Bullion Coin
Also: Investment coin, Bullion coin
A state-minted coin held primarily as a precious-metal investment, whose value tracks the current metal price (spot) plus a premium.
A bullion coin (from the Old French bouillon, meaning melting pot) is a coin struck by a state or state-authorised mint whose purchase price is derived overwhelmingly from the current precious-metal spot price. Unlike a numismatic collector coin, a bullion coin is defined not by rarity or condition but by its pure material value. Bullion coins exist in gold, silver, platinum and palladium and rank among the most heavily traded physical investment products worldwide.
Characteristics and distinctions
Bullion coins share four core traits:
- State minting seal — they carry a legal face value (for example €100 on the Vienna Philharmonic) that sits far below the metal value and merely establishes their legal-tender status.
- Defined fineness and fine weight — every strike guarantees an exact quantity of pure metal, frequently one troy ounce (31.103 g), but also 1/2 oz, 1/4 oz, 1/10 oz as well as 1 kg or 1 g.
- Exchange-linked price — the dealer price is spot plus a 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.
Bullion coins differ from collector coins (numismatics, proof quality) through their mass issuance (millions of pieces a year) and the absence of a collector premium. They differ from bars through the state minting seal and the face value, which in some countries grants them 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 place: as the world's first modern gold investment coin it contains exactly one troy ounce of gold, yet is struck from a 22-carat alloy (916.7), which is why its gross weight of 33.93 g exceeds the 31.103 g standard. The added copper makes it more scratch-resistant.
Pricing and premium
The purchase price of a bullion coin follows this scheme:
Purchase price = spot (per troy ounce) × fine weight + premium (€ or %)
The premium varies by coin, denomination and market conditions. Smaller 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 climb to 10–15 % and on silver above 50 %.
The gold calculator quickly establishes the current material value of a bullion coin; the melt value calculator is also handy for coins whose fineness differs from 999.9, such as the Krugerrand.
Tax treatment in Ireland
Not investment or tax advice — the following is general factual information.
In Ireland, gold coins meeting the criteria for investment gold (fineness of at least 900, minted after 1800, legal tender in the country of origin) are exempt from VAT under the VAT Consolidation Act 2010, Schedule 1, in line with EU Directive 2006/112/EC (articles 344–356). Silver and platinum coins, by contrast, attract the standard Irish VAT rate of 23 %, which raises their effective premium markedly compared with gold coins.
A profit from selling physical bullion coins held privately is liable to Capital Gains Tax at 33 %, after the annual personal exemption of €1,270. Ireland grants no holding-period relief — the duration of ownership does not affect the liability. Individual circumstances should be clarified with a qualified adviser.
Authenticity testing
Because bullion coins pack valuable industrial metal into a compact form, forgeries exist. Reliable test methods include:
- Weight and dimensions: every coin has a precisely defined gross weight and diameter. The coin weight checker compares the actual and target figures.
- Ping test: genuine gold coins produce a characteristic bright ring when tapped.
- Density measurement: gold has a density of 19.32 g/cm³ — tungsten forgeries 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 dependable 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 at some dealers. For larger holdings, bank safe-deposit boxes or certified bonded warehouses are advisable.
In brief
Bullion coins combine a state guarantee of fineness and fine weight with the ability to be liquidated at any time at the day's price. Anyone looking to buy physical precious metal will find in the 1 oz bullion coin the most liquid and easily verifiable standard product of the global market.