It is advisable to bring small bills ($1, $5, $10, $20) since larger bills can be difficult to change. Entrance fees and camping fees may also be paid with major credit cards or traveler's check. Most stores accept major credit cards and traveler's checks.

The nearest bank is located in Study Butte, 26 miles west of park headquarters. ATMs are located at the Chisos Mountains Lodge and Rio Grande Village Store inside the park, and outside the park in Study Butte.