About CalcRefi

CalcRefi exists to answer one question honestly: will refinancing your mortgage actually save you money?

Most refinance tools are built by lenders, and lenders benefit when you refinance — so their calculators emphasize the lower monthly payment and stay quiet about the parts that cost you: closing costs, restarted loan terms, and the months it takes to break even. CalcRefi is not a lender, broker, or advisor. Our calculator shows the payment change and the lifetime interest change and the break-even point, because a refinance that lowers your payment can still lose you money, and you deserve to see that before you apply.

How the calculator works

We use the standard amortization formula for fixed-rate mortgages to compute principal-and-interest payments for your current and proposed loans, then compare total interest across both (including your closing costs) and divide costs by monthly savings to find your break-even month. Every calculation runs in your browser — the numbers you enter are never transmitted to or stored on our servers.

How we make money

CalcRefi is free and supported by advertising, and may include clearly labeled affiliate links to services such as rate-comparison tools. Advertising never changes calculator results, and our guides recommend not refinancing whenever the math says so — see When NOT to Refinance.

What we are not

We do not provide financial, legal, or tax advice; our results are estimates based on the figures you enter. Actual rates and costs vary by lender and your circumstances. Verify all figures with a licensed mortgage professional before making decisions.

Questions or corrections? Reach us through the contact page — we read everything.