Late payments for the land and building tax, which are due at the end of this month, will not incur fines for those without a tax assessment notice, said the Finance Ministry.
The move is to ease concerns among land and homeowners who have not received a tax assessment notice from local authorities.
Ministry spokesman Lavaron Sangsnit said those who have not received a tax assessment form do not need to worry, adding local administrative bodies and the Bangkok Metropolitan Administration (BMA) had decided to extend this month's tax collection deadline.
The spokesman did not say how long the deadline is extended for.
His remark came as the Monday deadline approaches. Many landowners are said to be confused as to what to do because they have not received a notice, which is usually delivered by mail.
A new land and building tax took effect at the start of this year, and the first collection was scheduled to commence in April.