Can I extend my 60-day tourist visa before it expires in Thailand?

You can apply for a 30-day extension of your 60-day single-entry tourist visa, but it must be done within the timeframe set by local immigration offices. Generally, you can apply for the extension within 30 days before your visa expires. However, some immigration offices may allow extensions to be requested as early as 45 days or even as late as 15 days prior to the expiration.