The Malaysian currency is the ringgit, informally known as the dollar and abbreviated RM or MYR, is divided into 100 sen. There are coins of 5, 10, 20 and 50 sen as well as bills of RM1, 2(rare), 5, 10, 20, 50 and 100. Banks and airports are not the best places to exchange money if it's not urgent. Licensed money changers in major shopping malls often have the best rates. ATMs are widely available in cities, and credit cards can be used in most shops, restaurants and hotels.
Tipping is not customary in Malaysia. However, hotel porters and taxi drivers will appreciate a small tip if you have been provided with exemplary service. Most expensive restaurants, bars and hotels may indicate prices consist with sales tax (6%) and service charge (10%) will be added to the bill, hotel tax of 5% may also be added to this.
No tax refund for shopping in Malaysia. For international flights, airport departure tax is RM40 per person, and for domestic flights, it is RM5. Only children below 2 years old are exempted.