What a resort fee is
A resort fee is a mandatory nightly charge, separate from your room rate, that most Las Vegas hotels apply automatically — you can't opt out of it even if you don't use any of what it nominally covers. It's typically billed per room, per night, and settled at checkout.
What it usually covers
Coverage varies by property but commonly bundles in-room Wi-Fi, gym or pool access, and sometimes local and toll-free calls or streaming access. In practice, most guests treat it simply as a mandatory add-on to the room rate rather than a service they're actively choosing.
How to budget for it
When comparing room rates between hotels, add the nightly resort fee (plus tax on top of that) before you compare — a cheaper headline rate can end up costing more than a pricier one once fees are included. Resort fee amounts and what they cover can change, so check the specific hotel's current policy when you book rather than assuming last year's number.