Thailand's currency is the baht, which is divided into 100 satang. The exchange rate is listed daily (except Monday) in the business sections of the Bangkok Post and Nation newspapers.
Banknotes are issued in denominations of 10 baht (brown, but gradually being withdrawn in favour of coins), 20 baht (green), 50 baht (blue), 100 baht (red), 500 baht (purple) and 1000 baht (grey). Coins in circulation are 25 satang and 50 satang (bronze) and 1 baht, 5 baht and 10 baht (silver). To confuse matters, 1 baht coins come in three different sizes.
Internationally recognised credit cards are widely accepted. Banking services are provided nationwide by Thai banks (Bangkok Bank and Thai Farmers Bank are the two largest financial institutions) and branches of some foreign banks: hours are Monday to Friday 09:00-15:30. There are also authorised currency exchange counters in tourist areas. Hotel cashiers will change money but usually at a poorer rate than given by banks.
All major shopping centers have bank branches that are open Mon-Sun 10:00-20:00. Branches you can usually find is Siam Comercial Bank (SCB), Bangkok Bank, Thai Farmers Bank. ATM (Cash Machines) is widely available 24 hours and accept all major credit cards, such as VISA, MasterCard, etc.
Tipping is not a common practice outside major hotels and restaurants.