What to do if you receive a CAK letter or fine
Receiving a letter from the CAK (Centraal Administratie Kantoor) means the Dutch government believes you live or work in the Netherlands without valid Dutch health insurance (basisverzekering). From the moment the letter arrives, a three-month countdown starts. Within that time, you must either take out Dutch insurance or prove you’re exempt.
Option 1: Take a basiszorgverzekering immediately
Doing this within the three-month window stops the CAK process and prevents fines. Once you’re insured, your health insurer automatically notifies the CAK, and your case is closed.
If you don’t act, the CAK will continue the procedure, first issuing fines, and eventually assigning you to a health insurer under the Regeling Onverzekerden (Uninsured Persons Regulation).
Option 2: You think you are exempt
If you believe you’re not required to have Dutch health insurance (for example, if you’re only studying and not working), you can ask the SVB (Sociale Verzekeringsbank) to check your situation. You do this by submitting a Wlz insurance position assessment (Wlz-verzekeringstoets) on the SVB website.
The SVB determines whether you fall under the Dutch long-term care insurance law (Wlz), the key factor that decides if you must have Dutch health insurance (basisverzekering). Once you submit your request, the SVB automatically notifies the CAK that your assessment is in progress.
If the SVB confirms you are not insured under the Wlz
This means you are not obligated to take out Dutch basic health insurance. Once the SVB issues this decision, you should forward it to the CAK. The CAK will then close your case, cancel any pending fines, and you won’t need to pay or take further action.
If the SVB confirms you are insured under the Wlz
This means you are required to take out Dutch basic health insurance. In this case, you must arrange a basisverzekering immediately with any Dutch health insurer.
If you don’t take out insurance within the three-month window after receiving the CAK letter, the CAK will continue its process and you’ll:
- Receive a first fine,
- Then a second fine if you still don’t act
- And eventually be automatically assigned to a health insurer and charged an administrative premium for 12 months.
Option 3: You do nothing
If the government’s systems detect that you live or work in the Netherlands without valid Dutch basic health insurance (basisverzekering), the CAK (Centraal Administratie Kantoor) will send you a letter.
From that date, a three-month countdown begins. Within those three months, you must either take out Dutch health insurance or prove that you’re exempt (for example, through an SVB Wlz insurance position assessment).
If you do nothing, you’ll receive a fine. This rule and timeline are clearly stated on both Rijksoverheid and CAK’s official pages.