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Healthcare

The 4-month insurance clock, and the trap that forces a 120% premium if you are late

Once your insurance obligation starts (residence permit + BRP registration, or you start working/living here), you must take a Dutch basic health insurance within 4 months. It back-dates to the day the obligation began, so being late buys you nothing and risks fines: the CAK sends warnings, then two fines, then enrolls you itself at 120% of the standard premium docked from your wages. All insurers must accept you for the basic package with no health questions. (International students on foreign insurance are often exempt - check first.)