A wraparound mortgage is a form of seller financing in which the seller keeps their existing mortgage in place and issues the buyer a new, larger loan that wraps around the unpaid balance of the original. The buyer sends one monthly payment to the seller, who uses part of it to keep paying the original lender and pockets the difference. It lets a buyer purchase without qualifying for a bank loan, but the structure carries real legal and financial risk for both sides, and most of that risk traces back to a single provision in the seller’s original loan documents.
How the Payments Actually Flow
The seller’s original mortgage stays active. Nothing gets paid off at closing except whatever cash the buyer brings as a down payment.
A worked example makes the mechanics clearer. A seller owes $150,000 on a first mortgage at 4% and sells the home for $250,000. The buyer puts $25,000 down and signs a wraparound note for $225,000 at 6%. That $225,000 figure combines the $150,000 the seller still owes the original lender and the $75,000 in equity the seller is financing. Each month the buyer pays the seller based on the $225,000 balance at 6%. The seller forwards enough to cover the $150,000 loan at 4% and keeps the rest.
The seller’s profit comes from two places: the spread between 6% and 4% on the underlying balance, and interest earned on the additional $75,000. Because the original mortgage never gets paid off, the seller stays legally on the hook to the first lender. The buyer holds equitable interest and usually gets a deed, but the original lender’s lien remains senior to the wraparound. If the first mortgage falls behind, the original lender can foreclose no matter how faithfully the buyer has been paying the seller.
The Due-on-Sale Clause
Nearly every standard mortgage contains a due-on-sale clause, a provision that lets the lender demand full repayment if the borrower sells or transfers the property without written consent.1Office of the Law Revision Counsel. 12 U.S. Code 1701j-3 – Preemption of Due-on-Sale Prohibitions The Garn-St. Germain Depository Institutions Act of 1982 gave these clauses federal backing and overrode state laws that had tried to limit them.2Federal Reserve History. Garn-St Germain Depository Institutions Act of 1982
A wraparound mortgage transfers equitable interest to the buyer, which is exactly the type of transfer the clause is written to catch. If the original lender finds out, it can accelerate the loan and demand the entire remaining balance. The seller then either pays off the full underlying mortgage or faces foreclosure. Any down payment and monthly payments the buyer has made are at risk in that foreclosure, and the seller’s credit takes the hit even if the buyer never missed a payment.
Some sellers assume the lender will not notice as long as payments keep arriving on time. Lenders do monitor their portfolios and can spot a transfer through insurance changes, tax records, or title searches. The bet works until it doesn’t.
Federal law does list nine narrow exceptions where lenders cannot enforce a due-on-sale clause on residential property with fewer than five units, but these cover events like a co-owner’s death, transfers to a spouse or child, divorce decrees, and moves into a living trust where occupancy doesn’t change.1Office of the Law Revision Counsel. 12 U.S. Code 1701j-3 – Preemption of Due-on-Sale Prohibitions None of them cover a standard wraparound sale to an unrelated buyer. For a typical arm’s-length deal, due-on-sale risk stays fully in play.
What the Buyer Is Really Signing Up For
The buyer has no direct relationship with the original lender. Payments go to the seller, and the buyer trusts the seller to forward the correct amount each month. If the seller pockets the payment, the first mortgage goes delinquent quietly, and the buyer may not learn about it until foreclosure paperwork arrives. Because the first lien is senior, the wraparound lien gets wiped out when that foreclosure completes.
Several contractual protections cut this risk without eliminating it:
- Third-party loan servicing. An independent escrow company collects the buyer’s payment, pays the original lender directly, and forwards the remainder to the seller. It takes the seller out of the payment chain and creates a paper trail. Monthly cost typically runs $25 to $75.
- A payment verification clause requiring the seller to provide monthly proof, such as a lender statement, that the underlying mortgage was paid.
- A right to cure that lets the buyer pay the original lender directly if the seller falls behind, then deduct those amounts from future payments owed to the seller.
- Insurance clauses naming both the seller as wraparound lienholder and the original lender as mortgagee, so both are notified if coverage lapses.
Even with all of this, the buyer is betting on the seller managing the underlying debt responsibly for a loan term that may run 15 to 30 years. That counterparty risk simply doesn’t exist with a conventional bank mortgage.
Rules the Seller Has to Follow
Dodd-Frank restricts who can originate residential mortgage loans, and a seller offering wraparound financing can be pulled into loan originator territory. Two federal exemptions let most sellers avoid licensing.
The Three-Property Exemption
A seller who finances three or fewer properties in any 12-month period avoids loan originator classification if every loan is fully amortizing with no balloon payment, the seller makes a good-faith determination that the buyer can reasonably repay, and the interest rate is fixed or adjustable only after five or more years with reasonable annual and lifetime caps.3eCFR. 12 CFR 1026.36 – Prohibited Acts or Practices and Certain Requirements for Credit Secured by a Dwelling The seller must own the property and cannot have built it as a contractor.
The One-Property Exemption
Individual sellers, estates, and trusts financing one property sale per year get slightly more lenient terms. The loan doesn’t have to be fully amortizing, but it cannot have negative amortization. The same interest rate restrictions apply.3eCFR. 12 CFR 1026.36 – Prohibited Acts or Practices and Certain Requirements for Credit Secured by a Dwelling
Both exemptions prohibit mandatory arbitration clauses. A seller who exceeds these caps, or uses a balloon under the three-property exemption, needs a mortgage originator license and full regulatory compliance. An investor selling several homes a year with wraparound financing has to count carefully and confirm every loan is fully amortizing.
Tax Treatment
For the seller, the IRS treats a wraparound as an installment sale because payments arrive over multiple tax years. Gain gets reported on Form 6252, which allocates each payment between taxable profit and return of basis.4Internal Revenue Service. About Form 6252, Installment Sale Income Interest is reported separately as ordinary income, not capital gains. The IRS also requires the loan to charge at least the applicable federal rate; charging less triggers imputed interest that reclassifies part of each principal payment as ordinary income.5Internal Revenue Service. Publication 537, Installment Sales Wraparound rates almost always exceed the AFR in practice because the seller’s profit depends on charging more than the underlying rate.
When the assumed mortgage exceeds the seller’s adjusted basis, the excess counts as a payment received in the year of sale, which can produce a larger upfront tax bill.5Internal Revenue Service. Publication 537, Installment Sales
For the buyer, wraparound interest is deductible like any home mortgage interest, but only if the loan qualifies as secured debt. The IRS is explicit: a wraparound mortgage is not secured debt unless it is recorded or otherwise perfected under state law. Skip the recording step and the deduction disappears. Because the seller isn’t a financial institution, no Form 1098 shows up at year-end; the buyer has to report the seller’s name, address, and taxpayer identification number on Schedule A, and the seller must reciprocate. A failure to exchange these numbers can trigger a $50 penalty per failure.6Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
Drafting, Closing, and Recording
The seller starts by requesting a payoff statement from the current lender. Federal law requires the lender or servicer to provide an accurate payoff balance within seven business days of a written request.7Office of the Law Revision Counsel. 15 U.S. Code 1639g – Requests for Payoff Amounts of Home Loan That figure, showing principal, accrued interest, and any escrow shortages, becomes the baseline for the wraparound note.
The core document is typically called an all-inclusive trust deed (AITD) or wrap mortgage. It states the total wraparound loan amount, interest rate, payment schedule, late fee terms, and how the wraparound relates to the underlying first mortgage. A legal description from the current deed identifies the collateral. Two provisions deserve extra care in drafting: how the seller will prove the underlying mortgage is being paid each month, and the mechanics of the buyer’s right to pay the original lender directly if the seller defaults, including how the buyer recovers those payments. Both sides benefit from having a real estate attorney review the documents before signing.
At closing, both parties sign the wraparound deed of trust before a notary, and the document gets filed at the county recorder’s office. Recording fees run roughly $50 to $200 depending on document length and county. Recording is not a formality. Without it, the buyer loses the interest deduction, and the wraparound lien is not properly perfected against later claims.6Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction
The buyer should also obtain a title insurance policy that reflects both the wraparound lien and the existing first mortgage. Title insurance protects against undisclosed liens, ownership disputes, and recording errors. Combined with a third-party servicer handling the monthly payment flow, these steps give both sides real visibility into a loan that may otherwise run in the dark for decades.