The Thailand Treasury Department is narrowing the gap between official land appraisals and market values—a shift that will raise property taxes, transfer fees, and loan capacity for anyone who owns real estate in the Kingdom. Under the direction of Director-General Akkaruth Sandhyananda, the agency is working to shrink the current 30-40% gap between government appraisals and market values, targeting a 20-25% difference by 2027—still short of the international standard of 15%, but a significant adjustment nonetheless.
Timeline: When Changes Take Effect
Current Period: January 1, 2023 – December 31, 2026
• Current appraisal rates remain in force
• No changes to taxes or transfer fees until 2027
Next Period: January 1, 2027 – December 31, 2030
• New appraisals take effect
• Higher property taxes and transfer fees apply
• Increased loan capacity for collateral-based borrowing
Why This Matters
• Higher loan capacity: Land used as collateral will support larger borrowing amounts at banks.
• Steeper annual taxes: The Land and Building Tax will climb for multi-property owners and developers as appraisals rise.
• Transfer fees increase: Buyers completing transactions after January 1, 2027, will face higher registration costs tied to the new valuations.
• D-Value digital service: A new 24/7 platform launched this month allows instant, free appraisal certificates in roughly 10 minutes.
Current Appraisals Valid Through Year-End
The appraisal rates currently in force took effect on January 1, 2023, and run through December 31, 2026, part of the four-year revision cycle mandated by law. Nationally, land valuations rose an average of 8.93% in this round, while building appraisals increased 6.21%. Bangkok saw a more modest 3% uptick, with prime corridors—Silom, Ploenchit, Wittayu, and Rama 1—reaching the capital's ceiling of 1 M baht per square wah. The lowest valuation in Bangkok sits at 500 baht per square wah, while provincial extremes range from 25 baht per square wah in parts of Chiang Mai to 400,000 baht in Songkhla. Surat Thani recorded the cycle's most dramatic shift, with a 117% jump from the previous period.
These figures, however, remain well below what buyers and sellers actually negotiate. In Ploenchit, for instance, market transactions have reached 3.85 M baht per square wah—nearly four times the official appraisal. This persistent undervaluation has practical consequences: mortgage lenders cap loan-to-value ratios based on the lower government figure, limiting credit access, while the state collects less in transfer and annual tax revenue than it theoretically could.
Closing the Valuation Gap
Akkaruth's policy signals a deliberate pivot. By narrowing the spread to 20-25% below market price, Thailand will edge closer to the 15% benchmark used in comparable economies. The Treasury Department plans to finalize the new appraisals by December 1, 2026, with implementation slated for January 1, 2027, covering the next four years through December 31, 2030.
To achieve greater accuracy, the department is deploying artificial intelligence and satellite mapping tools, starting with pilot projects in Nakhon Nayok province and parts of Bangkok in late 2025. The goal is to capture hyperlocal variables—road frontage, flood risk, proximity to transit—that the current zone-based methodology often misses. Officials describe the upgrade as essential to maintaining parity with regional peers and ensuring that appraisals reflect actual utility rather than outdated estimates.
Impact on Residents and Investors
For Homeowners
The majority of Thai residents who own a single primary residence valued below 50 M baht or use land strictly for agricultural purposes remain exempt from the Land and Building Tax. For example, a Bangkok condo owner whose primary residence is valued at 35 M baht will see no tax increase. However, anyone holding multiple properties—a second condo, an inherited plot, a rental unit—will see annual tax bills climb proportionately. A homeowner with a rental property valued at 30 M baht could face a 10-15% increase in annual Land and Building Tax depending on the appraisal adjustment in their area. Transfer fees, calculated as a percentage of the appraised value, will also rise for transactions completed in 2027 and beyond, effectively adding a one-time surcharge to purchases.
For Developers and Large Landholders
Property developers face a more pronounced squeeze. With inventories already elevated and financing costs high, the Treasury's revaluation will inflate annual tax liabilities on unsold stock. While industry representatives have warned that the timing is unfavorable, given the current slowdown in Thailand's real estate sector, Treasury officials argue the adjustment is necessary for fiscal stability and regional competitiveness. The government emphasizes that modernized appraisals align Thailand with international standards and support long-term market health, even as developers urge consideration of phased implementation or relief measures to address immediate inventory pressures.
For Borrowers
The flip side is improved access to credit. Banks that underwrite mortgages or business loans secured by land typically lend a fixed percentage of the official appraisal. Raising that baseline by 10-15 percentage points translates to proportionally larger loan approvals, a potential boon for small-business owners, farmers, and first-time buyers who lack alternative collateral.
D-Value Platform Goes Live
In conjunction with the policy shift, the Thailand Treasury Department this month rolled out D-Value, a digital service accessible via assessprice.treasury.go.th and the TRD Property Valuation mobile app. Users can search by satellite map, place name, or landmark—even without a title deed number—and receive a certified electronic copy of the appraisal account within approximately 10 minutes, free of charge. The documents carry an official digital signature and are accepted by participating financial institutions, streamlining loan applications and due diligence.
The platform operates around the clock, a marked improvement over the previous paper-based system that required in-person visits to district land offices. For foreign investors, expats managing multiple holdings, or attorneys handling estate settlements, the shift to instant digital certification removes a longstanding friction point.
Revenue and Economic Stability Considerations
While the Treasury casts the adjustment as a modernization effort, it also serves a fiscal purpose. Higher appraisals mean increased revenue from the Land and Building Tax, introduced in 2020 to replace the outdated house-and-land tax regime, as well as from transfer fees and Specific Business Tax on commercial transactions. With Thailand navigating a fragile post-pandemic recovery and elevated public debt, the incremental revenue gain is not trivial.
What You Should Do Now
As the 2027 deadline approaches, property owners and investors should take several practical steps:
Check your current appraisal: Use the free D-Value platform to review how your property is currently valued. This baseline will help you model the potential impact of the new appraisals.
Consult a tax advisor: If you hold multiple properties or are a developer, discuss the upcoming changes with a tax specialist who can project your 2027-2030 tax liability based on historical appraisal trends in your area.
Consider transaction timing: If you are planning to buy or sell property, evaluate whether completing the transaction before January 1, 2027, aligns with your financial situation, as transfer fees will be calculated on the new appraisals starting that date.
Understand appeal processes: If you believe your property has been overvalued due to encumbrances, restricted access, or environmental constraints, familiarize yourself with the Treasury's online appeal portal. The new appraisals will be published by early December, giving you roughly four weeks to file objections before implementation.
What Comes Next
The new appraisal schedule will be published in its entirety by early December, giving property owners and businesses roughly four weeks to model the financial impact before the rates take effect. Landowners who believe their parcel has been overvalued can file appeals through the Treasury's online portal, though the burden of proof rests with the claimant.
For anyone transacting in Thailand's property market over the next four years, the shift represents a structural change. Whether you are refinancing a mortgage, completing a sale, or calculating annual tax exposure, the gap between official appraisal and market reality is narrowing—and the cost of that convergence will be distributed across buyers, sellers, and holders alike.
