The official currency of Laos is the kip, however United States dollar cash is accepted almost everywhere. The exchange rate fluctuates but at time of writing, $1USD was the approximate equivalent of 10,000 kip. Thai baht is readily acceptable, although at less favourable rates. As you will accumulate kip as change from payments you make in USD, we recommend you change either nothing or very little (eg. $30USD) into kip upon your arrival in Laos. For current exchange rates please visit www.xe.com
As your time in Laos will be limited, please bring enough money for the duration of your trip. We suggest you allow approximately $5USD to $7USD per person for a main course meal at a nice restaurant.