Free Mortgage Comparison Calculator (2026)
Compare two loan offers side by side. Calculate instantly — no signup required. Updated for 2026.
What Is a Mortgage Comparison Calculator?
A mortgage comparison calculator lets you evaluate two (or more) mortgage offers side by side, showing the differences in monthly payments, total interest costs, and overall loan expense. When shopping for a mortgage, you will receive different quotes from different lenders — varying in interest rate, closing costs, discount points, and loan terms. This calculator helps you make an apples-to-apples comparison to determine which offer truly costs less over your expected ownership period.
The cheapest monthly payment is not always the best deal. A loan with a slightly higher rate but $3,000 less in closing costs might actually cost you less if you plan to sell or refinance within 5 years. This calculator factors in all costs — not just the rate — to give you a complete picture.
What This Calculator Compares
For each loan option, you enter:
- Loan Amount: The amount you plan to borrow (this may differ if one option requires a different down payment).
- Interest Rate: The offered annual rate.
- Loan Term: 15, 20, or 30 years.
- Closing Costs: Total fees charged by each lender.
- Discount Points: Prepaid interest to buy down the rate (1 point = 1% of loan amount).
The calculator then shows monthly payment differences, total interest over the full term, total cost (interest + closing costs + points), and the break-even point if one loan has higher upfront costs but a lower rate.
Step-by-Step Example
| Feature | Loan A | Loan B |
|---|---|---|
| Loan Amount | $340,000 | $340,000 |
| Interest Rate | 6.375% | 6.00% |
| Term | 30 years | 30 years |
| Closing Costs | $4,200 | $7,800 |
| Points | 0 | 1 ($3,400) |
| Monthly P&I | $2,122 | $2,039 |
| Total Upfront | $4,200 | $11,200 |
| Total Interest (30yr) | $423,880 | $393,940 |
| Total Cost | $428,080 | $405,140 |
Monthly Savings with Loan B: $83/month
Extra Upfront Cost of Loan B: $7,000
Break-Even: $7,000 ÷ $83 = 84 months (7 years)
If you plan to stay in the home longer than 7 years, Loan B saves $22,940 over the full term. If you might sell within 7 years, Loan A is the better choice because you would not recoup the higher upfront costs.
Tips for Getting Accurate Results
- Get Loan Estimates from at least 3 lenders: Federal law requires lenders to provide a standardized Loan Estimate within 3 business days of application — use this form for accurate comparisons.
- Compare APR, not just the rate: The Annual Percentage Rate (APR) incorporates closing costs and points into an effective rate, making cross-lender comparisons easier.
- Factor in your timeline: The break-even analysis is crucial. Points and higher closing costs only pay off if you keep the loan long enough to recoup them.
- Negotiate: Lenders expect you to shop around. Show them competing offers and ask them to match or beat the best terms you have received.
- Do not focus only on the monthly payment: A 30-year loan at 6.0% has a lower payment than a 15-year at 5.75%, but the 15-year saves over $150,000 in total interest.
Key Takeaways
- The lowest interest rate is not always the best deal — total cost (including closing costs and points) is what matters.
- Break-even analysis reveals when a lower-rate, higher-cost loan becomes worth it. Plan accordingly based on how long you expect to keep the mortgage.
- On a $340,000 loan, buying down the rate from 6.375% to 6.00% with 1 point costs $3,400 upfront but saves $29,940 in interest over 30 years.
- Always get quotes from multiple lenders and compare using standardized Loan Estimate forms.
Frequently Asked Questions
How do I compare mortgage offers from different lenders?
Request a standardized Loan Estimate form from each lender, which breaks down the rate, monthly payment, closing costs, and APR in a consistent format. Then use a comparison calculator to analyze total cost over your expected ownership period, monthly payment difference, and break-even point for any differences in upfront costs. Focus on total cost rather than just the monthly payment or rate alone.
Are mortgage points worth buying?
Discount points (each point = 1% of the loan amount) reduce your rate by typically 0.25%. Whether they are worth it depends on your break-even period. If 1 point on a $340,000 loan ($3,400) saves $83/month, the break-even is 41 months. If you keep the loan beyond 41 months, the points save money. If you sell or refinance sooner, you lost money on the points. Generally, points make sense for borrowers who plan to stay in the home 5+ years.
What is the difference between interest rate and APR?
The interest rate is the cost of borrowing the principal amount. The APR (Annual Percentage Rate) includes the interest rate plus certain fees and points, expressed as a yearly rate — making it a more comprehensive measure of the loan’s true cost. A loan with a 6.0% rate and high fees might have a 6.35% APR, while a loan with a 6.25% rate and low fees might have a 6.32% APR. The second loan is actually cheaper despite the higher rate.
How many mortgage quotes should I get?
Financial experts recommend getting quotes from at least 3-5 lenders, including a mix of banks, credit unions, and online lenders. Research by the Consumer Financial Protection Bureau (CFPB) found that getting just one extra quote saves borrowers an average of $1,500 over the life of the loan, and getting five quotes can save $3,000+. All credit inquiries for mortgage quotes within a 14-45 day window count as a single inquiry on your credit report.
Should I choose a 15-year or 30-year mortgage?
A 15-year mortgage offers a lower interest rate (typically 0.5-0.75% less) and dramatically lower total interest cost — often saving $100,000-$200,000+ compared to a 30-year. However, monthly payments are roughly 40-50% higher. Choose 15 years if you can comfortably afford the higher payment and want to build equity and pay off debt faster. Choose 30 years if you need budget flexibility, want lower required payments, or plan to invest the monthly savings elsewhere for potentially higher returns.