Where party autonomy meets mandatory law in Dutch contracts

Party autonomy is the freedom of contracting parties under Dutch law to decide for themselves whether to contract, with whom and on what terms; mandatory law (dwingend recht) is the body of statutory rules they cannot set aside by agreement. The two meet in every Dutch contract: the agreement governs, except where a mandatory provision says otherwise, in which case the offending clause is void or voidable and the statutory rule applies instead. Knowing exactly where that line runs is what separates an enforceable contract from an expensive one.

What party autonomy actually covers in Dutch law

Dutch contract law starts from the assumption that parties are the best judges of their own interests. Book 6 of the Dutch Civil Code (Burgerlijk Wetboek, BW) contains a large number of rules on offer and acceptance, performance, default and damages, but 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, and why sophisticated parties routinely do so.

Freedom of contract in the Netherlands has three separate components, and it is worth keeping them apart. There is freedom to contract at all, which means that in principle nobody can be forced into an agreement and that negotiations can be broken off, subject to the duty of good faith in the pre-contractual phase. There is freedom to choose a counterparty, which is limited mainly by equal treatment legislation and by competition law. And there is freedom of content, the freedom to determine what the contract says, which is the freedom that mandatory law most often restricts.

Dutch law also 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 genuine 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 consumer guarantee or 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.

Underneath all of this sits a rule that is easy to overlook. Article 6:248 BW provides that a contract has not only the effects the parties agreed, but also those that follow from good faith and reasonableness (redelijkheid en billijkheid), and that a contractual rule does not apply if, in the circumstances, applying it would be unacceptable by those standards. That 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. For a broader treatment of the system as a whole, see our guide to contract law in the Netherlands.

What makes a rule mandatory, and what happens if you breach one

A provision is mandatory when the law does not allow parties to depart from it. Dutch legislation rarely labels its provisions as such in so many words; you establish the character of a rule from the statute itself, from the chapter it sits in and from its protective purpose. Book 2 BW is the clearest case. Article 2:25 BW states that its provisions may be departed from only in so far as the law itself allows, which 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, and in tenancy law whole sections are declared binding in favour of the tenant.

Dutch law also recognises an intermediate category that has no real equivalent in common law systems: three-quarters mandatory law (driekwartdwingend recht). Here the parties to an individual contract cannot deviate, but a collective labour agreement (CAO) can. Several important employment rules work this way, including parts of the regime on successive fixed-term contracts. The practical consequence is that the same clause can be void in one company and perfectly 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, voidable, and why the difference matters

The sanction is set out in article 3:40 BW. A legal act with content or purport 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 likewise null, unless the provision is intended solely to protect one of the parties, in which case the act is voidable (vernietigbaar). Voidable means the protected party may invoke the defect, in court or by an out-of-court declaration, and until it does 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.

A second provision saves more contracts than any drafting technique. Article 3:41 BW provides that where a ground of nullity concerns only part of a legal act, the remainder stays in force in so far as it is not, given the content and purport of the act, inseparably connected to the invalid part. 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, for example, may be reduced to the maximum the law permits rather than struck out entirely, which is precisely why conditional drafting is worth the effort.

Party autonomy and mandatory law compared

The two forces are easiest to hold in mind side by side. The table below sets out how they differ in source, effect and reach, and it 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.

Commercial contracts: general terms and conditions

General terms and conditions are the area of Dutch commercial practice where mandatory law bites hardest, because the rules in articles 6:231 to 6:247 BW govern not only what the terms say but whether they became part of the contract at all. Two obligations run in parallel. The user of the terms must give the counterparty a reasonable opportunity to take note of them before or at the moment of contracting, normally by handing them over or sending them with the offer, and the individual clauses must not be unreasonably onerous. Fail the first test and the clause can be annulled without any discussion of its content.

For contracts with consumers the Civil Code adds two catalogues that decide the outcome in advance. Article 6:236 BW contains the black list (zwarte lijst): clauses that are always regarded as unreasonably onerous and can always be annulled, such as a term that excludes the consumer right to dissolve the contract, or one that gives the trader an unreasonably long period to perform. Article 6:237 BW contains the grey list (grijze lijst): clauses presumed to be unreasonably onerous, which shifts the burden of proof to the trader, and which covers familiar drafting habits such as a unilateral right to change the price or the performance, or a term that materially limits the liability of the trader.

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 at all, 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 materially 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 a single 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.

Battle of forms is the other recurring point. Where both parties refer to their own terms, article 6:225 BW gives priority to the set referred to first, unless the second party expressly rejects the first set. Express rejection has to be explicit and specific; a standard sentence buried in the reply is regularly held insufficient. This is one of the few places where an ordinary purchase order genuinely decides a liability cap worth millions.

Company law: less freedom than a shareholders agreement suggests

In company law the default is reversed. 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 bind, and the articles of association can depart from them only where the legislator has expressly created that possibility. The 2012 flexibilisation of BV law widened those possibilities considerably, allowing 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.

A shareholders agreement (aandeelhoudersovereenkomst) is a contract, and between the shareholders it is binding like any other contract. What it cannot do is change the company. An obligation in a shareholders agreement to vote in a particular way binds the shareholder personally, but a resolution adopted in breach of it is not automatically invalid, and a third party acquiring shares without becoming a party to the agreement is not bound by it. Where the 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.

Three mandatory limits recur in practice. Directors owe a duty of proper performance of their task to the company under article 2:9 BW, and 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 actually see from the accounts and the information provided. The relationship between the company and everyone involved in its organisation is governed by article 2:8 BW, which requires them to behave towards one another according to standards of reasonableness and fairness, and which is the principal legal basis on which a majority shareholder can be held to account for pushing a decision through. And the capital protection and creditor protection rules, including the distribution test that 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, although it can regulate how and when the parties will attempt 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.

An example makes the boundary concrete. Suppose two founders of a BV agree that no new shares will be issued for five years under any circumstances, in order to protect their stakes against dilution. A year later the company is close to insolvency and an investor is prepared 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, and a court asked to enforce the clause by injunction can refuse to do so where enforcement would push the company into bankruptcy. Freedom of contract survives; the remedy is money between the founders, not a veto over the survival of the company.

Employment contracts: the floor you cannot go below

Dutch employment law is built on mandatory and three-quarters mandatory provisions, and an employment contract that falls below them 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 and cannot be bought off during the employment relationship, although accrued days above the statutory minimum can be.

Dismissal is the clearest illustration. An employer cannot design its own termination procedure. Outside probation, summary dismissal and mutual consent, ending an open-ended contract requires either permission from the UWV, for redundancy and long-term incapacity, or a decision of the subdistrict court (kantonrechter) on one of the statutory grounds, for 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 annually by the Ministry of Social Affairs and Employment and published in the Government Gazette, which is why any figure written into a template dates quickly.

The alternative that most Dutch employment relationships end with, the settlement agreement (vaststellingsovereenkomst), shows how party autonomy and mandatory law can be reconciled rather than opposed. Because the parties agree to terminate by mutual consent, the statutory dismissal grounds do not have to be proved. Mandatory law nevertheless remains present in the background: the employee has a statutory period of two weeks to revoke consent, three weeks if the right of revocation was not mentioned in the agreement, and the wording of the agreement determines whether unemployment benefit is at risk. Drafting to protect the benefit position is a legitimate use of contractual freedom; drafting to circumvent the revocation period is not.

Restrictive covenants sit on the same line. A non-compete clause (concurrentiebeding) is valid only if it is agreed in writing with an adult employee, and in a fixed-term contract only if the employer sets out in the contract itself the compelling business interests that make it necessary. Even a valid clause can be moderated or set aside by the court where the employee is unfairly prejudiced in relation to 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.

Family agreements: what couples can and cannot arrange

In family law party autonomy is real but bounded, and the boundaries 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. Since 1 January 2018 the statutory default for marriages entered into on or after that date is a limited community of property, under which pre-marital assets, gifts and inheritances remain private, so couples who want the older full community, or complete separation, must say so in a notarial deed.

Maintenance is where mandatory law is at its firmest. Article 1:400 paragraph 2 BW provides that agreements in which a person waives the 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, and a clause purporting to do so has no effect regardless of how carefully it was negotiated or what was given in return. Between spouses the position is more nuanced. The law does allow spouses to agree on maintenance in connection with a divorce, including an agreement that no maintenance will be paid, but the Supreme Court has held that a clause in a prenuptial agreement waiving future partner maintenance, made long before any divorce was in view, is null.

Unmarried cohabitants are in a different position again, and 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. There is consequently nothing to waive, and a clause excluding partner maintenance in a cohabitation contract 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, by contrast, exists independently of the relationship status of the parents and is untouched by whatever the parents have signed.

Cross-border contracts: choosing a law and the limits of that choice

For contractual obligations in civil and commercial matters, the applicable law within the European Union is determined by the Rome I Regulation, and 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.

Rome I then sets out, in a small number of provisions, exactly where the choice stops. Article 3 paragraph 3 provides that where all other elements relevant to the situation are located in one country, the choice of a foreign law cannot displace the provisions of that country which cannot be derogated from by agreement. Article 6 protects consumers: 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 there. 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 operate independently of the choice altogether. Article 9 preserves overriding mandatory provisions (bepalingen van bijzonder dwingend recht), the rules a state regards as crucial for safeguarding its public interests such as its economic or social organisation, which apply irrespective of 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, and a Dutch court will not use it merely because Dutch law would have produced a friendlier outcome.

The classic case shows how these provisions combine. A company established outside the Netherlands engages a sales representative who lives and works exclusively in the Netherlands, and the contract states that the law of the home country of the company applies. When the relationship ends, the employer discovers that the choice of law is valid for much of the contract but cannot 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 correct planning question at the drafting stage is not which law is friendliest, but which mandatory rules will apply whatever the parties choose, and whether the commercial arrangement still works once those rules are added.

Arbitration and the same boundary

Arbitration is where party autonomy is at its widest. Dutch arbitration law, set out in Book 4 of the Code of Civil Procedure (Rv), lets the parties choose the arbitrators, the seat, the language, the procedural rules and the law applicable to the substance of the dispute, and Dutch courts are supportive of that choice. The boundary is enforcement. An arbitral award can be set aside by the Court of Appeal on the limited grounds listed in article 1065 Rv, which 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.

What this means in practice is that arbitration widens contractual freedom on procedure without extending it to substance. An award giving effect to a bribery or money laundering arrangement will not be enforced in the Netherlands, no matter which law the parties selected. Equally, arbitration does not remove the protective jurisdiction rules for consumers and employees, and an arbitration clause in consumer general terms is on the black list of article 6:236 BW unless the consumer is given a period of at least one month, after the trader invokes it, to choose the ordinary court instead.

Drafting agreements that survive the test

Compliance with mandatory law is a drafting discipline rather than a final check, and it starts with three questions that determine everything else: 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 irrespective of any choice of law.

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, and it 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.

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: 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 clauses that are 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.

Finally, record how the terms were made available. A large share of Dutch disputes about general terms turns 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.

Common 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, which for someone habitually working in the Netherlands 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 that are 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; there, nullity can extend to the whole.

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 contractually agreed to pay each other something on separation, that contractual obligation is in principle binding, and 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, and a waiver made outside the context of a divorce is null under article 1:400 paragraph 2 BW.

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

Between genuine businesses, yes to a large extent: 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 produces voidability rather than nullity.

At Law and More 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 survive a Dutch court, or you are drafting an agreement with an international element, our lawyers are available to review it and to set out the options. Contact us to discuss your agreement.