Upvote:1
You do not need a new visa but could get a visa extension:
your 30 day visa exempt entry at immigration for a fee of 1900 baht. In Vientiane you only need the application form with 2 photos attached, copy for your passport photo page and Lao entry stamp. Plus 1000 baht for the fee.
(From this forum, also asked concerning a Swedish passport)
Looks like itβs the same question as you posted here.
Also verified from this source:
Those who arrive at the airport without a prior visa will continue to receive a 30-day stamp up to 6 times per calendar year. Extensions at Thai Immigration for the visa exemption stamps remain to be 30 days for a fee of 1,900 baht.
(Also verified on this website)