What Gold Purity Level Is Required for an IRA and Where Does That Rule Come From?

The purity requirement for gold in an IRA is not a regulatory policy set by the IRS or a custodian guideline — it is written into the Internal Revenue Code itself. IRC Section 408(m)(3)(B) states that gold bullion held in an IRA must meet a fineness standard equal to or exceeding that required of a gold bar or coin that is delivered in satisfaction of a regulated futures contract. The regulated futures standard on U.S. exchanges (COMEX, NYMEX) for deliverable gold bars is 99.5% (0.9950) fineness.

This cross-reference to futures contract delivery standards was a deliberate legislative choice. Congress wanted IRA-eligible gold to be the same investment-grade metal traded on regulated exchanges — not collector items, not numismatic coins, not jewelry-grade gold. By tying eligibility to the futures market delivery standard, Congress ensured that only refined, hallmarked, commercially traded gold could enter retirement accounts.

The same logic applies to the other metals. Silver must meet the futures delivery standard of 99.9% fineness. Platinum and palladium must meet 99.95% fineness. These standards correspond to what is deliverable on the NYMEX or LME in settlement of a metals futures contract — again, the commercial benchmark, not the purity of a coin struck primarily for collectors.

The American Gold Eagle presents an apparent contradiction. It is 22-karat gold — 91.67% pure gold, 3% silver, and 5.33% copper — well below the 99.5% minimum. Yet it is explicitly listed in IRC Section 408(m)(3)(A)(i) as a gold coin permitted in IRAs. How?

Congress created this exception deliberately when it passed the Taxpayer Relief Act of 1997. The U.S. Mint had been producing Gold Eagles since 1986, and they were (and remain) the most widely held U.S. gold bullion coin. Excluding them from IRAs would have undermined the U.S. Mint's flagship gold program. So Congress wrote the American Gold Eagle into the statute by name, as an exception to the fineness requirement that applies to everything else.

The American Gold Eagle exception is exact and narrow. It covers the coins struck by the U.S. Mint in denominations of $50 (1 troy oz), $25 (½ troy oz), $10 (¼ troy oz), and $5 (1/10 troy oz). It does not extend to:

• The South African Krugerrand — also 22-karat, but not named in the statute
• The British Gold Sovereign — also 22-karat, not named
• Any other 22-karat coin from any mint, domestic or foreign
• American Gold Eagle proof versions marketed at a numismatic premium (these are collectibles, not investment coins)

The American Gold Buffalo, introduced in 2006, is 99.99% pure gold and qualifies under the general fineness standard — not the Eagle exception. Buffalo coins do not require any statutory exception because they simply meet the 0.9950 threshold.

For gold bars and rounds (as opposed to coins), the purity requirement of 99.5% applies without exception, and there is an additional requirement: the bar or round must be produced by a manufacturer, refiner, or assayer that is accredited by one of the recognized exchange or standards bodies. These include:

• NYMEX (New York Mercantile Exchange)
• COMEX (Commodity Exchange, Inc.)
• NYSE/Liffe
• LME (London Metal Exchange)
• LBMA (London Bullion Market Association)
• LPPM (London Platinum and Palladium Market)
• TOCOM (Tokyo Commodity Exchange)
• ISO 9000 or equivalent quality standard

In practice, bars from PAMP Suisse, Valcambi, Metalor, the Royal Canadian Mint, the Perth Mint, and Credit Suisse all meet these criteria. A 1-ounce PAMP Suisse Fortuna bar (99.99% fine, hallmarked with assay certificate) is IRA-eligible. A generic "gold bar" from a local coin shop with no recognized mint or refiner hallmark is not, even if the gold content is 99.9%.

The custodian and dealer are jointly responsible for confirming eligibility at the time of purchase. A reputable Gold IRA company will not allow the purchase of ineligible metal inside your IRA — but the investor should independently verify that any bar or round being purchased carries the hallmarks of an accredited producer.