An assumption of debt is an arrangement in which a new party takes over responsibility for paying an existing loan or obligation, stepping into the shoes of the original borrower. The catch that trips up almost everyone: unless the creditor signs a written release, the original borrower stays legally liable even after someone else promises to pay. Sellers, divorcing spouses, and heirs regularly discover this the hard way, months or years after they thought the debt was gone.
Assumption Versus the Arrangements It Gets Confused With
People use “assumption” loosely, but the law treats several similar-sounding arrangements very differently. The label on the paperwork controls what happens to you if the new party stops paying.
In a true assumption, the new party agrees to become directly liable to the creditor for the debt. The creditor can pursue the new party for missed payments. Whether the original borrower is also released depends on what the creditor puts in writing.
A novation is the cleanest form of transfer. All three parties agree that the new debtor replaces the original debtor entirely, and the original obligation is extinguished. The original borrower has no further liability, and the creditor cannot later change its mind and come after them if the new debtor defaults. Novation must be express; courts will not imply it from ambiguous language or conduct.
A “subject to” purchase is something else again. The buyer takes the deed and agrees to make payments, but never assumes personal liability for the loan. The original borrower remains the only person the lender can sue. If the buyer stops paying, the lender forecloses on the property and pursues the original borrower for any deficiency. Common in creative real estate deals, and dangerous for the seller.
An indemnity agreement is a private promise between the original borrower and the new party. The new party agrees to reimburse the original borrower if the creditor comes after them. The creditor is not part of this deal and has no obligation to honor it. The original borrower remains fully liable to the lender. Indemnity is a backstop, not a transfer.
What the Creditor Has to Agree To
The single most important requirement in any debt assumption is the creditor’s explicit, written consent. A lender evaluated its original borrower’s creditworthiness before extending the loan, and swapping in a new debtor changes the lender’s risk. No creditor is obligated to accept a substitute borrower, which is why the creditor holds the leverage in every assumption negotiation.
The assumption agreement itself must clearly identify the debt being transferred, including the original contract date, outstanding balance, and interest rate. It must contain an unambiguous statement that the new party accepts full liability. Most critically, it must spell out whether the creditor is granting a full release of the original borrower (making it a novation) or merely accepting the new party as an additional obligor while keeping the original borrower on the hook.
Promises to pay someone else’s debt generally have to be in writing to be enforceable. This requirement comes from the Statute of Frauds, which applies in every state, though specific rules vary. An oral promise to assume another person’s debt is typically unenforceable. The narrow exception is when the person making the promise is doing so primarily for their own benefit rather than as a favor to the original borrower.
For secured debts like mortgages, the paperwork is heavier. The lender must approve the new borrower’s credit, any existing defaults have to be cured before the assumption closes, and the transfer documents must be recorded. The agreement should also address escrow accounts, insurance, and who pays the administrative and legal fees the lender charges for processing.
What Happens to the Original Borrower
Everything about the original borrower’s position after an assumption depends on the type of consent the creditor gave.
If the creditor agreed to a novation, the original borrower is completely discharged. The creditor accepted the new debtor as the sole obligor and cannot pursue the original borrower for any reason, including a default years down the road. This is the outcome worth fighting for.
If the creditor consented to an assumption without releasing the original borrower, the original borrower becomes something like a guarantor. The new borrower makes the payments and bears primary responsibility, but if they default, the creditor can come after the original borrower for the full amount. This is where most people get burned. They leave the closing table believing the debt belongs to someone else, then receive a collection notice months or years later.
An original borrower stuck in that position does have legal recourse. If forced to pay because the new borrower defaulted, they acquire subrogation rights, stepping into the creditor’s position to pursue the new borrower for the amount paid. They also retain indemnity rights under the assumption agreement, giving them a direct contractual claim for reimbursement. In practice, though, a new borrower who defaulted on the lender rarely has the resources to pay the original borrower either. The right exists; collecting on it is a different problem.
Credit reporting follows the same logic. After a full assumption with release, the account should show as closed and transferred. After a simple assumption where the original borrower keeps liability, the account stays on their credit report, and late payments by the new borrower can still damage it.
When the Lender Can’t Block a Transfer
Most residential mortgages include a due-on-sale clause, which gives the lender the right to demand immediate full repayment if the property is sold or transferred without written consent. Federal law carves out specific situations where lenders cannot enforce that clause on residential properties with fewer than five units. Under the Garn-St. Germain Depository Institutions Act, a lender may not accelerate the loan when the transfer falls into any of these categories:
- A transfer to a relative resulting from the borrower’s death, or an automatic transfer on the death of a joint tenant or tenant by the entirety.
- A transfer where a spouse becomes the owner under a divorce decree, legal separation agreement, or property settlement.
- A transfer where the borrower’s spouse or children become an owner of the property.
- A transfer into a living trust where the borrower remains a beneficiary and occupancy rights don’t change.
- The creation of a junior lien or encumbrance that doesn’t transfer occupancy rights.
- A lease of three years or less with no purchase option.
The protections stop the lender from calling the loan, but they don’t release the original borrower from the note. A surviving spouse who inherits the home and keeps paying is protected from acceleration, but unless they complete a formal assumption or refinance, the deceased borrower’s estate may technically remain obligated.1Office of the Law Revision Counsel. 12 U.S. Code 1701j-3 – Preemption of Due-on-Sale Prohibitions
Assuming an FHA or VA Loan
Government-backed mortgages are the most commonly assumed residential loans because their program rules explicitly allow it. Most conventional mortgages, by contrast, let the lender simply refuse.
FHA Loans
All FHA-insured mortgages are assumable. For loans originated after December 1, 1986, the new borrower has to pass a creditworthiness review, meeting FHA credit and income standards much like a new applicant would. The lender is involved in the process and must approve the new borrower. FHA caps the processing fee a lender can charge.
The appeal is locking in the original borrower’s interest rate. When rates have risen since the loan was written, the existing rate can represent tens of thousands of dollars in savings. The new borrower still has to cover the gap between the sale price and the remaining loan balance with cash or a second loan.
VA Loans
VA-guaranteed loans are also assumable, and the new borrower does not have to be a veteran. The VA requires the loan to be current, the new borrower to contractually agree to purchase the property and assume full liability, and the new borrower to meet VA credit and underwriting standards.2Department of Veterans Affairs. VA Circular 26-23-10
The VA charges a funding fee of 0.5% of the remaining loan balance on assumptions. Veterans with a service-connected disability are exempt.3Department of Veterans Affairs. Funding Fee Schedule for VA Guaranteed Loans
The trap for sellers is VA entitlement. If the new borrower is not a veteran, or is a veteran who does not substitute their own entitlement, the selling veteran’s entitlement stays tied up in the loan until it is paid in full. The seller cannot use their VA benefit to buy another home in the meantime. Only when an eligible veteran buyer substitutes their own entitlement does the seller get theirs back.2Department of Veterans Affairs. VA Circular 26-23-10
To get a release from personal liability, the selling veteran must submit VA Form 26-6381 with the required documentation, and the new borrower must assume liability to both the loan holder and the government. Without that process, the selling veteran remains personally liable even after the new borrower takes over payments.4Department of Veterans Affairs. Application for Assumption Approval and Release from Personal Liability to the Government on a Home Loan – VA Form 26-6381
Tax Consequences You Won’t See at Closing
Debt assumption creates tax consequences that surprise sellers because no cash changes hands, yet the IRS treats the transaction as though it did.
The rule comes from the Supreme Court’s decision in Crane v. Commissioner: when a buyer takes property subject to or assumes the seller’s debt, that debt is included in the seller’s “amount realized” on the sale.5Justia. Crane v Commissioner, 331 U.S. 1 (1947) The tax code defines “amount realized” as all money received plus the fair market value of any other property received.6Office of the Law Revision Counsel. 26 USC 1001 – Determination of Amount of and Recognition of Gain or Loss Courts have read debt relief into that definition because being freed from an obligation is economically the same as receiving cash.
An example. You sell a commercial building with an adjusted basis of $500,000, receive $200,000 in cash, and the buyer assumes your $600,000 mortgage. Your amount realized is $800,000, and your taxable gain is $300,000, even though you only pocketed $200,000. The $600,000 in debt relief is income you never touch but still owe tax on.
The Supreme Court extended this in Commissioner v. Tufts, holding that the full amount of nonrecourse debt is included in the amount realized even when the debt exceeds the property’s fair market value.7Justia. Commissioner v Tufts, 461 U.S. 300 (1983) A seller can’t dodge the tax hit by arguing the property was worth less than the mortgage balance.
For the buyer, the assumed debt is included in the property’s cost basis.8Office of the Law Revision Counsel. 26 USC 1012 – Basis of Property; Cost Using the same example, the buyer’s basis in the building would be $800,000. That higher basis produces larger depreciation deductions on business property and a smaller taxable gain when the buyer eventually sells. Gains on business property are generally reported on IRS Form 4797, while gains on capital assets flow through Schedule D.9Internal Revenue Service. Instructions for Form 4797
How to Protect Yourself
If you are the original borrower, push for a novation. A simple assumption that leaves you as a backstop guarantor is the worst outcome for you and the best for everyone else at the table. If the creditor refuses to release you entirely, negotiate for notice provisions that require the lender to alert you before the loan goes seriously delinquent. Finding out early about a default gives you options that vanish once the account is in collections.
If you are the new borrower, confirm in writing exactly what you are assuming. Verify the outstanding balance, interest rate, payment schedule, and whether any defaults or late fees exist on the account. Curing someone else’s missed payments as a condition of assumption is common and should be reflected in the purchase price.
Both parties should keep copies of everything: the assumption agreement, the creditor’s consent letter, any novation or release, and the original loan documents. Those records may sit unused for years. When a dispute finally surfaces, the party with the paperwork wins and the party without it pays.