Bullion Coin
Also: Investment coin, Bullion Coin, Bullion money
A state-minted coin that serves primarily as a precious-metal investment and whose value is based on the current metal price (spot) plus a premium.
A bullion coin (from Old French bouillon = melting pot) is a coin struck by a state or state-authorised mint whose purchase price derives predominantly from the current precious-metal spot. Unlike a numismatic collector's coin, a bullion coin is not defined by rarity or grade of preservation but by its pure metal value. Bullion coins exist in gold, silver, platinum and palladium and are regarded worldwide as one of the most traded physical investment products.
Characteristics and distinction
Bullion coins share four core properties:
- State minting seal — they carry a legal face value (e.g. €100 for the Vienna Philharmonic), but this lies far below the metal value and merely establishes legal tender status.
- Defined fineness and fine weight — each strike guarantees an exact amount of pure metal, often 1 troy ounce (31.103 g), but also ½ oz, ¼ oz, 1/10 oz as well as 1 kg or 1 g.
- Market-linked price — the dealer price results from spot + premium (agio); the premium covers minting, distribution and dealer costs.
- High liquidity — world-famous bullion coins are bought back at any time by dealers, banks and mints.
They differ from collector's coins (numismatics, proof quality) by their mass mintage (millions per year) and the absence of a collector's premium. They differ from bars through the state minting seal and face value, which in some countries confers tax advantages.
The most important bullion coins at a glance
| Coin | Origin | Metal | Fineness | Introduced |
|---|---|---|---|---|
| Krugerrand | South Africa | Gold | 916.7 ‰ (22 carat) | 1967 |
| Vienna Philharmonic | Austria | Gold / Silver | 999.9 ‰ | 1989 / 2008 |
| Maple Leaf | Canada | Gold / Silver | 999.9 ‰ | 1979 / 1988 |
| American Eagle | USA | Gold / Silver | 916.7 ‰ / 999 ‰ | 1986 |
| American Buffalo | USA | Gold | 999.9 ‰ | 2006 |
| Britannia | United Kingdom | Gold / Silver | 999.9 ‰ | 1987 / 1997 |
| Kangaroo / Nugget | Australia | Gold | 999.9 ‰ | 1986 |
| Panda | China | Gold / Silver | 999.9 ‰ | 1982 |
The Krugerrand holds a special position: as the world's first modern gold investment coin, it contains exactly 1 troy ounce of gold, but is struck from a 22-carat alloy (916.7 ‰), which is why its gross weight of 33.93 g exceeds the standard of 31.103 g. The added copper makes it more scratch-resistant.
Price formation and premium
The purchase price of a bullion coin is calculated as follows:
Purchase price = spot (per troy ounce) × fine weight + premium (£ or %)
The premium varies by coin, denomination and market situation. Small denominations (1/10 oz) carry a higher premium than the 1 oz standard coin, because minting costs per gram of fine metal rise. In times of crisis or supply shortages, premiums on gold can briefly rise to 10–15% and on silver to over 50%.
With the gold calculator, the current material value of a bullion coin can be determined quickly; the melt value calculator is additionally suitable for coins with a fineness deviating from 999.9 ‰, such as the Krugerrand.
Tax treatment in the United Kingdom
Not investment or tax advice — the following is general factual information.
In the UK, gold coins that meet HMRC's investment-gold coin criteria are exempt from VAT. Furthermore, UK legal-tender coins from The Royal Mint (Sovereign, Britannia, Lunar, Queen's Beasts) are exempt from Capital Gains Tax (CGT) with unlimited gains — a significant advantage. Silver and platinum coins are subject to the full VAT rate of 20%, which considerably increases their effective premium compared with gold coins.
Gains from the sale of non-legal-tender coins and gold bars may be subject to CGT above the annual exempt amount (gain = disposal proceeds − acquisition cost). There is no German-style one-year speculation period — this should be clarified with a tax adviser in individual cases.
Authenticity check
Since bullion coins are high-grade metals in compact form, counterfeits exist. Reliable test methods include:
- Weight and dimensions: every coin has an exactly defined gross weight and diameter. The coin weight checker compares actual and target values.
- Ping test: genuine gold coins produce a characteristic bright ring when tapped.
- Density determination: gold has a density of 19.32 g/cm³ — tungsten counterfeits come close (19.25 g/cm³) but are exposed by precise density measurement (Archimedes' principle).
- Sigma Metalytics / XRF: contactless measurement of electrical resistance or X-ray fluorescence provides the most reliable proof.
Storage and safekeeping
Bullion coins should be kept in their original capsules or coin tubes to avoid scratches — even though scratches do not reduce the material value, they lower the resale price with some dealers. For larger holdings, bank safe deposit boxes or certified bonded warehouses are recommended.
In brief
Bullion coins combine a state guarantee of fineness and fine weight with the ability to liquidate at any time at the daily price. Anyone wishing to buy physical precious metals will find in the 1 oz bullion coin the most liquid and most easily verifiable standard product of the global precious metals market.