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Last amendment: > on 2025-07-23.
EV 3.5 is structured as a four-year (2024-2027) bundle of three stacked fiscal instruments administered by three different Thai agencies:
1. Direct purchase subsidy (Excise Department / Department of Land Transport disbursement). THB 100,000 per battery-electric passenger car or pick-up with battery capacity ≥ 50 kWh; THB 50,000 for BEV passenger cars with 10-50 kWh battery; THB 10,000 for electric motorcycles. Subsidy levels step down across the 2024-2027 window (highest in 2024, lowest in 2027) to front-load adoption.
2. Excise-tax reduction. BEV passenger cars priced ≤ THB 7 million pay 2% excise (reduced from the standard 8% applied to comparable ICE vehicles). Pick-ups in the same price band similarly receive preferential rates. The reduced rate applies for the full 2024-2027 programme window if the OEM signs an MoU with the Excise Department committing to the local-production offset.
3. Import-duty relief on CBU imports (2024-2025 only). BEV passenger cars priced ≤ THB 2 million qualify for up to 40% reduction in MFN import duty during the first two programme years. The relief sunsets on 31 December 2025 to force participating OEMs to transition to local assembly in 2026-2027.
4. Local-production offset (the conditionality). OEMs that import CBUs under the relief must produce inside Thailand 1 BEV for every 2 imported by end-2026, and 1 BEV for every 3 imported by end-2027. Failure triggers clawback of the granted excise relief, import-duty relief, and purchase subsidies — calculated retroactively per vehicle.
5. Battery / TIS standard. Both imported and domestically assembled BEVs must carry batteries certified to Thai Industrial Standards (TIS) and tested at the Automotive and Tire Testing National Center (ATTRIC). This is the standards-side hook that Thailand uses to anchor battery-cell-pack manufacturing alongside vehicle assembly.
under EV 3.0 + EV 3.5 reached THB 137 billion (~USD 4 billion) by August 2025 — meaningful at the scale of Thailand's automotive sector (~10% of GDP) and large enough to reshape regional ASEAN EV-supply geography.
conditionality plus the 2-year sunset on import-duty relief together function as a structural commitment device that converts purchase incentives into fab-equivalent industrial capacity inside Thailand. This is why severity is 4 rather than 3.
most directly captured Chinese-OEM gigafactory placement in ASEAN (BYD's Rayong plant, MG New Energy at Chonburi, GAC AION Rayong, GWM Rayong, Changan Rayong, Chery). Indonesia's competing pitch (anchored on nickel and Indonesia-Korea KIK clusters) and Vietnam's Decree 182 (general investment-support fund) compete in the same space.
country's vehicles — it is a positive industrial-policy instrument rather than a tariff or sanction. Severity 5 is reserved for measures with explicit denial-of-access dimensions (export controls, sanctions, reciprocal tariff regimes).
Rayong-Chonburi cluster as the principal Chinese-OEM ASEAN export platform. From there, BYD, MG, GAC AION, GWM, and Changan reach not only the Thai domestic market but right-hand-drive ASEAN, Australia, UK, and parts of Africa via existing automotive shipping infrastructure.
Isuzu hold the legacy ICE / hybrid Thai market (~80% combined share pre-2024). EV 3.5 is the policy that begins displacement; Toyota's response has been to commit to its own Thai BEV / HEV production line (announced May 2024) under the same EV 3.5 incentive umbrella.
for Thailand-located battery-cell, pack, and BMS assembly. CATL has signed a Rayong battery-pack JV; SVOLT and EVE Energy have Thailand capacity announcements. This is the indirect pull on lithium / cobalt / nickel demand that ties EV 3.5 to the EM-resource-upstream-capture theme via downstream demand for Indonesian and Australian feedstock.
exporting Thai-assembled BEVs to the EU partially circumvent the October 2024 EU countervailing duties on Chinese-origin BEVs (filed: 2024-10-29-eu-china-ev-countervailing-duties), since rules-of-origin qualification can move to Thailand once a sufficient share of value-add is local. The EU's EV-CVD investigation explicitly flagged this risk in its disclosure.
CPALL, AOT, Bangchak — secondary beneficiaries through automotive supply chain. EIDO (Indonesia) and VNM (Vietnam) face competing regional headwinds. LIT (lithium / battery) gets pull-side demand. Chinese-OEM ADRs / Hong Kong listings (BYD 1211.HK, GWM 2333.HK, GAC AION 2238.HK) are direct equity beneficiaries.
vs. announced? Track BOI quarterly approval-vs-disbursement reports for slippage indicators.
trucks, buses, and battery-storage stationary applications, or remain passenger-vehicle focused?
Japanese OEMs cannot meet the 1:2 / 1:3 offset on BEVs, will Thailand carve out exemptions for hybrid (HEV) / plug-in hybrid (PHEV) under separate measures? (A revised excise structure for HEVs is already in discussion as of 2025.)
BEVs under origin / FEOC rules? The EU October 2024 CVD ruling on Chinese BEVs is the first stress test; the US has not yet ruled on Thai-origin Chinese-brand BEVs but the IRA §30D FEOC test is the natural pinch point.
Thailand's history with previous ICE-vehicle local-content rules suggests negotiated extensions are possible. Watch for the first clawback case in 2027.