Thailand is switching to plastic money: new polymer baht notes will be more durable, more hygienic and far better suited to the country’s tropical climate. DIP explains how to spot fakes and what the transition means for travelers.
The Bank of Thailand has officially announced the introduction of new 50- and 100-baht polymer banknotes starting November 21, 2025. According to information obtained by DIP, these notes will gradually replace their paper counterparts and form part of Thailand’s updated banknote series. The goal: improved longevity and cleanliness of cash in hot and humid conditions.
Polymer is far stronger than traditional paper. It resists moisture, dirt and wear, making banknotes cleaner and more resilient. Since they last longer, polymer notes also reduce the environmental impact of producing new cash.
However, during the transition period — while old and new notes circulate together — the risk of counterfeits remains. DIP offers practical guidance for visitors.
How to avoid counterfeit money in Thailand
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Check the material: polymer notes have a transparent window and a firm, smooth texture.
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Hold the note up to the light: authentic banknotes show clear watermarks.
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Look for the security thread: it should appear as a dark stripe with microtext.
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Inspect microprinting with a magnifier.
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Compare suspicious notes with those you trust.
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Be extra careful at markets and small shops.
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Avoid accepting damaged banknotes.
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If in doubt, visit a bank for verification.
Countries that have already adopted polymer banknotes
Australia — the pioneer since 1988; saw fewer counterfeits and longer-lasting banknotes.
Canada — reduced production and recycling costs; polymer withstands extreme temperatures.
United Kingdom — polymer notes last 2.5 times longer than paper.
Vietnam — especially effective for lower denominations.
Singapore — improved hygiene and lower operating costs.
Advantages of polymer banknotes
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Last 2–4 times longer
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Resistant to moisture and dirt
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Harder to counterfeit
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Lower long-term costs
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More hygienic
Disadvantages
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Higher production cost
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More difficult to recycle
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Can deform under high heat
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Requires adaptation from the public
According to DIP, Thailand’s transition to polymer currency will bring more benefits than drawbacks. Just stay attentive, check your cash and enjoy a safe and pleasant trip.