Expired Car Tax in Thailand: What You Owe and What Happens After 3 Years

If your Thai car tax has lapsed for less than three years, you pay the overdue tax plus a 1% monthly surcharge and renew as normal, although cars more than a year behind must pass an inspection first. At three full years, the registration is cancelled and the car has to be registered again with new plates. For anyone buying or selling through Talata, a Thai marketplace that lists used cars from many sellers in one place, this matters at the point of sale: a car with unpaid tax cannot be transferred.

What counts as overdue car tax in Thailand

Overdue car tax means the annual vehicle tax was not paid by the expiry date printed on the round tax disc on your windscreen. There is no grace period. Section 32 of the Motor Vehicle Act B.E. 2522 (1979) charges a surcharge of 1% of the unpaid tax for each month or part of a month, so even one day late counts as a full month.

You can avoid the surcharge by paying early. The Department of Land Transport (DLT) accepts annual tax up to 90 days before the due date, both at its offices and online.

Under 3 years overdue vs 3 years or more

The three-year line comes from Section 35/3 of the Act: once the annual tax has gone unpaid for three consecutive years, the registration is automatically cancelled. Everything after that works differently.

How the 1% monthly surcharge is calculated

Each year of tax is treated separately. The surcharge for a given year starts from that year's own due date, which means the oldest unpaid year carries the largest surcharge and the current year may carry none at all.

The base amount also changes over time. Under Section 29, private passenger cars with up to seven seats get a discount once they have been registered for five years: 10% in year six, rising by 10% a year to a maximum of 50% from year ten onwards. For the base rate by engine size, see how much car Por Ror Bor and annual car tax cost.

A worked example

Say the tax is 1,600 baht a year, due every 1 March, and the last payment covered 2024.

The flat 1,600 baht figure keeps the arithmetic simple. Your real bill is whatever the DLT system or counter calculates, and it excludes compulsory insurance and inspection fees.

The surcharge itself is modest. What costs more is the risk of a fine while driving, and the clock ticking towards the three-year cut-off. If the arrears are large, Section 35/2 lets the registrar accept the current year's tax first and set a schedule for the overdue amount under criteria set by the DLT Director-General. Ask the office where your car is registered whether that option is available.

Inspection once you are more than a year behind

A car more than one year behind on tax must pass an inspection before the tax can be paid, whatever its age. For online payment, DLT accepts a certificate from a licensed private inspection centre, known locally as Tor Ror Or. Some provincial offices ask for the inspection to be done at the DLT office itself if you pay in person, so call ahead. Cars that are up to date follow the normal age rule explained in our guide to car inspection in Thailand.

What you pay once the registration is cancelled

Back tax is capped at 3 years

Section 35/3 contains one piece of relief: the tax liability for any year after the third is cancelled along with the registration. However long the car has sat unregistered, you pay at most three years of back tax plus the 1% monthly surcharge on each year, and then the tax for the new registration year.

New registration fees

DLT's public service guide for vehicle registration lists:

• Application fee: 5 baht
• Car inspection at DLT: 50 baht
• Number plates: 100 baht each (a car needs 2)
• Registration book: 100 baht

That comes to about 355 baht before tax and compulsory insurance. Compulsory third-party insurance (known as "Por Ror Bor") for a private car with up to seven seats is 645.21 baht a year at the rate set by Thailand's insurance regulator, the OIC. These are October 2026 rates; check again before you go, as DLT held a public consultation on raising plate fees in May 2024.

Fine for not returning the plates

When the registrar posts the list of cancelled registrations, owners have 60 days from the notice to return both plates and bring the registration book in to have the cancellation recorded. Missing that deadline can cost up to 1,000 baht under Section 61, and officials may seize the plates. Some websites quote 30 days; the Act says 60.

How to re-register a car after 3 years

Re-registration is the only way to put the car back on the road legally. The usual order is:

1. At the DLT office where the car is registered, pay the back tax and surcharge, return both plates, and have the cancellation recorded in the registration book. For Bangkok-registered cars, call first to confirm which office handles this.
2. Buy a new compulsory insurance policy that is in force before you file.
3. Have the car inspected at a DLT office. Bring it on a tow truck or flatbed, because driving a car with a cancelled registration is an offence.
4. File the new registration and pay the fees plus the new year's tax.
5. Collect the registration book with the new number. If the plates are not ready, you get a temporary substitute.

Documents to bring

• Original registration book
• Original ID of the owner or registered possessor
• Both old number plates, if not yet returned
• Proof of a valid compulsory insurance policy
• A power of attorney with copies of both parties' IDs, if someone goes on your behalf
• An engineer's certificate, if the car runs on LPG or NGV
• A power of attorney from the finance company, if the car is still on hire purchase

Requirements differ slightly between offices, so call the DLT hotline 1584 before you go.

If you are a foreign owner

The steps are the same for foreign owners. Bring your passport instead of a Thai ID card, plus proof of your Thai address such as a certificate of residence. Counter staff and the 1584 hotline mainly work in Thai, so bringing a Thai-speaking friend or agent makes the visit much easier.

Can you keep your old plate number?

Generally no. A re-registered car receives a new series and number from whatever the office is issuing that day. The exception is an auction plate: the owner keeps the right to that number and can apply to put it back on the same car, with extra paperwork. If you simply want a number you like, the practical route is to reserve a car registration plate online.

Fines if the police stop you

Section 6 of the Act bans driving a car whose annual tax is unpaid and a car whose registration has been cancelled. Both carry an administrative fine of up to 2,000 baht under Section 60. The 10,000 baht figure you may see online belongs to Section 59, which covers cars that were never registered at all. The ceiling is the same as for a simple tax lapse, but a cancelled registration is riskier because officials can also confiscate the plates.

Unpaid traffic tickets now matter too. Under an agreement between the Royal Thai Police and DLT, tickets issued from 1 August 2026 that stay unpaid are shared with DLT. You can still pay your annual tax, but you receive the real tax disc only after the fine is settled. Older tickets are not covered. Before you go to renew, check Thai traffic fines by licence plate online.

Financed cars, LPG/NGV cars, and motorbikes

Cars still on hire purchase

Until the loan is paid off, the finance company is the legal owner in the registration book and the borrower is only the registered possessor. The original book stays with the lender. If the tax lapses for three years, ask the finance company to handle re-registration or to release the book with a power of attorney so you can do it yourself. Some lenders ask for a deposit while the book is out. If the car is also changing hands, sort this out together with transferring the car hire purchase agreement.

LPG or NGV cars

A gas-converted car needs a certificate from a licensed engineer confirming the gas system has been checked, and it cannot renew tax online. Book the engineer before your DLT visit.

Motorbikes

The same rules apply: 1% a month, and cancellation after three consecutive years. The difference is a much lower annual tax and a 10 baht inspection fee at DLT. See our guide to renewing motorbike tax in Thailand for rates and documents.

Buying or selling a used car with overdue tax

Section 35/1 lets the registrar refuse any registration service, including an ownership transfer, until the overdue tax is paid in full. A car that is less than three years behind therefore has to be cleared before or on the day of the transfer, and a car with a cancelled registration has to be re-registered first. In both cases, avoid an open transfer, where the buyer takes the car and signed papers but the book stays in the seller's name. It leaves the buyer with no legal title and depends on the seller turning up to sign later.

How to check how far behind a car is

Start with the expiry date on the tax disc, then ask to see the registration book and the most recent tax receipt. If they do not match, or there is no disc, ask the seller to log in to DLT e-Service or the DLT Vehicle Tax Plus app with the owner's account and show you the amount due, or call 1584. A missing disc does not always mean unpaid tax; sometimes the disc was simply lost.

Who pays the overdue tax?

The law does not say. Buyer and seller can agree either way. The cleanest options are for the seller to renew before the transfer date or to deduct the back tax and surcharge from the price, then write that into the car sale agreement.

Before you commit to any car, check the tax status, the compulsory insurance and the name in the book, and compare it with other cars in the same price range. When you find one with complete papers and clear terms, contact the seller through Talata.

Buying or selling a used car on Talata

For buyers, Talata gathers used car listings from many sellers in one place, with filters for brand, price and location. You can message sellers directly to ask for the registration book and tax status before arranging a viewing, which weeds out cars with paperwork problems early.

For sellers, a listing for a car with up-to-date tax, showing the tax and insurance expiry dates in the description, tends to sell faster with less haggling. If your car is ready, start your listing on Talata.

Frequently Asked Questions

How much extra do you pay if annual car tax is late?

You pay a surcharge of 1% of the unpaid tax for every month or part of a month, calculated separately for each tax year. It is also the answer to the well-known Thai driving test question on late tax.

How many years can car tax lapse before the registration is cancelled?

Less than three. After three consecutive unpaid years, the registration is cancelled and you can no longer simply pay the tax; you must return the plates and register the car again.

Do I have to pay tax on a car I am not using?

Yes, unless you have notified DLT that the car is out of use. Section 34 requires tax on every registered car, used or not, unless the owner files a non-use notice before the next tax due date. While that notice is in effect, the car must not be driven on public roads.

My car has been untaxed for 5 years. How many years of back tax do I owe?

At most three years plus the surcharge, because Section 35/3 cancels the tax liability for years after the third once the registration is cancelled. The rest of the process is the same as for any car more than three years behind.

Does my car insurance still cover me if the tax has lapsed?

Compulsory insurance that has not expired still applies, because it is separate from the tax. For voluntary insurance, ask your insurer how your policy treats a lapsed tax.

The car I want to buy has a cancelled registration. Can I just take it on an open transfer?

You should not. A car with a cancelled registration cannot be transferred in the system until it is re-registered, so you would have no name in the book at all. Ask the seller to re-register first, or put in writing who will do it and by when.

What should I check before paying a deposit on a car with "a few months" of unpaid tax?

Look at the registration book, the latest tax receipt and the tax disc itself. The expiry dates on all three should match. If you are unsure, ask the seller to show the amount due in the DLT system before you hand over any money.

Can I list a car for sale on Talata if its tax has lapsed?

Yes. State the tax status honestly and say who will clear it before the transfer. Buyers almost always ask, so putting it in the listing saves time and builds trust.