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October 23, 2026

Can a Solo 401(k) Get a Mortgage on Investment Property

Diana Hoff, CISP
Time
2 minutes

You found the rental property. Your Solo 401(k) has enough for a down payment. Your lender says, “We just need your personal guarantee.”

That last sentence is where an ordinary real estate purchase can become a retirement plan problem.‍

Yes, a self-directed Solo 401(k) can borrow to purchase investment property when its plan documents permitit and the transaction follows applicable rules. But the borrower, ownership, and loan terms must be structured for the retirement plan. You cannot simply take out a conventional mortgage in your own name and use it to finance property owned by your plan.

Before you sign a purchase agreement, it helps to understand how these pieces fit together.‍

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The Plan Is Buying the Property‍

A Solo 401(k) is a retirement plan for an eligible self-employed individual or business owner. When a self-directed plan purchases real estate, the property is a plan investment.

That means the transaction must reflect the plan’s ownership:

  • The purchase contract and deed must identify the proper plan trust or authorized plan-owned entity.
  • The loan must name the appropriate plan borrower.
  • The down payment, closing costs, and ongoing expenses must come from plan funds.
  • Rental income and sale proceeds must return to the plan.

For a direct purchase, title commonly identifies the trustee acting for the plan trust. Exact vesting depends on the plan’s legal name and structure. Your administrator, lender, attorney, and title company should coordinate that wording before closing.‍

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You may sign as the plan’s trustee if authorized. That is different from signing as an individual borrower or guarantor.

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Why a Personal Guarantee Can Create Problems‍

With an ordinary investment property mortgage, a lender may expect you to promise repayment personally. If the property cannot cover the debt, the lender can pursue you under that guarantee.

Retirement plans operate under different rules.

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Federal prohibited transaction rules generally restrict lending money or extending credit between a plan and a disqualified person unless an exemption applies. A participant who serves as the plan’s fiduciary is a disqualified person. Personally guaranteeing the plan’s loan can constitute an extension of credit to the plan.

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The problem can arise when you give the guarantee, even if the lender never collects from you.

Other arrangements that require careful review include pledging your home or personal brokerage account, co-signing the plan’s debt, or agreeing to cover a shortfall personally. A guarantee from your spouse or another disqualified person does not solve the issue.‍

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“I am only helping my retirement plan qualify” does not remove the prohibited transaction concern.

 

What Is a Non-Recourse Loan?

A non-recourse loan generally limits the lender’s recovery to specified collateral rather than allowing collection from you personally.

For a straightforward plan-owned real estate purchase, that collateral is generally the investment property securing the loan. If the borrower defaults, the lender can enforce its rights against that property under the loan documents and applicable law.

Non-recourse financing is commonly used to avoid a participant’s personal guarantee. However, a loan’s label does not settle every issue. Guarantees, indemnities, additional collateral, and exceptions to non-recourse treatment must also be reviewed.

A lender may ask you to sign an exception or “carve-out” guarantee for certain events. That language deserves review by an attorney familiar with retirement plan prohibited transactions before you sign.‍

Non-recourse does not mean risk-free. The plan can lose its investment through foreclosure.

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Why You Cannot Use Your Conventional Personal Mortgage

A conventional personal mortgage makes you the borrower and typically relies on your personal repayment obligation.

A plan-owned property requires a structure that keeps ownership, borrowing, and payments aligned with the plan. Taking out a personal mortgage and having the plan make your payments can create prohibited transaction issues. Buying personally and later selling the property to your own plan generally creates another prohibited transaction concern.

The lender needs to understand from the beginning that this is a retirement plan transaction.

Ask whether it lends to qualified retirement plan trusts, whether it requires any personal guarantee, and what down payment and reserve requirements apply. Rates, loan terms, and underwriting requirements vary by lender.‍

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What Might a Financed Purchase Look Like?

Imagine a plan purchasing a rental property for $300,000:

Purchase component Illustrative amount
Plan-funded down payment $120,000
Non-recourse loan to the plan $180,000
Purchase price $300,000

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These figures illustrate the structure, not a required down payment or financing offer. The plan would also need funds for closing costs and ongoing reserves.

The property belongs to the plan. Rent goes into the plan, and the plan pays the mortgage, property taxes, insurance, and other property expenses.

A vacancy or unexpected repair bill does not make it appropriate to pay the plan’s bills from your personal checking account. Any additional funding must follow applicable plan rules, including contribution limits and eligibility requirements.‍

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Is There a Tax Difference Between a Solo 401(k) and an IRA?

There can be.

Debt-financed real estate in an IRA can generate unrelated debt-financed income, or UDFI, which may be subject to unrelated business income tax, or UBIT.

A qualified Solo 401(k) trust may qualify for the real property debt exception under Internal Revenue Code Section 514(c)(9). When its conditions are met, qualifying acquisition or improvement debt generally does not produce UDFI under those rules.‍

This exception is conditional. Purchase terms, financing arrangements, related parties, and partnership structures can affect eligibility. It also does not exempt every type of business income from UBIT.

Have your CPA or tax attorney evaluate the specific transaction before relying on the exception.‍

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Financing Does Not Change the Personal Use Rules

Borrowing does not turn plan-owned property into a personal asset. Using it as your vacation home, renting it to a disqualified person, or using it for your own business can create prohibited transaction issues.

The investment must serve the retirement plan, and transactions involving you, your business, or covered family members need careful review.‍

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Before You Commit to the Purchase

Start with these questions:

  • Does my plan permit direct real estate ownership and borrowing?
  • Will the lender finance a retirement plan purchase without my personal guarantee?
  • Do the contract, deed, and loan documents identify the proper owner and borrower?
  • Does the plan have enough cash for closing, debt payments, vacancies, and repairs?
  • Has my attorney reviewed the loan terms for prohibited transaction concerns?
  • Has my CPA evaluated the tax treatment, including Section 514(c)(9)?

A Solo 401(k) can finance investment property, but the structure matters from the first conversation with the lender through the final closing documents.‍

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Ready to Take Control of Your Retirement Strategy?

At Mountain West IRA, we help clients understand the administration and paperwork involved in self-directed retirement accounts, including Solo 401(k) plans holding real estate.

Have questions about getting started or the account process? Contact our Accounts Department:

Mountain West IRA is a Self-Directed IRA and Solo 401(k) Administrator and neutral third-party record-keeper. We process transactions and maintain records; you direct your investments. We do not recommend or endorse investments or provide investment, tax, or legal advice. This article is for educational purposes only. Consult your CPA, financial advisor, and attorney about your specific circumstances.‍

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