BANGKOK, THAILAND – Thailand’s new CO2-based car tax took effect on 1 January 2026, driving up prices for most new vehicles and reshaping the country’s auto market.
New CO2-based tax hits showrooms
In the first days of January, customers walking into showrooms were confronted with higher price tags, reflecting a direct intervention by the Thai government rather than routine manufacturer increases. With the so‑called “Car Tax 2026,” a long period of price stability ended and priorities shifted from engine size to actual pollution. The reform marked a clear break for the market, creating distinct winners and losers.
Annual road tax unchanged for existing cars
Officials emphasized that the overhaul did not affect the annual vehicle tax collected by the Land Transport Office for registration renewal. This fee, often referred to colloquially as the sticker tax, continued to be calculated based on engine displacement and vehicle age. Owners of existing cars therefore paid exactly the same amount as in the previous year.
Example of current annual costs
A typical four-door sedan under five years old with a 1,200‑cubic‑centimetre engine still incurred an annual tax of 1,200 baht. At the stated exchange rate, this corresponded to about 32.43 euros. According to the government’s explanation, there was no reason for concern for current vehicle holders in this area.
Excise tax on new cars tightened
The core change lay in the excise tax on new vehicles, which was embedded in the purchase price and did not appear as a separate line on invoices. The new logic followed a simple rule: high CO2 emitters had to pay more, while low‑emission models benefited from relief. The aim was to steer buyers towards cleaner drivetrains through financial incentives.
Petrol engines face steep progression
For pure combustion engines, especially classic petrol cars, a finely graded scale now applied. Engines up to 3.0 litres emitting under 100 grams of CO2 per kilometre were taxed at 13 percent, but emissions between 100 and 120 grams pushed the rate up to 22 percent, affecting many common mid-range models. Cars emitting 120 to 150 grams were charged 25 percent, while those between 150 and 200 grams faced 29 percent and vehicles above 200 grams were hit with 34 percent, making large, heavy petrol cars almost unaffordable for average earners.
High-displacement and sports cars penalized
Engines over 3.0 litres and supersports cars were treated separately with a flat tax rate of 50 percent. For vehicles priced in the millions of baht, this implied surcharges comparable to the value of a single-family home. Luxury and high‑performance models thus bore a disproportionate share of the new fiscal burden.
Hybrid vehicles lose part of their advantage
Conventional hybrid vehicles (HEV) also saw their tax burden rise. Even economical hybrids emitting under 100 grams of CO2 per kilometre were now taxed at 6 percent instead of the previous 4 percent. Between 100 and 120 grams, the rate increased to 9 percent, while hybrids up to 150 grams were taxed at 14 percent.
Costly hybrids with higher real-world emissions
Hybrids that consumed more in real driving and emitted 150 to 200 grams of CO2 were subject to a 19 percent tax rate. Above 200 grams, the burden rose to 24 percent, signalling that merely having an electric motor alongside a petrol engine no longer sufficed as a tax-saving model. The state scrutinised this supposedly green bridging technology just as closely as traditional engines.
Plug-in hybrids depend on electric range
For plug‑in hybrids (PHEV), electric range determined the tax level. Vehicles capable of at least 80 kilometres of purely electric driving benefited from a 5 percent rate, but if the range fell below that threshold, the tax doubled to 10 percent. Additional conditions required that batteries be manufactured in Thailand from this year and that vehicles be equipped with modern assistance systems to qualify for advantages.
Electric vehicles emerge as clear winners
Battery-electric vehicles (BEV) were the only clear winners of the reform. Their tax rate dropped permanently from 8 percent to 2 percent, amounting to a substantial subsidy to put more EVs on the road. Electric pick‑ups, a backbone of Thai transport, were also taxed at 2 percent instead of the previous 0 percent, a level still far more attractive than for their combustion-engine counterparts.
Immediate impact on car prices
For a standard new petrol car, the reform resulted in an immediate price increase of at least 5,000 baht, or around 135 euros. For a popular hybrid model valued at one million baht, roughly 27,027 euros, the tax rose from 4 to 6 percent. This meant an extra 20,000 baht, so buyers had to pay about 540 euros more solely because of the new tax band.
Climate neutrality goal by 2050
The measures formed part of a national strategy plan under which Thailand aimed to become climate‑neutral by 2050. The car tax was described as the government’s sharpest instrument to achieve this ambitious target and to push the population towards alternative drivetrains. At the same time, specialists cautioned against viewing the strong promotion of electric cars as a complete solution.
Concerns over infrastructure and power mix
Experts pointed out that charging infrastructure in many regions still lagged behind demand and that the electricity mix was not consistently green. They argued that one-sided support for electric vehicles could create new dependencies and environmental problems. The broader ecological footprint across the full life cycle of vehicles remained under discussion.
Surge in battery imports
The Thailand Development Research Institute (TDRI) published data showing a sharp rise in imports of lithium‑ion batteries. More than 1.7 million units had already entered the country with a value of over 16.9 billion baht. In euro terms, this represented an import value of almost 459 million euros, supplemented by large volumes of nickel‑metal hydride batteries.
Import dependence and future waste
The batteries arrived mainly from China, Japan and Germany, increasing Thailand’s dependence on foreign suppliers. Any disruption in supply chains or price rises could create major problems for the domestic auto industry. At the same time, the growing stock of batteries would eventually have to be disposed of or recycled.
Recycling gap and environmental risk
From 2032 onward, the first large volumes of these batteries would reach the end of their service life and be classified as hazardous waste. However, the country still lacked a coherent concept for safe recycling or disposal of the toxic components. If such batteries ended up on illegal dumps, heavy metals could seep into groundwater and contaminate soil, posing what the article described as a potential environmental catastrophe.
Health and economic implications
The risks for the population were described as tangible, since heavy metals in the human body could damage the nervous system. The situation raised the prospect of trading air pollution from exhaust fumes for soil contamination from battery waste. At the same time, failing to recycle meant discarding valuable raw materials and forcing Thailand to pay for costly disposal instead of recovering resources.
Balancing climate goals and lifecycle impacts
In its overall assessment, the article portrayed the 2026 car tax as a bold but incomplete step. Consumers buying a new car now either paid more for combustion engines or entered an electric system whose ecological footprint at the end of its life cycle still raised many questions. The analysis concluded that tax incentives alone would not be enough without a parallel strategy for infrastructure and battery recycling.
Methodological note on figures
The underlying figures were based on the legal situation as of January 2026. For currency conversion, an exchange rate of 1 euro to 37 baht was used, with a caveat that exchange rates fluctuated and final retail prices could differ at dealerships.