Refinance Calculator: Estimate Your New Mortgage Payment

Use the refinance calculator above to see how a new loan could change your monthly payment. Enter your current mortgage details, a new interest rate, and your desired loan term. The calculator estimates your new monthly payment, total interest costs, and potential payment savings.

Refinancing replaces your existing mortgage with a new loan, ideally on better terms. Whether you want a lower interest rate, a shorter loan term, or access to your home equity, this mortgage refinance calculator helps you compare scenarios before you talk to a lender.

Results are estimates based on the numbers you enter. They do not include property taxes, homeowners insurance, or HOA dues unless you add those manually.

Reason to Refinance Your Mortgage

People refinance for different reasons. The right one depends on your financial goals, how long you plan to stay in your home, and current mortgage rates.

Lower Interest Rate and Refinance Interest Savings

The most common reason to refinance your mortgage is to lock in a lower interest rate. Even a small rate drop can reduce your monthly payment and save thousands over the life of the loan.

A rule of thumb some borrowers use: refinancing may be worth exploring if you can reduce your rate by at least 0.5% to 1%. But the real test is whether total interest savings exceed your closing costs within the time you plan to keep the home. The calculator above helps you run that comparison quickly.

For example, dropping from 7% to 6% on a 30-year, $300,000 loan could save roughly $200 per month. Over the full term, that adds up to significant refinance interest savings.

Cash-Out Refinance and Home Equity Options

A cash-out refinance lets you borrow more than your current loan balance and receive the difference in cash. You tap equity in your home to fund things like:

Home improvements
Debt consolidation
Education expenses
Large planned purchases

You will owe a larger loan amount afterward, so your monthly payment may increase even if the interest rate stays the same or drops slightly. The calculator can model this by entering the higher new loan amount.

Shortening or Extending Your Loan Term

Switching from a 30-year to a 15-year mortgage typically means a higher monthly payment but far less total interest. If your budget can handle the increase, a shorter term builds equity faster.

Going the other direction (extending your loan term) lowers the monthly payment but increases total interest paid. This trade-off makes sense for some borrowers who need immediate cash-flow relief.

How the Mortgage Refinance Calculator Works

The calculator compares your existing mortgage against a proposed refinance loan. It needs a few inputs from each side.

Current Mortgage and Existing Loan Details

Enter these details about your current home loan:

Remaining loan balance. Check your most recent mortgage statement for the principal balance.
Current interest rate. The rate on your existing mortgage, not today's market rate.
Remaining loan term. How many months or years are left on your original mortgage.
Current monthly payment. Your principal and interest payment (exclude taxes and insurance if prompted).

These numbers set the baseline the calculator uses to measure savings.

Refinance Rates and Mortgage Rates Inputs

For the new loan side, you will enter:

New interest rate. Use a rate quote from a lender or a current market average as a starting point.
New loan term. Common choices are 15-year and 30-year, but other terms are available.
New loan amount. This equals your remaining balance for a standard refinance. For a cash-out refinance, add the cash you want to receive.
Closing costs. Enter estimated fees so the calculator factors them into your break-even timeline.

Adjust these inputs to compare multiple scenarios. Try different refinance rates and loan terms to see how each one affects your estimated monthly payment and total cost.

Cost to Refinance: Closing Costs, Fees, and Mortgage Insurance

Refinancing is not free. Typical closing costs run 2% to 5% of the new loan amount. On a $300,000 refinance, expect roughly $6,000 to $15,000 in fees.

Common costs include:

Loan origination fee
Appraisal fee
Title search and title insurance
Recording fees
Credit report fee
Prepaid interest (per diem charges)

Mortgage insurance may apply if your loan-to-value ratio exceeds 80%. Conventional loans require private mortgage insurance (PMI) in that case. FHA loans carry a mortgage insurance premium regardless of equity.

Some lenders offer a no-closing-cost refinance. The trade-off is a slightly higher interest rate. The calculator can help you compare a lower rate with upfront fees against a higher rate with no fees.

The break-even point is the number of months it takes for your monthly savings to recoup closing costs. If you plan to move before reaching that point, refinancing may not save you money.

Refinancing a Mortgage with a Lender: What Borrowers Need to Know

A refinance calculator gives you estimates. The lender determines your actual rate, fees, and approval.

Credit Score, Loan-to-Value, and Lender Requirements

Lenders evaluate several factors when you apply:

Credit score. Higher scores generally qualify for lower refinance rates. Most conventional lenders look for a score of 620 or above. FHA programs may accept lower scores.
Loan-to-value ratio (LTV). This is your loan balance divided by the current value of your home. Lower LTV means more equity, which reduces lender risk and can improve your rate.
Debt-to-income ratio (DTI). Lenders compare your total monthly debt payments to your gross income. A DTI below 43% is a common threshold.
Employment and income verification. Expect to provide pay stubs, tax returns, and bank statements.

Having strong numbers in each category gives you more negotiating power and access to better mortgage rates.

Fixed-Rate vs. Adjustable-Rate Mortgage Options

When you refinance, you choose between two main mortgage options:

Fixed-rate mortgage. Your interest rate stays the same for the entire loan term. Predictable payments make budgeting straightforward. Most borrowers who refinance choose a fixed-rate loan.
Adjustable-rate mortgage (ARM). The rate is fixed for an initial period (commonly 5, 7, or 10 years), then adjusts periodically based on a market index. ARMs often start with a lower rate than fixed loans, but payments can increase later.

If you plan to stay in the home long term, a fixed-rate mortgage offers certainty. If you expect to sell or refinance again within a few years, an ARM's lower initial rate might save more.

Refinance Options Beyond a Standard Mortgage Refinancing

Not every refinance follows the same path. Several programs serve specific situations.

Cash-Out Refinance vs. Home Equity Loan

Both let you tap home equity, but they work differently:

Feature	Cash-out refinance	Home equity loan
Replaces existing mortgage?	Yes	No (second lien)
Number of payments	One	Two (original mortgage + equity loan)
Interest rate	Typically first-mortgage rate	Often slightly higher
Closing costs	Full refinance closing costs	Generally lower
Best for	Large lump-sum needs when you also want a better rate	Smaller amounts when your current mortgage rate is already low

A cash-out refinance makes more sense when current refinance rates are lower than your existing rate. A home equity loan may be better if your original mortgage already has a favorable rate you do not want to give up.

FHA Streamline and Other Refinance Programs

Several government and specialty programs simplify the process for eligible borrowers:

FHA Streamline Refinance. Available to borrowers with an existing FHA loan. Reduced documentation, no appraisal required in many cases, and lower fees. The goal is a lower payment or a more stable loan type.
VA Interest Rate Reduction Refinance Loan (IRRRL). For veterans with an existing VA loan. Minimal paperwork and no appraisal requirement.
USDA Streamline Refinance. For borrowers with a current USDA rural housing loan.
HARP replacement programs. Some lenders offer high-LTV refinance options for borrowers with little equity who are current on payments.

Each program has specific eligibility rules. Check with your mortgage lender or servicer to see which refinance options you qualify for.

Mortgage Calculator vs. Refinance Calculator

A standard mortgage calculator estimates payments for buying a home. You enter a purchase price, down payment, interest rate, and loan term.

A refinance calculator starts from a different place. It accounts for your existing mortgage balance, compares old and new loan terms, factors in closing costs, and calculates a break-even timeline. The output focuses on whether switching loans actually saves you money.

Use a mortgage calculator when you are purchasing a home. Use this refinance calculator when you already have a loan and want to evaluate replacing it.

When Mortgage Refinancing May Not Save You Money

Refinancing is not always the right move. Consider skipping it if:

You are close to paying off your existing mortgage. Restarting a 30-year term means more total interest, even at a lower rate.
You plan to move soon. If you sell before reaching the break-even point, closing costs eat up any savings.
The rate difference is minimal. A 0.25% drop may not justify thousands in fees.
Your credit score has dropped. A lower score means a higher rate, which could eliminate potential savings.
You would add significant cash-out debt. Borrowing heavily against your home increases risk if property values decline.
Prepayment penalties apply. Some older loans charge a fee for paying off early. Factor that into the calculation.

Run the numbers in the refinance calculator first. Pay attention to the break-even point and total interest over the life of the loan, not just the new monthly payment.