Blog · 14 October 2026

AFR Rates October 2026 and Below-Market Family Loans: What US CPA Firms Should Tell Clients

By Keshav Bansal, CA

AFR rates October 2026 matter every time a client lends money to a child, parent or other family member at little or no interest. Rev. Rul. 2026-19, published in Internal Revenue Bulletin 2026-42 (October 13, 2026), sets the applicable federal rates for October 2026. Under IRC §7872, charging less than the AFR on a below-market gift loan can recharacterize the forgone interest as a gift plus taxable interest income to the lender. For US CPA firms, October is a good moment to refresh organizers, promissory-note checklists and gift-tax questions before year-end family advances.

What Rev. Rul. 2026-19 sets for October 2026

Per Rev. Rul. 2026-19 (also in IRB 2026-42), Table 1 lists the short-term, mid-term and long-term applicable federal rates under §1274(d) for October 2026. The annual-compounding AFRs are:

• Short-term AFR: 4.25%
• Mid-term AFR: 4.61%
• Long-term AFR: 5.22%

The ruling also publishes semiannual, quarterly and monthly compounding columns, plus 110%/120%/130% (and for mid-term, 150%/175%) multiples used under other Code sections. Table 5 sets the §7520 rate for October 2026 at 5.60% for valuing annuities, life interests, term interests and remainder or reversionary interests. The IRB synopsis expressly lists §7872 among the sections that use these rates.

Use the rate that matches the loan’s term and compounding period. Under the §1274(d) framework that drives the AFR tables, short-term covers instruments not over three years, mid-term covers more than three years but not over nine, and long-term covers more than nine years. Demand loans generally look to the short-term AFR under the §7872 rules.

How §7872 treats below-market family loans

IRC §7872 applies to gift loans and certain other below-market loans. In broad terms:

• A below-market loan is one where interest is payable at a rate less than the applicable federal rate (for a demand loan), or where the amount loaned exceeds the present value of all payments due under the loan using the AFR (for a term loan).
• A gift loan is a below-market loan where the forgoing of interest is in the nature of a gift—typical of interest-free or low-interest advances between family members.
• Forgone interest on a gift loan is generally treated as transferred from the lender to the borrower as a gift, and then retransferred from the borrower to the lender as interest. The lender may have interest income; the gift may use annual exclusion or lifetime exemption capacity.

Two statutory exceptions matter on most family-loan organizers:

• $10,000 de minimis. For a gift loan directly between individuals, §7872 does not apply on any day the aggregate outstanding loans between those individuals do not exceed $10,000. That exception does not apply if the loan is directly attributable to purchasing or carrying income-producing assets.
• $100,000 limitation. For gift loans directly between individuals, when aggregate loans between the borrower and lender do not exceed $100,000, the amount treated as retransferred to the lender for income-tax purposes is limited to the borrower’s net investment income for the year. If the borrower’s net investment income is $1,000 or less, it is treated as zero. The limitation does not apply when aggregate loans exceed $100,000, or when a principal purpose of the interest arrangement is tax avoidance.

Gift-tax consequences of the forgone interest are a separate analysis from the income-tax limitation. Do not assume a loan under $100,000 is “free” of gift reporting questions.

What US CPA firms should tell clients

• Document the loan. A written note stating principal, interest rate at or above the correct AFR, payment schedule, and maturity (or demand feature) is the baseline. Verbal “I’ll pay you back when I can” advances are where §7872 surprises appear.
• Pick the right AFR column. Match term length to short-, mid- or long-term, and use the compounding period that fits the note. For an October 2026 term loan, start with Rev. Rul. 2026-19 Table 1.
• Track aggregate balances. The $10,000 and $100,000 tests look at aggregate outstanding loans between the same lender and borrower, not each note in isolation.
• Ask about use of proceeds. Loans tied to income-producing assets lose the $10,000 gift-loan de minimis.
• Separate gift tax from income tax. Even when the §7872(d) income-tax limitation caps imputed interest income, forgone interest can still be a gift.
• Watch §7520 work. Clients funding GRATs, charitable remainder trusts or other split-interest gifts in October 2026 use the 5.60% Table 5 rate, not the Table 1 loan AFRs.

Year-end is also when extension filers and collection conversations collide with family cash needs. Keep the October 15 extension deadline checklist and your IRS collection alternatives notes handy when a client asks whether an interest-free advance is “simpler” than other options.

A short firm checklist for October–December

• Add family-loan and intrafamily-note questions to the organizer (parties, amount, rate, term, demand vs term, use of proceeds, other loans outstanding).
• Compare every new or modified note’s rate to the AFR for the month the loan is made (or the month of a significant modification).
• Flag notes below the AFR for §7872 modeling before anyone files a gift-tax return or assumes “no income.”
• Coordinate installment-sale and tax-payment timing questions—such as the section 1062 farmland election—separately from gift-loan AFR tests; different Code sections, different rates.

Where this fits for Tax Brew readers

Family loans show up in high-net-worth and closely held-business files all season. The math is usually straightforward once the AFR, term and exceptions are clear; the risk is an undocumented advance that never made it onto the organizer.

If gift-loan workpapers, basis schedules or related-party reconciliations are stretching your team, outsourced tax prep and bookkeeping support for US CPA firms can take the data gathering and draft schedules while your signing professionals keep the judgment calls. Email info@taxbrewglobal.com.

Check current IRS guidance: this article summarizes Rev. Rul. 2026-19 (IRB 2026-42, October 13, 2026; PDF at irs.gov/pub/irs-drop/rr-26-19.pdf) and IRC §7872 as described in the sources named above. Applicable federal rates change monthly. Confirm the current AFR, §7520 rate and Code text before advising clients. This is general information, not tax or legal advice. Sources as of 14 October 2026.