Thailand Introduces Retroactive Tax Exemption for ACAI Foreign Staff

Thailand’s Cabinet approved in principle Tuesday a draft regulation that would exempt foreign staff of the ASEAN Centre for Active Ageing and Innovation from Thai personal income tax on qualifying pay.

Deputy Government Spokesperson Lalida Persvivatana announced the decision on August 11, 2026. The proposed relief would cover salaries and other remuneration paid by ACAI or by the employees’ home governments for work performed in Thailand.

The measure would apply retroactively to income received from June 6, 2024 onward. It remains subject to Thailand’s formal regulatory process before becoming fully operative.

The Ministry of Finance estimates the exemption would reduce state revenue by about THB 1.7 million per year. The measure targets ACAI personnel, not foreign workers generally.

The proposed exemption follows Thailand’s agreement with ACAI

The draft regulation would implement the Host Country Agreement between Thailand and ACAI. Persvivatana said the arrangement would support the Thailand-based center and allow it to receive the privileges established under the agreement.

“The measure is intended to support the Thailand-based centre's operations and strengthen the country's role in advancing regional cooperation on ageing societies. It would ensure that the centre's office and personnel receive the full privileges provided under the agreed framework, enabling ACAI to operate more efficiently in Thailand.”

The Thai Finance Ministry proposed the regulation. Ekniti Nitithanprapas, Deputy Prime Minister and Minister of Finance, said the revenue reduction was limited and that longer-term gains in knowledge and innovation outweighed the cost.

The proposed personal income tax exemption would cover remuneration connected to ACAI work in Thailand. That includes qualifying payments from the center and payments from the relevant home governments.

Foreign ACAI staff would receive relief on qualifying remuneration

If the regulation proceeds, eligible employees would not include ACAI-derived remuneration when calculating their annual Thai personal income tax. The retroactive date could also address tax treatment for staff who had waited for the agreement’s implementation to become clear.

The measure does not create a broad benefit for digital nomads, remote workers or other expatriates. Its scope is limited to foreign personnel working for ACAI in Thailand and to the income categories specified in the draft.

The center could use the exemption when recruiting international specialists from ASEAN countries and partner organizations. The research identifies the World Health Organization and JICA as examples of potential partner institutions.

Formal adoption remains the next legal step. The approval announced Tuesday represents agreement in principle, rather than completion of the regulatory process.

ACAI was created to coordinate responses to ageing populations

ACAI launched at the 36th ASEAN Summit in Thailand in November 2019. The center was established to help the 10 ASEAN member states prepare for rapidly ageing populations, described in the research as a “demographic time bomb.”

Its work covers healthy ageing, social policy and the exchange of practices related to the “silver economy.” Dr. Somsak Akksilp, ACAI’s Executive Director, has described the center as a “knowledge base for exchanging information and monitoring changes in the region's demographic structure.”

Thailand’s prime minister, Anutin Charnvirakul, chaired the meeting that approved the draft. In July 2026, he said, “population ageing is not a burden to be managed but a structural transformation.”

The center has also been pursuing regional work beyond its Thailand office. In July 2026, an ACAI delegation led by Somsak visited Vietnam to refine the Regional Action Plan on Ageing.

Regional leadership is changing alongside the tax measure

Vietnamese Deputy Minister of Health Do Xuan Tuyen became chair of the ACAI Governing Board on July 1, 2026. His term runs from 2026–2028 and signals a more active regional leadership role for the organization.

The tax proposal arrives during a wider Thai tax overhaul led by Ekniti. That program includes removing exemptions for small online imports and introducing a Global Minimum Tax framework.

Those broader measures are separate from the ACAI proposal. The draft under consideration concerns a defined group of foreign personnel and specific remuneration tied to work at the regional center.

The proposed rules would therefore give ACAI staff a clear retroactive reference point while the government completes the regulation. The qualifying period begins Thursday, June 6, 2024.