Gold Bar Denominations
Also: bar size, bar weight, denomination weight
The denomination of a gold bar describes its standardised weight and largely determines premium, liquidity and suitability for various investment strategies.
The gold bar denomination defines the weight format in which a gold bar is produced and traded. It is not merely a product feature but determines premium, resaleability and tax treatment. Anyone buying investment gold should know the common formats and their respective advantages and disadvantages.
Overview of common formats
| Weight | Fine weight (approx.) | Typical premium* | Target group |
|---|---|---|---|
| 0.1 g | 0.10 g | 30–60% | Gift, first investment |
| 0.5 g | 0.50 g | 15–30% | Small investor |
| 1 g | 1.00 g | 8–18% | Small investor |
| 5 g | 5.00 g | 4–10% | Private investor |
| 10 g | 10.00 g | 3–7% | Private investor |
| 1 oz (31.1035 g) | 31.10 g | 2–5% | Standard format |
| 50 g | 50.00 g | 2–4% | Private investor |
| 100 g | 100.00 g | 1.5–3% | Private investor |
| 250 g | 250.00 g | 1–2.5% | Investor / commercial |
| 500 g | 500.00 g | 0.8–2% | Investor / commercial |
| 1 kg | 1,000.00 g | 0.5–1.5% | Institutional |
| 12.5 kg (400 oz) | 12,441 g | < 0.5% | Central banks / LBMA |
*Premium on the spot price is indicative and fluctuates depending on dealer and market situation.
Weight units and conversion
Gold bars are stated in two unit systems:
- Grams / kilograms – predominant in Europe and Asia (e.g. 1 g, 10 g, 100 g, 1 kg)
- Troy ounces (troy oz) – internationally dominant, especially in the English-speaking world (1 oz = 31.1035 g)
You can determine the spot price in pounds per gram at any time with the unit converter. You will find the current gold price on the gold price page.
Material value = weight (g) × fineness (‰) ÷ 1000 × gold price (£/g)
For a quick calculation use the melt value calculator.
Why the premium falls with size
The premium (agio) on the spot price is considerably lower for larger bars, because:
- Fixed costs (stamping, packaging, certificate, assay card) are spread over more gold weight.
- Refinery and dealer negotiate bulk quantities at more favourable manufacturing terms.
- Liquidity of large standard formats (100 g, 1 kg) is higher – the market is deeper.
A 1 g bar can therefore cost 15% premium, while a 1 kg bar lies only 1–1.5% above spot. On selling the reverse situation arises: small formats often achieve proportionally less, because dealers calculate higher purchase discounts. You can determine the achievable price with the purchase price calculator.
Tax aspects (no tax or investment advice)
Investment gold is exempt from VAT in the United Kingdom (HMRC; Directive 2006/112/EC) – regardless of the denomination, provided the fineness of the bar is at least 995‰. Common bars reach 999.9‰ and comfortably meet this requirement. On disposal, Capital Gains Tax may apply to gold bars above the annual exempt amount: the gain equals disposal proceeds minus acquisition cost. There is no German-style one-year speculation period. For tax questions please consult an accountant.
Minted vs. cast bar
The denomination also influences the manufacturing form:
- Cast bars: typically from 100 g upwards, rough structure, lower premium.
- Minted bars: finer surface, more uniform dimensions, preferred in small denominations (1 g – 100 g), often come in the certified bar (blister) with certificate of authenticity.
In brief
The larger the denomination, the lower the premium and the better the liquidity – the smaller, the more flexible the investment and the higher the relative costs. For most private investors, 1 oz and 100 g bars offer the best ratio of flexibility and cost efficiency.