Thailand’s New Polymer Banknotes: The 50 Baht and 100 Baht Edition (2025)
Thailand’s Bank of Thailand (BOT) is modernizing its currency with durable, eco-friendly polymer (plastic) banknotes, which last up to four times longer than paper ones while featuring enhanced security like holograms and transparent windows. The latest rollout focuses on smaller denominations to reduce counterfeiting and environmental impact. Official sources confirm the November 2025 release is for 50 Baht and 100 Baht polymer notes. The 20 Baht was the pioneer in this series.
Key Features of the New 50 Baht and 100 Baht Polymer Notes
These Series 17 notes retain the same size, color scheme, and designs as their paper predecessors but switch to polymer substrate for better longevity and hygiene. Highlights:
- Designs:
- 50 Baht: Front features King Rama X (Maha Vajiralongkorn); back shows the Temple of the Emerald Buddha (Wat Phra Kaew) and a guardian giant.
- 100 Baht: Front with King Rama X; back depicts the Grand Palace and a mythical naga serpent.
- Security Features: See-through window with metallic effects, holograms, raised ink for the blind, and UV-fluorescent elements.
- Size: 50 Baht (72 x 144 mm); 100 Baht (72 x 144 mm).
- Environmental Benefit: Polymer notes are recyclable and reduce paper usage (saving trees and water).
- Coexistence: Old paper notes remain legal tender indefinitely—no rush to exchange.
| Denomination | Front Design | Back Design | Size (mm) | Durability vs Paper |
|---|---|---|---|---|
| 50 Baht | King Rama X | Wat Phra Kaew & guardian giant | 72 x 144 | 4x longer |
| 100 Baht | King Rama X | Grand Palace & naga serpent | 72 x 144 | 4x longer |
When Did They Go into Circulation?
The new 50 Baht and 100 Baht polymer banknotes were officially issued on 21 November 2025. They became available through all banks and ATMs nationwide on that date, with a gradual rollout. The BOT printed millions initially, and by December 2025, they’re widely circulating alongside paper versions. Public reaction has been positive, with many appreciating the “crisp feel” and reduced wear.
Thailand’s 50 Baht Note: Old Paper vs New Polymer 2025 – Side-by-Side Comparison
The old paper 50 Baht note and the new polymer version (released November 2025) look very similar at first glance—both feature King Rama X on the front and the same overall design theme. However, the polymer note has a slightly brighter, more vibrant blue color overall (due to the plastic substrate reflecting light differently and modern printing), making it stand out as “cleaner” and newer-looking.Key Differences (Old Paper vs New Polymer 50 Baht)
| Aspect | Old Paper Note | New Polymer Note (2025) | Notes |
|---|---|---|---|
| Material | Cotton-paper blend | Durable polymer (plastic) substrate | Polymer lasts ~4x longer, resistant to moisture/dirt. |
| Color Tone | Muted, softer blue | Brighter, more vibrant blue | Your observation – polymer gives a “shinier” look. |
| Feel/Texture | Soft, matte, folds easily | Smooth, slightly slippery, crinkly sound | Polymer feels “plastic-like”; harder to tear. |
| Transparent Window | None | Clear see-through window with embossed “50” | Major new security feature; visible from both sides. |
| Security Features | Watermark, security thread, microtext | + Color-shifting ink, hologram, raised tactile lines for visually impaired | Enhanced anti-counterfeiting. |
| Durability | Wears quickly (tears, dirt) | Highly durable (up to 8 years lifespan) | Reduces need for replacements. |
| Design Theme | Identical (King Rama X front; historical kings back) | Identical overall, but sharper print | No major artwork changes. |
Both notes are the same size (144 × 72 mm) and remain legal tender indefinitely. The polymer version is part of Thailand’s gradual shift (started with 20 Baht in 2022) for sustainability and security.
How Long Since They Issued the 20 Baht Note?
Thailand’s first polymer note—the 20 Baht—was issued on 24 March 2022. That means the 50 and 100 Baht notes came over 3.5 years later (from March 2022 to November 2025). The 20 Baht was a test run for polymer tech, featuring King Rama X on the front and Wat Phra Si Rattana Mahathat on the back. It proved successful (low counterfeiting, high durability), paving the way for the 2025 expansion to smaller denominations.
Plans for 500 Baht and 1000 Baht Polymer Notes
No official release date has been announced yet for polymer versions of the 500 Baht or 1000 Baht notes.
The BOT’s current focus is on low-denomination notes (20, 50, 100 Baht) due to their high circulation volume and wear. Larger notes like 500 and 1000 (which feature King Rama IX and economic themes) remain in paper form for now, as polymer adoption is phased.
- Timeline Speculation: Based on BOT statements, polymer for higher denominations could come in 2026–2028, starting with 500 Baht (most used mid-value). A 2025 social media post mentioned potential April 2026 for 500/1000, but it’s unconfirmed.
- Rationale: Larger notes see less physical handling, so paper suffices; polymer prioritizes high-turnover bills. The BOT aims for full polymer by 2030 for sustainability.
- Status: Paper 500/1000 remain legal tender. If polymerized, expect similar designs with added security (e.g., advanced holograms).
For the latest, check the BOT website (bot.or.th). Thailand’s polymer shift mirrors Australia’s success—durable, clean, and counterfeiting-resistant. Got more questions on Thai currency or travel tips? Let me know!
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