When does it make sense to refinance my mortgage?

Refinancing makes sense when new interest rates are 0.5-1% lower than your current rate, and you plan to stay in the home long enough to recover closing costs through monthly savings. Consider refinancing if your credit score has improved since you got your original mortgage, or if you want to switch from an adjustable-rate mortgage (ARM) to a fixed-rate mortgage for payment stability.

What is the break-even point and why does it matter?

The break-even point is when your monthly payment savings equal the upfront closing costs you paid for the refinance. For example, if closing costs are $3,000 and you save $150 per month, your break-even point is 20 months. You should only refinance if you plan to stay in the home past your break-even date, otherwise you won't recover the closing costs.

What costs are involved in refinancing a mortgage?

Typical refinance closing costs range from 2-5% of the loan amount and include origination fees, appraisal fees, credit checks, title insurance, underwriting, and legal fees. Some lenders offer "no-cost" or "low-cost" refinances, but these often come with a higher interest rate. Always compare the true cost of refinancing versus your monthly and lifetime savings.

Can I refinance to a shorter loan term?

Yes, refinancing from a 30-year to a 15-year mortgage is common. While your monthly payment will increase, you will pay far less in total interest. For example, refinancing $250,000 from 7% (30-year) to 5.5% (15-year) raises your payment from $1,663 to $2,043 but saves over $200,000 in total interest.

How many times can I refinance my mortgage?

There is no legal limit on how many times you can refinance, but each refinance involves closing costs (typically $3,000-$10,000). Most lenders require a waiting period of 6-12 months between refinances. Only refinance when the savings clearly outweigh the costs and you plan to stay long enough to pass the break-even point.

Mortgage Refinance Calculator

Compare your current mortgage with a refinanced loan. Enter your current remaining balance, interest rate, and loan term, then specify the new rate and term to see your monthly savings, break-even point, and lifetime savings after closing costs.

By InstaCalcs Team·Reviewed April 25, 2026·Report an issue

Current Mortgage

Remaining Balance ($)

How much you still owe

Current Interest Rate (%)

Your current APR

Remaining Term (months)

Months left on current loan

New Mortgage

New Interest Rate (%)

New APR for refinanced loan

New Loan Term

Duration of new loan

Closing Costs ($)

Fees and origination costs

Monthly Savings

$172.92

per month with new mortgage

Lifetime Savings Breakdown

Total Savings (11.4%)

Closing Costs (4.6%)

Current Monthly Payment

$1,520.06

Your current mortgage payment

New Monthly Payment

$1,347.13

Estimated refinanced payment

Break-Even Point

18 months

When you recover closing costs

Net Lifetime Savings

$59,251.87

Total savings after closing costs

Total Cost Comparison

Current Loan$547,220.13

100%

Refinanced Loan$487,968.26

89%

Monthly Savings

$172.92

Total Savings

$59,251.87

Cost Breakdown Details

Current Mortgage

$547,220.13

Principal: $300,000.00 + Interest: $247,220.13

New Mortgage

$487,968.26

Principal: $300,000.00 + Interest: $184,968.26 + Closing: $3,000.00

Note: This calculator provides estimates based on standard amortization. Actual refinance savings may vary based on credit score, current market conditions, appraisal requirements, and lender-specific fees.

Break-Even Point: This is when your monthly savings equals the closing costs paid upfront.

How to use

Enter your current mortgage details: remaining balance, current interest rate, and how many months you have left. Then enter the new interest rate you qualify for, choose your desired new loan term (10, 15, 20, or 30 years), and estimate your closing costs. The calculator shows your monthly savings, when you'll break even, and your total lifetime savings after refinancing.

Formula

M = P × [r(1+r)^n] / [(1+r)^n - 1]

Where M is the monthly payment, P is the loan principal (remaining balance), r is the monthly interest rate (APR/12), and n is the number of monthly payments. The calculator applies this formula to both your current mortgage and refinanced loan, then compares total costs to determine savings. Break-even point is calculated as: Closing Costs ÷ Monthly Savings = Break-even Months.

When this calculator helps

Refinancing can look great when you only compare the monthly payments. Closing costs are the catch. This calculator shows how long it takes for the monthly savings to cover those costs, plus what the refinance could save over the life of the loan. It helps most when rates have dropped, your credit has improved, or you are thinking about switching from an adjustable-rate loan to a fixed-rate mortgage.

Examples

Example 1: Rate Drop Refinance

A homeowner has $280,000 remaining on a 30-year mortgage at 7.5% with 25 years left ($2,027/month). Refinancing to 6.0% for a new 25-year term drops the payment to $1,804, saving $223/month. With $5,000 in closing costs, the break-even point is just 22 months, and lifetime savings exceed $61,900.

Example 2: Shortening the Term

With $200,000 remaining at 6.5% on a 30-year loan, a homeowner refinances to a 15-year mortgage at 5.5%. The monthly payment rises from $1,264 to $1,634, but total interest drops from $178,320 to $94,120. Despite paying $370 more monthly, the homeowner saves $84,200 and is mortgage-free 15 years sooner.

Example 3: ARM to Fixed-Rate Switch

A borrower with a $350,000 adjustable-rate mortgage currently at 5.5% is worried about rising rates. Refinancing to a fixed 6.25% for 30 years increases the payment from $1,987 to $2,155. It costs more now, but it locks in the rate. If the ARM later adjusts to 8% or higher, the fixed-rate loan may save hundreds per month.

Things to watch

•Only refinance if you plan to stay in the home past your break-even point, otherwise, you will lose money on closing costs.
•Resetting to a new 30-year term lowers payments but may increase total interest paid, consider a shorter term to maximize savings.
•Shop multiple lenders and compare the annual percentage rate (APR), not just the interest rate, since APR includes fees and closing costs.
•Cash-out refinances let you borrow against your equity but increase your loan balance, only use this for high-value purposes like home improvements.
•Check your credit score before applying. A score above 740 typically qualifies for the best refinance rates, potentially saving 0.5-1% compared to lower scores.

Sources and methodology

Last reviewed: April 25, 2026. We review formulas, default assumptions, and examples against public references when a formal source applies.

Method: This calculator uses the formula explained on this page, then checks default assumptions and examples against the references listed below.

•How lenders calculate monthly mortgage payments, Consumer Financial Protection Bureau
•Principal and interest versus total monthly payment, Consumer Financial Protection Bureau

Found something off? Send a correction with the page URL, inputs, result, and expected result.

Common questions

When does it make sense to refinance my mortgage?: Refinancing makes sense when new interest rates are 0.5-1% lower than your current rate, and you plan to stay in the home long enough to recover closing costs through monthly savings. Consider refinancing if your credit score has improved since you got your original mortgage, or if you want to switch from an adjustable-rate mortgage (ARM) to a fixed-rate mortgage for payment stability.
What is the break-even point and why does it matter?: The break-even point is when your monthly payment savings equal the upfront closing costs you paid for the refinance. For example, if closing costs are $3,000 and you save $150 per month, your break-even point is 20 months. You should only refinance if you plan to stay in the home past your break-even date, otherwise you won't recover the closing costs.
What costs are involved in refinancing a mortgage?: Typical refinance closing costs range from 2-5% of the loan amount and include origination fees, appraisal fees, credit checks, title insurance, underwriting, and legal fees. Some lenders offer "no-cost" or "low-cost" refinances, but these often come with a higher interest rate. Always compare the true cost of refinancing versus your monthly and lifetime savings.
Can I refinance to a shorter loan term?: Yes, refinancing from a 30-year to a 15-year mortgage is common. While your monthly payment will increase, you will pay far less in total interest. For example, refinancing $250,000 from 7% (30-year) to 5.5% (15-year) raises your payment from $1,663 to $2,043 but saves over $200,000 in total interest.
How many times can I refinance my mortgage?: There is no legal limit on how many times you can refinance, but each refinance involves closing costs (typically $3,000-$10,000). Most lenders require a waiting period of 6-12 months between refinances. Only refinance when the savings clearly outweigh the costs and you plan to stay long enough to pass the break-even point.