Does this calculator include taxes, insurance, or HOA dues?

No. It focuses on principal and interest only. To estimate your full monthly housing payment, you’ll need to add property taxes, homeowner’s insurance, mortgage insurance (if applicable), and HOA dues separately.

Can I model extra principal payments with this calculator?

This tool shows the baseline payment for a standard amortizing mortgage. To see how extra payments change payoff time and interest, use an amortization or payoff calculator that supports additional principal payments.

Does this work for adjustable‑rate mortgages (ARMs)?

It assumes a fixed interest rate for the full term. You can use an ARM’s initial rate as an approximation, but actual payments may change when the rate resets according to your loan’s terms.

How do points and lender credits affect the calculation?

Points and lender credits effectively change your APR. If you are considering paying points or taking credits, adjust the interest rate input to reflect the APR for each option and compare the resulting payments and total interest.

Is this enough to decide how much house I can afford?

It is a helpful starting point for estimating principal and interest, but it does not account for taxes, insurance, other debts, or your broader budget. Use it alongside affordability and debt‑to‑income calculators or a full financial plan when deciding how much to borrow.

finance calculator

Mortgage Payment Calculator

Estimate your monthly mortgage payment, total interest, and payoff schedule with one input-driven tool.

Results

Estimated monthly payment: $2,212 USD
Total interest paid: $446,406 USD
Total paid over loan: $796,406 USD

Overview

When you shop for a mortgage, the monthly payment is usually the first number you care about—but the total interest you pay over the life of the loan can easily add up to six figures. This mortgage payment calculator lets you plug in a loan amount, interest rate, and term to see both sides of the story: what your payment looks like today and how much interest you may pay over time.

Use it to compare 15‑year vs 30‑year terms, test how rate changes affect your budget, and get a quick sense of whether a quote fits comfortably within your monthly cash flow before you talk with lenders or make offers.

How to use this calculator

Enter the loan amount you plan to borrow after your down payment (for example, $350,000).
Enter the annual interest rate (APR) you have been quoted or want to test, and the term in years (commonly 15, 20, or 30).
Review the estimated monthly payment, total interest paid, and total paid over the life of the loan.
Adjust the rate and term to compare different scenarios—for example, a shorter term with a higher payment but lower lifetime interest, or a longer term with easier monthly cash flow.

Inputs explained

Loan amount: The principal you expect to borrow, typically the purchase price minus your down payment and any closing costs you roll into the loan. This does not include taxes, insurance, or other ongoing housing costs.
Interest rate (APR): The annual percentage rate for your mortgage. APR reflects the interest rate plus certain finance charges; the calculator uses this as an annual rate and converts it to a monthly rate for amortization.
Term length (years): The number of years over which you agree to repay the loan in equal monthly installments. Common fixed‑rate terms are 15 and 30 years, but some lenders offer other options such as 10 or 20 years.

How it works

Mortgage payments for a standard fixed‑rate loan are based on an amortization formula that spreads repayment of principal and interest evenly over the term.

The calculator converts your annual interest rate (APR) into a monthly rate by dividing by 12 and converts your term in years into a total number of monthly payments.

It then applies the standard formula: Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1], where P is the loan amount (principal), r is the monthly interest rate, and n is the total number of payments.

Once the monthly payment is known, total paid over the life of the loan is simply Monthly payment × n, and total interest is Total paid − Principal.

The tool returns all three figures so you can see how much of your payment goes toward interest versus principal over the full term, even though it does not show a detailed month‑by‑month amortization schedule.

Formula

Monthly rate = APR ÷ 12
Total payments (n) = Term (years) × 12
Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
Total paid = Monthly payment × n
Total interest = Total paid − P

When to use it

Comparing 15‑year vs 30‑year mortgage options to see how much monthly payment and lifetime interest differ between the two.
Testing how a higher or lower interest rate—such as a rate lock or a change in market conditions—would impact your monthly budget.
Estimating how much house you can afford by working backward from a target payment and adjusting the loan amount until the estimate fits your comfort zone.
Sanity‑checking lender quotes for principal and interest (P&I) payments before considering taxes, insurance, and other housing costs.

Tips & cautions

Remember that this calculator covers principal and interest only. To estimate your full housing payment (PITI), you will need to add property taxes, homeowner’s insurance, HOA dues, and any mortgage insurance separately.
If you plan to make extra principal payments, consider pairing this tool with a mortgage payoff or extra payment calculator to see how much you could reduce your payoff time and total interest.
Rates are often tied to points, credits, and your credit profile. Use this calculator to compare a few APR scenarios and then discuss the trade‑offs with your lender.
Does not include PMI, property taxes, homeowner’s insurance, HOA fees, or other charges—these can significantly change your total monthly housing cost.
Assumes a fixed‑rate, fully amortizing mortgage with equal monthly payments and no balloon payment or interest‑only period.
Does not model adjustable‑rate mortgages (ARMs), interest‑only loans, payment changes over time, or prepayment penalties.

Worked examples

$350,000 loan at 6.5% for 30 years

Monthly rate = 0.065 ÷ 12 ≈ 0.005416.
Total payments = 30 × 12 = 360.
Monthly payment is calculated using the amortization formula and comes out to roughly the low‑$2,200 range.
Total paid over 30 years is Monthly payment × 360, and total interest is that amount minus $350,000.

$250,000 loan at 5.0% for 15 years

Monthly rate = 0.05 ÷ 12 ≈ 0.004167.
Total payments = 15 × 12 = 180.
Monthly payment is higher than a 30‑year option, but total interest paid is much lower because you pay the loan off in half the time.
Comparing this scenario to a 30‑year 5% loan highlights the trade‑off between monthly cash‑flow comfort and lifetime cost.

Deep dive

This mortgage payment calculator uses the standard amortization formula to estimate your monthly principal‑and‑interest payment, total interest paid, and total amount paid over the life of the loan. Enter your loan amount, APR, and term to see how different mortgage scenarios affect your budget and long‑term cost.

Because it focuses on principal and interest, the tool is ideal for quickly comparing fixed‑rate mortgage options before you layer in taxes, insurance, HOA dues, or mortgage insurance. You can run multiple scenarios in seconds to understand how rate changes or term length trade monthly affordability for lifetime interest savings.

Use the calculator alongside affordability, refinance, or extra‑payment tools to build a more complete picture of your housing plan and to prepare for conversations with lenders and real‑estate professionals.

FAQs

Does this calculator include taxes, insurance, or HOA dues?: No. It focuses on principal and interest only. To estimate your full monthly housing payment, you’ll need to add property taxes, homeowner’s insurance, mortgage insurance (if applicable), and HOA dues separately.
Can I model extra principal payments with this calculator?: This tool shows the baseline payment for a standard amortizing mortgage. To see how extra payments change payoff time and interest, use an amortization or payoff calculator that supports additional principal payments.
Does this work for adjustable‑rate mortgages (ARMs)?: It assumes a fixed interest rate for the full term. You can use an ARM’s initial rate as an approximation, but actual payments may change when the rate resets according to your loan’s terms.
How do points and lender credits affect the calculation?: Points and lender credits effectively change your APR. If you are considering paying points or taking credits, adjust the interest rate input to reflect the APR for each option and compare the resulting payments and total interest.
Is this enough to decide how much house I can afford?: It is a helpful starting point for estimating principal and interest, but it does not account for taxes, insurance, other debts, or your broader budget. Use it alongside affordability and debt‑to‑income calculators or a full financial plan when deciding how much to borrow.

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This mortgage payment calculator provides simplified principal‑and‑interest estimates using user‑entered assumptions. It does not include all costs of homeownership, does not model all mortgage types, and is not a substitute for lender disclosures or professional financial advice. Always confirm terms, payments, and total costs with your lender before making borrowing or homebuying decisions.