A gold bar purchase and its exit cost: a worked case

What to take away

This fictional case compares equal methods, not equal unit sizes, and discloses every assumption.
The lower purchase premium does not necessarily produce the smaller immediate loss.
A product's fine content, delivered cost, net bid, and round-trip gap belong in one table.
Storage fit and sale size can outweigh a small premium difference.
Records created at purchase reduce later tax, estate, insurance, and resale uncertainty.

Maya wants a modest physical-gold holding that can remain untouched for several years. She is comparing a 20-gram minted bar with a one-troy-ounce sovereign bullion coin. The figures below are fictional and are not forecasts or purchase advice.

Set the decision boundary

Maya writes five requirements:

No borrowing.
One verified dealer with insured, signature-required delivery.
A product that two independent local buyers currently quote.
Secure storage prepared before delivery.
Enough cash retained so the metal is unlikely to require an urgent sale.

The two products contain different amounts of gold, so she will compare both total dollars and cost per fine ounce.

Record the market and product facts

At 10:00 a.m., her chosen reference price is a fictional $2,400 per fine troy ounce.

Fact	20-gram minted bar	One-ounce bullion coin
Gross weight	20.000 g	33.931 g
Fineness	999.9	91.67%
Fine gold	19.998 g	1.0000 troy oz
Fine troy ounces	0.64295	1.0000
Metal reference	$1,543.08	$2,400.00

The alloyed coin weighs more than one troy ounce but contains one troy ounce of fine gold. The bar's fine content is its gross grams multiplied by 0.9999.

Compare delivered acquisition cost

The dealer provides written checkout totals for bank transfer and the same destination.

Cost	20-gram bar	One-ounce coin
Merchandise	$1,600	$2,505
Shipping and insurance	$24	$0
Other required charge	$0	$0
Delivered total	$1,624	$2,505
Premium dollars	$80.92	$105.00
Premium rate	5.24%	4.38%
Delivered cost per fine oz	$2,525.85	$2,505.00

The bar costs less in total because it contains less gold. The coin has the lower acquisition cost per fine ounce in this quote. Neither conclusion could be reached from the product headline alone.

Understand the supply route

Maya checks why retail prices can differ from metal references. The U.S. Mint explains on its authorized bullion purchaser requirements that it sells bullion coins through approved purchasers, bases price on prevailing metal prices plus a product premium, and requires participants to maintain a two-way market. A consumer still buys through the downstream market, where dealer and delivery terms apply.

This source supports the Mint's own distribution program. It does not explain the private bar's route or guarantee Maya's retail dealer.

Add immediate exit quotes

Two local buyers inspect product descriptions and state their current net bids, assuming intact condition and same-day settlement. Maya uses the better documented bid for each, while retaining both quotes.

Exit measure	20-gram bar	One-ounce coin
Gross buyback	$1,512	$2,388
Sale-related cost	$12 insured transport	$0 in-person
Net exit	$1,500	$2,388
Immediate round-trip gap	$124	$117
Gap as share of purchase	7.64%	4.67%

The smaller bar requires less cash, yet has a slightly larger dollar gap and a materially larger percentage gap in this scenario. Another date or market could reverse the ranking.

Include custody and divisibility

The one-ounce coin places more value in one item. The 20-gram bar lowers the amount that must be sold as a single unit, though it is not divisible without destroying its normal product form. Maya is not comparing fractional coins, so neither choice supports very small sales.

The bar arrives in an assay card. One buyer requires the card to remain intact for its quoted bid. The coin arrives in a capsule, and both buyers say capsule scratches will not change their bullion bid if the coin itself remains acceptable. Maya records these conditions rather than assuming they are permanent.

Create the acquisition file

At purchase, Maya saves:

Dealer identity and written terms
Listing, timestamp, invoice, and payment proof
Product specification, weight, fineness, and serial where applicable
Shipping, insurance, receipt, and package photographs
Initial measurements and any professional verification
Storage transfer and insurance confirmation
Both contemporary buyback quotes

For US federal tax preparation, IRS Publication 550 discusses investment income and states that collectibles include metals and coins. Maya's Publication 550 record copy is a starting reference, not a substitute for advice about her facts, basis, holding period, reporting, or state law. She keeps acquisition and sale costs for a qualified tax professional.

Make the decision

Maya chooses the coin because this exact quote has a lower delivered cost per fine ounce, a narrower immediate gap, no package-dependent bid, and two convenient in-person buyers. She accepts its larger cash requirement and unit concentration because they fit her written limit.

The case would support the bar if her maximum cash amount were below the coin's cost, if secure storage favored the smaller value, or if verified bar bids improved. The method does not force one product to win.

Review after purchase

Maya schedules an annual check of inventory evidence, storage access, insurance wording, dealer contact information, and potential sale routes. She does not repeatedly open or handle the product. When market prices change, she updates both the metal reference and real buyback quotes before estimating value.