Home Mortgage Calculator Pro
Compare 3 loan scenarios with full amortization schedules, extra payment analysis, and a built-in refinance calculator.
Free vs Pro
- Single loan setup with monthly payment calculation
- Dashboard with monthly payment, total interest, and total cost
- Basic amortization schedule
- Works in Excel and Google Sheets
- Set up and compare 3 loan scenarios side by side with loan amount, interest rate, term, and start date
- Dashboard with 6 KPI cards: best monthly payment, best total interest, loan count, total amount borrowed, lowest rate, and best term
- Full amortization schedule for each scenario with payment number, date, payment amount, principal, interest, and remaining balance
- Scenario comparison sheet ranking all 3 loans by monthly payment, total interest, total cost, and break-even analysis
- Extra payment analysis showing how additional monthly, annual, or one-time payments reduce interest and shorten the loan term
- Refinance calculator comparing current loan vs new loan: monthly savings, total interest savings, break-even months, and 5-year net savings
- Conditional formatting highlights the lowest-cost option in each comparison column
- Works in Microsoft Excel, Google Sheets, and LibreOffice Calc with no macros required
Preview
See what's inside this template
How to Use This Template
Enter your loan scenarios
Go to the Loan Setup sheet and fill in details for up to 3 scenarios: loan amount, annual interest rate, loan term in months, and start date.
Review amortization
The Amortization sheet generates a full payment-by-payment schedule for each loan showing principal, interest, and remaining balance.
Compare scenarios
The Scenario Comparison sheet ranks all 3 loans by monthly payment, total interest paid, and total cost side by side.
Model extra payments or refinancing
Use the Extra Payment Analysis to see the impact of paying more each month, or the Refinance Calculator to evaluate switching loans.
Built by Claude AI. Perfected by us.
We use Claude AI to draft each Pro template after deep research. Then our team steps in - refining the layout, stress-testing every formula, fixing edge cases, and polishing the design. The AI gets us 80% there. The last 20% is all human judgment.
One-time purchase. No subscription. Works in Excel & Google Sheets.
Frequently Asked Questions
How many loan scenarios can I compare?
The Pro version lets you set up 3 separate loan scenarios - for example, a 30-year fixed, 15-year fixed, and 20-year fixed - and compare them side by side on payment, total interest, and total cost.
How does the extra payment analysis work?
Enter an extra monthly payment, a one-time lump sum, or an extra annual payment. The template calculates how much interest you save and how many months are removed from the loan term.
What does the refinance calculator show?
Enter your current loan details and the proposed new loan terms. The calculator shows monthly payment difference, total interest savings, break-even point in months, and net savings over 5 years after accounting for closing costs.
How long are the amortization schedules?
The amortization sheet covers up to 360 payments (30 years). It shows the date, payment number, payment amount, principal portion, interest portion, and remaining balance for every payment.
Can I use this for other loan types?
Yes. The calculator works for any fixed-rate installment loan - home equity loans, personal loans, or auto loans - as long as the rate and term are fixed.
What do I get after purchase?
You receive an Excel file (.xlsx) that works in Microsoft Excel, Google Sheets, and LibreOffice Calc. Download it immediately after purchase - no signup or account required.
Is there a free version?
Yes. The free version of this template is available with basic features. The Pro version adds advanced analysis, more capacity, and additional sheets.
What if it does not work for me?
Contact us and we will help troubleshoot. The template works in Microsoft Excel, Google Sheets, and LibreOffice Calc with no macros required.
Looking for more Pro templates?
We offer Pro versions of our most popular spreadsheet templates with advanced features, more capacity, and deeper analysis.