A subject-to real estate deal is a purchase in which the buyer takes title to the property while the seller’s existing mortgage stays in place and in the seller’s name. The buyer owns the house, makes the monthly payments, and controls what happens with the property, but the loan is never formally transferred or reissued. That split between who owns the property and who owes the debt is the whole point of the structure, and it’s also where every risk in the deal comes from.
How the Structure Actually Works
The mechanics center on separating the deed from the promissory note. At closing, the seller signs a deed transferring ownership to the buyer, and that deed is recorded with the county recorder’s office. From that moment, the buyer is the legal owner. They can rent it out, renovate, or resell. The seller’s name, meanwhile, stays on the mortgage. The lender’s records still show the seller as the borrower, and the lender’s lien on the property remains as collateral for the unpaid balance.
That produces a three-way relationship. The buyer controls the asset. The seller remains personally obligated on the debt. The lender holds a security interest in the property itself. Because the buyer never formally assumes the loan through the lender, no credit check or lender approval is required. The arrangement lasts until the buyer refinances into their own loan, sells the property, or pays off the remaining balance.
Why Buyers and Sellers Agree to This
The draw for buyers is inheriting the seller’s existing interest rate. If the seller locked in 3.5% years ago and current rates sit above 6%, the buyer captures a significant monthly payment advantage without qualifying for a new loan. Closing costs also drop. There’s no lender origination fee, no bank-ordered appraisal, and no underwriting delay. Buyers who can’t qualify for conventional financing because of credit issues or self-employment income gaps often find subject-to their clearest path to ownership.
Sellers usually agree because they have a problem. The most common scenario is a homeowner behind on payments who needs someone to take over the mortgage before foreclosure lands on their credit report. A subject-to buyer can close in days rather than the 30 to 45 days a financed buyer needs. Other sellers use it to unload a property they can no longer afford after a job loss, divorce, or relocation.
The trade-off for the seller is real. The mortgage stays on their credit report and counts against their debt-to-income ratio, which can make qualifying for a new home loan difficult until the buyer eventually refinances or pays off the balance.
The Due-on-Sale Clause
Nearly every residential mortgage contains a due-on-sale clause, and federal law backs it up. Under the Garn-St. Germain Depository Institutions Act, codified at 12 U.S.C. ยง 1701j-3, lenders have the right to demand the full remaining loan balance if any interest in the property is transferred without their written consent. The statute defines the clause as a provision letting the lender declare all sums due and payable when the property “is sold or transferred without the lender’s prior written consent.”1Office of the Law Revision Counsel. 12 USC 1701j-3 Preemption of Due-on-Sale Prohibitions Federal law preempts any state law that would limit enforcement, so no state can simply ban the clause.
Recording a new deed is the classic trigger. The same statute, however, carves out situations where a lender cannot accelerate the loan on a residential property with fewer than five units, including:
- A transfer to a relative after the borrower dies
- A transfer to a spouse or child who becomes an owner
- A transfer resulting from a divorce decree or separation agreement
- A transfer into a living trust where the borrower remains a beneficiary and keeps occupancy rights
- A junior lien that doesn’t involve transferring occupancy rights
- A lease of three years or less with no purchase option
Most subject-to deals between unrelated investors and distressed sellers don’t fall into any of these categories.1Office of the Law Revision Counsel. 12 USC 1701j-3 Preemption of Due-on-Sale Prohibitions The lender has the contractual right to call the loan. Whether they exercise it is a separate question.
In practice, lenders rarely accelerate a performing loan. The mortgage is generating interest income, payments arrive on time, and the property is maintained. Calling the loan means the lender has to deal with potential default, foreclosure costs, and a property they don’t want to own. Rarely is not never, though. Lenders do run title checks periodically, and a change of ownership can surface through insurance reviews or property tax records. Treating the clause as a manageable risk rather than a theoretical one is the realistic approach.
What Happens If the Lender Calls the Loan
If the lender discovers the transfer and enforces the clause, they issue a demand letter requiring the full remaining balance. The buyer usually has a narrow window to respond. The realistic options are:
- Refinance into a new loan in the buyer’s name and pay off the existing mortgage. This works when the buyer has enough equity and credit to qualify, though rising rates may make the new payment significantly higher.
- Sell the property. If equity has built up or the market has appreciated, selling and paying off the balance eliminates the problem and is often the fastest resolution.
- Negotiate with the lender. Some lenders will agree to a formal loan assumption or modification rather than push the loan into default, and a clean payment history strengthens that conversation.
- Deed the property back to the seller. This reverses the deal and avoids foreclosure on the seller’s credit, but if the property is worth less than the loan balance, neither party escapes the shortfall cleanly.
The worst outcome is doing nothing. If the buyer ignores the demand and the balance goes unpaid, the lender moves toward foreclosure, which damages the seller’s credit because they remain the borrower of record.
Risks the Seller Keeps After Closing
The seller’s biggest vulnerability is that their credit is tied to someone else’s payment habits. Every late payment by the buyer appears on the seller’s credit report. A single missed payment can drop a score by 100 points or more, and a foreclosure stays on the report for seven years. The seller has no practical way to force on-time payment short of a breach-of-contract claim, which takes months and costs money.
Beyond credit, the seller remains personally liable on the promissory note. If the buyer defaults and the property is foreclosed and sold at auction for less than the balance owed, the lender can pursue the seller for the shortfall through a deficiency judgment in most states. Signing over the deed doesn’t release the promise to repay the debt.
Debt-to-income is the third pressure point. Mortgage underwriters evaluating the seller for a future home loan will count the subject-to mortgage as an active debt. Even if the buyer has paid perfectly, the seller’s name is on the note, and most underwriters treat it as the seller’s obligation until the loan is refinanced out of their name.
A well-drafted agreement pushes back against some of this. Requiring the buyer to pay through a third-party loan servicer, maintain hazard insurance, and refinance within a set number of years gives the seller documentation and a timeline. A performance deed held in escrow can give the seller a faster path to reclaim the property if the buyer stops paying. None of these are foolproof, but they shift the leverage.
Documents and Requirements Before Closing
The buyer needs a clear picture of the existing loan before anything gets signed. That starts with the seller’s most recent mortgage statement showing the payoff balance, interest rate, monthly payment, and the status of the escrow account for property taxes and insurance. If the loan has an adjustable rate, the adjustment schedule and rate caps matter.
A title search comes next, ordered through a title company to surface junior liens, unpaid tax assessments, mechanic’s liens, or other claims. The existing mortgage will appear on the title report as a known encumbrance, which is expected because keeping it in place is the point of the deal. An owner’s title insurance policy protects against title defects the search missed.
The paperwork specific to subject-to goes beyond a standard purchase agreement:
- A subject-to disclosure signed by the seller, confirming they understand the loan stays in their name, payments will be made by the buyer, and the lender could accelerate the loan at any time.
- A subject-to addendum to the purchase agreement identifying the specific loan, including the loan number, lender name, approximate balance, interest rate, and monthly payment.
- An authorization to release information signed by the seller, letting the buyer or a servicing company communicate with the lender about the loan’s status.
Every document needs the property’s legal description as it appears on the existing deed or county tax records. Verifying every loan detail against the lender’s records before closing prevents surprises when a discrepancy between the mortgage statement and the actual payoff turns up later.
Closing, Servicing, and Insurance
Once documents are signed and notarized, the buyer records the new deed with the county recorder. Recording puts third parties on notice of the ownership change. Some jurisdictions impose a transfer tax at recording, calculated as a percentage of the sale price or the consideration paid, with rates running from zero in states that don’t tax transfers to roughly 0.5% to 1% or more elsewhere. In a subject-to deal, the “consideration” question can get complicated because the buyer isn’t paying the full price in cash, so how local law defines the taxable amount matters. Checking with the county recorder or a local attorney before closing avoids a surprise bill.
After recording, the most important step is setting up reliable payment flow. Many buyers hire a third-party loan servicing company to collect the monthly payment and forward it to the seller’s lender. This produces a documented payment trail that protects both sides. The servicer’s records prove on-time payments if a dispute arises, and the arrangement gives the seller confidence that the lender is actually being paid.
Insurance requires immediate attention. A standard homeowner’s policy is a personal contract between the insurer and the named policyholder. When ownership changes, the old policy does not automatically transfer. The buyer must obtain a new policy in their own name and list the seller’s lender as the mortgagee so the lender’s interest stays protected. If the buyer leaves the seller’s old policy in place and a claim later arises, the insurer may deny it because the named insured no longer owns the property. This is one of the fastest ways for a subject-to deal to fall apart.
Property Tax Reassessment
Recording a new deed can trigger a property tax reassessment depending on where the property is located. Some jurisdictions reassess to current market value on every transfer. Others follow fixed reassessment schedules regardless of ownership changes. The variation is wide.
A property currently assessed at $150,000 that the county reassesses to $280,000 after transfer could see its annual tax bill nearly double. The buyer should check with the county assessor before closing to understand whether the deed transfer triggers reassessment and what the likely new value will be. Factoring the potential increase into cash flow projections is easy to overlook and expensive to ignore.
Tax Consequences for Each Side
The IRS treats a subject-to sale like any other property disposition when calculating the seller’s capital gain. The seller’s “amount realized” includes not just the cash received at closing but also any mortgage debt the buyer takes on. As IRS Publication 544 puts it, the amount realized includes “any of your liabilities that were assumed by the buyer and any liabilities to which the property you transferred is subject.”2Internal Revenue Service. Publication 544 (2025), Sales and Other Dispositions of Assets A seller with a $180,000 mortgage balance who receives $20,000 in cash has an amount realized of $200,000 minus selling expenses.
The seller may exclude some or all of the gain under the primary residence exclusion. For 2025, and expected to remain the same for 2026, the exclusion is $250,000 for single filers and $500,000 for married couples filing jointly, provided the seller owned and used the home as a primary residence for at least two of the last five years.3Internal Revenue Service. Publication 523 (2025), Selling Your Home
For the buyer, tax treatment depends on how the property is used. A buyer holding it as a rental can deduct the mortgage interest they actually pay, depreciate the building over 27.5 years, and deduct operating expenses such as repairs, insurance, and property management. The buyer’s cost basis is typically the purchase price in the contract, not the remaining mortgage balance.
If the Seller Dies or Files Bankruptcy
Two scenarios subject-to buyers rarely plan for can create serious complications. If the original seller dies while the mortgage is still in their name, federal law works in the buyer’s favor: the Garn-St. Germain Act prohibits lenders from enforcing the due-on-sale clause when a transfer occurs because of the borrower’s death.1Office of the Law Revision Counsel. 12 USC 1701j-3 Preemption of Due-on-Sale Prohibitions The practical picture is messier. The servicer may not know about the subject-to arrangement and could treat the estate or heirs as successors, disrupting payment processing until the buyer works it out with the servicer and the seller’s estate.
Seller bankruptcy is more dangerous. If the seller files Chapter 7, a bankruptcy trustee takes control of the seller’s estate and can scrutinize recent asset transfers. A subject-to deal completed within two years before the filing could be challenged as a fraudulent transfer if the trustee determines the seller didn’t receive fair value. Even when the transfer isn’t reversed, the bankruptcy can disrupt payments. Servicers may freeze online payment access or route payments through the bankruptcy proceeding. A buyer in this situation needs a bankruptcy attorney involved immediately, because the outcome depends heavily on how title was held and how the court characterizes the transaction.
Both scenarios reinforce the broader point of the whole arrangement: the buyer’s ownership depends on a loan that someone else controls. Contingency plans built into the original agreement, including the right to refinance and a clear notification process if the seller’s finances change, reduce the exposure without eliminating it.