What Investors Need to Know Before Making a Private Loan with Retirement Funds

Over the years, I have seen more and more Self-Directed IRA investors turn to promissory notes as a way to generate predictable income and step outside the traditional Wall Street model. And it makes sense. A promissory note allows your IRA to act as the lender. The interest flows back into the retirement account, either tax-deferred or potentially tax-free, depending on the structure. When it is done correctly, this strategy can produce steady returns while preserving the powerful tax advantages that make retirement accounts so valuable.

But lending retirement funds is not as simple as writing a check.

When your IRA is making the loan, you have to follow very specific documentation requirements, avoid prohibited transactions, and structure everything in compliance with IRS rules. Understanding how promissory notes work and using a clear checklist before funding any loan can help you avoid mistakes that could jeopardize your retirement strategy.

What Is a Promissory Note?

At its core, a promissory note is a legally binding agreement where a borrower promises to repay a lender a set amount of money, usually with interest, over a defined period of time.

Inside a Self-Directed IRA, the retirement account is the lender. That means every payment, both principal and interest, must flow directly back into the IRA. Not to you personally.

Promissory notes can be structured in different ways. Some are unsecured and rely entirely on the borrower’s ability to repay. Others are secured by collateral such as real estate, vehicles, business assets, or company shares. That flexibility is what makes private lending attractive to many Self-Directed IRA investors. It opens the door to opportunities that traditional brokerage platforms simply do not offer.

Interest rates must comply with federal and state law, including applicable federal rates and state usury limits. Because these are private agreements rather than publicly traded securities, it is critical to carefully review the loan terms and fully understand the risks before moving forward.

Taxation of a Promissory Note and Why a Self-Directed IRA Can Be So Powerful

One of the biggest factors investors often overlook when evaluating a promissory note is taxation. Unlike investments that generate capital gains, interest income is generally treated as ordinary income. That matters because ordinary income is usually taxed at higher rates than long-term capital gains.

If you hold a promissory note in a personal account, every interest payment you receive during the year may be subject to current income tax. That can significantly reduce your net return.

For example, if you earn 10 percent annual interest on a private loan using personal funds, that income may be taxed each year at your marginal ordinary income tax rate. Depending on your bracket, a meaningful portion of that interest can disappear to federal and state taxes before you even have the opportunity to reinvest it.

Now compare that to using a Self-Directed IRA.

When a Traditional Self-Directed IRA is the lender, interest payments flow back into the IRA without being taxed annually. Instead, the income compounds on a tax-deferred basis until you take distributions in retirement. That means the full amount of the interest stays invested and continues to grow, which can significantly enhance long-term performance.

The potential benefit is even greater with a Roth Self-Directed IRA. In a Roth structure, qualified distributions are generally tax-free. If IRS requirements are satisfied, the interest earned from the promissory note, along with any reinvested earnings, may ultimately be withdrawn without income tax. What would normally be heavily taxed ordinary income can become tax-free retirement income.

Another advantage is reinvestment. In a taxable account, you often need to set aside money each year to cover taxes on interest income. Inside an IRA, the entire payment can be reinvested into additional loans, real estate, or other alternative assets. Compounding becomes far more efficient.

It is also important to understand that most promissory note investments held inside an IRA do not generate Unrelated Business Taxable Income, or UBTI. Interest income is generally considered passive investment income. As long as the loan is structured properly and does not involve prohibited transactions or certain business activities, the IRA can receive interest payments without triggering taxation at the account level.

For many investors, this tax treatment is the primary reason promissory notes have become so popular within Self-Directed IRAs. You are taking income that would otherwise be taxed at ordinary rates and converting it into tax-deferred or potentially tax-free growth.

Why Investors Use Self-Directed IRAs for Promissory Notes

Tax efficiency is a major driver. Interest income earned personally is typically taxed each year as ordinary income. When that same investment is made through an IRA, interest payments flow back into the retirement account without immediate taxation.

That allows the income to compound over time, which can meaningfully accelerate long-term retirement growth.

Many investors also appreciate the diversification aspect. Promissory notes can generate steady income streams tied to private lending arrangements rather than public market volatility. For investors who want income that is not directly tied to stock market swings, this strategy can be appealing.

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Investigating the Borrower: The Most Important Step

If there is one area where investors cannot afford to cut corners, it is due diligence on the borrower.

Even the most carefully drafted promissory note carries risk if the borrower lacks the financial capacity to repay the loan. Before funding any investment, the IRA lender should thoroughly evaluate the borrower’s financial position.

That typically includes reviewing credit history, tax returns, net worth statements, and income documentation.

A loan is only as strong as the borrower’s ability to make payments. If there is uncertainty, investors often require collateral or additional security agreements to mitigate risk.

Understanding IRS Prohibited Transaction Rules

Lending with a Self-Directed IRA requires strict compliance with the prohibited transaction rules under Internal Revenue Code Sections 408 and 4975. These rules are designed to prevent IRA owners from personally benefiting from their retirement investments.

For example, your IRA cannot lend money to you, your spouse, your parents, your children, or any entity you control. Loans to unrelated third parties, such as independent borrowers or business associates, are generally permitted if structured properly.

Violating these rules can result in the disqualification of the IRA. That is not a minor penalty. It can trigger immediate taxation of the entire account. This is why every loan should be carefully reviewed before funds are released.

Promissory Note Checklist for a Self-Directed IRA

A structured checklist helps ensure that all documentation and compliance steps are completed before the IRA sends funds.

Depending on whether the loan is secured or unsecured, you should expect investment authorization forms, a properly executed promissory note, security agreements if applicable, and documentation confirming the borrower’s legal status.

One of the most important technical details is titling. The lender listed on the promissory note must be the IRA custodian for the benefit of the IRA owner, not you personally. For example, the lender may be titled “IRA Financial Trust Company FBO [Investor Name] IRA.” This ensures that all payments flow directly back into the retirement account.

If the loan is secured by real estate, you will likely need a mortgage or deed of trust. Business loans may require corporate documents, operating agreements, or pledge agreements. The documentation should match the structure of the deal.

Secured vs. Unsecured Notes: Understanding the Difference

A secured promissory note gives the lender collateral that can be claimed if the borrower defaults. Real estate backed notes are common because they provide tangible security tied to property value.

Unsecured notes rely entirely on the borrower’s promise to repay. While they may offer higher interest rates, they also carry greater risk because recovery options are limited if the borrower fails to perform.

Experienced Self-Directed IRA investors weigh factors such as collateral quality, loan-to-value ratios, and overall borrower strength before committing retirement funds.

Common Mistakes to Avoid

  • Listing yourself personally instead of the IRA as lender
  • Failing to properly document collateral
  • Lending to a disqualified person
  • Accepting payments outside of the IRA

Attention to detail matters. Proper documentation and professional guidance can go a long way toward reducing risk.

Conclusion

Promissory notes can be a powerful strategy for Self-Directed IRA investors who want steady income and diversification beyond traditional markets. When structured correctly, they allow you to combine private lending with the tax advantages of a retirement account.

The key is discipline. Conduct thorough due diligence. Follow a clear documentation checklist. Ensure proper titling. Stay compliant with IRS rules.

As alternative investments continue to gain traction, having a structured process in place is not optional. It is essential. When you respect the rules and focus on fundamentals, promissory notes can play a meaningful role in a well-designed retirement strategy.

Adam Bergman - Founder

About the Author

Adam Bergman is a tax attorney and the founder of IRA Financial, one of the largest Self-Directed IRA platforms in the United States. He has helped more than 27,000 clients take control of their retirement savings, overseeing over $5 billion in retirement assets. Adam is also the author of nine books focused on helping investors understand and confidently manage their retirement strategies.