Dutch health insurance: the 4-month rule
If you become required to have Dutch basic health insurance, you should arrange it as soon as possible. The four-month period affects whether coverage and premiums are backdated.
Independent Information
Expat Holland is an independent, informative platform. We aim to educate expats on the Dutch healthcare system. We do not provide personal financial or medical advice, and our comparisons are purely objective. Always consult the official policy documents of a provider before making a decision.
Quick answer
If Dutch basic insurance is compulsory for you: arrange it as quickly as possible and within four months of the date your insurance obligation starts.
Within four months: the policy can start from the date your obligation began, so premiums are also due from that date.
After four months: the policy is generally not backdated. Care received during the uninsured period may therefore remain at your own expense.
Unsure whether you are required to insure? Your Wlz insurance position matters. The SVB can formally assess this.
Who needs Dutch basic health insurance?
People who live or work in the Netherlands are generally required to have Dutch basic health insurance when they are insured under the Dutch Long-term Care Act (Wlz). Registration with a municipality is relevant, but registration by itself does not decide your Wlz insurance position.
The government defines what the basic package covers, but insurers can still differ in premium, contracted healthcare providers, service, policy type and reimbursement rules for non-contracted care.
How the 4-month rule works
Government guidance says newcomers who come to live or work in the Netherlands should arrange Dutch health insurance as quickly as possible and no later than four months after arrival. Your actual insurance start date can depend on your circumstances, including when a residence permit comes into force or when your insurance obligation begins.
If you arrange the policy within the allowed period, coverage starts from the date your obligation began. You then owe premiums from that same date, and eligible healthcare costs from the covered period can be claimed under the policy terms.
What happens if you arrange it after 4 months?
If you take out Dutch health insurance after the four-month period, it is generally not backdated. You pay premiums from the date the policy starts, but healthcare costs from the earlier uninsured period are not retrospectively covered.
Received a CAK letter? Follow the deadline in that letter. If you believe you are not required to have Dutch insurance, the CAK and SVB provide routes to have your insurance position checked instead of simply ignoring the notice.
Contracted vs non-contracted care
The Dutch basic package is set nationally, but how much you are reimbursed can still depend on the policy and whether your healthcare provider has a contract with your insurer.
- Contracted care: reimbursement follows the insurer's agreement with that healthcare provider and the terms of your policy. The mandatory deductible and any applicable statutory personal contribution can still apply.
- Non-contracted care: some policies reimburse less when you use a provider without a contract. The exact reimbursement must be stated in the policy.
If access to particular hospitals, therapists or other providers matters to you, check both the provider network and the reimbursement rules before choosing a policy.
When your situation may differ
The simple “move to the Netherlands, then insure within four months” rule does not cover every international situation. Examples where the answer can differ include:
- International students: if you came solely to study, you will normally not automatically be insured under the Wlz. Paid work or a paid internship can change that. Compare student insurance routes and private cover.
- Posted and cross-border workers: social-security rules can keep you insured in another country or change which country is responsible.
- Short stays: staying or registering in the Netherlands does not automatically mean you are insured under the Wlz.
- Residence-permit situations: the date your permit comes into force can affect when Dutch insurance must start.
If your situation is unclear, request an SVB assessment of your Wlz insurance position. That is the formal route for determining whether you are subject to compulsory Dutch basic health insurance.