About the Bullion Premium Calculator
Every bullion coin or bar sells for more than the value of the metal inside it. This bullion premium calculator shows exactly how much more: enter the spot price, the product’s fine metal weight and the price a dealer is asking, and it returns the premium per piece, per troy ounce and as a percentage of melt value.
It is built for comparing offers — a sovereign-minted 1 oz coin against a generic bar, fractional coins against full ounces, or one dealer against another. Add a quantity to see the total premium on an order, and enter what the dealer would pay you back (as a percentage over or under spot) to find the break-even spot price you need before selling makes money.
The calculation works for gold, silver, platinum or palladium as long as the spot price and the product weight refer to the same metal. Use the product’s fine (pure) metal content, not its gross weight: a 1 oz American Gold Eagle weighs 33.93 g but contains exactly one troy ounce of gold.
With the default inputs, the premium over spot is 4.5%. Change any value above to recalculate instantly.
How to use the bullion premium calculator
- 1Enter the current spot price of the metal.
- 2Choose the product size, or enter a custom fine weight in troy ounces.
- 3Enter the dealer’s price per piece, including fees you will pay.
- 4Set the quantity and, optionally, the dealer’s buyback level relative to spot.
- 5Compare the premium percentage across products and dealers.
Formula and method
The melt value of one piece is its fine metal weight w in troy ounces times the spot price S. The premium is the asking price P minus melt, shown per piece, per ounce (premium ÷ w) and as a percentage of melt.
If a dealer will buy the product back at spot adjusted by b (for example −2% or +3%), you receive w × S′ × (1 + b) when spot is S′. Setting that equal to the price you paid gives the break-even spot price, and comparing it with today’s spot shows the percentage rise required before a sale returns your money. Sales tax, shipping and storage are not included unless you add them to the price.
- w
- Fine metal per piece in troy ounces
- S
- Spot price per troy ounce
- P
- Price paid per piece
- b
- Dealer buyback premium (+) or discount (−) vs spot
Worked examples
Five 1 oz gold coins at $4,180 with spot at $4,000
Each coin holds $4,000 of gold, so the $180 difference is a 4.5% premium. Five coins cost $20,900 including $900 of premium. Selling back at spot, gold must reach $4,180 (+4.5%) to break even.
1/10 oz gold coin at $455
A tenth-ounce coin contains $400 of gold, so paying $455 is a 13.75% premium — $550 per ounce of gold, versus $180 on the 1 oz coin. Fractional coins cost more per ounce.
100 silver Eagles at $56 with spot $50, 2% under-spot buyback
Each 1 oz coin is worth $50 in silver, so $56 is a 12% premium; on 100 coins that is $600. If a dealer will pay 2% under spot, silver must reach $56 ÷ 0.98 = $57.14 (+14.29%) to break even.
Frequently asked questions
What is a bullion premium?+
The premium is the amount a coin or bar costs above the value of its metal at spot. It covers minting, distribution, dealer overhead and profit, and it rises when demand for physical metal is high.
What is a normal premium over spot for gold?+
For 1 oz gold bars and common coins, premiums are often in the low single digits as a percentage, with sovereign coins like Eagles and Maple Leafs a little higher. Fractional coins and collectible issues carry much larger premiums.
Why are silver premiums higher than gold premiums?+
Minting, shipping and handling costs are similar per piece, but a 1 oz silver coin is worth far less than a 1 oz gold coin, so those fixed costs are a much bigger percentage of its value.
Do I get the premium back when I sell?+
Usually only partly. Dealers buy back popular coins near or slightly above spot and generic bars at or below spot, so most of the premium you paid is lost unless the metal price rises.
Is it better to buy bars or coins?+
Larger bars generally have the lowest premium per ounce. Government coins cost more but are widely recognised, easier to sell in small amounts and may have favourable tax treatment in some countries.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.