Panama uses the US dollar as its currency. The official name for it is the balboa, but it’s exactly the same bill, and in practice people use the terms dólar and balboa interchangeably. Panamanian coins are of the same value, size and metal as US coins, though both are frequently used. Coins include one, five, 10, 25 and 50 centavos (or centésimos) – 100 centavos equal one balboa. Most businesses won’t break US$50 and US$100 bills, and those that do may require you to present your passport.
Restaurants Tipping should be 10%; check to see if it's included in the bill.
Taxis Tipping is optional, but you can round up a dollar or two, especially at night.
Guides It is customary to tip US$1 to US$2 per person for day tours, with more substantial tips (from US$10 per day) for naturalist guides.