Tax benefits · Updated 19 September 2026
Solar rooftop tax deduction of up to 200,000 baht — the law is now in effect
Royal Decree No. 805 (2026) lets individuals deduct the actual cost of solar power equipment and installation, up to a total of 200,000 baht, while companies can expense energy conservation equipment at 1.5× — claimable until 31 December 2028
Updated
Verified — this is real
Thailand's Anti-Fake News Center confirms this is true
The Anti-Fake News Center checked with the Revenue Department, Ministry of Finance, and stated that the news "installing solar in your home lets you deduct up to 200,000 baht in tax" is true, citing the Royal Decree issued under the Revenue Code on tax exemption (No. 805) B.E. 2569, dated 2 March 2026
Source: Anti-Fake News Center Thailand · Revenue Department
- 0baht
- Deduction cap for individuals, based on actual cost
- 0.0×
- Corporate expense for energy conservation equipment
- 0system/claim
- One claim for the entire program
- 31 Dec 2028
- Last day to claim
Your benefit
Benefits fall into 2 groups — see yours
This set of measures covers both homeowners and businesses, but works differently: individuals deduct actual costs from income up to a cap, while companies expense more than they actually paid
Group 1
Deduct up to 200,000 baht
Deduct the actual cost of buying and installing a solar power system on your residential roof from personal income tax, up to a total of 200,000 baht
- The system must be connected to the Metropolitan or Provincial Electricity Authority grid
- One claim per tax year, for 1 system
- A full electronic tax invoice (e-Tax Invoice) is required as evidence
- Cost: 150,000 bahtDeduct 150,000 baht
- Cost: 300,000 bahtDeduct up to 200,000 baht
Calculate your entitlement
Enter your expected installation cost to see how much you can deduct and roughly how much tax you'll save
Your top personal income tax rate
Select the rate for your net income bracket — estimate only
This is an estimate based on the legal cap only. Your actual tax savings depend on net income, other deductions and your personal/business tax rate. Please follow the Revenue Department's announcements
Register for a free consultation!How to claim
How to claim
- Step 1
Install an On-Grid system
Install a grid-connected solar power system on your residential roof
- Step 2
Apply for connection with MEA / PEA
The system must be fully connected to the Metropolitan or Provincial Electricity Authority grid
- Step 3
Keep the full e-Tax Invoice
Request a full electronic tax invoice from your installer covering both equipment and installation
- Step 4
Claim when you file your taxes
Deduct the actual equipment and installation costs from personal income tax, up to a total of 200,000 baht
Conditions
Conditions you must meet, and what voids your claim
Must have
- A system connected to the MEA or PEA grid (On-Grid)
- A full electronic tax invoice (e-Tax Invoice)
- Eligible costs are equipment and installation, up to a total of 200,000 baht
- Claim within the program period — until 31 December 2028
What makes you ineligible
- Claiming for more than 1 system, or claiming again in multiple tax years
- Receiving duplicate benefits from other measures, such as the Board of Investment (BOI) or the EEC
- No full electronic tax invoice from the installer
Payback figures cited in the media
- 120,000–250,000baht
- Installation cost range for 3–5 kilowatt systems
- 2,500–3,000baht/month
- Average electricity savings cited in the article
- 5–7years
- Payback period estimated in the article
These figures are cited from a Spacebar article as a market reference, not an EV Power Energy quotation — real prices depend on system size, equipment and site
Fiscal impact
Behind the measure — how much tax the state is giving up, and why
The Cabinet approved this draft Royal Decree on 26 November 2025, with the fiscal impact assessed in advance. The figures below come from a Thai PBS Policy Watch report
- 25,260million baht
- Tax revenue the state expects to forgo from the energy conservation equipment measure over 4 years
- 3,600million baht
- Tax revenue the state expects to forgo from the solar rooftop measure over 4 years
- 240,000million baht+
- Expected increase in domestic investment from both measures
Sources
References
Every figure and condition on this page is cited from the three sources below. If the Revenue Department issues further announcements or clarifications, follow those
Anti-Fake News Center Thailand20 March 2026
Installing solar in your home lets you deduct up to 200,000 baht in tax
Spacebar11 March 2026
Government backs rooftop solar with a 200,000-baht tax deduction, payback in 5–7 years
Thai PBS Policy Watch26 November 2025
"Solar rooftop" tax deduction up to 200,000 baht, claimable until 31 Dec 2028
FAQ
Can I really get a tax deduction for home solar?
Yes. Thailand's Anti-Fake News Center checked with the Revenue Department, Ministry of Finance, and confirmed it is true, citing the Royal Decree issued under the Revenue Code on tax exemption (No. 805) B.E. 2569, dated 2 March 2026
What's the maximum deduction, and which costs count?
Individuals can deduct the actual cost of buying and installing a solar power system from income tax, up to a total of 200,000 baht. For example, pay 150,000 baht and deduct 150,000 baht; pay 300,000 baht and deduct up to 200,000 baht
Until when can I claim?
You can claim until 31 December 2028, once per tax year, for 1 system
What documents do I need?
A full electronic tax invoice (e-Tax Invoice) from the installer, and the system must be connected to the Metropolitan or Provincial Electricity Authority grid
Can off-grid or unpermitted systems claim?
No. The conditions require the system to be connected to the MEA or PEA grid (On-Grid), and anyone receiving duplicate benefits from other measures such as the BOI or the EEC cannot claim this one
What do companies get from this measure?
Spending on energy conservation machinery, equipment or materials can be expensed at 1.5× the actual cost (an extra 50% of the expense exempt). For example, invest 1,000,000 baht in an installation and expense a total of 1,500,000 baht. Claimable until 31 December 2028