Everything about hiring a private detective in Belgium in 2026. From legal framework to costs and tips. Read the guide by Grey Investigations.
Are you considering hiring a private detective? Whether it's suspected fraud, a missing person, or gathering evidence for a court case, a professional investigation can bring clarity. In Belgium, the profession is strictly regulated by the law of 18 May 2024 on private investigation. This law protects both your rights and the quality of the investigation. In this guide, we explain step by step how to hire a detective, what to expect, and what to look out for.
People often think of private detectives as shadowing and chasing, but the reality is much broader. You can hire a detective for a wide range of matters: suspected infidelity, fraud investigation within a company, locating a missing family member, or gathering evidence for divorce proceedings. Lawyers and bailiffs also regularly use our services to locate witnesses or establish false self-employment.
The most important thing is that you have a valid reason. A detective cannot simply spy on anyone. The law of 18 May 2024 requires that every investigation serves a legitimate purpose, such as protecting your rights or preventing harm. Not sure if your situation qualifies? Contact us discreetly for an initial analysis. At Grey Investigations, we are happy to help, whether you live in Ghent, Gavere, or elsewhere in Flanders.
Since the entry into force of the law of 18 May 2024, the landscape of private investigation has been thoroughly redrawn. Every private detective must have a prior, written assignment from the client. This assignment must be clearly defined and may only relate to facts that constitute or threaten to constitute an infringement, or to gathering evidence in the context of legal proceedings.
The law also imposes strict limits on investigative methods. For example, a detective may not place listening devices, record private conversations without consent, or access bank data or telephone traffic. Observations on public roads and consulting public sources are allowed. In addition, every detective must be registered with the Federal Public Service Home Affairs and have an identification card. Always ask for this at first contact.
As an experienced detective agency, we work strictly according to these rules. Your privacy and that of the person under investigation are respected to the maximum. This way, we avoid evidence becoming unusable in court.
An investigation always starts with an intake interview. This can be by phone, email, or preferably in person at our office. You tell us what is going on and what goal you have in mind. Based on that, we draw up a plan of action and a cost estimate. Once you agree, we sign a written assignment agreement, as required by law.
During the investigation, we keep you regularly informed of progress without compromising discretion. We use modern techniques such as GPS tracking (with legal permission), observation, and data analysis. At the end, you receive a detailed final report with photos, videos, and a chronological account. This report can serve as evidence in legal proceedings.
The turnaround time varies from a few days to weeks, depending on the complexity. A simple observation in Sint-Laureins takes less time than an extensive fraud investigation in a company in Evergem. We always ensure realistic planning and clear communication.
The cost of a private detective depends on several factors: the nature of the assignment, the duration, the number of investigators deployed, and any additional costs such as travel. At Grey Investigations, we work with transparent hourly rates and provide a clear quote in advance. That way, you never face surprises.
On average, you can expect an hourly rate between 75 and 120 euros, excluding VAT. Some simple assignments, such as an address investigation in Zwijndrecht, can be handled with a fixed fee. For long-term observations or complex fraud cases in Zwevegem, we prepare a detailed estimate. Feel free to discuss your budget during the intake interview; we are happy to think along about a feasible approach.
Note: hiring a private detective is not cheap, but the investment can pay off in peace of mind, prevented damage, or a strong legal position. Always ask for a written agreement with clear rate arrangements.
Not every agency is equally reliable. Always check whether the detective has a valid license from the FPS Home Affairs. Ask for references and see if the agency is affiliated with a professional association such as the Professional Association of Private Detectives (BVPD). A professional agency like Grey Investigations has the necessary insurance and works according to strict ethical codes.
Also pay attention to specialization. Some detectives focus on family matters, others on corporate fraud or forensic investigation. Choose an agency that has experience with your type of problem. Whether you are looking for a detective in Lendelede, Sint-Gillis-Waas, or beyond, we offer local expertise with the same high standards.
Finally, be wary of promises that sound too good to be true. A serious detective never guarantees a result, but does guarantee a discreet and lawful approach. When in doubt, you can always request a no-obligation conversation.
Check out our other guides or ask for no-obligation advice.
