20 oz Imperium Silver Bar

The Scottsdale Mint 20 oz Imperium "XX" Cast Silver Bar

The 20 oz Imperium is a cast .999 fine silver bar from Scottsdale Mint of Scottsdale, Arizona, the largest size below the kilo in the mint's Imperium Collection. Each bar in the collection carries a Roman numeral matching its weight, so the 20 oz bar is stamped XX, alongside the Scottsdale lion hallmark and the weight and purity marks. The naming system is unique in the bullion market, where bars are almost always labelled in plain Arabic numerals, and it gives the line a cohesive identity from the 5 oz "V" up to the 1 kilo "M".

The bars are produced by V-Cast vacuum casting rather than machine striking. Molten silver is drawn into moulds under vacuum pressure, which produces consistent dimensions but leaves ripples and subtle surface imperfections, so no two bars share the same texture. The reverse is deliberately left blank to show the raw poured surface. The result sits between fully hand-poured bars, which are irregular in shape, and struck bars with their uniform mirror finishes; buyers who like the artisanal cast aesthetic get it here without the shape inconsistency of true hand pours.

At 622 grams, the 20 oz weight itself is a non-standard size produced by fewer refiners than the usual 10 oz or 100 oz formats. Premiums on 20 oz silver bars typically run 3-5% over spot, only marginally better than 10 oz bars, so the case for this size is mostly convenience (fewer bars to track) and the design rather than cost efficiency. The bar is not legal tender and carries no face value; it trades at or near melt value on the secondary market like other private-mint silver.

Imperium XX Bar Specifications

The full Imperium Collection runs to five sizes: 5 oz (V), 10 oz (X), 15 oz (XV), 20 oz (XX), and 1 kilo (M), all cast .999 fine silver with the same design language. The 15 oz XV is an oddity in its own right, a weight almost no other refiner produces. The bars carry no serial numbers and ship without assay cards; instead, the unique casting texture on each bar acts as a de facto anti-counterfeiting feature, since the surface pattern cannot be reproduced. No standard tube or multi-bar packaging convention exists at the 20 oz weight.

Tax Treatment of the 20 oz Imperium Silver Bar

As a .999 fine private-mint silver bar with no legal tender status, the Imperium XX follows standard silver bullion tax rules.

• US: the primary market for this bar. No federal sales tax; most states exempt bullion, while some tax it or apply purchase thresholds. Long-term capital gains are taxed at the collectibles rate of up to 28%. The bar meets the .999 fineness requirement for precious metals IRAs, though custodians keep their own approved product lists.
• UK: 20% VAT on purchase, and no CGT exemption on sale since the bar is not UK legal tender. This double tax burden makes silver bars the least tax-efficient silver format for UK buyers.
• Canada: GST/HST exempt; the bar's 99.9% purity clears the federal 99.9% threshold for refined silver in bar form.
• Australia and New Zealand: GST-free as investment-grade silver at 99.9% purity.
• EU: full national VAT rate applies to new silver bars, typically 17-27%.
• Singapore and Hong Kong: Singapore exempts qualifying investment silver from GST; Hong Kong has no sales tax. Neither taxes capital gains.

Imperium vs Stacker, PAMP, and Vintage Cast Bars

Within Scottsdale Mint's own range, the closest alternative is the Stacker series, also cast bars from the same mint. The functional difference is that Stackers interlock for neat stacking while Imperium bars do not; the Imperium is the choice when the raw cast look matters more than storage geometry, since cast bars with irregular surfaces never stack as tidily as minted ones.

Against machine-struck bars the contrast is sharper. PAMP Suisse bars come with mirror finishes and assay certificates, and Royal Canadian Mint bars add serial numbers; the Imperium has neither serials nor assay cards. Those features matter for buyers who prioritise documented chain of custody, while the Imperium targets buyers who prefer the artisanal poured aesthetic over Swiss precision. Vintage cast bars from Engelhard and Johnson Matthey offer a similar look but command collector premiums; the Imperium delivers the cast aesthetic at ordinary modern bullion pricing.

On size, the practical rivals are up and down the weight ladder rather than across brands. A pair of 10 oz silver bars costs about the same in premium terms and sells faster, because 10 oz is a standard size every dealer quotes. The 1 kilo Imperium "M" bar pushes further toward cost efficiency within the same design family. The 20 oz format is almost exclusively North American; European and Asian markets trade metric weights, so resale outside the US and Canada is thinner. Recognised hallmarks like the Scottsdale lion resell more easily at this non-standard weight than unknown private-mint bars do.