For every rental, SnappCar charges a Snapp- and an insurance fee. The insurance fee is 10% of your daily price with a minimum fee of €4,50 in the Netherlands, and €6,23 in Germany. This ensures your full casco insurance and means that you pay the deductible if you leave the car with a damage that is covered by the insurance policy.
You can find the local insurance policies here:
Insurance policy the Netherlands