The insurance and tax of my car here in Thailand will run out end of next month.

Because I will not be in TH until june, I think of not to renew insurance and tax next month and do that when I come back in june.

Is that possible without problems?

Insurance then will start new in june for one year, I think that will not be a problem.

But what is about the tax?

Sorry title wrong, first letter should be a N not a T

You will pay a very small late fee. Not to worry.

You will pay a very small late fee. Not to worry.

Quite correct - as the vehicle is not 'on the road'. You will however need to re-apply for new insurance so do keep the renewal letter as you may be able to use that for your NCB

For an on-line quote when you need to apply please go HERE