Refinance Mortgage Calculator
Estimate whether refinancing your home loan can lower your payment, reduce total cost, and how long it may take to break even.
How to use this refinance mortgage calculator
This refinance a mortgage calculator compares your current loan against a potential new loan. It helps answer one practical question: Will refinancing actually improve your financial situation?
To get meaningful results, enter realistic values from your latest mortgage statement and one or more refinance offers. You can run the numbers multiple times by changing the rate, term, or closing costs.
Inputs explained
- Current Loan Balance: The principal you still owe today.
- Current Interest Rate: Your existing mortgage rate.
- Years Remaining: Time left on your current loan.
- New Interest Rate: The quoted rate for your refinance.
- New Loan Term: Common options are 10, 15, 20, or 30 years.
- Closing Costs: Lender fees, title costs, and other settlement charges.
- Cash-Out Amount: Additional funds borrowed beyond your current balance.
- Roll Closing Costs: If checked, costs are added to your new principal.
What the calculator shows
1) Current vs. new monthly payment
This is often the first number homeowners care about. A lower payment can free up cash flow, but it does not automatically mean lower total borrowing cost.
2) Total remaining cost
The calculator estimates total future payments under both options. This gives a clearer long-term view than monthly payment alone.
3) Estimated break-even point
If your monthly payment drops and you pay costs upfront, break-even is the number of months needed to recover those costs through monthly savings.
When refinancing may make sense
- You can secure a meaningfully lower interest rate.
- You plan to stay in the home beyond the break-even period.
- You want to switch from an adjustable-rate mortgage to fixed-rate stability.
- You want to shorten your term to reduce lifetime interest.
- You need to remove mortgage insurance (when eligible).
When refinancing may not be worth it
- You expect to move before reaching break-even.
- Closing costs are high relative to monthly savings.
- Your credit profile leads to only a small rate improvement.
- A new longer term increases total cost even if payment falls.
Rate-and-term refinance vs. cash-out refinance
Rate-and-term
Primarily aims to lower your rate, change term length, or both. Usually best for payment optimization or long-term interest savings.
Cash-out
Lets you borrow above current balance and receive cash at closing. Useful for debt consolidation or home improvements, but your principal and total interest exposure increase.
Common mistakes to avoid
- Focusing only on monthly payment and ignoring total paid over time.
- Comparing offers with different assumptions (points, fees, prepaid items).
- Resetting to a fresh 30-year term without considering lifetime cost.
- Not evaluating the opportunity cost of cash paid at closing.
Final takeaway
A refinance decision is a balance of rate, term, fees, and how long you will keep the loan. Use this calculator to test scenarios, then compare lender Loan Estimates side by side before you commit.