Self-Directed IRA (SDIRA)

A self-directed IRA is an individual retirement arrangement held at a custodian that permits a wider range of investments than a typical brokerage. The critical point, and the one most often gotten wrong, is that it is not a distinct kind of account under the tax code. A self-directed IRA is a traditional or Roth IRA, subject to the same contribution limits, the same deduction and income rules, the same required minimum distributions, and the same taxation on withdrawal. There is no special "self-directed" section of the law. The only real difference is that the custodian will hold assets, real estate, private business interests, promissory notes, precious metals, that a mainstream firm restricts to publicly traded stocks, bonds, and funds.

That freedom is also the source of the account's dangers. Because the assets are private and often involve the owner personally, the tax code's prohibited-transaction rules, which are easy to trip in ordinary life, become a live risk, and the consequence of tripping them is severe.

The prohibited-transaction rules, in Internal Revenue Code Section 4975, bar an IRA from transacting with "disqualified persons." Those include the IRA owner, the owner's spouse, their ancestors and lineal descendants, the spouses of those descendants, and any entity the owner controls. Notably, siblings, and more distant relatives, are generally not disqualified persons, which surprises people. The rules forbid the IRA from, for example, buying property the owner already owns, lending to or borrowing from the owner, or letting the owner personally use or work on IRA-owned real estate. The theory is that an IRA is meant to be an arm's-length investment vehicle, not a way to finance the owner's own affairs with untaxed dollars.

The penalty is what makes this unforgiving. If an IRA engages in a prohibited transaction, the account generally loses its status as an IRA as of the first day of that tax year, and the entire balance is treated as distributed, which can mean a large income-tax bill and, if the owner is under 59 and a half, an early-withdrawal penalty on top. A single mistake can therefore blow up the whole account, not just the offending investment. This is why self-directed real estate deals require scrupulous separation: the IRA pays all the expenses, receives all the income, and the owner does no "sweat equity."

A second, quieter tax trap is unrelated business income tax. An IRA is tax-exempt on ordinary investment income, but not on income from actively operating a business, or on the debt-financed portion of an investment's income (unrelated debt-financed income). A self-directed IRA that owns a rental property with a mortgage, or an interest in an operating business, can owe this tax and have to file Form 990-T, an outcome that defeats part of the point of using a retirement account. The base rules of an IRA itself, contribution limits and distributions, are covered on the individual retirement arrangement page; a self-directed IRA used specifically for physical metals is covered on the precious metals IRA page.

An investor opens an account with a self-directed IRA custodian, funds it by contribution or rollover, and directs the custodian to make a permitted investment. The custodian holds title in the IRA's name and processes the paperwork, but does not evaluate whether the investment is sound. All income from the asset flows back into the IRA, and all expenses are paid from it, keeping the owner at arm's length.

A hypothetical example of the prohibited-transaction risk. Suppose an investor's self-directed IRA owns a rental house, and one summer the owner personally repaints it to save money, and then has a relative move in at below-market rent. Both steps can be prohibited transactions: the owner provided services to the IRA's property, and a disqualified person used it. If the IRS agrees, the IRA can be deemed distributed as of January 1 of that year. On a $200,000 account, that could turn into roughly $200,000 of taxable income at once, plus a penalty if the owner is under 59 and a half, from what looked like harmless cost-saving.

Pros

• Access to investments a mainstream IRA cannot hold: real estate, private companies, notes, and precious metals, all inside a tax-advantaged account.
• The same tax benefits as any traditional or Roth IRA on the growth.
• Useful for investors with genuine expertise in a specific alternative asset.

Cons

• The prohibited-transaction rules are strict, and violating them can disqualify the entire account, triggering a large tax bill at once.
• Unrelated business income tax can apply to leveraged or business-operating investments, an unexpected tax inside a tax shelter.
• Custodians do not vet investments, so fraud and valuation risk fall entirely on the owner, and the field attracts aggressive promoters.
• Higher fees and administrative complexity than a standard brokerage IRA, and illiquid assets can complicate required minimum distributions.