Refinance Calculator

What Is a Refinance Calculator?

Refinancing your mortgage can lower your monthly payment, reduce your total interest, or help you pay off the loan faster. But refinancing also comes with closing costs, so it only makes financial sense if you stay in the home long enough to recoup those costs through your monthly savings.

As of July 9, 2026, the Freddie Mac 30-year fixed mortgage rate averaged 6.49%, down from 6.72% a year ago. Zillow's refinance rates for July 15, 2026 showed the 30-year fixed refinance at 6.53% and the 15-year fixed refinance at 6.00%. For homeowners who bought during the 2022-2023 rate peak (when rates hit 7.79% in late October 2023), refinancing into today's rates could save $200 to $400 per month on a typical $400,000 loan. For mortgage payment calculations, see our Mortgage Calculator or Loan Calculator.

What This Calculator Does

This refinance calculator compares your current mortgage against a new loan, showing your monthly savings, the break-even point, and the net interest savings after accounting for closing costs.

Inputs Required

• Current Balance: The remaining amount owed on your existing mortgage
• Current Rate: Your existing interest rate
• Remaining Years: How many years are left on your current loan
• New Interest Rate: The rate offered on the refinanced loan (30-year refinance averaged 6.53% as of July 15, 2026)
• New Loan Term: The repayment period for the new loan
• Closing Costs: Fees paid upfront to complete the refinance (typically 2% to 5% of the loan amount)

Outputs Provided

• Monthly Savings: Reduction in monthly payment after refinancing
• Break-Even Point: How long until savings exceed closing costs
• Net Interest Savings: Total interest saved minus closing costs over the new loan life
• Cumulative Cost Chart: Visual comparison of total payments over time for both loans

How the Calculation Works

The calculator uses the standard amortization formula for both the current and new loan to determine monthly payments and total interest paid over each loan's remaining life.

The break-even point tells you the minimum number of months you need to stay in the home for refinancing to be worthwhile. The cumulative cost chart shows where the two cost lines cross, making the break-even visual and intuitive.

How to Use the Calculator

1. Enter your current mortgage balance, rate, and remaining years
2. Input the new rate and term you have been offered
3. Enter estimated closing costs (ask your lender for a Loan Estimate)
4. Review your monthly savings and break-even timeline
5. Compare the cumulative cost chart to see when refinancing begins to pay off

Example Calculations

Example 1: Refinancing from 7.25% to 6.49%

Robert, a homeowner in Dallas, has $400,000 remaining on his mortgage at 7.25% with 27 years left. He receives an offer to refinance at 6.49% for 30 years with $10,000 in closing costs.

• Current monthly payment: $2,919
• New monthly payment: $2,523
• Monthly savings: $396
• Break-even: $10,000 / $396 = approximately 25 months
• If Robert plans to stay 5+ years, refinancing saves him $4,752 per year after the break-even point

Example 2: Shortening from 30 to 15 Years

Maria in Seattle has $320,000 remaining at 6.75% with 26 years left. She refinances into a 15-year fixed at 6.00% with $7,500 in closing costs.

• Current monthly payment: $2,071
• New 15-year monthly payment: $2,706 (higher, but loan pays off 11 years sooner)
• Total interest on current loan (remaining 26 years): $326,160
• Total interest on new 15-year loan: $167,080
• Net interest savings: $326,160 - $167,080 - $7,500 = $151,580
• Break-even is not applicable here because the monthly payment increases. The savings come from paying far less total interest over a shorter term

Example 3: Moving Soon

James in Denver has $350,000 remaining at 7.5% with 28 years left. He considers refinancing to 6.49% with $9,000 in closing costs, but plans to sell in 2 years.

• Monthly savings: $249
• Break-even: $9,000 / $249 = approximately 36 months
• Since James plans to sell in 24 months, he will not reach the break-even point
• Net result: James loses $9,000 - ($249 x 24) = $3,024 by refinancing

The calculator makes this trade-off clear, saving James from a costly mistake.

Real-World Scenarios

2022-2023 Homeowners: The Main Refinance Audience

Homeowners who bought or refinanced during 2022-2023 when rates peaked above 7.5% are the primary candidates for refinancing in 2026. With the Freddie Mac 30-year average at 6.49% as of July 2026, a borrower with a $400,000 loan at 7.25% can save approximately $331 per month by refinancing to 6.00%. Against closing costs of $8,000 to $12,000, the break-even range is 25 to 37 months. If rates drop further into the low 6% or high 5% range, the refinance universe broadens significantly. Borrowers with sub-4% rates from 2020-2021 have little incentive to refinance for a lower rate.

No-Closing-Cost Refinance Option

Some lenders offer no-closing-cost refinances where the lender either rolls costs into the loan balance or charges a slightly higher interest rate (typically 0.25% to 0.50% higher). For a homeowner planning to sell within 3 to 4 years, a no-closing-cost refinance at 6.75% (versus 6.49% with $10,000 upfront) may be the better choice. The calculator lets you model both scenarios by adjusting the rate and closing cost inputs to compare total costs over your expected time horizon.

Cash-Out Refinance for Home Improvements

A homeowner in Phoenix bought in 2019 at $340,000. The home is now worth $520,000, giving $180,000 in equity. She refinances her remaining $280,000 balance plus takes out $50,000 cash for a kitchen renovation, totaling a $330,000 new loan at 6.49%. The calculator shows her new monthly payment and helps her confirm that the renovation adds enough value to justify the larger loan. For comparing home equity loan options, she also checks our Finance Calculator.

Why This Calculation Matters

Refinancing at the wrong time or without understanding the costs can actually cost you money. Many homeowners refinance repeatedly without factoring in closing costs, extending their total loan life and paying far more in interest overall. The break-even analysis is especially critical. If you are likely to sell or move before reaching the break-even point, refinancing loses money even if the new rate is significantly lower.

In 2026, with rates at 6.49%, the decision to refinance depends heavily on your original rate. Borrowers with rates above 7% are the strongest candidates. Those with rates below 5% should generally keep their current mortgage and consider a HELOC if they need cash.

Common Mistakes to Avoid

• Only looking at monthly savings: Monthly savings are only valuable if you stay long enough to break even on closing costs. Always calculate the break-even point first
• Resetting to a 30-year term every time: Repeatedly refinancing into a new 30-year term can extend debt for decades longer than necessary. If you have 22 years left, consider a 20-year or 15-year refinance to avoid resetting the clock
• Ignoring total interest paid: A lower rate on a longer term can result in more total interest than keeping the current loan. Compare total interest, not just monthly payments
• Underestimating closing costs: Closing costs of 2% to 5% on a large loan are significant. On a $400,000 loan, that is $8,000 to $20,000. Get a formal Loan Estimate from your lender before deciding
• Not considering no-closing-cost options: Some lenders offer no-closing-cost refinances in exchange for a slightly higher rate (typically 0.25% to 0.50% higher). Compare both approaches using this calculator

Authoritative Research & Resources

• Freddie Mac Primary Mortgage Market Survey - The 30-year fixed-rate mortgage averaged 6.49% for the week of July 9, 2026, up from 6.43% the prior week and down from 6.72% a year ago. Updated weekly every Thursday. This is the benchmark rate used by lenders and financial media nationwide.
• Yahoo Finance: Mortgage and Refinance Rates (July 15, 2026) - Zillow marketplace data shows 30-year refinance rates at 6.53%, 15-year at 6.00%, and 5/1 ARM at 6.53% as of July 15, 2026. Refinance rates are often slightly higher than purchase rates.
• True Home Payment: Should I Refinance My Mortgage in 2026? - Detailed analysis of 2026 refinance scenarios, including break-even tables for different original rates and loan amounts. The main refinance audience is borrowers who locked rates in the mid-6% to 7%+ range during 2022-2023.
• Consumer Financial Protection Bureau: Mortgage Closing Checklist - The CFPB provides guidance on understanding your Loan Estimate, comparing closing costs, and knowing your rights during the refinance process. Always request a Loan Estimate from at least three lenders to compare offers.