Where party autonomy meets mandatory law in Dutch contracts

Under Dutch law, contracting parties are free to decide whether to contract, with whom and on what terms. That freedom ends where mandatory law (dwingend recht) begins: a clause that conflicts with a mandatory statutory rule is void or, if the rule only protects one party, voidable, and the statutory rule applies instead. Party autonomy (contractsvrijheid) is therefore the starting point in every Dutch contract, and mandatory law is the boundary. Knowing exactly where that line runs is what separates an enforceable contract from an expensive one.

What does party autonomy cover in Dutch law?

Party autonomy covers most of Dutch contract law, because most statutory contract rules only apply if you have not agreed otherwise. The main exceptions are rules that protect weaker parties, rules on form and the general standard of reasonableness and fairness.

Dutch contract law assumes that parties are the best judges of their own interests. Book 6 of the Dutch Civil Code (Burgerlijk Wetboek, BW) contains many rules on offer and acceptance, performance, default and damages. The great majority of them are regulatory law (regelend recht): they apply only if the parties have not agreed something else. That is why a Dutch commercial contract can depart from the statutory rules on notice periods, on the moment risk passes, on interest, on limitation of liability and on the consequences of late delivery. Experienced parties routinely do so.

Freedom of contract in the Netherlands has three separate components, and it helps to keep them apart:

• Freedom to contract at all. In principle nobody can be forced into an agreement, and negotiations can be broken off. That freedom is subject to the duty of good faith in the pre-contractual phase.
• Freedom to choose a counterparty. This is limited mainly by equal treatment legislation and by competition law.
• Freedom of content. This is the freedom to decide what the contract says. It is the freedom that mandatory law restricts most often.

Does a Dutch contract need to be in writing?

Usually not. Dutch law imposes very few requirements of form. Most contracts are valid whether they are signed on paper, concluded by email or agreed orally, which is a real practical advantage of doing business in the Netherlands.

The exceptions are specific and mandatory. A prenuptial agreement (huwelijkse voorwaarden) requires a notarial deed. The transfer of shares in a private limited company (BV) requires a notarial deed. A non-compete clause must be agreed in writing, and a suretyship given by a private individual is subject to its own formalities. Where the law prescribes a form, ignoring it is not a technicality: the act is normally null.

Can a court set aside a clause you freely agreed?

Yes. Under article 6:248 BW a contract has not only the effects the parties agreed, but also those that follow from reasonableness and fairness (redelijkheid en billijkheid). A contractual rule does not apply if, in the circumstances, applying it would be unacceptable by those standards.

That rule is easy to overlook. It is not mandatory law in the strict sense, but it has the same practical effect: a court can decline to enforce a clause the parties freely negotiated. Courts apply this test with restraint, particularly between professional parties. For a broader overview of the system as a whole, see our guide to contract law in the Netherlands.

How do you know whether a rule is mandatory?

A provision is mandatory when the law does not allow parties to depart from it. You establish that from the statute itself, from the chapter it sits in and from its protective purpose, because Dutch legislation rarely uses a label.

Book 2 BW is the clearest case. According to article 2:25 BW, its provisions may be departed from only in so far as the law itself allows. That reverses the default: in company law the rules are mandatory unless the legislator has opened a door. In employment law and consumer law the mandatory rules are grouped and identified per subject. In tenancy law whole sections are declared binding in favour of the tenant.

What is three-quarters mandatory law?

It is a rule that individual parties cannot set aside, but a collective labour agreement (CAO) can. Dutch law recognises this intermediate category, three-quarters mandatory law (driekwartdwingend recht), which has no real equivalent in common law systems.

Several important employment rules work this way, including parts of the regime on successive fixed-term contracts in article 7:668a BW. The practical consequence is that the same clause can be void in one company and valid in another, simply because a sector CAO applies. Checking whether a CAO governs the relationship is therefore not an afterthought but a first step.

Void or voidable: why does the difference matter?

A void clause never has effect; a voidable clause stands until the protected party invalidates it. The sanction is set out in article 3:40 BW.

A legal act whose content or purport is contrary to good morals or public order is null and void (nietig). It never had legal effect, anyone can rely on that, and no time limit applies. A legal act that conflicts with a mandatory statutory provision is also null, unless the provision is intended only to protect one of the parties. In that case the act is voidable (vernietigbaar).

Voidable means the protected party may invoke the defect, in court or by an out-of-court declaration. Until it does so, the clause stands. This is the mechanism behind most consumer protection: the trader cannot rely on an unfair clause once the consumer invalidates it, but the consumer is free to leave it alone.

Does one invalid clause bring down the whole contract?

Normally not. Article 3:41 BW provides that where a ground of nullity concerns only part of a legal act, the rest stays in force, unless it is inseparably connected to the invalid part given the content and purport of the act.

Dutch law therefore applies severability by operation of law. A severability clause remains useful, because it records what the parties consider separable and signals their intention to a court. But it is evidence of intent rather than the source of the rule, and it cannot rescue a clause that goes to the heart of the bargain.

There is also a middle route that is often more attractive than nullity. Under article 3:42 BW, if it can be assumed that the parties would have chosen a valid arrangement had they known of the defect, the void clause is converted (conversie) into a valid one with a corresponding effect. A limitation of liability that reaches too far may, for example, be reduced to what the law permits rather than struck out entirely. That is precisely why conditional drafting is worth the effort.

How do party autonomy and mandatory law compare?

Party autonomy comes from the agreement; mandatory law comes from statute and wins where the two collide. The table below sets out how they differ in source, effect and reach.

It also explains why a contract review in the Netherlands always has two questions rather than one: what did we agree, and what were we allowed to agree?

Where does mandatory law limit general terms and conditions?

General terms and conditions are where mandatory law bites hardest in Dutch commercial practice. Articles 6:231 to 6:247 BW govern not only what the terms say, but also whether they became part of the contract at all.

Two obligations run in parallel. First, the user of the terms must give the counterparty a reasonable opportunity to take note of them before or when the contract is concluded, normally by handing them over or sending them with the offer. Second, the individual clauses must not be unreasonably onerous. If you fail the first test, the clause can be annulled without any discussion of its content.

What are the black list and the grey list?

For contracts with consumers, the Civil Code contains two lists that largely decide the outcome in advance. Clauses on the black list are always unreasonably onerous; clauses on the grey list are presumed to be.

Article 6:236 BW contains the black list (zwarte lijst). These clauses can always be annulled. Examples are a term that excludes or limits the consumer’s right to dissolve the contract, and a term that allows the trader to raise the agreed price within three months of contracting without giving the consumer a right to dissolve.

Article 6:237 BW contains the grey list (grijze lijst). These clauses are presumed to be unreasonably onerous, which shifts the burden of proof to the trader. The list covers familiar drafting habits, such as a right for the trader to deliver a performance that differs materially from what was promised, an unusually long or vague period for the trader to perform, and a term that releases the trader wholly or partly from a statutory obligation to pay damages.

Do these rules also protect businesses?

Partly. Large companies cannot rely on the reasonableness test at all, while small businesses may receive protection comparable to that of consumers.

Businesses often assume these lists are irrelevant to them. Two refinements say otherwise. First, article 6:235 BW excludes large parties from invoking the reasonableness test, using criteria based on the obligation to publish annual accounts and the number of employees. A substantial company therefore loses a defence that a small one keeps.

Second, Dutch courts apply the reflex effect (reflexwerking). A small business acting outside its ordinary field of activity, in a position comparable to a consumer, may benefit from the standards of the black and grey lists even though the lists do not apply directly. The practical lesson is that one set of terms for consumers, small traders and multinationals is a false economy. Our article on the risks of copying general terms and conditions sets out what goes wrong in practice, and our guide to drafting general terms and conditions explains how to build a set that survives review.

Whose terms apply in a battle of forms?

Under article 6:225 paragraph 3 BW, the set of terms referred to first prevails, unless the other party expressly rejects it. This battle of forms is the other recurring point in commercial disputes.

Express rejection has to be explicit and specific. A standard sentence buried in the reply is regularly held to be insufficient. This is one of the few places where an ordinary purchase order can decide a liability cap worth a great deal of money.

How much freedom do shareholders have in Dutch company law?

Less than a shareholders agreement suggests. In company law the default is reversed: the statutory rules bind, and you can depart from them only where the law expressly allows it.

Because article 2:25 BW allows deviation from Book 2 only where the law says so, the starting point for a Dutch BV or NV is that the statutory rules apply. The articles of association can depart from them only where the legislator has expressly created that possibility. The flexibilisation of BV law in 2012 widened those possibilities considerably. It allowed shares without voting rights or without profit entitlement, tailor-made transfer restrictions and instruction rights for a specific body. But each of those options exists because the statute permits it, not because the shareholders agreed on it.

What can a shareholders agreement not do?

A shareholders agreement cannot change the company itself. It binds the shareholders who signed it, like any other contract, but not the company or third parties.

A shareholders agreement (aandeelhoudersovereenkomst) is binding between the shareholders. An obligation in it to vote in a particular way binds the shareholder personally. However, a resolution adopted in breach of that obligation is not automatically invalid, and a third party acquiring shares without joining the agreement is not bound by it. Where an arrangement is meant to have effect against successors and against the company itself, it belongs in the articles of association. Our article on the shareholders agreement examines that division of labour in detail.

Which mandatory limits recur in practice?

Three limits come up again and again: the duties of directors, the standard of reasonableness and fairness within the company, and the protection of capital and creditors.

• Duty of directors. Directors owe the company a duty of proper performance of their task under article 2:9 BW. That duty cannot be excluded in advance. Discharge (decharge) can only be granted afterwards, by the competent body, and only for what that body could see from the accounts and the information provided.
• Reasonableness and fairness. Article 2:8 BW requires the company and everyone involved in its organisation to behave towards one another according to standards of reasonableness and fairness. It is the main legal basis on which a majority shareholder can be held to account for pushing a decision through.
• Capital and creditor protection. These rules, including the distribution test the board must apply before a dividend is paid out, are not at the disposal of the shareholders at all.

Minority protection follows the same pattern. The right to have the general meeting convened, the right to information within the meeting, the right to challenge resolutions and the right to ask the Enterprise Chamber (Ondernemingskamer) to order an inquiry into the policy and affairs of the company are statutory rights. A shareholders agreement cannot make them disappear. It can, however, regulate how and when the parties will try to resolve a deadlock before invoking them. What that looks like in a real dispute is set out in our article on the rights of minority shareholders.

What does that look like in a real case?

An anonymised example makes the boundary concrete. Two founders of a BV agree that no new shares will be issued for five years under any circumstances, to protect their stakes against dilution. A year later the company is close to insolvency, and an investor is willing to fund it in exchange for newly issued shares.

The clause binds the founders as shareholders, and a founder who votes for the issue may in principle be liable for breach of contract. It does not, however, override the duty of the board to act in the interest of the company and its stakeholders. A court asked to enforce the clause by injunction may refuse to do so where enforcement would push the company into bankruptcy. Freedom of contract survives, but the remedy is likely to be compensation between the founders, not a veto over the survival of the company.

Which employment rules can you not contract out of?

You cannot contract below the statutory floor of Dutch employment law. An employment contract that falls below mandatory or three-quarters mandatory provisions is corrected rather than enforced.

The statutory minimum wage and holiday allowance apply whatever the contract says. The Working Hours Act (Arbeidstijdenwet) caps working time and prescribes rest periods. Statutory holiday entitlement of four times the weekly working hours accrues by law under article 7:634 BW. It cannot be bought off during the employment relationship, although accrued days above the statutory minimum can be.

Can an employer design its own dismissal procedure?

No. Outside probation, summary dismissal and termination by mutual consent, ending an open-ended contract requires either permission from the UWV or a decision of the subdistrict court (kantonrechter).

The UWV route applies to redundancy and long-term incapacity for work. The court route applies to personal grounds, such as underperformance or a disturbed working relationship. The route follows the reason for dismissal and is not a matter of choice. Statutory notice periods apply. An employee who is dismissed is in principle entitled to the transition payment (transitievergoeding), calculated according to the statutory formula, and a contractual waiver of that entitlement in advance has no effect. The maximum amount of the transition payment is adjusted every year by the Ministry of Social Affairs and Employment, so any figure written into a template dates quickly.

How does a settlement agreement fit in?

A settlement agreement shows that party autonomy and mandatory law can work together rather than against each other. The parties agree to end the employment, but mandatory safeguards stay in place.

Many Dutch employment relationships end with a settlement agreement (vaststellingsovereenkomst). Because the parties agree to terminate by mutual consent, the statutory dismissal grounds do not have to be proved. Mandatory law nevertheless remains in the background. Under article 7:670b BW the employee has two weeks to revoke consent, or three weeks if the right of revocation was not mentioned in the agreement. The wording of the agreement also determines whether unemployment benefit is at risk. Drafting to protect the benefit position is a legitimate use of contractual freedom; drafting to get around the revocation period is not.

When is a non-compete clause valid?

A non-compete clause (concurrentiebeding) is valid only if it is agreed in writing with an adult employee. In a fixed-term contract it is also valid only if the employer sets out in the contract the compelling business interests that make it necessary.

These requirements follow from article 7:653 BW. Even a valid clause can be moderated or set aside by the court where the employee is unfairly disadvantaged compared with the interest the employer seeks to protect. Our article on non-compete clauses under Dutch employment law discusses how courts weigh that balance and what a defensible clause looks like today.

What can couples arrange in family agreements?

Couples can arrange their property relations largely as they wish, but only in the correct form. Maintenance for children cannot be contracted away, and a waiver of partner maintenance made before the marriage is void.

In family law party autonomy is real but limited, and the limits are drawn around children and around form. Spouses and registered partners can arrange their property relations largely as they wish, but only in a prenuptial or postnuptial agreement executed before a civil-law notary (notaris). An informal side letter between spouses about their matrimonial property regime has no effect.

For marriages entered into on or after 1 January 2018, the statutory default is a limited community of property. Under that regime, pre-marital assets, gifts and inheritances remain private. Couples who want the older full community of property, or complete separation, must say so in a notarial deed.

Can you waive maintenance by contract?

Maintenance is where mandatory law is at its firmest. Article 1:400 paragraph 2 BW provides that agreements in which a person waives maintenance owed under the law are null.

For children that is absolute. Parents cannot contract away the obligation to contribute to the costs of care and upbringing of their children. A clause that tries to do so has no effect, however carefully it was negotiated and whatever was given in return.

Between spouses the position is more nuanced. The law allows spouses to agree on maintenance in connection with a divorce, including an agreement that no maintenance will be paid. However, the Supreme Court (Hoge Raad) held on 25 November 2022 (ECLI:NL:HR:2022:1724) that a waiver of partner maintenance agreed before the marriage, for example in a prenuptial agreement, is null. The exception in article 1:158 BW only covers agreements made during the marriage.

What about unmarried cohabitants?

Unmarried cohabitants owe each other no statutory maintenance, so there is nothing to waive. This is regularly misunderstood.

Living together, even for decades and even with a notarial cohabitation agreement (samenlevingscontract), creates no statutory maintenance duty between the partners. A clause excluding partner maintenance in a cohabitation contract therefore adds nothing. What a cohabitation agreement can usefully do is regulate ownership of the home, the division of household costs, pension arrangements and what happens to jointly acquired assets on separation. The duty towards the children of the relationship exists independently of the relationship status of the parents. It is unaffected by whatever the parents have signed.

Can you choose a foreign law to escape Dutch mandatory rules?

You can choose a foreign law, but it will not remove every Dutch mandatory rule. The Rome I Regulation lets you choose the governing law, and then preserves specific mandatory rules for consumers, employees and public interests.

Within the European Union, the law applicable to contractual obligations in civil and commercial matters is determined by the Rome I Regulation. Its starting point is party autonomy. Under article 3, a contract is governed by the law chosen by the parties, whether or not that law has any connection with the transaction. A Dutch supplier and a German buyer may agree on Swiss law, and a Dutch court will apply it. The choice can be express or clearly demonstrated by the terms of the contract, and it can be limited to part of the contract.

Where does the choice of law stop?

Rome I sets out, in a small number of provisions, exactly where the choice stops. The most important are articles 3(3), 6 and 8.

• Purely domestic situations. Under article 3(3), where all other relevant elements are located in one country, a choice of foreign law cannot displace the provisions of that country that cannot be derogated from by agreement.
• Consumers. Under article 6, the choice of law may not deprive a consumer of the protection of the mandatory rules of the country where the consumer is habitually resident, where the trader directs its activities to that country.
• Employees. Article 8 does the same for individual employment contracts, measured against the law of the country in which or from which the employee habitually carries out the work.

Two further provisions apply regardless of the choice. Article 9 preserves overriding mandatory provisions (bepalingen van bijzonder dwingend recht): rules a state regards as crucial for safeguarding its public interests, such as its economic or social organisation. They apply whatever the governing law; sanctions legislation, competition law and certain rules on the transfer of undertakings work this way. Article 21 allows a court to refuse to apply a rule of the chosen law where the result would be manifestly incompatible with the public policy of the forum. Public policy in this sense is narrow. A Dutch court will not use it merely because Dutch law would have produced a friendlier outcome.

A typical, anonymised case shows how these provisions combine. A company established outside the Netherlands engages a sales representative who lives and works only in the Netherlands, and the contract states that the law of the company’s home country applies. When the relationship ends, the employer discovers that the choice of law is valid for much of the contract. It cannot, however, remove the protection the employee would have had under Dutch law: the requirement of prior permission from the UWV or the subdistrict court, the statutory notice period and the transition payment. The right planning question is therefore not which law is friendliest, but which mandatory rules will apply whatever you choose, and whether the commercial arrangement still works once those rules are added.

Does arbitration change the boundary?

Arbitration widens your freedom on procedure, but not on substance. The boundary is enforcement.

Arbitration is where party autonomy is at its widest. Dutch arbitration law, set out in Book 4 of the Code of Civil Procedure (Wetboek van Burgerlijke Rechtsvordering, Rv), lets the parties choose the arbitrators, the seat, the language, the procedural rules and the law applicable to the substance of the dispute. Dutch courts support that choice. However, an arbitral award can be set aside by the Court of Appeal on the limited grounds listed in article 1065 Rv. These include the absence of a valid arbitration agreement, a tribunal that failed to comply with its mandate and an award that conflicts with public policy. For foreign awards, the New York Convention allows enforcement to be refused where the award is contrary to the public policy of the enforcing state.

In practice, an award giving effect to a bribery or money laundering arrangement will not be enforced in the Netherlands, whichever law the parties selected. Arbitration also does not remove the protective jurisdiction rules for consumers and employees. Under article 6:236 sub n BW, an arbitration clause in consumer general terms is on the black list, unless the consumer is given at least one month, after the trader has invoked the clause in writing, to choose the ordinary court instead.

How do you draft an agreement that survives the test?

Treat mandatory law as part of the drafting, not as a final check. Start with three questions: who is the counterparty, what is the subject matter, and where will performance take place?

The identity of the counterparty decides whether the consumer regime, the reflex effect or the exclusion for large parties applies. The subject matter decides whether specific protective legislation is engaged, as it is for employment, tenancy, agency, consumer sale and financial services. The place of performance decides which mandatory rules will apply regardless of any choice of law.

Use conditional phrasing

Conditional phrasing is the single most effective technique. A clause that limits liability to the maximum extent permitted by applicable law, or that applies a restriction only in so far as mandatory rules do not provide otherwise, gives a court something to reduce rather than something to strike out. It also fits the conversion rule of article 3:42 BW. The opposite habit, drafting an absolute prohibition and hoping it will not be tested, produces the worst outcome: a void clause and no fallback.

Add a severability clause and a fallback ladder

Take the severability clause seriously without relying on it. Because article 3:41 BW already separates the valid part of an agreement from the invalid part, the value of the clause lies in what it adds. That is an express statement that the parties regard the provisions as separable, and a commitment to replace an invalid provision with a valid one that comes as close as possible to the original commercial intent. Add a fallback ladder to the clauses most likely to be attacked, such as a non-compete with a shorter alternative duration or a narrower geographic scope, so that the court has a lawful option in front of it.

Record how the terms were made available

Many Dutch disputes about general terms turn not on their content but on whether they were provided in time and in a usable form. Attach them to the offer, keep the version that applied on the date of contracting, and avoid referring to a website page that changes. The same applies to consumer information duties: the obligation to inform is mandatory, and evidence that you complied is worth more than the clause itself. Our overview of the main types of commercial agreement and our guidance on drafting commercial agreements set out the clauses that deserve this treatment.

In summary

• Most Dutch contract law is regulatory: you can agree otherwise, unless a mandatory rule, a formal requirement or reasonableness and fairness (article 6:248 BW) stands in the way.
• A clause that breaches mandatory law is void, or voidable if the rule protects one party only (article 3:40 BW); the rest of the contract usually survives (articles 3:41 and 3:42 BW).
• General terms, company law, employment law and family law each contain their own mandatory limits, such as the black and grey lists, article 2:25 BW, the dismissal rules and article 1:400 paragraph 2 BW.
• A choice of foreign law under Rome I does not remove the mandatory protection of consumers and employees, or overriding mandatory provisions.
• Conditional drafting, a severability clause with a fallback ladder and proof that terms were provided make an agreement much more resilient.

Frequently asked questions

Can we choose a foreign law to avoid Dutch dismissal rules?

No. A choice of foreign law in an employment contract is valid, but under article 8 of the Rome I Regulation it cannot deprive the employee of the protection of the mandatory provisions of the law that would have applied without the choice. For someone habitually working in the Netherlands, that is Dutch law. The requirement of prior permission from the UWV or the subdistrict court, the statutory notice periods, protection during illness and the transition payment continue to apply. The choice of law can still be effective for questions not covered by those protective rules.

If one clause is void, is the whole contract void?

Usually not. Article 3:41 BW keeps the rest of the agreement in force unless the invalid part is inseparably connected to it, given the content and purport of the contract. Dutch courts take that approach as a matter of course, and article 3:42 BW allows a defective clause to be converted into a valid one where the parties would evidently have wanted that. The exception is a contract whose very object is unlawful, or one where the void clause was the reason for entering into the agreement at all. In that case, nullity can extend to the whole contract.

Is a waiver of partner maintenance in a cohabitation contract enforceable?

The question rarely arises in the way people expect, because unmarried cohabitants owe each other no maintenance under Dutch law in the first place. A waiver in a cohabitation contract therefore has little to waive. Where partners have agreed by contract to pay each other something on separation, that obligation is in principle binding. A court will set it aside only where holding a party to it would be unacceptable by standards of reasonableness and fairness. For spouses and registered partners the position differs: a waiver agreed before the marriage is null under article 1:400 paragraph 2 BW.

Can a business buyer waive consumer protection in an international sales contract?

Between genuine businesses, largely yes: the consumer regime of Book 6 and Book 7 BW does not apply, and the parties can allocate risk as they see fit. Two qualifications matter. A small business contracting outside its normal field of activity may benefit from the reflex effect, so that the standards of the black and grey lists influence the assessment even though the lists do not apply directly. And where the contract is international, the mandatory rules preserved by the Rome I Regulation and any overriding mandatory provisions of the country of performance apply regardless of what the parties agreed.

How do I tell whether a provision is mandatory?

You read the statute in context rather than looking for a label. Book 2 BW is mandatory unless it states otherwise. In Book 7 BW, the protective titles on employment, tenancy, agency and consumer sale contain express provisions stating from which articles no deviation is possible, and whether deviation is nevertheless allowed by collective labour agreement. Where the statute is silent, the character of the rule follows from its purpose. A provision that exists to protect one identifiable weaker party is normally mandatory in favour of that party and leads to voidability rather than nullity.

Who can help us check our agreements?

We advise businesses and private clients on exactly this boundary, from general terms and shareholders agreements to employment documentation, prenuptial agreements and cross-border contracts. If you want to know whether a clause you rely on would hold up before a Dutch court, or you are drafting an agreement with an international element, we can review it and set out your options.

Unsure where you stand? Tell us about your situation. We will let you know your options within one working day.

How Law & More can help you with this is explained on our civil lawyer page.