Direct answer: An intra-family loan is a private loan between family members that the IRS treats as a genuine loan (not a gift) only if it charges interest at or above the Applicable Federal Rate (AFR) published monthly by the IRS. Loans below the AFR trigger imputed interest rules: the IRS taxes the lender on interest they never collected and may reclassify the entire transfer as a taxable gift. A written promissory note, actual payment history, and an interest rate matching the correct AFR tier for the loan term are the minimum requirements to maintain loan treatment.
Intra-Family Loans and IRS Applicable Federal Rate Rules
Key Takeaways
- The IRS requires intra-family loans to charge interest at or above the Applicable Federal Rate (AFR) for the loan's term to be treated as a loan rather than a gift subject to gift tax rules.
- The AFR has three tiers based on loan term: short-term (three years or less), mid-term (three to nine years), and long-term (over nine years). The IRS publishes updated rates monthly.
- Below-AFR loans trigger Section 7872 imputed interest rules: the lender is deemed to have received interest income even if none was paid, and the IRS treats the forgone interest as a gift from lender to borrower.
- An exception applies to loans of $10,000 or less (the de minimis exception), provided the borrower does not use the proceeds to purchase or carry investment assets. Loans between $10,001 and $100,000 have a modified imputed interest rule based on the borrower's net investment income.
- Documentation is critical: a signed promissory note specifying principal, interest rate, repayment schedule, and remedies for default is the minimum evidence that the transfer is a loan, not a gift.
What the Applicable Federal Rate Is and How It Works
The Applicable Federal Rate is the minimum interest rate that the IRS considers adequate for a private loan. It is derived from the average market yield of U.S. Treasury obligations over the prior month. The IRS sets separate AFR tiers for short-term loans (up to three years), mid-term loans (three to nine years), and long-term loans (more than nine years), and publishes updated rates each month in an IRS Revenue Ruling.
The logic behind the AFR requirement is that any forgone interest on a below-market loan is economically equivalent to a gift from the lender to the borrower. The IRS codified this under Internal Revenue Code Section 7872, which treats below-market loans as though the lender had charged the full AFR and then immediately gifted the difference back to the borrower. The result is ordinary income tax on phantom interest income for the lender, and a potential gift tax obligation depending on the amount forgone.
Families use intra-family loans for several purposes: parents lend to adult children for a home purchase, a business startup, or an investment; grandparents lend to grandchildren for education; siblings lend to each other during periods of financial difficulty. In each case, the loan can be structured at below-market rates compared to commercial lenders (bank mortgage rates, for example) while still satisfying the IRS requirement by meeting or exceeding the applicable AFR.
Imputed Interest: What Happens Below the AFR
Section 7872 creates two separate tax events when a loan charges below the applicable AFR. First, the lender is treated as having received interest income equal to the AFR-calculated amount, regardless of whether any interest was actually paid. This phantom income is includable in the lender's gross income and subject to ordinary income tax rates. Second, the same amount is treated as a gift from lender to borrower, counted against the lender's annual gift tax exclusion (currently $18,000 per recipient per year for 2024, indexed annually) and, if it exceeds the exclusion, against the lender's lifetime estate and gift tax exemption.
An interest-free loan is the clearest example. If a parent lends $100,000 interest-free to a child for five years, and the applicable mid-term AFR is 4.5%, the IRS imputes $4,500 of interest income per year to the parent even though no interest was paid. The parent owes income tax on $4,500 annually. If the loan exceeds the annual gift tax exclusion in total value, the forgiven interest accrues against the parent's lifetime exemption.
The de minimis exceptions modify this result in limited cases. Loans of $10,000 or less are generally exempt from imputed interest rules, unless the proceeds are used to purchase or carry income-producing investments. Loans between $10,001 and $100,000 are subject to a softer rule: imputed interest is limited to the borrower's actual net investment income for the year, and if that income is $1,000 or less, no imputed interest is recognized at all.
Documentation Requirements
A legally defensible intra-family loan requires written documentation. Without documentation, the IRS has a strong basis to recharacterize the transfer as a gift at audit, requiring the lender to retroactively file gift tax returns and potentially pay gift tax plus interest and penalties.
At minimum, the documentation should include a promissory note signed by the borrower stating: the principal amount, the interest rate (at or above the applicable AFR), the loan term and repayment schedule (monthly, quarterly, annual, or balloon), what happens if the borrower defaults, and whether the loan is secured by any collateral. The note does not need to be notarized to be legally effective, but some families choose to notarize it to establish authenticity.
Payment history is equally important. If payments are agreed but never made, or if the lender routinely forgives payments, the IRS can treat the entire arrangement as a gift. Payments should be made by check or bank transfer and tracked in both the lender's and borrower's records. Some families use a loan servicing company or escrow service to administer the payments, which creates an automatic paper trail and removes the interpersonal friction of the lender directly demanding payment.
The interest rate should be set at the time the loan is originated using the AFR for that month and loan term. Variable-rate loans can be structured using a rate that adjusts with monthly AFR changes, but fixed-rate loans lock the rate at origination. Either approach is permissible under Section 7872.
Forgiveness and Forgiveness Strategy
Families sometimes structure intra-family loans with an intentional forgiveness strategy: the lender plans to forgive a portion of the principal each year up to the annual gift tax exclusion amount. In theory, this converts a loan into a series of annual gifts, each within the exclusion limit and therefore free of gift tax. In practice, the IRS may scrutinize this arrangement if there was never genuine intent to collect repayment.
The risk is that a planned loan-with-annual-forgiveness may be recharacterized as a disguised gift at origination. If the IRS determines that neither party ever intended for the loan to be repaid, it can treat the entire principal as a taxable gift in the year of origination rather than as a series of annual exclusion gifts. Factors that support genuine loan treatment include: the lender's consistent behavior in making similar loans and collecting repayment, the borrower's demonstrated capacity to repay from their own resources, a realistic repayment schedule relative to the borrower's income, and documented follow-through on payment obligations.
Forgiveness of loan principal is itself a gift in the year of forgiveness, separate from the imputed interest issue. If a parent holds a $200,000 note and forgives $18,000 per year, each forgiveness event is a gift counted against the annual exclusion. The forgiveness should be documented in writing, signed by the lender, and retained alongside the original note.
Common Mistakes and How to Avoid Them
The most common mistake in intra-family lending is treating it as an informal arrangement. Families frequently transfer money between generations with an oral understanding that it is a loan, then fail to document it, charge interest, or track payments. When the lender dies, the estate may have difficulty proving a loan obligation exists (or conversely, the borrower may dispute the loan existed). When the IRS audits, undocumented transfers default to gift treatment.
A second common mistake is using the wrong AFR tier. The applicable tier depends on the loan term at origination. A five-year loan uses the mid-term AFR, not the short-term rate. Using the wrong tier means the effective rate may still be below the applicable AFR, triggering imputed interest rules even though the loan charges interest.
A third mistake is failing to update documentation when terms change. If the borrower misses payments and the parties informally extend the loan term, the new term may fall into a different AFR tier, and the original fixed rate may now be below the applicable rate for the extended term. Any modification to the loan's terms should be documented in writing as a formal amendment to the original note.
Frequently Asked Questions
What is the Applicable Federal Rate for intra-family loans?
The Applicable Federal Rate (AFR) is the minimum interest rate the IRS requires on private loans to avoid imputed interest treatment. The IRS publishes three AFR tiers monthly based on loan term: the short-term AFR applies to loans of three years or less, the mid-term AFR to loans of three to nine years, and the long-term AFR to loans over nine years. Rates are set based on Treasury yield averages for the prior month. For the most current rates, check IRS Revenue Rulings published monthly at irs.gov. An intra-family loan at or above the applicable AFR for its term is treated as a loan. A loan at a rate below the AFR triggers imputed interest rules.
Does an intra-family loan need to be documented in writing?
Yes. A written promissory note signed by the borrower is essential for the IRS to treat the transfer as a loan rather than a gift. The note should state the principal amount, interest rate (at or above the applicable AFR), repayment schedule, and what happens in default. An undocumented transfer, or one where no payments are actually made, is likely to be recharacterized as a gift upon audit. Some families use an escrow company or attorney to hold the note and track payments; others document payments through regular bank transfers. Either approach creates the paper trail needed to support loan treatment.
Is this personalized financial advice?
No. This content is educational and cannot account for a reader's complete tax situation, family structure, or loan terms. Work with qualified tax or legal professionals before structuring an intra-family loan.