Money & costs
The Marshall Islands' currency is the US dollar (for exchange rates, see the Quick Reference page). Credit cards are increasingly accepted on Majuro but have limited use elsewhere except on Ebeye, where you should expect a surcharge. Come with US dollars or travellers cheques if you can - banks are not happy changing other currencies, and if they do the rates are often poor. ATMs are available only on Majuro, and they're not always working.
Tipping is customary in the few 'top-end' restaurants but not elsewhere.