Yes, there is a levy involved! From what I've heard, the work permit application itself costs around $30-$35, and on top of that, you'll need to pay a monthly levy, roughly $60 per month if your baby is a Singapore citizen, but it jumps to around $300 per month if the baby isn't one, so that's a significant difference worth checking on. The levy works out to roughly $5 a day, so for a standard 28-day confinement it adds up but is still manageable. Just note that as the employer, it's typically your responsibility to apply for the work permit through MOM, not the nanny's, so factor in a bit of admin time before she arrives.