Biodiversity Target-Setting for Banks: From TNFD Exposure to Priced Covenants

The problem

More than 230 banks have signed the Principles for Responsible Banking, together controlling over USD 60 trillion in assets, and a growing share of them now face a question their existing credit risk frameworks were not built for: what is our exposure to biodiversity loss, and what do we do about it? Unlike carbon, biodiversity has no single metric equivalent to a tonne of CO2, which is precisely why most banks default to vague commitments instead of measurable, priced targets.

Who this is for

This is written for bank risk officers, sustainability teams, and credit committees building portfolio-level nature targets, particularly those preparing TNFD-aligned disclosure or responding to CSRD-driven biodiversity reporting requirements from corporate counterparties.

Why this matters now

Biodiversity underpins the ecosystem services every real economy depends on, pollination, water filtration, soil fertility, and its decline is already a driver of default risk in agriculture, forestry and fisheries lending. TNFD's LEAP framework (Locate, Evaluate, Assess, Prepare) is becoming the reference methodology banks use to structure this exposure assessment, and CSRD is pulling nature-related disclosure requirements down the value chain to corporate borrowers, which means banks increasingly need borrower-level biodiversity data they did not previously collect.

The instrument: SMART targets, not portfolio slogans

A biodiversity target is not credible until it is SMART: specific, measurable, achievable, relevant and time-bound. "Reduce our impact on nature" is a mission statement, not a target a credit committee, an auditor, or a regulator can hold the bank to. A workable target specifies the metric (deforestation-risk commodity exposure, land-use change within a defined radius, a recognised biodiversity footprint tool), the baseline, the target level, and the date.

Transaction logic: ING's sustainability-linked loan to FrieslandCampina

In March 2021, ING extended a EUR 300 million sustainability-linked loan to FrieslandCampina, one of the world's largest dairy cooperatives. The interest rate is mechanically tied to three KPIs: greenhouse gas emissions reductions on member dairy farms, emissions cuts across production and transport, and improved traceability of raw materials including palm oil, soy, pulp and cocoa. The traceability requirement is the biodiversity lever: it directly targets deforestation-linked commodities in the cooperative's supply chain, converting an abstract "protect biodiversity" commitment into a measurable, revenue-linked covenant. This is the sustainability-linked loan model in practice, the pricing mechanism, not a side letter, is what enforces the target.

Risk allocation and portfolio-level exposure mapping

Before a bank can set a real target, it needs portfolio-level exposure mapping: which sectors and geographies in the loan book carry material biodiversity dependency or impact, agriculture, forestry, and extractives typically dominate. From there, targets should attach to transaction-level mechanisms (as with ING's loan), not sit as an unenforceable portfolio-wide aspiration. Client-level covenants are what make the target auditable at renewal or review.

MRV and verification

Traceability claims need third-party or supply-chain verification, not self-reported client assurances. This is where TNFD's LEAP methodology is useful even outside formal disclosure: it forces a structured evaluation of where in the value chain nature-related dependencies and impacts actually sit, which is the same diagnostic work needed to design a verifiable KPI.

Risks, limitations and greenwashing concerns

• Portfolio-wide targets with no transaction-level mechanism. A headline commitment with no pricing consequence at the loan level cannot be enforced and invites justified scrutiny.
• KPIs that are immaterial to the borrower's business. A dairy cooperative's traceability KPI is material because it addresses the actual deforestation risk in its supply chain; a KPI chosen because it is easy to measure rather than because it matters is a greenwashing risk.
• No independent verification path. Self-reported progress against a KPI, without third-party assurance, undermines the credibility of the entire structure.

Conclusion

Banks that have made real progress on biodiversity did not start with a portfolio-wide target; they started with one high-exposure client relationship, attached a measurable, verifiable, priced covenant to it, using the sustainability-linked loan structure, and used that as the template to scale. The FrieslandCampina loan works as a case study precisely because the KPI is specific enough to price, not a public commitment sitting outside the credit agreement.