Most people will automatically receive a 30 day tourist visa stamp upon entry into an Indonesian airport which will cost you US$ 25 (best to pay in US$).
For any other questions please contact your embassy or consulate in your country.

Upon leaving Bali you will also be charged an additional airport tax of IDR 150000 per person (± EUR 10) (best to pay in IDR).

For a stay longer than 30 days and for other questions and advice, we suggest you take up contact with the Indonesian ambassador or consulate offices in your country.