🏠 Mortgages & Real Estate

Mortgage Refinance Calculator 2026 — Should You Refinance Your Home?

Mortgage interest rates fluctuate constantly based on Federal Reserve policy, inflation reports, and macroeconomic bond yields. For homeowners who locked in a mortgage during periods of elevated interest rates, refinancing represents one of the most powerful financial moves available to permanently reduce monthly expenses and save tens of thousands of dollars in lifetime borrowing costs.

However, refinancing is not free. Lenders charge closing costs — typically ranging from 2% to 4% of the remaining loan balance for appraisal fees, title searches, loan origination, and credit reports. To determine if refinancing is genuinely advantageous, you must calculate your break-even point: the exact number of months it takes for your cumulative monthly savings to surpass the upfront closing costs.

Our interactive Mortgage Refinance Calculator compares your current mortgage against multiple new financing scenarios. Whether you want to lower your monthly payment with a 30-year loan, accelerate your debt payoff with a 15-year mortgage, or eliminate private mortgage insurance (PMI), our tool computes your exact monthly savings, break-even horizon, and 5-year net return.

Mortgage Refinance Comparison

Compare your current loan against a new refinance rate and term.

Popular Refinance Strategies

Current Loan Balance ($)

Estimated Closing Costs ($)

Current Mortgage

Current Interest Rate (%)

Remaining Term (Years)

years

Current Payment: $2,439/mo

New Refinanced Mortgage

New Interest Rate (%)

New Term Length (Years)

years

New Payment: $2,043/mo

Roll $4,500 closing costs into new loan balance (New loan: $350,000)

Monthly Impact

Monthly Payment Change

+$396/mo

Lowers payment from $2,439 down to $2,043

5-Year Net Savings

+$19,286

Net savings across 60 months after recovering $4,500 closing fees

Lifetime Net Interest Saved

+$21,145

Total interest difference over entire loan life minus all fees

Current vs. Refinance Loan Comparison

Side-by-side breakdown of monthly payments, total borrowing costs, and cumulative interest.

Category	Current Mortgage	New Refinance Loan	Net Difference
Interest Rate	7%	5.75%	1.250% lower
Remaining Term	26 years	30 years	4 years
Monthly P&I Payment	$2,439	$2,043	Save $396/mo
Total Remaining Interest	$410,947	$385,302	$25,645 interest saved
Total Payments Remaining	$760,947	$735,302	Save $21,145

Related Calculators for Better Decisions

Buying a home? Calculate your exact monthly payment with taxes & PMI Saving for a house? See how much down payment you actually need Want to see compound interest in action? Project your returns Have a target in mind? See how much to save every month

Behind this is dedication and a desire to help

ClaruSite is 100% free and independent. Your support helps keep these financial tools fast, accurate, and available to everyone.

Donate with PayPal

💡

Found an error or have a suggestion?

Help us improve this calculator for everyone.

chat_bubbleSend Feedback

exploreReal-World Scenarios

When to Use This Calculator

Everyday financial situations where this tool gives you fast, accurate clarity:

📉

Lower Your Monthly Payment

Lock in a lower interest rate to reduce monthly housing expenses and immediately increase monthly household cash flow.

⏱️

Calculate Your Break-Even Date

Find out the exact month when your accumulated payment savings exceed the lender closing fees.

🚀

Shorten Your Mortgage Term

Switch from a 30-year to a 15-year or 20-year term to eliminate debt a decade sooner and save hundreds of thousands in interest.

💵

Evaluate No-Closing-Cost Refinancing

Compare rolling closing fees into your new loan balance versus paying them upfront out of pocket.

lightbulbFormula & Worked Example

How It Works

Our refinance evaluation model compares amortization trajectories across two distinct loans under standard US banking conventions:

Monthly Payment Calculation (Principal & Interest):

Monthly Payment = Balance × [ r × (1 + r)^n ] / [ (1 + r)^n − 1 ]
Where:
- r = Periodic monthly interest rate (Annual Rate / 12 / 100)
- n = Total remaining term in months (Years × 12)

Monthly Cash Flow Savings:

Monthly Savings = Current Monthly Payment − New Monthly Payment

Break-Even Period (Months):

Break-Even Horizon = Closing Costs / Monthly Savings
If you move or refinance again before reaching this month, you take a net loss on the transaction.

5-Year Cumulative Net Savings:

5-Year Net Benefit = (Monthly Savings × 60) − Closing Costs

Total Lifetime Interest Comparison:

Lifetime Net Savings = Total Current Remaining Interest − (Total New Interest + Out-of-Pocket Closing Costs)

Step-by-Step Example

Consider a homeowner with a $350,000 remaining mortgage balance at a 7.00% interest rate and 26 years remaining:

- Current Baseline: The monthly principal and interest payment is $2,429. Over the remaining 26 years, total remaining interest equals $407,850.

- Refinancing to 5.75% for 30 Years ($4,500 Closing Costs):
New monthly payment drops to $2,042, generating an immediate cash savings of $387 per month.
- Break-Even Point: $4,500 / $387 = 11.6 months (~1 year). After just 12 months, the closing costs are fully recovered!
- 5-Year Net Savings: ($387 × 60) − $4,500 = $18,720 in net pocket savings.
- Lifetime Interest Savings: $22,780 saved across the full loan horizon.

- Refinancing to 5.25% for 15 Years:
Monthly payment increases by $384/mo to $2,813, but the homeowner pays off the mortgage 11 years earlier and saves over $251,000 in lifetime interest!

Frequently Asked Questions

How much should mortgage interest rates drop to make refinancing worth it?expand_more

A standard rule of thumb is that refinancing is worth considering if you can lower your interest rate by 0.75% to 1.00% (75 to 100 basis points). However, even a 0.50% reduction can yield substantial savings on larger loan balances (e.g., $400,000+), provided you plan to stay in the home long enough to pass the break-even point.

What is a mortgage refinance break-even point and how is it calculated?expand_more

The break-even point is the length of time required for your monthly payment savings to equal the closing costs of the new loan. It is calculated by dividing total closing costs by monthly savings: Break-Even Months = Closing Costs / Monthly Payment Savings. For instance, if closing costs are $4,000 and you save $200 per month, your break-even point is exactly 20 months.

How much are closing costs when refinancing a mortgage in the US?expand_more

Refinance closing costs typically range between 2% and 4% of the loan amount. On a $300,000 mortgage, closing costs usually average between $6,000 and $12,000. These fees include lender origination charges, home appraisal ($400–$700), title insurance search, recording fees, and prepaid escrow accounts.

What is a "no-closing-cost" mortgage refinance?expand_more

A "no-closing-cost" refinance does not mean the lender waives their fees. Instead, the lender either rolls the closing costs directly into your new loan principal balance (increasing what you owe) or charges a slightly higher interest rate (e.g., 0.25% higher) in exchange for covering your upfront closing expenses via lender credits.

Can refinancing restart my 30-year mortgage clock and cost me more in the long run?expand_more

Yes. If you have already paid off 7 years of a 30-year mortgage and you refinance into a brand-new 30-year loan, you extend your overall repayment period to 37 years. While your monthly payment will decrease, you may end up paying more total interest over time. To avoid this, consider refinancing into a term that matches your remaining timeline, such as a 20-year or 15-year fixed mortgage.

Can refinancing eliminate Private Mortgage Insurance (PMI)?expand_more

Yes. If your home has appreciated in value or you have paid down your balance such that your current equity is at least 20% (Loan-to-Value ratio 80% or less), refinancing into a new conventional mortgage eliminates PMI completely, saving you an extra $100 to $300 per month in insurance premiums.

Related tools to help with your financial decisions.

Mortgages & Real Estate