You have six months from your entry into Thailand to bring in your household items from your home country.  After you have been granted a permit to stay for a year in Thailand, your belongings will not be taxed.If However your permit to stay is for less than one year, these items will be taxed 20 percent import duty plus 7 percent value-added tax. 

 

The period of six months starts from the date that you initially entered Thailand on the retirement visa, regardless whether you leave or re-enter Thailand after that date.  However, the deadline is somewhat flexible.  If your personal items are due to arrive in Thailand more than six months after the entry date, you should inform Customs about this at least two months before the six-month deadline.