When a prime minister flies 5,700 miles to New Zealand and spends part of the trip insisting that nobody is leaving his country, the honest read is usually that somebody is packing.
Anutin Charnvirakul made exactly that denial on August 21, telling reporters in Wellington that Japanese manufacturers are not relocating their production bases out of Thailand, and pointing at headline foreign investment numbers as proof. In the same breath he confirmed he'd handed Deputy PM and Finance Minister Ekniti Nitithanprapas the job of reviewing whether Thailand's tax structure treats established manufacturers fairly. Governments don't order urgent tax reviews of industries that are doing fine.
Here's what's actually happening, and why it matters well beyond Bangkok.
Thailand's EV incentive packages, EV 3.0 and its successor EV 3.5, weren't simple consumer rebates. They were a trade. Import your battery cars into Thailand at a slashed excise rate of 2% instead of 8%, with import duties capped, take up to 150,000 baht per car in buyer subsidies — but you owe Thailand cars back. The offset ratio under EV 3.5 is one imported car for two built domestically by 2026, sliding to one-for-three in 2027 if you miss the first deadline.
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Think about what that obligation does mechanically. It is a debt denominated in physical vehicles. A company that imported aggressively in 2023 and 2024 now has to run Thai assembly lines flat-out through 2026 and 2027 whether or not anyone wants the cars, because the alternative is repaying the subsidies plus the excise differential plus penalties. That is a policy that manufactures oversupply by design, and oversupply is why Thai showroom prices have been in freefall.
The Excise Department has already learned how brittle this is. When Neta's Chinese parent went into bankruptcy proceedings, the Thai unit was left owing roughly 24,000 offset vehicles against about 4,700 actually built, after taking more than 2 billion baht in subsidies. Regulators tightened the rules — monthly production forecasts, withheld disbursements, bank guarantees — but the damage was done, and Thai dealers were left holding unpaid invoices.
Subaru's Thai contract assembler stopped building cars at the end of 2024. Suzuki announced it would close the plant at Pluak Daeng by the end of 2025, a factory that only existed because Suzuki signed up for Thailand's 2007 Eco Car program — the previous generation of Thai industrial policy, the one that promised tax breaks for small efficient cars. Suzuki's own language for the decision was clinical: "optimizing global production sites within the group."
Honda didn't leave, but it halved itself. Vehicle assembly at the 1996-vintage Ayutthaya plant ended and consolidated into Prachinburi, with Ayutthaya retooled for components. Combined Thai capacity had been 270,000 units against actual output under 150,000 for four straight years. That's not a market share problem, that's a fixed-cost bleed.
There's a grim symmetry here worth noting: when General Motors quit Thailand in 2020, Great Wall Motor bought the Rayong plant. Thailand's incentive schemes have now twice created industrial capacity that ended up in Chinese hands.
This is the part that got reported as an exodus and isn't one. It's a lobbying campaign, and it's specific.
Honda Automobile (Thailand) president and CEO Koji Iwanami used the Thai launch of the Super-ONE EV to make the case publicly. Fully built cars imported from Japan, Europe and the US face Thai import duties running up to 80%. Battery EVs and range-extended EVs arriving from certain partner countries under free trade agreements come in at zero. Honda isn't asking for zero — it's asking for something closer to parity, which would let it land models like the Freed and Jazz that it cannot build locally because Prachinburi is bumping its 110,000-unit ceiling.
The second ask is more technical and more urgent. Thailand is ratcheting up local-content requirements that hybrids must meet to keep their preferential excise rate. Honda's position is that four of its hybrid models physically cannot be re-engineered inside their existing product cycles, which would kick them from 6% excise to 8% and then 10%. On a car in a market where household debt has been strangling loan approvals for three years, that's a price increase aimed at exactly the buyers who can least absorb it. Honda is coordinating with five other Japanese brands through the Japanese Chamber of Commerce in Bangkok on an eight-point agenda.
Toyota has filed parallel complaints about imported EVs carrying a lighter effective tax load than cars built in Thai factories — while also publicly ruling out an exit, which it needed to do after Indonesia's finance minister openly invited it on August 4 to move regional production to Jakarta.
The clever part of Thailand's response is a category most Western buyers dismiss as marketing: the mild hybrid.
The National EV Policy Committee created a dedicated MHEV excise band — 10% for vehicles under 100g/km CO2, 12% for 101–120g/km, locked for seven years through 2032, conditional on at least 5 billion baht of investment, locally built batteries from 2026, locally sourced traction motors or assist components from 2028, and four of six ADAS functions fitted.
Read that as industrial policy rather than emissions policy. A 48V mild hybrid keeps the engine, keeps the multi-speed transmission, keeps the exhaust and aftertreatment, keeps the fuel system, and adds a belt-driven starter-generator and a small lithium pack. It counts as electrification on a spreadsheet in Bangkok while preserving nearly the entire ICE component tree that Thailand's supply base actually makes. Mazda took the bait immediately — the Board of Investment approved over 7.4 billion baht for AutoAlliance in Rayong to build a mild-hybrid B-segment SUV from 2027 for domestic sale and export to Japan and ASEAN. Isuzu is putting in over 15 billion baht, largely aimed at Euro 6 pickup capability. Mitsubishi has outlined 16 billion baht over five years for hybrids.
That supply-chain math is the whole argument. Thailand's auto sector runs on more than 2,400 companies employing over 700,000 people, and a battery EV simply doesn't need most of what they build. No alternator. No starter motor. No injectors, no fuel pump, no catalytic converter, no clutch, no torque converter, no multi-ratio gearset, no exhaust manifold. A parts maker that has spent thirty years perfecting hydraulic power steering pumps does not pivot to battery module housings because a minister asked nicely.
Ekniti has instructed Finance permanent secretary Lavaron Sangsnit and Excise Department director-general Pornchai Theeravech to have a new excise structure finished by September, issued as a ministerial regulation under the Excise Tax Act — which means it can take effect inside 2026 without a parliamentary vote.
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The design constraint is elegant and worth understanding. Thailand can't raise tariffs on Chinese cars, because those are locked in by the ASEAN-China free trade agreement. Excise tax, however, is domestic law. So the lever becomes: lower excise for anyone with a Thai factory using Thai parts, standard excise for anyone shipping in finished cars. Same commercial effect as a tariff, no treaty violation. Expect other ASEAN governments to copy the structure if it survives contact with Beijing.
If you're buying in Thailand or any market Thailand feeds, three things follow.
First, brand survivability is now a real line item in total cost of ownership. Neta owners discovered what happens when a manufacturer with no independent parts network exits: collapsing resale, warranty claims against a shell, and body panels that take months. Ask how long the importer has been there and who honors the warranty if the parent files.
Second, structural battery packs and the total-loss threshold. A pack integrated into the floorpan means a moderate underbody strike can write off an otherwise repairable car, and insurers in fast-growing EV markets are still calibrating those premiums. Check the deductible and the pack warranty transferability before you're delighted by the sticker price.
Third, if you buy pickups anywhere in the right-hand-drive world — Australia, the UK, South Africa, the Gulf — Thailand's excise rewrite decides what you'll be able to buy in 2028. The Hilux, Ranger, D-Max and Triton are Thai-built exports. A tax code that rewards Euro 6 diesels and mild hybrids over battery pickups is a tax code that keeps the diesel one-tonne truck alive for another product cycle.
Thailand spent forty years persuading Japan to build it an auto industry, then spent three years subsidizing the competition that hollowed it out. The bill for that arrives in September.
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