Selling your house to your son, daughter, or sibling and carrying the note yourself is called seller financing, and the IRS treats it very differently from an ordinary home sale. You still have to charge interest at or above the Applicable Federal Rate (4.92% for a long-term note signed in August 2026), you still owe capital gains tax on the profit, and you still have to file a new tax form every single year a payment comes in. Skip any of that and the IRS can rewrite your deal for you, turning tax-free principal into taxable interest or a "sale" into a taxable gift.
This is the piece most general real estate guides leave out: seller financing to family isn't a one-time paperwork event. It is a multi-year obligation you have to track, report, and defend, the same way you would any other loan.
How Seller Financing a Home to a Family Member Actually Works
In a seller-financed sale, you (the seller) act as the bank. Instead of your child getting a mortgage from Chase or Rocket, they sign a promissory note directly to you, secured by a deed of trust or mortgage against the property. You transfer title at closing, they pay you principal and interest over time, usually monthly, for a term you both agree to.
Families use this structure for three practical reasons: the buyer may not qualify for a conventional mortgage yet, the seller wants steady interest income instead of a lump sum, or both sides simply want to skip a lender's underwriting process. None of those reasons exempt the deal from IRS scrutiny. Once money changes hands over more than one tax year, you have created what the IRS calls an installment sale, governed by IRS Publication 537 and reported on Form 6252.
Seller financing is not the only way families fund a home purchase together. If the buyer just needs a co-signer on a conventional mortgage rather than a seller-financed note, a family opportunity mortgage may fit better, and if several relatives are buying and living in the property jointly, look at multi-generational home purchase strategies instead.
The AFR Rule: Why You Cannot Just Pick a Friendly Interest Rate
Say "we'll do 2%, it's family" and the IRS has a specific answer for that. Under Internal Revenue Code Sections 483 and 1274, a seller-financed note has to carry interest at least equal to the Applicable Federal Rate, the minimum rate the Treasury publishes every month. For August 2026, per Revenue Ruling 2026-13, the annual-compounding AFR is:
- Short-term (3 years or less): 4.10%
- Mid-term (over 3, up to 9 years): 4.35%
- Long-term (over 9 years): 4.92%
These rates move monthly, so check the current AFR for the actual month you close, not the numbers above once time has passed. Whichever rate applies to your note's term, it locks in at signing and stays fixed for the life of that note, even after the published AFR changes the following month. The same AFR floor applies to ordinary family loans, not just home sales; see what interest rate to charge on a family loan for the full picture beyond real estate.
If you charge less than the AFR, or nothing at all, the IRS does not just let it slide. Under the unstated interest and original issue discount rules, it recharacterizes part of each principal payment as interest income to you, taxed at ordinary rates instead of the capital gains rate you were expecting. You end up paying more tax on money you never actually received as interest.
There is a narrow safe harbor: for most seller-financed home sales, a lower "test rate" (capped at 9%, compounded semiannually) can apply instead of the full AFR, but only up to a stated principal amount that Treasury also adjusts yearly, $7,462,600 for debt instruments arising in 2026. Almost every family home sale falls well under that ceiling, so in practice, the AFR is the number that matters.
The Two-Year Resale Trap That Catches Almost Everyone Off Guard
Here is the rule competing guides tend to skip entirely. Under IRC Section 453(e), if the person you sold to resells the property within two years of your sale, and you are still owed money on the note, the IRS can accelerate your remaining deferred gain into the year of that second sale, whether or not you have actually received the cash yet.
This "related person" rule covers the sales families actually make: spouses, siblings (including half-siblings), ancestors, and lineal descendants. Say you sell your rental house to your daughter on a 10-year note and she sells it 14 months later. You could owe tax on the whole remaining gain that year, even though your daughter's buyer is the one who paid her, not you. Real, documented exceptions exist, including sales after either party's death, involuntary conversions, and cases where you can show tax avoidance was not a principal purpose of either sale, but the burden is on you to establish that. Build a two-year hold into the family's plans up front, or budget for the acceleration if a quick resale is likely.
Selling Below Market Value? You May Be Making a Gift, Too
Plenty of families intentionally price a seller-financed sale under market value to help the buyer out. That is allowed, but the discount itself is treated as a gift, separate from the loan.
Say a home is worth $400,000 and you sell it to your son for $340,000. That $60,000 gap is a gift of equity. For 2026, the annual gift tax exclusion is $19,000 per giver, per recipient, so a married couple selling to one child can give $38,000 combined without touching their lifetime exemption. The remaining $22,000 in this example has to be reported on Form 709, though it is unlikely to trigger actual gift tax given the $15 million lifetime exemption for 2026. Reporting it correctly still matters. An unreported six-figure gift is exactly the kind of thing an IRS audit finds years later, with penalties attached. If your real goal is eventually forgiving part or all of the remaining note rather than collecting every payment, plan that separately; see how to forgive a family loan without a gift tax bill before you promise anything to the buyer.
Filing Form 6252 Every Single Year You Get Paid
An installment sale is not a file-once-and-forget transaction. Per IRS Topic 705 and Publication 537, you file Form 6252 for every tax year in which you receive a payment, not just the year of closing, until the note is paid off. Each payment gets split three ways: a nontaxable return of your basis, taxable capital gain (using a gross profit percentage fixed at the start of the sale), and taxable interest income, reported separately on Schedule B.
If the home was your primary residence, the home sale exclusion still applies to the gain portion, up to $250,000 for single filers or $500,000 for married couples filing jointly, provided you owned and lived in it at least two of the last five years. That exclusion can wipe out most or all of the capital gain on a typical family home sale, which is exactly why sellers often assume the whole transaction is tax-free. The interest you charge is never excluded. It is ordinary taxable income every year you receive it, for as long as the note runs.
A Worked Example: The Hendersons Sell to Their Son
Diane and Mark Henderson sell their $400,000 home to their son Ethan and his wife. Ethan puts $60,000 down and the Hendersons carry a $340,000 note for 20 years, so the long-term AFR applies. At August 2026's 4.92% long-term rate, a 20-year fully amortizing note on $340,000 runs a little over $2,200 a month in principal and interest, front-loaded with more interest in the early years the same way a bank mortgage would be. You can generate the full year-by-year split with the amortization schedule calculator.
Because they sold at the appraised value, there is no gift to report. Because Ethan is buying it as his primary residence and has no plans to resell, the two-year rule never gets triggered. Each year, the Hendersons file Form 6252, report the interest portion on Schedule B, and apply their $500,000 joint exclusion against whatever gain shows up. That is what a seller-financed family sale looks like when it is documented and tracked correctly from day one.
Seller Financing vs. a Straight Family Loan vs. a Bank Mortgage
| Family seller financing | Family cash loan | Bank mortgage | |
|---|---|---|---|
| Who holds title first | Seller, until closing; buyer at closing | N/A, no property changes hands | Bank, until buyer pays off |
| Minimum interest rule | AFR (IRC Sections 483 and 1274) | AFR, same rule | Market rate, no floor |
| Underwriting | None required | None required | Full credit and income check |
| Capital gains reporting | Yes, Form 6252 annually | No, it's a loan not a sale | Yes, seller reports gain at closing |
| Related-party resale risk | Yes, 2-year rule under 453(e) | No | No |
| Best for | Seller who owns the home outright and wants to finance the sale | Helping a relative buy from a third party, or covering another expense | Buyer who can qualify and seller wants a clean, one-time cash exit |
Keeping the Note Audit-Proof: Documentation That Actually Holds Up
The IRS treats undocumented "family deals" with suspicion precisely because so many of them are really disguised gifts. Protect both sides with:
- A signed promissory note stating the price, interest rate, term, and payment schedule. See what a promissory note needs to include.
- A recorded deed of trust or mortgage against the property, so the note is actually secured, not just a verbal understanding.
- A third-party appraisal at the time of sale, so you can prove fair market value if you priced it at a discount.
- A year-by-year payment ledger showing exactly how much interest and principal you received, matching what you report on Form 6252 and Schedule B.
A free loan agreement generator covers the note itself, but for an installment sale specifically, pair it with a real deed and a closing handled by a title company or real estate attorney, not a handshake. Once the note is signed, start tracking the loan so every payment, interest split, and Form 6252 figure is in one place instead of scattered across bank statements.
When to Call a Real Estate Attorney Instead of Doing This Yourself
Seller financing a $150,000 paid-off home to one adult child on a simple 10-year note is well within DIY territory if you use a proper promissory note and deed. Bring in a real estate attorney or CPA when the property still has an existing mortgage (most lenders' due-on-sale clauses complicate this), when more than one child is involved and estate fairness is a concern, when the sale price is meaningfully below market value, or when the buyer's ability to keep paying is genuinely uncertain. The legal and tax cost of getting it wrong, an accelerated gain under the two-year rule or a six-figure unreported gift, is almost always higher than the cost of an hour with a professional up front.
This article is for general information and is not tax or legal advice. Confirm your specific numbers with a CPA or real estate attorney before you close.
