Mortgage Comparison Calculator

A mortgage comparison calculator lets you see the full financial picture of two different loan scenarios side by side — including monthly payments, total interest paid, and overall cost. This helps you make an informed decision rather than guessing which option saves you more money over time.

It depends on your financial situation. A 15-year mortgage typically comes with a lower interest rate and you pay far less total interest, but the monthly payment is significantly higher. A 30-year mortgage offers a lower monthly payment, giving you more cash flow flexibility, but you'll pay much more interest over the life of the loan.

Even a small difference in interest rate can translate to tens of thousands of dollars over a 30-year mortgage. For example, on a $300,000 loan, a 0.5% rate reduction can save over $30,000 in total interest. Use the calculator to input both rates and see the exact difference for your loan amount.

This calculator computes the principal and interest (P&I) portion of your monthly mortgage payment. It does not include property taxes, homeowner's insurance, or private mortgage insurance (PMI), which are additional costs you'll need to budget for separately.

Your credit score is one of the biggest factors lenders use to set your interest rate. Borrowers with scores above 760 typically qualify for the lowest available rates, while scores below 620 can result in significantly higher rates — or difficulty qualifying at all. Improving your score before applying can save you a substantial amount over the loan term.

This calculator uses a single shared loan amount for both scenarios to allow a clean apples-to-apples comparison. To compare different loan amounts, you can run multiple calculations and note the results for each scenario.

Pay close attention to prepayment penalties, adjustable-rate adjustment caps, balloon payment clauses, and any fees rolled into the loan. The APR (Annual Percentage Rate) is often more informative than the stated interest rate because it includes lender fees and gives a truer picture of the loan's cost.

Home improvement loans — such as FHA 203(k) loans or home equity loans — can be a cost-effective way to fund renovations without refinancing your entire mortgage. They often come with competitive rates and the interest may be tax-deductible. Compare the total costs carefully against a cash-out refinance before deciding.