I have been in LOS for some years on Non O Retirement visa.  Visa extension runs out in July 2022.  For various reason I might not be in Thailand in July this year.  Can I apply for an earlier extension for, say 6 months, so that annual extension comes up in January, when I am more likely to want to be in LOS than in UK summer time?

Or, if I cannot extend before July, can I then apply for, and be given, 6 months extension?

Extension based on retirement is given for period of 12 months or up to expiry of pp if that is earlier than 12 months. 

Would be best to obtain extension prior to departure and buy a reentry permit.

You can apply for extension 30 (and some offices 45) days prior to expiry of permission of stay.

You can also ask immigration for slightly earlier application if departing etc. 

 

The only way to change the date your extension is due is to leave the country without a re-entry permit and then start all over again with a new non-o visa and then a extension of stay.