What is a prohibited transaction?
The tax code forbids your IRA from dealing with you, your close family, or entities you control, the 'disqualified persons.' The IRA must operate at arm's length: it can't buy from you, sell to you, lend to you, or let you use its assets.
The logic is simple: an IRA is a tax shelter for retirement, not a piggy bank you can dip into early through side doors.
Why do metals IRAs attract prohibited-transaction risk?
Because metal is physical and touchable. Taking IRA metal home, paying yourself 'storage fees,' or buying coins from your own collection into the IRA are all self-dealing, and all things promoters have suggested people do.
The consequence is not proportional: a prohibited transaction can disqualify the entire IRA, making the full balance taxable as if distributed, with penalties on top if you're under the applicable age.
How do prohibited transactions show up in practice?
Every compliant metals arrangement exists to keep you at arm's length: the custodian executes, the dealer sells at market price, the depository stores. Any structure that puts IRA assets in your hands before a distribution is asking the question the IRS answers harshly.