Is it worth assuming a 3% mortgage instead of getting a new loan?
Usually yes, if you can cover a good share of the seller's equity in cash. On a $350,000 balance at 3%, principal and interest are about $1,660 a month, against about $2,844 for a new $450,000 loan at 6.5%. Over the first five years that's roughly $93,000 less in interest.
If you have to finance the whole equity gap at a high rate, the payments end up close to a new loan's, and the longer closing may not be worth it.
The comparison
The same $500,000 home, bought two ways:
| Assume 3.0% loan | New loan at 6.5% | |
|---|---|---|
| Loan amount | $350,000 (25 yrs left) | $450,000 (30 yrs) |
| Cash at closing (before costs) | $150,000 equity gap | $50,000 down |
| Monthly principal + interest | $1,660 | $2,844 |
| Interest paid in the first 5 years | ≈$48,900 | ≈$141,900 |
Taxes, insurance and mortgage insurance are excluded. Illustrative only, not a quote.
The assumption needs $100,000 more cash up front, but saves about $1,180 a month. If part of the gap is financed with a second loan, the savings shrink. See the equity gap examples.
When assuming makes sense
- The assumed rate is well below today's rate (2–3% vs 6%+).
- The loan balance is a large share of the price, so the gap is small.
- You have cash for most of the gap, or the seller will finance part of it.
- You plan to stay several years. The savings build over time, and you can't refinance into a lower rate than 3% anyway.
- You can wait 45–90 days to close.
When a new loan may be better
- The gap is large and you'd finance all of it at a high second-loan rate.
- The remaining term is short, so the payment is high even at a low rate.
- You need to close quickly.
- You expect to refinance soon anyway.
Frequently asked questions
Is assuming a mortgage cheaper than getting a new one?
Monthly payments are usually much lower when the assumed rate is 2–4% and today's rates are above 6%, but you need more cash at closing to pay the seller's equity. Compare monthly payment and total interest, not just the rate.
Do I keep the low rate for the whole loan?
Yes. You take over the existing fixed rate and the remaining term.
What are the downsides of assuming a mortgage?
Larger cash needs for the equity gap, a slower closing (often 45–90 days), and fewer homes to choose from. FHA loans also keep their mortgage insurance terms.
See assumable homes for sale
Browse homes with assumable FHA and VA loans, with the rate, balance and estimated monthly payment on every listing.
Search assumable homes