Thailand agrees in principle to restructure EV excise tax

Tax treatment would track the value created in Thailand

The planned framework moves away from treating all EV supply models alike. Instead, tax treatment would vary according to investment, local production and the depth of value added in Thailand. The Board of Investment described four broad tiers, ranging from imported vehicles sold by companies with no Thai manufacturing base to locally built models using a high share of domestic components, especially key electronics.

Two intermediate cases are also contemplated. Automakers that already manufacture in Thailand could still import selected models to test the market, but the permitted volume would be linked to the economic value they generated locally in the previous year. A separate tier would cover Thai-assembled vehicles with moderate local content, including lower-volume models that have not yet developed enough local sourcing for critical electronic parts.

The policy comes as electrified vehicles take a larger share of the domestic market. BOI reported that BEVs, HEVs and PHEVs together accounted for 55% of vehicle registrations in the first seven months of 2026. As of 31 August, BOI-approved investment across the EV ecosystem covered 189 projects worth 151.372 billion baht.

For practical context, see Thailand economy and finance. This development also connects with Thailand backs e-Tax incentives through 2027, drafts pending.

Importers and local manufacturers would face different incentives

For automakers, the September decision is already a strategic signal. A company relying on imports without manufacturing in Thailand should expect less favourable excise treatment under the proposed structure, while deeper local production and stronger domestic sourcing are intended to move vehicles into lower tax brackets.

That does not mean every vehicle assembled in Thailand would receive the same rate. The framework is designed to distinguish between different levels of local value creation, so the tax position of two domestically assembled models could differ depending on investment, production depth and component sourcing.

The same logic could strengthen demand for Thai suppliers if final rules make high-value local components a meaningful factor in the excise calculation. The exact thresholds, qualifying components and rate differences, however, have not yet been published.

**Buyers do not have a new tax bill to calculate yet**

The 10 September decision approved the principles of the restructuring; it did not introduce a complete replacement tax schedule. BOI's announcement gives no final percentage for each of the four tiers and no date on which the new structure will legally take effect.

For a car buyer, that makes any model-by-model price prediction premature. A manufacturer may eventually face a different excise burden depending on how it imports, assembles and sources vehicles in Thailand, but the effect on a showroom price cannot be calculated from the policy announcement alone. The next meaningful step will be the formal tax schedule and its implementation date.