Assumable Mortgage Savings Calculator
Compare the estimated cost of assuming a seller's existing mortgage against financing the same purchase with a new mortgage, including the equity gap and any second financing.
What this calculator estimates
The potential savings from assuming a lower-rate mortgage depend on the balance being assumed, its rate and remaining term, the rate available on an alternative new mortgage, the seller's equity gap, and any secondary financing. This tool compares those scenarios as an educational estimate. It never issues an approval, a rate quote, or a guarantee of savings.
EDUCATIONAL ESTIMATE, NOT A QUOTE OR APPROVAL
Assumption vs. New Mortgage
Enter the assumed loan, the equity gap and your alternatives. Entered rates are illustrations only, not today's market.
Purchase & Assumed Loan
Alternative New Mortgage
Equity Gap (cash you bring)
Equity gap = purchase price minus assumable balance. Cash plus any second financing should total the full gap, or the buyer brings more cash.
Monthly Ownership Costs (same in both scenarios)
Mortgage insurance may differ between an assumed loan and a new loan; enter the monthly amount that applies to each in your comparison.
Estimated Comparison
Equity gap
$150,000
Estimated monthly difference
$0
New mortgage minus assumption. Negative = assumption lower.
Annual difference
$0
Illustrative 5-year difference
$0
What this means
Compare the combined assumption payment against the alternative new-mortgage payment on the same ownership carries. Educational only; the servicer and your lender provide real figures.
For educational estimates only.
Actual rates, payments, mortgage insurance, taxes, insurance, fees and qualification vary. Financing depends on credit, income, assets, debt, property, lender and loan-program requirements. No approval or savings is guaranteed.
Assumption qualification, actual balances, current rates and program rules come from the loan servicer and the applicable agency (FHA Handbook 4000.1, VA servicing guidance, or your lender). Entered rates are illustrative only, never today's market. Lisa is a Nevada REALTOR®, not a lender.
The math can work. Now find the homes where it works.
If the numbers show an assumption could matter, Lisa can build the property search around homes whose financing may be assumable, and coordinate the real estate side while your servicer and lender confirm the financing.
Assumable Mortgages Hub
The full assumption library.
Assumption vs. New Mortgage
Compare the whole transaction.
Is an Assumable Mortgage Worth It?
Rate, balance and gap, together.
Assumable Monthly Savings
How to compare the numbers properly.
Second Mortgage With an Assumable Loan
Modeling the equity gap financing.
Find Homes With Assumable Mortgages
Make the loan part of the search.