What Is Imputed Interest and How Is It Taxed?

Imputed interest is the interest the IRS treats as having been paid on a loan when the lender charged less than a federal minimum rate, even though no such payment actually changed hands. The rule exists to stop people from disguising taxable gifts, wages, or dividends as interest-free or low-interest loans. When it applies, the lender reports interest income they never collected, and the borrower is treated as having received a separate transfer whose tax character depends on the relationship between the two parties.

How the Rule Works

The framework comes from Section 7872 of the Internal Revenue Code, which covers any loan carrying a below-market interest rate. The IRS recharacterizes such a loan as two simultaneous transactions. First, the lender is deemed to transfer the “missing” interest to the borrower. Then the borrower is deemed to hand that same amount back to the lender as interest.¹

No cash moves. The lender still owes tax on the deemed interest income, and the character of the first transfer depends on who the parties are. A parent lending to a child creates a gift. An employer lending to an employee creates compensation. A corporation lending to a shareholder can create a dividend.

Which Loans Are Covered

Section 7872 reaches several categories of below-market loans, grouped by the relationship between lender and borrower:

Gift loans between family members or friends, where forgone interest is treated as a gift.²
Compensation-related loans from an employer to an employee, or from a client to an independent contractor, where forgone interest is treated as additional wages.
Corporation-shareholder loans, where forgone interest is treated as a corporate distribution and may be taxable as a dividend.
Tax-avoidance loans, meaning any below-market loan where avoiding federal tax is one of the main purposes of the interest arrangement.
Below-market loans made in connection with a qualified continuing care contract.
Other loans where regulations say the interest arrangement has a significant effect on either party’s federal tax liability.

The common thread is a relationship without arm’s-length bargaining, where the parties have a reason to set the rate artificially low.¹

The Applicable Federal Rate

The benchmark for whether a loan is below-market is the Applicable Federal Rate, or AFR. If the loan’s stated rate falls short of the AFR for its term length, the shortfall is the imputed interest. The IRS publishes updated AFRs each month by revenue ruling, and the rates move with market conditions.³

AFRs come in three tiers:

Short-term: loans of three years or less
Mid-term: loans of more than three years but no more than nine
Long-term: loans of more than nine years

For March 2026, using annual compounding, the rates were 3.59% short-term, 3.93% mid-term, and 4.72% long-term. Because the rates change every month, you need the revenue ruling for the month the loan was made or is being evaluated.³

Demand Loans and Term Loans Are Timed Differently

How and when imputed interest is calculated depends on the loan’s structure.

For demand loans (payable whenever the lender asks) and gift loans, the IRS figures forgone interest for each calendar year and treats that amount as transferred between the parties on December 31. Because the AFR changes monthly, the imputed interest on a demand loan can shift from year to year.¹

For term loans, the calculation is front-loaded. On the day the loan is made, the borrower is treated as receiving a lump sum equal to the difference between the amount loaned and the present value of the required payments, discounted at the AFR. After that, the loan carries original issue discount, and the lender recognizes interest income over the life of the loan under the OID rules.¹

Tax Consequences on Each Side

The lender reports the imputed interest as taxable income on their annual return, even though nothing was collected. For the borrower, the other leg of the transaction carries its own tax character: a gift loan can trigger gift tax, a compensation loan produces taxable wages, and a corporation-shareholder loan can create a taxable dividend.

Whether the borrower can deduct the deemed interest payment depends on how the loan proceeds are used. Funds used for a business or qualifying investment may support a deduction, just as with a conventional loan. Personal-use proceeds get no deduction. When the loan funds an investment, the investment interest expense deduction is capped at the borrower’s net investment income for the year and reported on Form 4952.¹

Exceptions That Keep Small Loans Out

Not every below-market loan triggers the rules. Section 7872 has two thresholds that matter most for family and closely held arrangements.

The $10,000 De Minimis Exception

For gift loans between individuals, imputed interest rules do not apply on any day the total outstanding balance between the two people is $10,000 or less. That exception drops away if the borrower uses the proceeds to buy or carry income-producing assets such as stocks, bonds, or rental property. A separate $10,000 de minimis exception covers compensation-related and corporation-shareholder loans, but it does not apply if tax avoidance is one of the main purposes of the arrangement.¹

The $100,000 Limit for Gift Loans

For gift loans between individuals with an outstanding balance of $100,000 or less, imputed interest is capped at the borrower’s actual net investment income for the year. If that net investment income is $1,000 or less, imputed interest is treated as zero. So a parent can lend a child up to $100,000 at no interest and owe nothing on imputed interest, provided the child’s net investment income stays at or below $1,000.¹

Both thresholds are fixed in the statute and are not adjusted for inflation. Keep records of loan balances and the borrower’s investment income in case the IRS asks.

How Imputed Interest Interacts With Gift Tax

Forgone interest on a gift loan is treated as a gift from lender to borrower and counts toward the annual gift tax exclusion. For 2026, that exclusion is $19,000 per recipient.⁴

In most family situations, imputed interest alone stays well below the exclusion. But it stacks with any other gifts to the same person in the same year. Give a child $15,000 in cash while carrying a large interest-free loan that produces $5,000 in imputed interest, and total gifts for the year reach $20,000. The $1,000 over the exclusion has to be reported on Form 709 and eats into your lifetime gift and estate tax exemption.²

Seller-Financed Property Sales

Imputed interest also reaches sales of property where the seller finances the buyer, such as an installment sale of a home or business. Two other Code sections govern these deals.

Section 1274 applies to most seller-financed property sales where any payment is due more than six months after the sale. If the note from the buyer lacks adequate stated interest (at least the AFR), the IRS reclassifies part of the stated sale price as interest, reducing the sale price and raising the seller’s interest income.⁵

Section 483 covers a narrower slice: sales where some payments are due more than a year after the sale and the contract lacks adequate stated interest. It does not apply when Section 1274 already governs, so the two do not overlap, and it does not reach transactions where the total sale price cannot exceed $3,000. One special rule: on land sales between family members, the discount rate for calculating unstated interest under Section 483 is capped at 6% compounded semiannually, so long as outstanding seller financing between the parties stays at or below $500,000.⁶

What Happens If You Don’t Report It

Missing imputed interest is treated like any other unreported income. Underpay because you left it off, and the failure-to-pay penalty runs at 0.5% of the unpaid tax per month or partial month, up to a maximum of 25%. Interest accrues on both the unpaid tax and the penalties until the balance is cleared.⁷

Because imputed interest is income you never see in cash, it is easy to overlook. A written loan agreement setting out the rate, term, and repayment schedule, even between family, makes calculating and reporting it far simpler each year.

1
Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates
2
Internal Revenue Service. Gift Tax
3
Internal Revenue Service. Applicable Federal Rates
4
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
5
Office of the Law Revision Counsel. 26 USC 1274 – Determination of Issue Price in the Case of Certain Debt Instruments Issued for Property
6
Office of the Law Revision Counsel. 26 USC 483 – Interest on Certain Deferred Payments
7
Internal Revenue Service. Failure to Pay Penalty