Registration opened on 27 October 2026. The government will help pay for equipment and installation of a 5–10 kW rooftop system. Here is who qualifies, the dates that matter, and how it compares with the tax deduction.
The Cabinet approved a ฿50,000 million budget to support rooftop solar for up to one million households, run through PEA and MEA. Each household can receive ฿50,000 toward equipment and installation, until the budget runs out. This is separate from the July 2026 excess-electricity buy-back round covered in our earlier article, and it comes with one rule that catches people out: you cannot also claim the ฿200,000 tax deduction.
These are the conditions published on the PEA registration site. Check each one against your electricity bill before you start.
Register first, then buy and install. The order matters because of the invoice date rule.
You must pick one for the same installation. The right choice depends mostly on how much income tax you pay.
| Compare | ฿50,000 subsidy (new) | Tax deduction up to ฿200,000 |
|---|---|---|
| What you get | ฿50,000 paid to you (or to your bank) | Your tax bill falls by the deduction × your marginal tax rate |
| Size of the benefit | Fixed at ฿50,000, whatever you earn | Up to ฿200,000 of cost can be deducted, so the benefit rises with your tax bracket |
| If you pay little or no income tax | Still worth the full ฿50,000 | Worth little or nothing |
| Period | Register 27 Oct 2026 – 31 Jan 2027; connect by 30 Sep 2027 | 3 Mar 2026 – 31 Dec 2028 |
| Availability | Limited: 1,000,000 households or until the budget ends | Not capped by a quota |
| Paperwork | Online registration, tax invoice dated 27 Oct 2026 or later, grid connection | e-Tax invoice and proof of grid connection, claimed on your annual return (P.N.D. 90/91) |
The deduction is worth the amount you spend (up to ฿200,000) multiplied by your marginal tax rate. Compare that with the flat ฿50,000. Figures below are simple arithmetic for illustration, not tax advice.
| Your marginal tax rate | Deduction value, system cost ฿150,000 | Deduction value, system cost ฿200,000 | Subsidy |
|---|---|---|---|
| 10% | ฿15,000 | ฿20,000 | ฿50,000 |
| 15% | ฿22,500 | ฿30,000 | ฿50,000 |
| 20% | ฿30,000 | ฿40,000 | ฿50,000 |
| 25% | ฿37,500 | ฿50,000 | ฿50,000 |
| 30% | ฿45,000 | ฿60,000 | ฿50,000 |
| 35% | ฿52,500 | ฿70,000 | ฿50,000 |
Bold figures are higher than ฿50,000. For a ฿150,000 system, only the top 35% bracket beats the subsidy; for a ฿200,000 system, the break-even is a 25% rate. Rates in Thailand step from 0% to 35%, and your own rate depends on your net taxable income.
One reported example: a 5 kW system costing about ฿150,000 would cost about ฿100,000 after the subsidy. Real prices depend on equipment, roof, electrical work and scope.
Information in this article reflects the PEA registration site and news reports as of the publish date above (29 October 2026). Conditions, dates and quotas are set by the government and the utilities and can change. Confirm current details with PEA (peoplesolar.pea.co.th) or MEA (mea.or.th) before you buy or install. This article is general information, not legal or tax advice.
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