That's way too broad of a question. Some families pay for their nannies policy whereas others give a health insurance contribution each month per the nannies choice. Policies can range from $150-600 a month depending on the policy and coverage. In my ten years of nannying, I've never had a family pay for my health insurance. Frankly, I wouldn't want them to because I'd be getting a crap policy with extremely high copayments.