The short answer
An assumable mortgage lets a buyer take over the seller's existing home loan, including its interest rate, remaining balance and remaining term, instead of getting a brand-new loan. When the seller's rate is lower than today's rates, that can mean a lower monthly payment.
It's not automatic. Many loans can't be assumed, the buyer usually has to qualify with the lender or loan servicer, and the buyer typically has to cover the difference between the price and the loan balance.
Which loans can be assumed?
Government-backed loans, such as FHA, VA and USDA loans, are the ones most commonly described as assumable, subject to the loan's terms and the servicer's approval. Most conventional loans include a due-on-sale clause, which generally means the loan must be paid off when the home is sold.
Rules differ by loan type and change over time, so don't rely on a general article. The seller should call their loan servicer and ask directly whether the loan is assumable and what the process requires. A buyer should confirm the same thing with the servicer and with their own lender.
The equity gap is the biggest hurdle
If a home sells for well above the remaining loan balance, the buyer has to cover that difference, either in cash or with a second loan. In a market where values have risen since the seller bought, that gap can be large. A second loan often carries a higher rate, which can shrink the payment savings.
Run the full numbers: the assumed loan payment, any second loan, taxes, insurance, HOA dues and mortgage insurance if the existing loan has it. Shaune Corbett Group's Monthly Payment Calculator can help you compare that total with a new loan at today's rates.
What sellers should know
An assumable loan can make your home stand out to payment-sensitive buyers. But assumptions can take longer than a typical closing, and the servicer controls the timeline. Plan your move with that uncertainty in mind.
Ask your servicer whether you'd be released from liability on the loan after the assumption. For VA loans in particular, ask how an assumption affects your loan entitlement. These are questions for your servicer and, where needed, an attorney or the VA, not assumptions to make on your own.
What buyers should know
Expect to submit income, credit and asset documentation much like a regular loan. Ask the servicer for the current balance, rate, remaining term and any fees for the assumption before you write an offer that depends on it, and keep a backup financing plan in case the assumption isn't approved in time.
This article is educational, not financial or legal advice. Verify every detail with the loan servicer and your lender. When you're ready to map out timing and budget, a Personalized Move Plan puts the steps in order.