FinanceUpdated 2026-05-21

Mortgage Refinance Calculator

Estimate simple monthly savings and break-even months for refinancing.

Old monthly paymentNew monthly paymentClosing costs

Inputs

Mortgage Refinance Calculator

Results update as you type.

Input status

3/3

USD
USD
USD

Live result

Monthly savings

$300.00

Break-even months

15.00

Scenario compare

Save scenario A, change a few inputs, then save scenario B.

Scenario A

Not saved yet

Scenario B

Not saved yet

Quick check

Change one or two inputs to compare a second scenario before using the number.

Need more detail?

Formula, examples, and FAQ stay tucked away until you need them.

FXFormula ExplanationThe core logic behind the numbers on this page.+

This calculator uses a straightforward formula to calculate the estimated monthly savings and break-even months based on the inputs provided. The formula takes into account the current mortgage balance, interest rate, new interest rate, and other factors. You can adjust the editable assumptions to match your specific situation. The calculator provides an estimate, which should be used for planning purposes only. It's essential to consult with a financial advisor or lender for a more accurate assessment.

USEHow to UseA short path from input to result.+
  1. Enter the requested inputs.
  2. Keep any editable rule or rate fields aligned with your situation.
  3. Review the result and notes before using the estimate.
EXExamplesReference scenarios to sanity-check your inputs.+

Adjust the defaults to match your scenario, then calculate the estimate.

FAQFAQCommon edge cases and quick clarifications.+
What is the break-even point?

The break-even point is the number of months it takes for the savings from refinancing to equal the costs associated with refinancing.

Can I change the assumptions?

Yes, you can adjust the editable rate and rule fields to match your specific situation.

Is this calculator accurate?

This calculator provides an estimate and should be used for planning purposes only. It's essential to consult with a financial advisor or lender for a more accurate assessment.

How do I use this calculator?

Enter the requested inputs, review the result, and adjust the assumptions as needed.

What are the benefits of refinancing?

Refinancing can help you lower your monthly payments, reduce your interest rate, and save money over time.

MAPRelated CalculatorsNeighboring tools in the same decision flow.+