Two things decide whether a gold bar can sit inside an IRA: how pure it is, and who made it. Almost every buyer checks the purity and stops there. The refiner brand stamped on the bar is what determines whether your custodian accepts the delivery, and whether you can sell the bar years later without giving up an extra slice of the spread.
Here is the short version of what custodians and depositories in the United States routinely take.
| Refiner or mint | Bar fineness | Routinely accepted | What to know |
|---|---|---|---|
| PAMP Suisse | .9999 | Yes | Swiss refiner, assay-card packaging, one of the most liquid retail brands |
| Valcambi | .9999 | Yes | Swiss refiner, also produces bars branded for other sellers |
| Argor-Heraeus | .9999 | Yes | Swiss refiner, widely recognised at buyback |
| Metalor | .9999 | Yes | Swiss refiner with US operations |
| Asahi Refining | .9999 | Yes | Acquired Johnson Matthey’s North American precious metals business in 2015 |
| Perth Mint | .9999 | Yes | Government-owned Australian mint |
| Royal Canadian Mint | .9999 | Yes | Government mint, qualifies on both refiner and sovereign grounds |
| Rand Refinery | .9999 | Yes | South African refiner, less common in US retail channels |
| Credit Suisse (legacy bars) | .9999 | Usually | Brand retired after the UBS takeover; existing bars still trade, confirm with your depository |
| Johnson Matthey (legacy bars) | .9995+ | Usually | Refining business sold in 2015; older bars are collectible and can price above melt |
| Generic or unbranded bars | Varies | No | No accredited hallmark means no reliable chain of custody |
The names above are the ones that come up again and again on custodian intake lists. None of them are a substitute for confirming the exact product before you fund. The rest of this article explains why the brand matters, where the rule actually comes from, and how to run the check yourself in about ten minutes.
Purity Is Only Half the Test
The tax code treats collectibles as a prohibited IRA holding, then carves out an exception for bullion. The wording in Section 408(m) of the Internal Revenue Code is worth reading closely, because it does not name a purity number at all. It allows gold bullion “of a fineness equal to or exceeding the minimum fineness that a contract market requires for metals which may be delivered in satisfaction of a regulated futures contract,” provided the metal is in the physical possession of an IRA trustee.
That single sentence does two things. It sets the gold minimum at .995, because that is the deliverable standard on the regulated futures exchange. And it quietly imports the exchange’s other delivery conditions, which are not about purity at all. A futures exchange will not accept just any .995 bar into its warehouse system. It accepts bars carrying the hallmark of a refiner the exchange has approved.
What this means for you: the “accredited refiner” requirement that every gold IRA company mentions is real, but it does not come from an IRS list. There is no IRS-published roster of approved brands. The requirement flows from the futures market the statute points at, and custodians and depositories then apply it as an intake rule. Ask a dealer to show you the IRS list of approved refiners and there is nothing to show, which is exactly why the question gets murky answers online.
What LBMA Good Delivery Actually Certifies
The London Bullion Market Association maintains the Good Delivery List, the accreditation most often cited when a dealer says a bar is IRA-approved. As of August 2026 the current gold list holds 67 refiners. Getting on it is not a formality. An applicant has to produce at least 10 tonnes of refined gold a year, hold a tangible net worth of at least £15 million, and pass assaying tests on sample bars.
Staying on it is the harder part. Listed refiners submit to annual third-party assessment of their sourcing under the LBMA’s Responsible Gold Guidance, plus ongoing proficiency testing and periodic checks that they still meet the production and net worth thresholds. Refiners drop off the list, and when they do their bars move to a separate former list rather than disappearing.
So the accreditation certifies three things at once: that the metal assays as marked, that the refiner is financially substantial enough to stand behind it, and that the gold was not sourced through channels the market considers unacceptable. You can check any brand yourself against the LBMA current list before you buy.
Where Custodians and Depositories Add Their Own Rules
Meeting the statutory test is the floor, not the ceiling. Each party in the chain can be stricter, and several routinely are.
- Custodians maintain their own approved-product lists. A bar that clears the tax code can still be refused because the custodian does not want the administrative burden of an unusual product.
- Depositories control intake. Some will not accept bars whose tamper-evident assay packaging has been opened, because resealing is not something a vault can certify.
- Dealers steer toward what they can source and resell. That is not necessarily against your interest, but it is not neutral advice either.
This is one of the practical reasons the three-party structure of a gold IRA matters. The dealer selling you the bar is not the party that has to accept it into storage, and a mismatch between the two is your problem to unwind, not theirs.
Why an Off-List Bar Costs You at Buyback
Suppose a bar clears every eligibility test but carries an obscure hallmark. It is real gold, it is in the vault, and nothing is wrong. The cost shows up years later when you sell.
A buyer who recognises the brand can price it off the spot market immediately. A buyer who does not has to price in the possibility of assay, or discount for the fact that the next buyer down the chain will hesitate too. That discount comes out of your account, and it stacks on top of the markup you already paid going in. Understanding why your first statement shows less than you paid makes the point concrete: the spread is the real cost of a gold IRA, and an unrecognised brand widens it at exactly the moment you have the least leverage.
Assay cards and serial numbers are what keep the spread narrow. A sealed one-ounce bar with a matching assay card and a serial number the refiner can confirm moves at close to spot. The same weight of metal in a plain bar with no documentation does not.
A Three-Step Brand Check Before You Wire the Money
None of this needs an expert. Run these three steps in order and the problem mostly disappears.
- Get the exact product in writing. Not “one ounce gold bar” but refiner name, weight, fineness and packaging. If the invoice or order confirmation will not name the refiner, that is the answer to your question.
- Check the refiner against the LBMA current list. It takes a minute. If the name is not there, ask which other accreditation the refiner holds and get the answer in writing rather than over the phone.
- Confirm acceptance with the depository, not the dealer. Call the depository your account will use and ask whether they take that specific product. This is the step almost nobody does, and it is the only one that closes the loop.
Two related habits are worth building at the same time. Compare intake rules when you are choosing a custodian, since a restrictive approved-product list is easier to discover before you open the account than after. And treat the product conversation as part of the price conversation, because bar selection and markup are negotiated together. Our guide to negotiating dealer markups covers how those two levers interact.
The Takeaway
Purity gets the attention because it is a number, and numbers are easy to quote. The refiner is what actually determines whether your bar gets into the vault and what it fetches on the way out. Ask for the brand, verify it against the LBMA list, and confirm acceptance with the depository before any money moves. A bar that fails one of those three checks is not a small paperwork problem. It is either a delivery that gets rejected or a position that quietly costs you at sale.
This article is educational and is not tax or investment advice. Confirm eligibility for any specific product with your custodian and depository before you buy.
