Mortgage Comparison Calculator — Compare Loan Options Side by Side

How to Use the Mortgage Comparison Calculator

This mortgage comparison calculator lets you evaluate two loan scenarios side by side to determine which one is actually the better deal. Enter the home price, down payment percentage, interest rate, and loan term for Option A and Option B independently. The calculator instantly computes the monthly payment, loan amount, total interest, and total cost for each option and displays them in a clear side-by-side comparison table.

At the bottom of the results, you'll see a plain-language recommendation stating which option saves you money in total interest and by how much — so you don't have to do the mental math yourself.

What Should You Compare When Choosing a Mortgage?

• Interest rate — even a small difference compounds significantly over a 20-30 year loan term.
• Loan term — shorter terms save on total interest but raise the monthly payment; longer terms do the opposite.
• Down payment — a larger down payment reduces the loan amount and may eliminate PMI, changing the effective cost of each option.
• Total cost versus monthly affordability — the cheapest option in total interest isn't always the most affordable month-to-month, so consider both figures together.

How the Loan Comparison Is Calculated

For each option, this compare mortgages calculator independently works out the loan amount, monthly payment, total interest, and total cost based on that option's own home price, down payment, rate, and term. It then compares the two total interest figures directly and reports whichever option is actually lower, along with the dollar amount saved — so the recommendation always reflects your specific numbers rather than a generic assumption.

Tips for Comparing Mortgage Options

• Always compare official loan estimates from lenders, not just advertised rates, since fees can differ.
• Consider how long you plan to stay in the home — a shorter time horizon may favor a lower monthly payment over long-term interest savings.
• Factor in closing costs for each option if they materially differ between lenders.
• Re-run the comparison whenever a lender updates their rate quote, since even small changes shift the recommendation.
• Use this alongside the Refinance Calculator if you're comparing a new purchase loan against refinancing an existing one.