Sustainability clauses in Dutch contracts: when are they enforceable?

A sustainability clause in a Dutch contract is enforceable to the extent that it is drafted as an obligation rather than an aspiration. A commitment to “strive towards” a target is an obligation of best efforts that is hard to breach; a commitment to achieve a defined outcome by a defined date is an obligation of result, and its breach gives the other party remedies under the Dutch Civil Code (Burgerlijk Wetboek, BW).

Two developments have moved these clauses to the centre of the contract. The Corporate Sustainability Reporting Directive (CSRD) requires companies in scope to report on their value chain, and the Corporate Sustainability Due Diligence Directive (CSDDD) requires them to address human rights and environmental impacts in their chain of activities. Both can in practice only be met through contracts with suppliers.

What is a sustainability clause?

It is a contract term that obliges a party to meet environmental, social or governance standards, such as an emissions target, a ban on child labour or a recycled-content percentage. Dutch law has no special rules for these clauses: they are ordinary contract terms under Book 6 BW.

That means the general rules on interpretation apply. Under the Haviltex standard (ECLI:NL:HR:1981:AB7031), a Dutch court looks not only at the wording but also at what the parties could reasonably expect from each other. A vague clause will therefore be read in light of the negotiations, the expertise of the parties and any codes of conduct referred to.

When is a sustainability clause legally enforceable?

When it states who must do what, by when, measured how. A clause that only refers to “our values” or “best practice” rarely gives a remedy if it is not met.

An enforceable clause contains a measurable target (for example a 30% reduction of scope 1 and 2 emissions by 31 December 2028), a reference standard or certification, a reporting duty with a fixed date, and audit rights. If the clause refers to a supplier code of conduct, make sure the code is actually part of the contract; under Article 6:233 BW, general terms that were not made available can be annulled.

Which remedies can you attach to a sustainability clause?

The general remedies for non-performance apply, but they work better if the contract spells them out. Agree in advance what happens if a target is missed.

• Suspension of your own performance, for example payment, under Article 6:262 BW.
• Dissolution (ontbinding) of the contract under Article 6:265 BW, after notice of default under Article 6:82 BW where performance is still possible.
• Damages under Article 6:74 BW, which require proof of loss; for sustainability breaches that proof is often difficult.
• A penalty clause (boetebeding) under Article 6:91 BW, which avoids the proof problem; the court can reduce an excessive penalty under Article 6:94 BW.
• A corrective action plan with a deadline, followed by a termination right if the plan is not delivered.

How do you pass obligations down the supply chain?

Through a chain clause (kettingbeding): your supplier must impose the same obligations on its own suppliers and include the same clause. Under Dutch law, a contract binds only its parties, so without such a clause your obligations stop at the first link.

Combine the chain clause with information and audit rights, because CSRD reporting requires data from deeper in the chain. Agree who bears the cost of audits and certification. Large buyers often shift those costs to small suppliers; the ACM can treat abuse of a dominant position as a breach of Article 24 of the Competition Act (Mededingingswet).

Which European rules affect sustainability clauses?

The CSRD and the CSDDD were amended in 2026 by the Omnibus I package. The CSRD now applies to EU companies with more than 1,000 employees and a net turnover above EUR 450 million.

Under the amended CSDDD, Member States must transpose the rules by 26 July 2028 and the obligations apply from 26 July 2029. Many smaller Dutch suppliers already face these requirements through their customers’ supplier terms. Our guide to the Corporate Sustainability Due Diligence Directive sets out the thresholds in more detail.

Sustainability agreements between competitors, such as a joint commitment to phase out a material, fall under competition law. The ACM has issued a policy rule on sustainability agreements (2023), and the European Commission’s Horizontal Guidelines of 2023 contain a chapter on them; check both before you agree joint targets with a competitor.

How does a sustainability clause create a greenwashing risk?

If you advertise a supplier’s sustainability performance that you cannot substantiate, you commit an unfair commercial practice under Articles 6:193a and following BW. Under Article 6:193j BW, you bear the burden of proving that a factual claim is correct.

From 27 September 2026, Directive (EU) 2024/825 bans generic environmental claims without recognised excellent environmental performance and claims of climate neutrality based on offsetting. The Authority for Consumers and Markets (ACM) enforces these rules. Make sure your contracts give you the data and evidence you need to back up every claim you make about your products.

What should you check as a buyer?

• Check that each target is measurable, dated and linked to a recognised standard or certification.
• Check that you have audit and information rights that reach beyond your direct supplier.
• Check that a penalty or termination right is attached to missing a target.
• Check that the supplier code of conduct is actually incorporated into the contract.
• Check that you can substantiate every sustainability claim you make to consumers with data from the supplier.

What should you check as a supplier?

• Check whether a target is an obligation of result or of best efforts, and whether you can actually meet it.
• Check who pays for audits, certification and the extra cost of compliance.
• Check whether the penalty is proportionate, and whether it is capped.
• Check what you must impose on your own suppliers under a chain clause.
• Check that you can terminate or renegotiate if the buyer’s requirements change during the contract.

What can we do for you with sustainability clauses?

Our corporate lawyers draft and negotiate sustainability clauses for buyers and suppliers.

• We review your existing supplier terms and identify which clauses are enforceable.
• We draft measurable targets, audit rights, chain clauses and penalty clauses.
• We check whether the CSRD or the amended CSDDD applies to your company and from when.
• We assess whether a joint sustainability agreement with competitors is compatible with competition law.
• We draft the notice of default and enforce the clause when a target is missed.

Summary

• A sustainability clause is an ordinary contract term; it is enforceable if it is specific, measurable and dated.
• Attach remedies in advance: suspension, dissolution under Article 6:265 BW, a penalty under Article 6:91 BW or a corrective action plan.
• A chain clause and audit rights are needed to reach beyond your direct supplier.
• Unsubstantiated sustainability claims are unfair commercial practices; stricter rules apply from 27 September 2026.

Frequently asked questions