Refinance Calculator
A refinance calculator is a financial decision-making tool that compares your current mortgage with a new loan at a lower interest rate or different term to determine your monthly savings and the "break-even point" where your savings exceed the closing costs.
How to use this calculator
Estimate your monthly mortgage payment (PITI: Principal, Interest, Taxes, and Insurance). For the most accurate result, include optional expenses like property taxes, home insurance, and private mortgage insurance (PMI).
Introduction to Refinance Calculator
How to Use the Refinance Calculator
- Step 1: Enter Current Loan Details: Input your current remaining balance, interest rate, and the number of years left on your mortgage.
- Step 2: Enter New Loan Terms: Input the new interest rate and the new loan term (e.g., 15 or 30 years).
- Step 3: Estimate Closing Costs: Refinancing typically costs 2% to 5% of the loan amount. Enter the specific fees from your lender's "Loan Estimate."
- Step 4: Check for Cash-Out (Optional): If you are taking equity out for home improvements, enter the additional amount you wish to borrow.
- Step 5: Analyze the Break-Even Point: Review the monthly savings and see exactly how many months it takes for those savings to cover the upfront closing costs.
Understanding Refinance
The most important metric in refinancing is the Break-Even Point. If your closing costs are $5,000 and your new mortgage saves you $200 per month, your break-even point is 25 months ($5,000 / $200). If you plan to sell your home in two years, refinancing would actually lose you money. However, if you plan to stay for five or ten years, you would net thousands in savings. Our calculator does this math for you instantly. Another key strategy is the Term Reduction. Many homeowners refinance from a 30-year to a 15-year mortgage when rates drop. While your monthly payment might stay the same or even increase slightly, the amount of interest you save over the life of the loan can be staggering—often exceeding $100,000. Our tool allows you to compare different terms side-by-side to see which path builds your wealth fastest.
Be wary of the "No-Cost Refinance." In these deals, the lender either adds the closing costs to your loan balance or increases the interest rate to cover the fees. While this reduces your "out-of-pocket" expense today, it means you are paying interest on those costs for the next 30 years. Our calculator allows you to "roll in" the closing costs so you can see the true long-term impact on your principal balance. Finally, remember that refinancing restarts the clock on your mortgage. If you have already paid 10 years into a 30-year loan and refinance into a new 30-year loan, you are extending your debt by a decade. Consider a "custom term" (like a 20-year loan) to maintain your current payoff schedule while still benefiting from a lower rate.
Formula & Calculation Method
Monthly savings is the difference between old and new P&I payments. Break-even is closing costs divided by monthly savings.
Example Calculation:
Current payment $1,500, New $1,300. Savings = $200. Closing costs $4,000. Break-even = 20 months.
Tips for Accurate Results
- 1Only refinance if you can lower your rate by at least 0.75% to 1.0%, as this is typically what's needed to offset the closing costs.
- 2If your credit score has improved significantly since you bought the home, you might qualify for a much better rate regardless of the market.
- 3Consider a "Cash-Out Refinance" to pay off high-interest credit card debt, as mortgage rates are almost always lower than consumer credit rates.
- 4Ask your current lender for a "Loan Modification" or a streamlined refinance; they may waive some fees to keep your business.
- 5Lock your rate as soon as you get a quote you like; mortgage rates can change multiple times in a single day.
Key Facts About Refinance
- •The break-even point is when monthly savings exceed the closing costs.
- •Closing costs for a refinance typically range from 2% to 5% of the loan.
- •Refinancing from a 30-year to a 15-year loan can save $100k+ in interest.
- •A "Cash-Out" refinance allows you to use your home equity to pay off debt.
- •Rate-and-term refinancing is used primarily to lower monthly payments.
Frequently Asked Questions
How much does it cost to refinance?
Expect to pay 2% to 5% of the loan amount in closing costs, which includes appraisals, title insurance, and lender fees.
Is it worth refinancing for 0.5%?
Usually not, unless you have a very large loan balance or plan to stay in the home for more than 10 years.
Can I refinance with no equity?
It is difficult. Most lenders require at least 5% to 20% equity, although government programs like FHA Streamline or VA IRRRL allow for refinancing with little to no equity.
Related Calculators
Mortgage Calculator
Estimate your monthly mortgage payment with our free PITI calculator. Includes principal, interest, taxes, insurance, and PMI.
Mortgage Payoff Calculator
Pay off your mortgage faster. See how extra payments can shorten your loan term and calculate your total interest savings.
Home Affordability Calculator
How much house can I afford? Our calculator helps you determine a comfortable home budget based on your income, debts, and down payment.
Car Loan Calculator
Calculate your monthly car payment. Our free auto loan calculator helps you estimate payments and see the total interest cost for your new car.

