Client Contract – Why You Need One and What to Include

Article created in cooperation with the LexQuire law firm.

Many entrepreneurs in the Netherlands start working with clients without a written contract because they trust that things will “work themselves out.” However, agreements made only verbally often lead to disputes about deadlines, payments, or the scope of work. If this sounds familiar, the solution is simple: a clear contract.

A well-written contract is not a sign of distrust. Instead, it shows professionalism and protects both sides. As the experts at LexQuire point out, a contract is not a pointless formality. It is an investment in the safety of your business.

“A contract helps you clearly define the rules of cooperation and avoid misunderstandings. It is not about legal tricks but about knowing what to expect.” – LexQuire

Why you should always use a contract

Trust is important in business, but it is not a substitute for clear terms. As long as everything goes well, the lack of a contract may not seem like a problem. However, when something goes wrong, the situation changes quickly.

Three key reasons to put agreements in writing

1. Clarity and certainty
A good contract defines the scope of work, deadlines, payment terms, and responsibilities. This prevents confusion later. It also protects you when a small misunderstanding becomes a real dispute.

Example: A client asks for “minor changes,” but then sends 30 revisions. Without a clear limit written in the contract, you may end up working for free.

2. Protection of your cash flow
Without a contract, clients may delay payments or change expectations during the project. A written agreement sets deadlines for payment, explains what happens in case of delays, and helps you react when the conditions change.

3. Professionalism and trust
A contract shows that you take your work seriously. It builds credibility and allows both sides to cooperate without stress or doubt.

What should a client contract include?

Many entrepreneurs sign contracts quickly because they want to start the job as soon as possible. However, small details determine who is legally protected. Because of this, it is worth reading these parts very carefully.

1. Scope of work – what exactly will you deliver?

Describe your work precisely.
Instead of a general phrase such as “construction service”, write:

“Assembly of a wooden pergola (4m × 6m), including ground preparation, delivery of materials, and finishing according to the project dated 12.05.2025.”

You can also describe what is not included, for example:
“This contract does not include electrical installation or landscaping work.”

Every detail limits the risk of conflict.

2. Deadlines – clear and realistic

If the client provides materials late but still expects the original deadline, problems will appear. Add a clause stating that the deadline is extended by the number of days of delay caused by the client.

3. Payment and invoicing

Check when the client must pay and in what form. Many contracts say “payment after approval.” Without clear criteria, the client may delay approval forever. Therefore, specify how long they have to approve the work and what conditions must be met.

4. Copyright and ownership

Creative and IT work requires special attention. Ensure that copyright is transferred only after payment, not before. Some contracts require this at the moment of signing, which is risky.

5. Liability

Check whether the contract puts all responsibility on you. Ideally, liability should be limited, for example, to the value of your fee. The contract should also focus only on situations you can control.

6. One-sided rights for the client

If the client may change the scope, deadlines, or price without your approval, consider this a red flag. All changes should require your consent and possibly an extra fee.

7. Ending the contract

Both sides should have the right to terminate the agreement under fair conditions. Avoid clauses such as “the client may terminate the contract at any time without explanation.” Instead, ask for a notice period or clear reasons for termination.

Is an email legally binding? What about a quote?

Not every cooperation starts with a signed document. Under Dutch law, the following can be binding:

a quote clearly accepted by email,
written confirmation of the agreed terms,
email communication stating the scope and price.

This is especially important for ZZP freelancers who often work fast: “I send a quote — the client confirms — and I start.”

“A quote accepted clearly by email is legally binding. It can serve as evidence just like a signed contract.” – LexQuire

The QUOTE function in eFaktura.nl helps you create structured and professional quotes. Once the client accepts the quote by email, you have clear proof of the agreement.

Read how to use a quote to protect your business HERE.