How the AFR works
What is the Applicable Federal Rate?
The AFR is a set of minimum interest rates the IRS publishes monthly. For a loan between family members above $10,000, charging at least the AFR keeps the IRS from treating the loan as a disguised gift. It's the floor, not a required rate — you can charge more.
Which AFR applies to my loan?
It depends on the term: short-term for loans up to 3 years, mid-term for over 3 and up to 9 years, and long-term for over 9 years. Use the term of your note, not the borrower's age or anything else.
What if I charge less than the AFR?
The gap between the AFR and your rate is "forgone interest," treated as a gift to the borrower each year. Usually it's well under the $19,000 annual exclusion, so no filing — but on a large loan it can exceed it. The imputed-interest calculator shows the gift amount.
General information, not tax or legal advice. AFRs change monthly; always confirm the current figure with the IRS before signing a note.