To assume a mortgage, you take over the seller’s existing home loan at its current rate, balance, and payoff schedule instead of originating a new loan. The process works only with certain loan types, requires full lender approval of you as the new borrower, and almost always leaves a gap between the loan balance and the home’s price that you have to cover with cash or a second loan. When the seller’s rate is well below today’s market, the savings can be substantial, but the path to closing runs through the servicer’s underwriting desk, not a quick handoff between buyer and seller.
Confirm the Loan Is Assumable
Start with the loan type. Government-backed mortgages — FHA, VA, and USDA Rural Housing — contain contract language permitting assumption, subject to lender approval of the new borrower. The lender cannot refuse simply because current rates are higher than the rate on the existing note.
FHA loans originated on or after December 1, 1986 require full lender review of the assuming borrower’s credit before the assumption can go through. VA and USDA loans follow a similar approval-based process.
Conventional mortgages are a different story. They almost always include a due-on-sale clause that lets the lender demand full repayment the moment the property changes hands, and the Garn-St Germain Depository Institutions Act of 1982 gives lenders federal authority to enforce those clauses.1Office of the Law Revision Counsel. 12 USC 1701j-3 Preemption of Due-on-Sale Prohibitions A conventional loan can be assumed only if the lender voluntarily waives the clause, which rarely happens when market rates sit above the loan’s rate.
Ask the seller for the loan type and the servicer’s name before you go any further. If the answer is “conventional” and you are not a close family member inheriting or receiving the property, assumption is probably off the table.
Qualify With the Servicer
Assumption is not a lighter version of a mortgage application. The servicer runs the same underwriting it would run for any new borrower, weighing credit, debt-to-income ratio, and employment stability.
Credit score minimums depend on the program. FHA’s floor is a 580 FICO for maximum financing, though individual lenders often apply higher overlays. The VA sets no official minimum, but most VA lenders look for at least 620. USDA lenders generally land in the same range. A thinner credit file can still work if you bring compensating factors like substantial reserves or very low existing debt.
Debt-to-income guidelines also vary. FHA uses 43% as its benchmark, with automated underwriting sometimes approving higher. The VA has no hard cap but applies extra scrutiny above 41%. USDA’s automated system generally approves up to about 41% on the back end, with manual waivers available to 44% for strong files. Fannie Mae allows up to 50% through automated underwriting on conventional loans.2Fannie Mae. B3-6-02 Debt-to-Income Ratios
Expect to show two years of consistent employment, usually in the same field. The servicer verifies income with recent pay stubs, W-2s, and federal tax returns.3Fannie Mae. B3-3.1-02 Standards for Employment Documentation
Plan for the Equity Gap
This is where most assumption deals get stuck. The equity gap is the difference between what the home is worth (or what you and the seller agreed on) and the balance still owed on the mortgage. If the house is priced at $450,000 and $300,000 remains on the loan, you need to deliver $150,000 to the seller at closing. The longer the seller has owned the home and the more it has appreciated, the larger the gap.
Cash is the simplest answer and the one that disqualifies most buyers. A second mortgage or home equity loan is the usual alternative. On a VA assumption, the VA permits a junior lien to cover the equity gap or closing costs, provided the second stays subordinate to the VA first lien and you do not receive cash back from the proceeds.4Veterans Benefits Administration. VA Circular 26-24-17 Any second-lien payment counts in your DTI, which can push a borderline file over the limit.
Some sellers agree to carry the gap themselves, holding a private note from the buyer at negotiated terms. That keeps the deal alive when outside lenders will not participate, but it leaves the seller depending on you to make two separate payments.
Gather Documents and Request the Assumption Package
Before you contact the servicer, pull together the records a lender always wants to see:
- Two years of W-2s and federal tax returns, plus the most recent 30 days of pay stubs.
- At least 60 consecutive days of bank statements showing liquid funds for the equity payment and closing costs.
- Government-issued ID, the property address, and the existing loan account number.
Then call the servicer and ask for the assumption package. That department is sometimes housed inside loss mitigation, which can slow things down just getting the packet mailed or emailed. The package includes the application, a credit report authorization, escrow disclosures, and program-specific forms.
Line up homeowners insurance in your name before closing. Most servicers require an insurance binder from your insurer naming the lender as loss payee, along with proof the premium is paid.
Make the numbers on your application match your supporting documents exactly. Mismatched deposits, inconsistent employment dates, or unexplained transfers trigger follow-up requests that add weeks. Incomplete paperwork is the most common reason assumptions stall.
Fees and Timeline
Servicers charge an assumption fee for their administrative and underwriting work. HUD’s Single Family Housing Policy Handbook caps the FHA fee at $1,800, raised from $900 effective August 2024. VA assumptions carry a VA funding fee of 0.5% of the loan balance, paid by the assuming buyer unless exempt — on a $300,000 balance, that is $1,500.5Veterans Affairs. VA Funding Fee and Loan Closing Costs USDA assumption fees vary by servicer.
Standard closing costs still apply: title search, recording fees for the new deed, prorated property taxes, and any local transfer taxes. These vary by jurisdiction.
Plan on 60 to 90 days from the date the servicer receives a complete application. Underwriting will almost certainly come back with questions, often about large deposits or employment history. Respond fast. That single habit does more than anything else to keep the file moving.
Close and Get the Seller Released
Once underwriting approves, the lender drafts a formal assumption agreement. At closing, you sign the agreement — which legally binds you to the original promissory note — and the seller signs a deed transferring the property. The deed is recorded with the county recorder, and the servicer updates its records to show you as the primary borrower.
Here is the step sellers routinely miss: the assumption does not automatically remove the seller from the loan. Without a formal release of liability, the seller stays secondarily liable, meaning the lender can still pursue them if you later stop paying, and the loan continues to appear on the seller’s credit. The complete substitution of one borrower for another is called a novation, and it only happens when the lender issues the release.
For FHA assumptions, the servicer uses HUD Form 92210.1, “Approval of Purchaser and Release of Seller,” once the new borrower has been fully underwritten and has signed on to the loan.6U.S. Department of Housing and Urban Development. Are FHA-Insured Mortgages Assumable If you are the seller, do not close without this document in hand or a firm written commitment from the servicer that it will be issued.
If the Seller Is a Veteran
A VA loan assumption interacts with the selling veteran’s entitlement, the guarantee that backs the loan. The entitlement stays tied to that loan until the loan is paid off or another eligible veteran substitutes their own entitlement in writing.
When another eligible veteran assumes the loan and substitutes entitlement, the selling veteran’s entitlement is restored. The assuming veteran files VA Form 26-8106, “Statement of Veteran Assuming GI Loan (Substitution of Entitlement),” along with their Certificate of Eligibility.7Veterans Affairs. About VA Form 26-8106
A non-veteran can also assume a VA loan. The VA requires only that the assumer be creditworthy, contractually obligated to buy the property, and willing to take full liability for the debt.8Veterans Benefits Administration. VA Circular 26-23-10 Because a non-veteran cannot substitute entitlement, the selling veteran’s entitlement stays encumbered until the loan is paid in full, which may leave them without enough remaining entitlement to buy another home with a VA-backed loan.
Tax Treatment After You Assume
A mortgage you assume generally counts as acquisition indebtedness, debt taken on to acquire a home that secures the loan, so the interest is deductible on your federal return within the standard limits. Interest is deductible on up to $750,000 of acquisition debt ($375,000 if married filing separately) for loans originated after December 15, 2017. If you assume an older loan originated before that date, the previous $1,000,000 limit may still apply. To claim the deduction, your name needs to be on the loan obligation after closing, since the IRS requires that the taxpayer be legally liable for the debt.
For the seller’s side, the IRS treats the balance you assume as part of the sale price, which affects their capital gains calculation; the standard home-sale exclusion of up to $250,000 ($500,000 for joint filers) can still apply if they meet the ownership and use tests.9Internal Revenue Service. Publication 523 – Selling Your Home
Why “Subject To” Is Not the Same Thing
Some buyers and sellers try to skip the servicer entirely with a “subject to” arrangement: the deed transfers, the mortgage stays in the seller’s name, and the buyer sends the payments. The lender never knows and never approves. This is not a mortgage assumption, and both sides take on serious risk.
If the lender finds out the title changed, it can accelerate the loan under the due-on-sale clause and demand the full balance within as little as 30 days.1Office of the Law Revision Counsel. 12 USC 1701j-3 Preemption of Due-on-Sale Prohibitions The seller stays fully on the hook for the debt, any missed payment hits their credit, and no release of liability exists because the lender never approved anything. The buyer, for their part, has no direct relationship with the lender at all, only a private agreement with the seller.
A formal assumption costs more upfront and takes longer, but it transfers the legal obligation cleanly. That is the whole point of going through the process rather than around it.