What Are You Not Allowed to Put Into a Self-Directed IRA?

Self-directed IRAs have become increasingly popular among investors looking to diversify beyond traditional assets like mutual funds and publicly traded stocks. With a self-directed IRA, investors can access alternative investments such as:

Real estate
Private equity
Promissory notes
Cryptocurrency
Precious metals

However, despite this flexibility, self-directed IRAs are still governed by strict IRS rules regarding what investments are allowed and how transactions must be conducted.

Violating these rules can cause the entire IRA to become taxable, potentially triggering taxes and early withdrawal penalties.

Watch: Learn what investments a self-directed IRA may invest in

In this guide, we’ll cover:

Investments that are not allowed in a self-directed IRA
Prohibited transactions and disqualified parties
Consequences of violating IRA rules
Key differences between a Self-Directed IRA and a Solo 401(k)

Investments Not Allowed in a Self-Directed IRA

Under Internal Revenue Code Section 408, certain assets are explicitly prohibited from being held inside an IRA.

1. Life Insurance

A self-directed IRA cannot invest in life insurance policies of any kind.

This includes:

Whole life
Universal life
Term life
Variable life

This restriction applies regardless of the policy structure.

Why This Matters

One key advantage of a Solo 401(k) over a self-directed IRA is that qualified plans may invest in life insurance, provided they follow the incidental benefit rules.

This makes the Solo 401(k) structurally more flexible for certain retirement planning strategies.

2. Collectibles

The IRS also prohibits IRAs from investing in most collectibles.

Examples include:

Artwork
Antiques
Rugs
Stamps
Alcoholic beverages
Trading cards (sports cards, Pokémon cards, etc.)
Certain coins

However, some precious metals are allowed, provided they meet IRS purity standards.

Examples of allowed coins include:

American Eagle gold or silver coins
Canadian Maple Leaf coins

3. Diamonds and Gems

Investments in diamonds and gemstones are not permitted within a self-directed IRA.

These assets are considered collectibles under IRS rules and therefore prohibited.

4. S-Corporation Stock

Neither a self-directed IRA nor a Solo 401(k) may own S-corporation stock.

This restriction exists because the S-corporation tax rules limit shareholders to eligible individuals and certain trusts.

Retirement accounts are not considered eligible shareholders.

What are you not allowed to put…

However, a retirement account may:

Invest in C-corporations
Issue a promissory note loan to a business (provided it does not involve disqualified persons)

Prohibited Transactions in a Self-Directed IRA

Beyond prohibited assets, the IRS also prohibits certain transactions between the IRA and disqualified persons.

These rules are designed to prevent investors from personally benefiting from retirement assets before retirement age.

Disqualified Persons

Disqualified persons include:

The IRA owner
The IRA owner’s spouse
Parents and grandparents
Children and grandchildren
Businesses owned by the IRA owner
Fiduciaries or plan administrators

The IRA cannot transact with any of these parties.

Examples of Prohibited Transactions

Some common examples include:

Selling Property You Already Own to Your IRA

For example:

Selling your personal rental property to your IRA
Transferring land you own into the IRA

This is prohibited because you cannot sell or exchange property you personally own with your IRA.

Transferring Property Owned by Family Members

Your IRA cannot purchase property from:

Your spouse
Your parents
Your children
Any other disqualified person

All IRA investments must be purchased from unrelated third parties.

Indirect or “Strawman” Transactions

You also cannot do indirectly what you cannot do directly.

Example:

Selling property to a friend or neighbor and then having them sell it to your IRA.

This is still considered a prohibited transaction.

Consequences of Violating the Rules

The penalties for violating IRA prohibited transaction rules are severe.

If a prohibited transaction occurs:

The entire IRA is deemed distributed as of January 1 of the year the violation occurred.
The full value becomes taxable income.
If under age 59½, an additional 10% early distribution penalty applies.

Example

If an IRA worth $500,000 engages in a prohibited transaction:

The entire $500,000 becomes taxable.
Early withdrawal penalties may apply.
Past tax returns may need to be amended if the violation occurred in prior years.

This is why strict compliance is essential.

Another Limitation: IRA Loans Are Not Allowed

Self-directed IRAs do not allow participant loans.

If you attempt to borrow from your IRA, the IRS will treat it as a distribution, which can trigger taxes and penalties.

Solo 401(k) Advantage: Participant Loans

A Solo 401(k) offers a major advantage over a self-directed IRA.

Participants may borrow from the plan.

Loan Rules

You may borrow:

50% of your account balance
Up to $50,000 maximum

Loan terms typically include:

Repayment over 5 years
Principal and interest payments
No credit check required

The loan payments go back into your own retirement account.

If both spouses participate in the same Solo 401(k), each spouse can borrow up to $50,000, allowing a potential $100,000 total loan capacity. Additional Solo 401(k) Advantages Over Self-Directed IRAs

Compared to self-directed IRAs, Solo 401(k) plans offer several structural advantages:

1. Participant Loans

Borrow up to $50,000 from your plan.

2. Life Insurance Investments

Qualified plans may hold life insurance under IRS incidental benefit rules.

3. No UDFI on Leveraged Real Estate

When a Solo 401(k) uses non-recourse financing to purchase real estate, it generally avoids the Unrelated Debt-Financed Income (UDFI) tax, which often applies to IRAs.