Free Mortgage Refinance Calculator Spreadsheet Template
Compare current mortgage costs with refinance options. Calculate break-even point and total savings from refinancing.
What's Included
- Dashboard with refinance comparison showing current vs. new monthly payment, total interest, and net savings
- Calculator with current loan details and proposed refinance terms including new rate, term, and closing costs
- Break-even timeline showing the exact month when cumulative payment savings exceed the refinance closing costs
- Monthly payment difference displayed as dollar savings per month between the old and new mortgage terms
- Total cost comparison over the full loan life with color-coded input cells for clear scenario modeling
- Works in Microsoft Excel, Google Sheets, and LibreOffice Calc with no setup required
Preview
See what's inside this template
How to Use This Mortgage Refinance Calculator Template
Enter current loan details
Input your current balance, rate, remaining term, and monthly payment on the calculator sheet.
Enter refinance terms
Add the proposed new rate, new term, and estimated closing costs for the refinance option.
Review monthly savings
The dashboard shows the new monthly payment alongside the current one, with the dollar difference per month.
Check the break-even point
The break-even timeline shows exactly when cumulative monthly savings exceed the closing costs of refinancing.
Built by Claude AI. Perfected by us.
We use Claude AI to draft each free template, after a deep research. Then our team steps in. We refine the layout, stress-test every formula, fix edge cases, and polish the design until it feels like something we would actually use ourselves. The AI gets us 80% there. The last 20% is all human judgment.
Frequently Asked Questions
How is the break-even calculated?
Break-even divides closing costs by the monthly savings. The result is the number of months until the refinance pays for itself.
Does it include closing costs in the new loan?
You can model closing costs as an upfront expense or rolled into the new loan balance. Adjust the new balance to include them if you prefer to finance the costs.
Should I refinance for a longer term?
The calculator shows total cost for both scenarios. A longer term may lower the monthly payment but increase total interest paid over the life of the loan.
Does it compare total cost over the full term?
Yes. The comparison shows total payments and total interest for both the current loan and the refinance option through the end of each loan.
How do I open this in Google Sheets?
Upload the .xlsx file to Google Drive, then open it with Google Sheets. All formulas and formatting will be preserved.
What license is this template under?
All free templates are released under CC BY 4.0 (Creative Commons Attribution). You can use, modify, and share them freely - including for commercial purposes - as long as you credit FinancialAha.com. They are provided as-is and do not constitute financial advice.
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