What an assumption is
In an assumption, the buyer takes over the seller’s existing mortgage instead of getting a new one. The interest rate, remaining balance and remaining term stay as they are. Most conventional loans have a due-on-sale clause that prevents this, which is why assumptions are mainly associated with government-backed loans: FHA and VA (and USDA) loans.
Assuming an FHA loan
HUD’s FHA guidance states that FHA-insured mortgages can be assumed. For loans originated in recent decades, the buyer typically has to meet the lender’s credit and income review, and FHA programs generally expect the buyer to occupy the home as a principal residence, with limited exceptions. When the assumption is approved, the servicer can release the original borrower from liability. Ask the servicer for its assumption package and timeline early, because HUD rules give lenders a processing window once the file is complete.
Assuming a VA loan
VA loans can be assumed with the approval of the VA or the servicer. The key issue is entitlement. A veteran’s VA entitlement stays with the loan unless the buyer is an eligible veteran who agrees to substitute their own. If a non-veteran assumes the loan, the seller’s entitlement remains tied up in that loan, which can limit the seller’s ability to use a VA loan again for a similar amount until the loan is paid off. The seller should also request a release of liability, because without one the original veteran can remain responsible if the new owner defaults. VA and servicers may charge processing and funding fees on assumptions; ask for the amounts.
The equity gap: the part most buyers miss
The low rate comes with a catch: you pay the seller the difference between the price and the loan balance. If the seller owes $280,000 on a home that sells for $450,000, the gap is $170,000. A new mortgage covers most of the price. An assumption covers only the existing balance, so you need cash, a second loan or both to bridge the rest. That is why the buyers who benefit most are those with significant savings, or sellers who bought recently with little equity.
A worked example
Illustrative rates, not quotes. A $450,000 home. The seller’s loan: $280,000 balance, 3.25% rate, about 26 years left. You have $90,000 to put down (20%).
| Assume the seller's loan | Get a new 80% loan | |
|---|---|---|
| First mortgage | $280,000 at 3.25% | $360,000 at 6.75% |
| Equity gap to cover | $170,000 | n/a |
| Your cash down payment | $90,000 | $90,000 |
| Second loan needed | $80,000 at 9.00%, 15 years | none |
| First mortgage payment (P&I) | $1,331 | $2,335 |
| Second loan payment | $811 | - |
| Total monthly P&I | $2,142 | $2,335 |
Even with a 3.5-point lower rate on the first mortgage, the savings shrink to about $193 a month once the second loan is included, and you carry two loans. A larger cash down payment makes the assumption far more attractive; a smaller one erodes the benefit. Test your own numbers with the mortgage payment calculator and see the full cash picture in the cash-to-close calculator.
Risks and checklist
Risks
- The servicer may deny the assumption or take longer than your contract allows.
- The equity gap may need a second loan at a high rate, or more cash than you have.
- FHA mortgage insurance, and any VA funding fee on an assumption, may add cost.
- A VA assumption by a non-veteran ties up the seller's entitlement, which may affect their willingness to agree.
- Rate advantage disappears if the seller's loan has a short remaining term and a high payment.
Checklist
- Ask the listing agent if the loan is assumable, and get the servicer's name and the loan balance, rate and remaining term.
- Contact the servicer for its assumption requirements, fees and timeline before you write an offer.
- Add a contingency for the assumption approval and a realistic closing date.
- Line up funding for the equity gap.
- Make sure the seller will receive a release of liability.
- Compare against a new loan using real quotes; see how to compare Loan Estimates.
Compare any new-loan alternative line by line using the Loan Estimate checklist, and consider whether you could refinance the assumed loan later (see buy now, refinance later, though with a low assumed rate, a refinance usually makes less sense). Your pre-approval should reflect the structure you plan to use.
Sources and further reading
Written by the Reaixo editorial team. Last reviewed . Educational information, not financial, legal or tax advice.