Considering a rate change or term adjustment? Use this refinance home mortgage calculator to estimate your new monthly payments and determine if refinancing makes financial sense for your situation.
Refinance Home Mortgage Calculator
Refinance Home Mortgage Calculator Formula
When refinancing, you are essentially taking out a brand new mortgage to pay off your old one. The formula for the new payment is the standard amortization equation:
Variables
- M: New Monthly Principal & Interest Payment.
- P: New Principal Loan Amount (Payoff Balance + Closing Costs).
- i: New Monthly Interest Rate (Annual Rate / 12).
- n: New Loan Term (Years × 12).
Related Calculators
- Refinance Breakeven Calculator
- Cash-Out Refinance Calculator
- 15 vs 30 Year Mortgage Calculator
- Closing Cost Estimator
What is Refinance Home Mortgage Calculator?
A refinance home mortgage calculator helps homeowners analyze the financial impact of replacing their current loan. The primary reasons to refinance include lowering the interest rate, reducing the monthly payment, shortening the loan term, or accessing home equity.
This tool allows you to input the details of a prospective new loan and compare the resulting payment against your current obligation. This comparison helps determine if the monthly savings are significant enough to cover the upfront closing costs associated with refinancing.
How to Calculate Refinance Home Mortgage Calculator (Example)
Scenario: You have a balance of $220,000. You are offered a rate of 5.0% on a 20-year term.
- New Principal (P): $220,000.
- New Rate (r): 5.0%. Monthly Rate = 0.05 / 12 = 0.004167.
- New Term (n): 20 Years × 12 = 240 Months.
- Calculation:
- Numerator: 0.004167 × (1.004167)^240 ≈ 0.0113.
- Denominator: (1.004167)^240 – 1 ≈ 1.7126.
- New Payment: ~$1,451.91.
Frequently Asked Questions (FAQ)
Generally, refinancing makes sense if you can lower your rate by 0.75% to 1% or more. However, calculate your “breakeven point”—how many months of savings it takes to pay back the closing costs.
Yes. If you have 22 years left on a 30-year loan and refinance into a new 30-year loan, you are extending your debt repayment period. Many homeowners refinance into a shorter term (e.g., 15 or 20 years) to avoid this.
Closing costs for a refinance typically range from 2% to 5% of the loan amount. These include appraisal fees, title insurance, origination fees, and recording fees.
Yes, a “cash-out refinance” allows you to borrow more than you owe and take the difference in cash. This increases your loan balance but provides funds for home improvements or debt consolidation.