Assumable 101
What Is an Assumable Mortgage?
By David Golovin · September 6, 2026 · 4 min read
An assumable mortgage lets you take over the seller’s existing home loan when you buy the house. Same balance, same term, and most importantly, the same interest rate they locked in years ago.
How it works
Instead of getting a brand-new mortgage at today’s rate, you apply with the seller’s lender to take over their loan. You still go through underwriting, and once approved, the loan transfers to your name. If the seller locked a 3% rate in 2021, that 3% rate is now yours.
Which loans can be assumed
FHA, VA, and USDA loans are assumable. Most conventional loans are not, because they carry a due-on-sale clause that forces a payoff when the home changes hands. Millions of homes financed with government-backed loans during the low-rate years qualify.
What it costs
Closing costs on an assumption are typically lower than on a new loan, and there is no new appraisal requirement in many cases. The big number to plan for is the downpayment: you cover the difference between the sale price and the loan balance. If a home sells for $400,000 with a $320,000 assumable balance, you bring $80,000, through cash, a second loan, or a combination.
Estimated Assumption Savings Calculator
Home price
Assumable loan balance
Assumable interest rate
Current market rate
Estimated results
All figures are estimates based on a 30-year fixed term and standard amortization. Market loan assumes 20% down on the home price. Downpayment gap is the difference between the sale price and the assumable loan balance and may be financed separately. This calculator is for educational purposes only. Roots is a licensed brokerage, not a lender. All loan approvals and credit decisions are made by the lender.
How long it takes
Assumptions run through the seller’s loan servicer, so timelines vary. Assumptions typically take 60 to 120 days. Roots coordinates the process end to end, and our assumption closings average about 43 days.
How to find one
Most portals don’t show loan details, which is why these homes are hard to find. Roots shows the rate, estimated downpayment, and estimated monthly payment on assumable listings for free.
FAQ
Do I have to be a veteran to assume a VA loan?
No. Any creditworthy buyer can assume a VA loan with lender and VA approval. The seller’s VA entitlement typically stays tied up until the loan is paid off unless the buyer is also an eligible veteran who substitutes entitlement.
Can I assume a conventional loan?
Usually not. Most conventional loans have a due-on-sale clause that requires the loan to be paid off when the home sells. Assumable loans are almost always FHA, VA, or USDA.
Do I still have to qualify?
Yes. The seller’s lender reviews your credit, income, and debts just like a new mortgage application. You are taking over the loan, not skipping underwriting.
If assuming a mortgage is this good, why doesn’t everyone do it?
Two reasons: these homes are hard to find because most listing sites don’t show loan details, and buyers need to cover the gap between the sale price and the loan balance. Roots solves the first problem by showing the rate and estimated downpayment on assumable listings for free.