Should I Refinance My Mortgage? How to Calculate the Break-Even Point
Determine if refinancing is worth it by calculating your monthly savings, upfront closing costs, and the exact break-even month.
Refinancing a mortgage is one of the most powerful ways to lower your monthly payments, reduce your loan term, or tap into your home equity. However, refinancing is not free. It is a brand new home loan, which means you must pay closing costs all over again. To decide if refinancing makes financial sense, you need to calculate the exact month where your monthly savings outweigh the upfront fees. This milestone is called the break-even point. This guide explains how to calculate this, matching the math behind our Mortgage Refinance Calculator.
The Break-Even rule: If you plan to sell your home or pay off your loan before you reach your break-even month, refinancing will cost you more than it saves. Only refinance if you plan to stay in the home past the break-even point.
The Refinance Break-Even Formula
Finding your break-even point requires three basic numbers: your current monthly principal and interest payment, your proposed new monthly payment, and the total closing costs of the new loan. Follow these three steps to calculate it:
Step 1: Calculate Your Monthly Savings
Subtract your new proposed monthly payment from your current monthly payment. For example, if your current payment is $1,800 and your new proposed payment is $1,550:
Using our numbers: $1,800 - $1,550 = $250 savings per month.
Step 2: Determine Your Total Closing Costs
Obtain a Loan Estimate from your lender showing the total out-of-pocket costs. These typically run between 2% and 5% of the principal loan amount. For our example, we will assume total closing costs of $6,000.
Step 3: Divide Costs by Savings
Divide the total closing costs by your monthly savings. The result is the number of months it will take to recoup your investment:
Using our example: $6,000 / $250 = 24 months.
In this scenario, it will take exactly two years to break even. Starting in month 25, the $250 monthly savings is pure profit.
Visualizing the Break-Even Point
As shown in the graph above, your net savings start in the negative due to the upfront closing costs. Each month you pay the lower mortgage amount, you recoup a portion of those costs. The point where the two lines intersect is your break-even point. If you sell your house in month 18, you lose money by refinancing; if you stay for 10 years, you save thousands.
Estimating Your Closing Costs
Refinance fees can be paid upfront in cash, or rolled into the new loan balance (which increases your interest charges). Lenders charge several types of fees:
- Application and Origination Fees: Charge by the lender to process the loan, usually 0.5% to 1.5% of the loan value.
- Home Appraisal: An independent assessment of your home's current market value, typically costing $400 to $600.
- Title Search and Title Insurance: Verifies that there are no liens on your property and protects the lender, costing $800 to $2,000.
- Recording and Attorney Fees: Local government charges to register the new deed, costing $200 to $500.
Refinancing Pitfalls: Resetting the Clock
A common trap when refinancing is resetting a 30-year mortgage. If you are 10 years into a 30-year mortgage and refinance into a new 30-year term, you will pay interest for a total of 40 years. Even if your monthly payment is lower, the extra 10 years of interest payments could wipe out your savings. To avoid this, consider refinancing into a 15-year or 20-year term, or make extra principal payments to pay off the new 30-year loan on your original timeline. You can run amortization tables to track this using our Amortization Calculator.
Run Your Numbers Live
Instead of guessing, use our Mortgage Refinance Calculator. It processes your current loan details, new rate estimates, and closing costs, and outputs a complete break-even timeline, total lifetime interest savings, and a side-by-side amortization schedule.