It’s an easy process if your car or bike is less than 5 years old. Just go to your Land Transport Office with your vehicle book (or a photocopy if you are paying a credit) and the proof that you have paid the P.R.B. (Compulsory Motor Insurance) for the year to come.
The fee for the tax sticker depends on the type and age of your vehicle. Typically for a motorbike it is around 300-400 baht. For a car it starts at around 1,000 baht (engine up to 2,000cc), average price is about 2,000 baht (for example a Toyota Altis 1.8) but it can go up to 6 to 7,000 baht, for instance for a 4-door pick-up.
The fee is the same each year for the first five years, then it is reduced by 10% every year up to a maximum of 50%.
If your car or bike is more than five years old, you have to undertake a technical check before you can apply to renew your registration. Take your vehicle to a certified garage, like this one:
The inspection costs about 200 baht and takes just a few minutes. They verify the car number and check the lights, the brakes and the exhaust. If your vehicle passes the test, you are issued a certificate that you have to show to the Land Transport Office, along with the blue book (for a car) or green book (for a bike) and proof that you paid the “Po-Ro-Bo”.