Currency The Tongan pa’anga (T$) comes in one, two, five, 10, 20 and 50 pa’anga notes, and coins in denominations of one, five, 10, 20 and 50 seniti.
Cash is king in Tonga (dig the new plastc notes to celebrate King Tupou VI's coronation): be sure to take plenty with you to Ha’apai and ‘Eua which are ATM-free. There are ATMs, however, in Tongatapu and Vava’u, and it’s easy to change major currencies at local banks.
Credit cards are accepted at many tourist facilities but often attract a 4% to 5% transactions fee. Visa and MasterCard are the most common.
Tongans don’t expect tips but you won’t cause offence by rewarding good service with a few pa’anga.