Assumable Mortgages: Taking Over a Seller's Low Rate in Massachusetts

An assumable mortgage is one a buyer can take over from the seller: the same interest rate, the same remaining balance, the same remaining term. When the seller's loan carries a rate far below what a new loan would cost, that is worth a great deal, and buyers have been asking about it ever since rates rose.

The short answer is that government-backed loans — FHA, VA and USDA — are generally assumable by a buyer the lender approves, and most conventional loans are not. The longer answer is that in Greater Boston the obstacle is rarely the loan's paperwork. It is the difference between the loan balance and the price, which the buyer has to cover some other way.

Which loans can be assumed

FHA loans are assumable, subject to the servicer reviewing the buyer's creditworthiness the way a new FHA loan would be reviewed.
VA loans are assumable, by veterans and non-veterans alike, with the servicer's approval of the buyer's credit and income.
USDA loans can be assumed in some circumstances, though USDA properties are uncommon in the inner suburbs.
Conventional loans almost always carry a due-on-sale clause: the lender may demand the full balance when the property is sold. Federal law limits when a lender may enforce that clause — transfers to a spouse or a child, on a death, or into the borrower's own living trust are protected — but an arm's-length sale to a buyer is not, so a conventional loan generally cannot be assumed by a buyer.

Before going further, ask the seller what kind of loan they have and who services it. Their mortgage statement will say.

How an assumption works, step by step

1.The buyer applies to the seller's servicer, not to a lender of their choosing. The servicer reviews income, credit and assets much as for a new loan.
2.The servicer approves or declines. Processing times vary and can be long; servicers do not always staff assumptions the way they staff new lending. Build that into your timeline and your mortgage contingency.
3.The buyer covers the gap between the loan balance and the purchase price, in cash or with a second loan.
4.At closing, the buyer takes title and the obligation on the existing loan, and the seller receives their equity.

There is usually an assumption fee, set by the loan programme and the servicer, and the buyer still pays most of the ordinary closing costs: title insurance, attorney's fees, recording fees and prorations. What a buyer pays at closing has the full list.

The equity gap is where most assumptions end

This is arithmetic, and it is unforgiving in an expensive market.

Take an illustrative house: the seller bought it some years ago with an FHA loan, and the balance today is $420,000 at a rate well below today's. The house is now under agreement at $700,000. The buyer can assume the $420,000, but the other $280,000 has to come from somewhere.

The options:

Cash. Few buyers have it, and a buyer who does may be better served by a conventional loan with a large down payment.
A second mortgage for part of the gap. Some lenders offer one behind an assumed loan, and some do not. Its rate will be higher than the assumed loan's, so the blended rate across both is what you compare against a single new loan.
A combination, which is where the mortgage calculator earns its keep: model the assumed loan and the second loan together, then compare the total payment with a single new loan at today's rate.

The longer the seller has owned and the more the house has appreciated, the bigger the gap, which is why assumptions work most often on recent purchases and lower-priced condominiums.

What a VA seller must understand about entitlement

A seller with a VA loan should read this section before agreeing to an assumption.

VA entitlement — the guarantee that lets a veteran buy with little or no money down — stays tied to the loan until it is paid off. If a non-veteran assumes the loan, the seller's entitlement remains committed to it, which can limit their ability to use a VA loan for their next home.

The way around it is a substitution of entitlement: if the buyer is an eligible veteran with sufficient entitlement of their own, they can substitute theirs and the seller's is restored. A seller should know which situation they are in before accepting an offer that depends on an assumption.

Separately, every seller should insist on a release of liability from the servicer. Without one, the seller can remain legally responsible for a loan they no longer control on a house they no longer own.

Questions to ask before you write the offer

What type of loan is it, and who services it?
What is the current balance, the rate and the remaining term?
Will the servicer confirm the loan is assumable and give an estimated timeline?
Will a second mortgage be available to cover the gap, and at what rate?
For a VA loan: will the seller require a buyer who can substitute entitlement?
Will the seller receive a release of liability?

Put the assumption into the offer as a specific condition, with a realistic date and a fallback. A seller who has other offers will weigh an assumption's longer and less certain timeline against them, so be prepared to show the servicer has already been contacted. Arriving at your offer covers how terms trade against price.

When a seller credit beats an assumption

For many buyers in this market, a conventional loan with a seller-funded rate buydown gets a meaningful part of the same benefit with far less friction. Rate buydowns and seller credits compares the two approaches, and which mortgage fits sets out the loan types themselves.

General information as of 2026, not lending advice. Assumption rules, fees and timelines are set by FHA, VA, USDA and each servicer, and change; the servicer's written terms govern any specific loan.