New Indonesian visa regulations were introduced in 2004, effective 1st February. There are currently three different visas available for tourists visiting Indonesia

free VISA on arival
Upon arrival in Indonesia and presentation of a passport with at least 6 months validity remaining, citizens from the following countries are eligible for a free 30 day stay permit; Brunei Darussalam, Singapore, Thailand, Malaysia, Philippines, Hong Kong SAR, Macau SAR, Chile, Peru, Morocco and Vietnam.

purchased VISA on arival
Meanwhile, Upon arrival in Bali and presentation of a passport with at least 6 months validity, citizens from the following countries can purchase either a 3 is US$10 or 30 day non-extendable stay permit costs 25 $ US (up to 30 days).

For, Canada, USA, Argentina, Brazil, Denmark, Finland, France, Germany, Hungary, Italy, Japan, Taiwan, Australia, New Zealand, Norway, Poland, South Africa, South Korea, Switzerland, United Kingdom and United Arab Emirates, it will always takes sometimes on queuing to get a visa on arrival at the airport with this new regulation consequently to obtain the visa in your own country from an Indonesian consulate before having your Bali trip

pre-arranged VISA
Citizens from countries not mentioned above must apply for a visa prior to arriving in Indonesia.

customs
The validity of passport must be for at least 6 months after the date of arrival and having at least one empty page to be stamped upon arrival is an obligation. A white embarkation/disembarkation card to fill out will be given, Keep it with your passport and must present it again as you leaving the country. The allowance standard of duty-free is: 50 cigars, 100 grams of tobacco, 200 cigarettes or 2 liters of alcoholic beverages. All narcotics, firearms and ammunition are strictly prohibited or illegal in Indonesia. Long prison terms, huge fines and death penalty will be the expensive cost of this abusive product either purchase, sale or just user. There is no restriction on import of foreign currencies in cash or travelers checks.

money and currency
Bring enough small change and bank notes with you to pay taxi drivers or goods in market. Bali uses the currency of Indonesia, the Indonesian Rupiah.The physical sizes of them are less about the same but the colors are different from each other. They issued in notes of Rp 1000, Rp 5000, Rp 10,000 Rp 20,000, Rp 50,000, and Rp 100,000 hologram note

Being a major tourist destination, it is easy to change any major currency (such as Australian Dollars, Japanese Yen, American Dollars, etc) or travelers checks at banks and authorized currency exchange centers, known as 'Money Changers' (of which there are many).It should be noted that the exchange rate for cash is normally better than the rate for travelers' checks, and that in the case of USD, one will get a better exchange rate for larger denomination bills. Some charge commission and their rates of exchange do vary, hence it is worth shopping around for the best overall exchange deal, especially if there are large sums involved.

Major credit cards (Visa and MasterCard) are the most frequently accepted in a wide variety of restaurant and shops, Outside of that, visitors to Bali will find that the bulk of their transactions will take place in cash. In the major towns and cities on the island, ATM machines dispensing Rupiah (supporting Plus® and Interact® systems that allow one to access one's bank accounts from their home country) can be easily found