How much spending money you need for Thailand depends on whether you are backpacking, travelling with family or a luxury tour of Thailand. $40 per day should cover the backpacking budget, $150 per day should cover a family and $200 upwards for luxury travel around Thailand.
You can carry an unlimited amount of foreign currency to Thailand and if you arrive with more than USD20,000 you need to declare it to customs. According to the Thai Embassy you can bring in less than THB50,000 to Thailand.
No you can not use dollars in Thailand, you need to use the currency of Thailand, Thai baht. The Thai baht has 5 notes for the 20 baht, 50 baht, 100 baht, 500 baht and 1000 baht notes. The most common coins in Thailand are the 1 baht, 2 baht, 5 baht, and 10 baht.
A travel money card is better for security than cash. If you lose your travel money card, you can report it stolen or lost quickly online and the card is cancelled to prevent unauthorised spending. You also need a 4 digit pin to spend money on your travel money card. If you lose cash you are unlikely to recover it.
Yes you should exchange money for Thai baht before you travel to Thailand. Many places in Thailand accept cash and it’s handy to have Thai baht for corner stores, local markets, transport or for tipping.
Yes you can use a travel card in Thailand. You can use a debit travel card, prepaid travel card or credit card. Most travel cards are either Mastercard or Visa which means they are accepted in most places within Thailand.