While the regular fine will be 5000 baht in Pattaya the maximum penalty can be up to 50,000 Baht and 3 month in Jail!
Update: The law will be applied starting January 2019. 5000 if you du don’t carry your driving license, 10000 if you forgot to renew it and 50000 if you never had it.
August 20: The Department of Transportation has amended the new law to increase the penalty for not carrying a driver’s license or expired license. The maximum fine is 50,000 Baht, imprisonment is not more than 3 months, hope the driver more respect for traffic rules.