Gold Bars: A Buyer's Guide to Sizes, Premiums, and What Actually Matters

Gold bars are the most efficient way to buy physical gold. They carry lower premiums than coins, come in more sizes, and strip away the numismatic markup that inflates the cost of government-issued products. But bars vary widely in size, refiner, and premium structure, and those differences determine how much gold you actually get for your money.

This guide covers every gold bar size available to retail investors in 2026, from 1 gram entry points to 1 kilo institutional bars, with the premium data and refiner context that matters at the point of purchase.

Gold Bar Sizes at a Glance

Size	Troy Oz Equivalent	Typical Premium	Best For
1 gram	0.032 oz	15 to 30%	Gifts, small-budget entry
2.5 gram	0.080 oz	10 to 20%	Fractional stacking
5 gram	0.161 oz	8 to 15%	Budget-conscious accumulation
10 gram	0.322 oz	5 to 10%	Mid-range fractional
20 gram	0.643 oz	3 to 7%	Bridge between gram and ounce
50 gram	1.608 oz	2.5 to 4.5%	Sweet spot for gram buyers
100 gram	3.215 oz	2 to 4%	Bulk fractional position
1 troy oz	1.000 oz	2 to 5%	Standard retail unit
10 troy oz	10.000 oz	1.5 to 3%	Serious accumulation
1 kilogram	32.151 oz	1 to 2.5%	Lowest premium per ounce

Premium ranges reflect typical dealer pricing in 2026 and shift with supply, demand, and gold spot price volatility. You can compare live dealer premiums on gold closest to spot at any time.

Gram Bars: 1g to 100g

Gram-weight gold bars are the entry point for investors who want to own physical gold without committing to a full troy ounce. They range from credit-card-thin 1 gram wafers to substantial 100 gram bars that hold over 3 troy ounces of gold.

The tradeoff is premiums. A 1 gram gold bar typically costs 15 to 30% over its melt value because the fixed costs of refining, assaying, packaging, and shipping are spread across a tiny amount of metal. At 5 grams, premiums compress to 8 to 15%. By 10 grams, they drop further to 5 to 10%. The gram bar premium curve flattens as the size increases, which is why experienced stackers who buy in gram weights tend to target 10 gram bars and above.

The 5 gram size is one of the most popular fractional bars because it balances accessibility with reasonable premiums. At roughly $1,300 to $1,400 at current spot prices, it is an achievable purchase for regular accumulation. The 10 gram bar offers better premium efficiency but requires roughly twice the capital per purchase.

For investors who want the lowest gram-bar premiums without jumping to troy-ounce pricing, 50 gram and 100 gram bars hit the sweet spot. A 50 gram bar carries about 35% lower premiums per gram than a 1 gram or 5 gram bar, and a 100 gram bar narrows the gap further.

One unique option in the gram space is the divisible gold bar (sometimes called a CombiBar), which is a single bar scored into individual gram segments that can be snapped apart and traded individually. Valcambi and other refiners produce these in various configurations, giving investors both the low premium of a larger bar and the flexibility of fractional pieces.

Troy Ounce Bars: 1 oz and 10 oz

The 1 oz gold bar is the standard retail unit for gold bullion. It contains exactly one troy ounce (31.1035 grams) of .9999 fine gold and carries premiums of 2 to 5% over spot, making it significantly cheaper per ounce than any gram-weight bar. For investors who can commit the capital (roughly $2,500 to $2,700 at current prices), the 1 oz bar is where the premium math starts working in your favor.

Secondary-market 1 oz bars (previously owned, still in assay) trade at even tighter premiums than new-production bars. These are often the most affordable gold bars available from any dealer. The gold content is identical; the discount comes from the bar having already been purchased once.

The 10 oz gold bar drops premiums further, typically to 1.5 to 3% over spot. At roughly $25,000 to $27,000 per bar, these are not entry-level purchases, but for investors building a serious position, the premium savings over 10 individual 1 oz bars add up quickly. A 2-point premium reduction on 10 oz of gold at $2,600 per ounce saves $520 per bar.

Kilo Bars

The 1 kilogram gold bar (32.151 troy ounces) carries the lowest retail premiums of any bar size, typically 1 to 2.5% over spot. At current prices, a kilo bar runs roughly $83,000 to $85,000, putting it firmly in the territory of high-net-worth investors, family offices, and institutional buyers.

Kilo bars are produced by every major refiner and are the standard unit for physical gold settlement on the Shanghai Gold Exchange. Their liquidity is strong among dealers who handle large transactions, though resale may take longer than with 1 oz bars simply because the buyer pool is smaller. For a detailed breakdown of sourcing, pricing, and logistics, see the full kilo bar buying guide.

Who Makes Gold Bars: The Major Refiners

Not all gold bars are created equal. The refiner stamped on the bar determines its liquidity, authentication features, and resale value. Four Swiss refineries dominate the global market and collectively process thousands of tons of precious metals annually.

PAMP Suisse is the most recognized name in gold bars. Its Lady Fortuna design is the most widely held bar motif in the world. PAMP processes roughly 450 tons of gold per year, serves as one of five LBMA Good Delivery referees, and includes a Veriscan anti-counterfeiting system that uses each bar’s unique surface topology as a fingerprint. PAMP also produces themed series, including the Lunar series and 2026 Year of the Horse bars.

Valcambi is the largest precious metals refiner in the world, processing over 2,000 tons per year. Based in Balerna, Switzerland, Valcambi is known for its CombiBars (divisible gold bars) and for producing bars for government mints, including the Royal Canadian Mint. Valcambi bars carry slightly lower premiums than PAMP in most markets.

Argor-Heraeus operates from Mendrisio, Switzerland and is another LBMA Good Delivery referee. Its Kinebar series uses a holographic security feature embedded in the bar. Argor-Heraeus bars are widely available in all standard sizes and are a frequent choice among European investors.

Perth Mint is the only government-owned refiner to compete directly with the Swiss houses in the retail bar market. Perth Mint bars carry the backing of the Government of Western Australia and include a micro-engraved security feature. They are widely distributed across Asia-Pacific and North American dealer networks.

Other LBMA-accredited refiners you will see in the market include Metalor (Switzerland), Heraeus (Germany), Rand Refinery (South Africa), Tanaka (Japan), and the Royal Canadian Mint. Any bar from an LBMA-accredited refiner meets the international standard for purity and assay accuracy, which means it trades at full value globally.

Gold Bars vs. Gold Coins

The question is not which is better. It is which is better for your specific goal.

Gold bars carry lower premiums than coins at every comparable size. A 1 oz gold bar typically trades 1 to 3 percentage points below a 1 oz Gold Eagle or Maple Leaf. That spread widens further at larger sizes: a 10 oz bar undercuts 10 individual coins by a wide margin. For investors focused purely on accumulating the most gold per dollar, bars win on cost.

Coins offer advantages bars do not. They carry legal tender status, are produced by sovereign mints with built-in authentication, and enjoy broader retail recognition. Coins are also easier to sell in small quantities; a single 1 oz Gold Eagle is more liquid than a single 100 gram bar in most retail settings. For a full side-by-side, see the coins vs. bars comparison. If your priority is sovereign-minted coins, see our guide to comparing government gold coins.

Costco Gold Bars

Costco became a major player in the retail gold market in 2023, and by late 2025 was selling an estimated $100 to $200 million in precious metals per month. Costco sells 1 oz gold bars (typically PAMP Suisse or Rand Refinery) at premiums that compare favorably to online dealers, particularly when combined with the 2% Executive membership and 2% Costco Visa cashback.

The model works differently from traditional bullion dealers. Costco sets a fixed daily price that does not change with intraday spot fluctuations, limits purchases to two bars per member per 24-hour period, and does not buy back metal. That means you need a separate dealer relationship for selling. For a detailed breakdown of the Costco gold buying experience, including how to stack Costco rewards on gold purchases, see the dedicated guides.

How Premiums Work

The premium over spot is the markup you pay above the current gold spot price. It covers the refiner’s production cost, the dealer’s margin, and market supply and demand dynamics. Three factors drive premium levels.

Size: Smaller bars cost more to produce per unit of gold, so premiums are highest on 1 gram bars and lowest on kilo bars. This is the single biggest determinant of what you pay over spot.

Refiner: PAMP Suisse bars carry a modest brand premium over Valcambi or generic bars at the same size. The difference is typically 0.5 to 1.5 percentage points. Both are LBMA-accredited and contain the same gold.

Market conditions: When gold prices hit record levels, dealer premiums can compress (more sellers entering the market) or expand (supply chain bottlenecks). Volatility itself widens spreads because dealers price in the risk of inventory moving against them during transit.

The most effective way to minimize premiums is to compare dealer pricing before every purchase. The same 1 oz bar can vary by 2 or more percentage points across dealers on the same day. FindBullionPrices.com tracks real-time pricing from trusted dealers on gold bars, making it possible to identify the lowest available premium before committing capital.

Buying at or Near Spot

Several dealers periodically offer 1 oz gold bars at or near spot price as a new-customer promotion. These deals are legitimate loss leaders designed to acquire customers who will make future purchases at standard premiums. The gold at spot price guide tracks which dealers run these promotions and how to qualify. If you have never purchased from a major online dealer, this is the cheapest way to acquire your first ounce of gold.

Authentication and Verification

Every bar from an LBMA-accredited refiner is stamped with the refiner’s mark, the bar’s weight, purity (.9999 fine), and a unique serial number. Most are sold in tamper-evident assay cards that include a certificate matching the serial number on the bar.

PAMP Suisse bars include Veriscan, a proprietary system that maps the microscopic surface texture of each bar and stores it in a database. Buyers can verify authenticity through the PAMP app by scanning the bar. For a step-by-step walkthrough, see how to verify a PAMP Suisse gold bar. Other refiners use holographic features (Argor-Heraeus Kinebar), micro-engraving (Perth Mint), or QR-code-linked certificates.

For investors who want to verify gold at home regardless of brand, there are several accessible methods. The home gold testing guide covers the most practical options, from specific gravity tests to electronic testers.

How to Choose the Right Bar

The right bar depends on your budget, your timeline, and what you are optimizing for.

Lowest cost per ounce: Buy the largest bar you can afford. A 10 oz bar or kilo bar delivers the tightest spread over spot. If those are beyond your budget, a 1 oz bar is the standard unit where premiums become reasonable. Compare live pricing on the gold closest to spot page.

Regular accumulation on a budget: Fractional gold bars in the 5 to 10 gram range let you buy gold consistently without large lump sums. Premiums are higher, but the discipline of regular purchases can offset the cost over time through dollar-cost averaging.

Maximum flexibility: 1 oz bars are the most liquid size. They are universally recognized, easy to sell in any quantity, and accepted by every dealer. If you are unsure what size to start with, 1 oz is the default.

Gifts or small allocations: Fractional gold bars make excellent gifts. A 1 gram or 2.5 gram PAMP Lady Fortuna in an assay card is a polished, self-contained product. Accept the premium as part of the gift’s presentation value.

Regardless of size, the most important variable is the premium you pay at the point of purchase. A 2-point spread between dealers on the same bar is real money on every transaction. Compare gold bar prices across dealers before every buy.