Royal Thai Mint: History Guide

Thailand's coinage tells the story of a kingdom modernising while keeping its traditions. This guide covers the key moments in Royal Thai Mint history, from bullet money to today's high-security production, and explains why minting matters for national identity.

Key takeaways

Before 1860, Siam used pod duang, small bent silver bars known as bullet money.
The first machine mint opened in the Grand Palace in 1860 under King Mongkut (Rama IV).
Today the Royal Thai Mint operates in Pathum Thani under the Treasury Department of the Ministry of Finance.
The mint makes coins, medals and royal decorations. Banknotes are printed separately by the Bank of Thailand.

Before the mint: pod duang

For centuries, Siamese money took the form of pod duang: small silver bars bent into a rounded shape and stamped with official marks. They were hard to copy by machine but slow to produce, and as trade with Europe grew in the 19th century, Siam needed a faster, more modern system.

Royal Thai Mint history: a timeline

Year	Milestone
1860	Rong Krasap Sitthikan, the first mint, opens in the Grand Palace under King Mongkut (Rama IV), producing flat machine-struck coins.
1875	The mint moves to a larger building, today the site of the Wat Phra Kaew Museum.
1902	A new mint opens on Chao Fa Road, now home to the National Gallery.
1904	Under King Chulalongkorn (Rama V), pod duang are withdrawn as legal tender.
1972	The mint moves to Pradiphat Road in Bangkok.
2002–2003	Production moves to Khlong Luang, Pathum Thani. The new mint is officially opened on 2 July 2003.

Design and security over time

From bars to flat coins

Machine striking brought round coins with consistent weight, royal emblems and clear denominations.

Royal portraits

Coins began to carry the portrait of the reigning king, a tradition that continues on every reign's coinage.

Modern alloys and shapes

Bi-metallic 10 baht coins and modern alloys improved durability and made counterfeiting harder.

Commemorative programmes

Royal anniversaries, national events and Buddhist themes are marked with gold, silver and base-metal commemoratives.

Coins, medals and banknotes: who makes what?

Many people assume the mint also prints banknotes, but the work is split:

Royal Thai Mint (Treasury Department): circulation coins, commemorative coins, medals and royal orders and decorations.
Bank of Thailand: issues and prints Thai banknotes at its own note printing works.
Both use security features, from fine detail and edge reeding on coins to watermarks and security threads on notes.

Why minting matters for national identity

Every coin is a small official portrait of the nation: the king, the royal emblem, temples and national symbols. Reliable coinage also builds everyday trust. People need to know that a coin is genuine and worth its face value, which is why security and quality control have always been at the heart of the mint's work.

Tips for collectors of Thai coins

✔Learn to read Thai numerals and Buddhist Era dates (BE = CE + 543).
✔Group coins by reign, from Rama IV to Rama X, for a clear collection structure.
✔Check commemoratives for original packaging and certificates.
✔Be careful with pod duang and early coins, which are widely faked.
✔Never clean coins, especially older silver pieces.

Collector tip: Starting with a full set of circulation coins from one reign is an affordable way to learn the series. Browse our Thai coins by reign.

Frequently asked questions

When was the Royal Thai Mint founded?

The first mint, Rong Krasap Sitthikan, opened in the Grand Palace in 1860 during the reign of King Mongkut (Rama IV).

Where is the Royal Thai Mint today?

At Khlong Luang in Pathum Thani province, north of Bangkok, where it has operated since 2002.

Does the Royal Thai Mint print banknotes?

No. Banknotes are issued and printed by the Bank of Thailand. The mint produces coins, medals and royal decorations.

Explore Thai coins and medals

Browse coins from every reign, commemoratives and medals at Asia Mint Collections.

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