The official currency of the United States is the US dollar, which is used throughout Las Vegas. It's a good idea to carry cash with you, especially for small purchases like tips and vending machines.
Most businesses in Las Vegas accept credit and debit cards, including Visa, Mastercard, American Express, and Discover. However, it's always a good idea to carry some cash with you in case of any issues with card acceptance.
In the United States, sales tax is added to most purchases, including food, drinks, and souvenirs. The tax rate in Las Vegas is currently 8.38%.
Tipping is a common practice in Las Vegas, and it's customary to tip service workers such as bartenders, servers, and housekeeping staff. A general rule of thumb is to tip around 15-20% of the total bill.