The Mexican currency is the peso (MXN). Normally, $1 USD = 20 pesos approx. Most businesses in Tulum will manage their own rate which can average from 18-19 MXN per US dollar. It’s a good idea to get some Mexican pesos from an ATM (bring a debit card for this) after arrival to pay for tips, budget meals, bus tickets, small souvenirs, and taxis. Credit cards are accepted in most restaurants, bars, and businesses.