Licensed moneychanging booths can be found in much of central Vientiane, particularly along Th Setthathirath between Th François Ngin and Th Pangkham. You can also change cash at various shops, hotels or markets for no commission but at poor rates.
Banks listed here change cash and travellers cheques and issue cash advances (mostly in kip, but occasionally in US dollars and Thai baht) against Visa and/or MasterCard. Many now have ATMs that work with foreign cards, but it's often cheaper to get a cash advance manually. All are open 8.30am to 3.30pm Monday to Friday.