a pricing discount. Sustainability-linked loan KPIs should be measurable, externally verifiable, and ambitious relative to the borrower’s own baseline. A margin ratchet in a sustainability-linked loan should be tested against realistic scenarios before signing, because the SLLP ties the economics to reported results. The GLP, by contrast, asks mainly for ring-fenced proceeds and reporting on the funded projects.

Choosing Between a Green Loan and a Sustainability-Linked Loan under the SLLP?

The right ESG financing framework depends on your project structure, available data, and risk appetite for KPI-linked pricing. Speak confidentially with an IVLF Advisors banking and finance partner before signing a term sheet. Request a confidential consultation.

Frequently Asked Questions

Is a Green Loan always cheaper than a conventional loan?

Not necessarily. Pricing depends on lender appetite and market conditions. Some lenders offer a modest green discount, but the GLP label itself does not guarantee lower pricing — it governs proceeds use and reporting, not cost of funds.

Can a facility combine GLP and SLLP features?

Yes, illustratively, through clearly separated tranches — one proceeds-restricted, one KPI-linked — rather than a single blended mechanism, to keep covenant and default consequences distinct and enforceable.

What happens if we miss an SLLP KPI target?

Under standard market drafting, a missed Sustainability Performance Target triggers a margin step-up (a pricing event), not an automatic event of default — but this must be confirmed in your specific facility agreement.

Do Vietnamese regulators require GLP or SLLP certification?

No standalone statutory certification regime currently applies; GLP and SLLP are voluntary market frameworks. Applicable Vietnamese credit, foreign-loan registration, and tax rules still apply alongside them and should be verified for your specific transaction.

Who pays for external KPI verification under SLLP?

This is a negotiated commercial point, commonly borne by the borrower, and should be fixed expressly in the facility agreement rather than left to later discussion with the lender.

Choosing between the Green Loan Principles and the Sustainability-Linked Loan Principles is ultimately a question of what your business can prove, track, and sustain over the life of the facility — not which label reads better in a press release. As a practical next step, map your intended use of funds and available ESG data against the two frameworks above before engaging lenders on term sheet pricing, so that the structure you sign reflects what your business can actually deliver.

This article is provided for general informational purposes as of its publication date and does not constitute legal, financial, or tax advice for any specific transaction. Vietnamese regulatory treatment of green and sustainability-linked financing continues to develop; borrowers should obtain current, matter-specific advice from qualified counsel before finalising any facility agreement. For reference, see the Asia Pacific Loan Market Association (APLMA) and the Loan Syndications and Trading Association (LSTA), which jointly publish and maintain the Green Loan Principles and Sustainability-Linked Loan Principles.