10 oz Perth Mint Koala Platinum Coin

The 10 oz Platinum Koala from Perth Mint

The 10 oz Platinum Koala is among the largest platinum coins ever produced for the bullion market, containing 311.035 grams of 999.5 fine platinum. Carrying a face value of A$1,000 as Australian legal tender, this coin was added to the Platinum Koala range in 1991, three years after the programme's debut. It was struck alongside the 2 oz and 1 kg denominations as extensions of the original 1/20 oz through 1 oz range. Production ended in 2000 along with the rest of the Platinum Koala series.

A 10 oz platinum coin is an unusual product. The combination of platinum's high density (21.45 g/cm3) and the sheer weight of 311 grams produces a coin that feels noticeably heavy and compact in the hand. At 60.3 mm diameter and 7.90 mm thick, it is comparable in size to a drinks coaster but far heavier than anything of similar dimensions in gold or silver. Few sovereign mints have ever attempted this denomination in platinum, making the 10 oz Koala a genuine rarity.

The coin shares the annual design changes that defined the Platinum Koala programme. Each year from 1991 to 2000, a new reverse depicted koalas in natural bush settings, meaning only ten design variants exist for this denomination. With the series discontinued and mintages that were small even during active production, the 10 oz Platinum Koala is a scarce item on the secondary market. Perth Mint processed over 18 tonnes of platinum across the entire Koala programme, with 85% sold internationally.

10 oz Platinum Koala Specifications

The 10 oz was introduced alongside the 2 oz and 1 kg denominations in 1991, expanding the original fractional-to-1 oz range into larger formats. The 60.3 mm diameter is substantially bigger than the 1 oz version (32.1 mm), allowing the annual koala design to be rendered in fine detail. The coin was supplied in Perth Mint packaging with a protective capsule appropriate for its size.

Platinum's density means the 10 oz coin is physically smaller than a 10 oz silver coin would be. A 10 oz silver bar typically measures roughly 84 mm x 49 mm x 8 mm, while this platinum coin is circular at 60.3 mm, illustrating platinum's compactness as a store of value.

Tax Treatment of the 10 oz Platinum Koala

At 10 troy ounces, this coin represents a significant capital value. Tax treatment follows the same rules as smaller Koala denominations, but the absolute tax amounts become substantial.

• Australia: GST-free as investment-grade platinum. CGT on disposal with a 50% discount for holdings over 12 months. At the value of 10 oz of platinum, proper CGT record-keeping (purchase date, price, disposal price) becomes particularly important.
• United States: IRA-eligible (Platinum Koala specifically listed). The 28% collectibles CGT rate can represent a significant tax bill on 10 oz of platinum. Some US states with threshold-based sales tax exemptions (California over $2,000, Florida over $500) will comfortably clear the threshold at this denomination.
• United Kingdom: 20% VAT on purchase represents a very large absolute cost at 10 oz. Subject to CGT on disposal. UK buyers with this budget may prefer the 1 oz Platinum Britannia (buying ten individual coins), which avoids CGT. The annual CGT allowance (currently GBP 3,000) may offset only a fraction of the gain on 10 oz of platinum.
• Canada: GST/HST exempt at 99.5%+ purity. Capital gains at the 50% inclusion rate.
• New Zealand: GST-exempt. No CGT. An attractive jurisdiction for high-value platinum purchases.
• Singapore: GST-exempt as IPM. No CGT.
• Hong Kong: Fully tax-free.
• South Africa: 15% VAT on 10 oz of platinum is a large amount. No exemption.

10 oz Platinum Koala vs Large Platinum Alternatives

Very few platinum coins exist at the 10 oz weight. The Platinum Koala is one of the only sovereign-minted platinum coins ever produced at this denomination, which limits direct comparisons. The more common route to accumulating 10 oz of platinum is through ten 1 oz platinum coins (Eagles, Maple Leafs, Britannias, or Kangaroos) or through 10 oz platinum bars from refiners such as PAMP Suisse, Valcambi, or Heraeus.

Buying a single 10 oz coin versus ten 1 oz coins involves significant tradeoffs. The 10 oz coin should carry a lower premium per ounce because it involves one striking operation rather than ten. It also takes up less space and creates a single audit item for record-keeping. The downside is liquidity: selling 10 oz of platinum in one transaction requires finding a buyer willing to commit at that level. Ten individual 1 oz coins can be sold separately over time, which provides much more flexibility in a platinum market where large single-lot sales can be slow to match.

Against 10 oz platinum bars, the Koala coin has the advantages of legal tender status, government-guaranteed weight and purity, and the annual design variety that gives each year-date individual character. Bars from LPPM-accredited refiners counter with slightly lower premiums (the gap between bar and coin premiums is narrower in platinum than in gold) and broader institutional acceptance.

The Koala's closed-series status adds a dimension that no current production item can match. With only ten possible year-dates (1991-2000) and small mintages per date, the 10 oz Platinum Koala combines bullion value with numismatic scarcity. For buyers who view platinum as a long-term hold, this fixed-supply characteristic may be attractive alongside the industrial supply deficit that has characterised the platinum market since 2023.