Proposed Adjustments to Thailand’s TISA Tax Deduction Scheme

According to a report by Prachachat Business published on August 2, 2026, the Thai Ministry of Finance is reportedly finalizing adjustments to the Thailand Investment Savings Account (TISA) tax deduction scheme. Current discussions suggest a reduction of the annual tax deduction limit to 600,000 baht, down from the previously proposed 800,000 baht.

Furthermore, the ministry is expected to eliminate the 'multiplier' system that was previously linked to income levels. Under the earlier proposal, individuals earning 1.5 million baht per year were eligible for a 1.3x multiplier, while higher-income earners were subject to a 0.7x multiplier. Ekniti Nitithanprapas has reportedly confirmed that the latest version of the TISA proposal will exclude these multipliers entirely.

For residents and expatriates in Thailand, these potential changes are significant as they directly impact personal financial planning and tax liability strategies. Adjusting the deduction cap and removing income-based multipliers would simplify the calculation process but may alter the overall tax benefits for different income brackets.

It is important to note that these details remain based on reports of ongoing discussions within the Ministry of Finance. Official confirmation and the final regulatory framework for the TISA scheme have yet to be formally announced. Residents should monitor official government channels for updates before making long-term financial decisions based on these proposed figures.