Do you need proof of onward travel for a 30-day visa extension in Thailand?

No proof of onward travel is required for a 30-day extension of a visa exempt entry (30 days) or a tourist visa (60 days) in Thailand. You can extend once for an additional 30 days without needing an onward flight or insurance. Although there were rumors of changes to this rule, currently, no documentation of onward travel is necessary. Extensions beyond the one additional 30-day period are generally not allowed unless you qualify for a different visa type.