The currency of Belize is the Belize dollar (BZ$ or BZD). It’s tied to the US dollar at a fixed rate of 1US$ to 2BZ$. In conversation, most people refer to the US currency as dollars, and local currency as Belize. If only a dollar sign is used on prices, check first if it’s US dollars or Belize dollars.
You’ll find ATMs in all cities and larger towns, and credit cards are widely accepted in hotels, and in larger restaurants and stores.
In general, Belize is more expensive than other Central American countries with prices around the same as in the US. US dollars are fairly readily accepted but carry smaller denominations ($20 or less) and make sure notes aren’t damaged.