Mortgage Payment Calculator - Free Online Tool

Calculate Your Monthly Mortgage Payment in Seconds

Buying a home is the largest financial commitment most people ever make, and understanding exactly what your monthly mortgage payment will be is the first step toward making a smart decision. Whether you’re a first-time buyer browsing listings on Zillow, a homeowner considering refinancing at today’s rates, or an investor running numbers on a rental property, knowing your payment breakdown — principal, interest, taxes, and insurance — gives you the clarity to negotiate confidently and budget accurately.

This mortgage payment calculator does more than just spit out a number. Enter your home price, down payment, loan term, and interest rate, and you’ll see a complete amortization breakdown showing how much of each payment goes toward principal versus interest over the life of your loan. You can also factor in property tax and homeowner’s insurance to get a realistic total monthly obligation — the number that actually hits your bank account.

Most online calculators hide the math or oversimplify. This one shows you everything: total interest paid over the loan’s lifetime, the payoff date, and a visual breakdown of your payment components. If you’re comparing a 15-year mortgage against a 30-year, or weighing a 6.5% rate against a 7.0% rate, you can run scenarios side by side in under a minute. No sign-ups, no ads, no data collection — just accurate math you can trust.

How to Use the Mortgage Payment Calculator

Step 1: Enter the Home Price

Type the full purchase price of the property. This is the listing price or your agreed-upon offer amount. For example, if you’re looking at a three-bedroom home listed at $350,000, enter that figure. The calculator accepts numbers with or without commas.

Step 2: Set Your Down Payment

Enter the dollar amount you plan to pay upfront. The calculator automatically shows your down payment percentage below the field. A conventional loan typically requires at least 3% to 5% down, while putting 20% down lets you avoid private mortgage insurance (PMI). On a $350,000 home, that’s $17,500 at 5% or $70,000 at 20%. Adjust this number to see how different down payment amounts affect your monthly payment.

Step 3: Input the Interest Rate

Enter the annual fixed interest rate as a percentage. As of early 2026, average 30-year fixed rates hover around 6.5% to 7.0%, though your actual rate depends on your credit score, debt-to-income ratio, and lender. You can find personalized rate estimates from your bank or mortgage broker. Even a 0.25% difference can save or cost tens of thousands of dollars over the life of a loan.

Step 4: Choose the Loan Term

Select from the dropdown: 30, 20, 15, or 10 years. A 30-year term gives you the lowest monthly payment but the highest total interest. A 15-year term has higher payments but dramatically less interest. For a $280,000 loan at 6.75%, the 30-year payment is about $1,816 per month, while the 15-year payment jumps to $2,477 — but you save over $166,000 in interest.

Step 5: Add Property Tax and Insurance

Enter your estimated annual property tax and homeowner’s insurance. Property tax rates vary widely — from about 0.3% of home value in Hawaii to over 2% in New Jersey. Insurance costs depend on location, coverage level, and the home’s age. If you’re unsure, check your county assessor’s website for tax estimates and get insurance quotes from at least three providers. These aren’t optional costs — your lender requires both, and they’re typically collected as part of your monthly escrow payment.

Step 6: Read Your Results

Click “Calculate My Payment” and review the output. The hero number at the top is your total monthly obligation. The horizontal bars below show how that payment breaks down across principal, interest, taxes, and insurance. The loan summary card shows your total interest over the full term and your projected payoff date. Scroll down to the amortization table to see exactly how your balance decreases year by year — or toggle to monthly view for granular detail.

Example Calculation

Suppose you’re buying a $400,000 home with $80,000 down (20%), a 6.5% rate on a 30-year loan, $5,000 annual property tax, and $1,800 annual insurance. Your loan amount is $320,000. The monthly principal and interest payment works out to $2,022.81. Add $416.67 for property tax and $150.00 for insurance, and your total monthly payment is $2,589.48. Over 30 years, you’ll pay $408,211 in interest alone — nearly as much as the home itself.

The Formula Behind Mortgage Payments

The monthly payment for a fixed-rate mortgage is calculated using the standard amortization formula:

M = P × [r(1+r)ⁿ] / [(1+r)ⁿ − 1]

Where each variable represents:

• M = Monthly principal and interest payment
• P = Loan principal (home price minus down payment)
• r = Monthly interest rate (annual rate divided by 12)
• n = Total number of monthly payments (loan term in years multiplied by 12)

For a $280,000 loan at 6.75% over 30 years: r = 0.0675/12 = 0.005625 and n = 360. Plugging in: M = 280,000 × [0.005625 × (1.005625)³⁶⁰] / [(1.005625)³⁶⁰ − 1] = $1,816.36 per month.

This formula ensures each payment covers the interest accrued that month plus a portion of the principal. In the early years, most of your payment goes to interest. By year 20 of a 30-year mortgage, the split has flipped — the majority goes toward reducing your balance. This is why making extra principal payments early in the loan term has such a powerful compounding effect on interest savings.

Property tax and insurance are simply added as flat monthly amounts (annual cost divided by 12). They don’t compound or amortize — they’re collected into an escrow account and paid to the county and insurer on your behalf.

The formula assumes a fixed interest rate. For adjustable-rate mortgages (ARMs), the calculation resets at each adjustment period based on the new rate and remaining balance. This calculator focuses on fixed-rate loans, which account for roughly 90% of new mortgage originations in the U.S.

What Affects Your Mortgage Payment the Most?

Interest Rate: The Biggest Lever

On a $300,000 loan over 30 years, the difference between 6.0% and 7.0% is $199 per month — or $71,640 over the life of the loan. Your credit score is the single largest factor in the rate you qualify for. A score above 760 typically gets you the best available rates. Between 700 and 759, you’ll pay slightly more. Below 680, expect rates 0.5% to 1.5% higher than advertised “best” rates.

Loan Term: Monthly Payment vs. Total Cost

Choosing a 15-year mortgage over a 30-year typically saves 40% to 50% on total interest. The monthly payment is higher — roughly 40% to 50% more — but the interest rate is usually 0.5% to 0.75% lower. If your budget can handle the higher payment, the 15-year option builds equity faster and frees you from debt sooner.

Down Payment: More Than Just a Lower Balance

A larger down payment doesn’t just reduce your loan amount — it can eliminate PMI (saving $100 to $300 per month on a typical loan), get you a better interest rate, and make your offer more competitive in a tight market. Even going from 10% to 15% down can noticeably improve your rate and monthly payment.

Property Taxes: The Hidden Variable

Annual property taxes can range from $1,500 in low-tax states to over $10,000 in places like New Jersey, Connecticut, or Illinois. A $10,000 annual tax adds $833 per month to your housing cost. Always research the actual tax rate and assessed value for any specific property — not just the statewide average.

Frequently Asked Questions

How much house can I afford on my salary?

The standard guideline is the 28/36 rule: your mortgage payment (including taxes and insurance) should not exceed 28% of your gross monthly income, and your total debt payments should stay below 36%. On a $75,000 salary, that means your total monthly housing cost should stay around $1,750 or less. However, this is a guideline — lenders may approve you for more, and what’s comfortable depends on your other expenses, savings goals, and lifestyle. Use this calculator to test different price points until you find a payment that fits within your actual monthly budget after accounting for all other obligations.

Should I choose a 15-year or 30-year mortgage?

It depends on your financial priorities. A 30-year mortgage keeps your monthly payment lower, freeing up cash for investing, emergency savings, or other goals. A 15-year mortgage costs significantly more per month but saves a substantial amount in total interest — often $100,000 or more on a typical loan. If you’re already maxing out your retirement accounts and have a solid emergency fund, the 15-year option accelerates your path to owning your home outright. If cash flow flexibility matters more — for instance, if you’re self-employed or have variable income — the 30-year gives you more breathing room. You can always make extra payments on a 30-year loan to pay it off faster without committing to the higher required payment.

What is PMI and when can I remove it?

Private Mortgage Insurance (PMI) is required on conventional loans when your down payment is less than 20% of the home’s value. It typically costs between 0.5% and 1.5% of the loan amount per year — so on a $300,000 loan, expect $1,500 to $4,500 annually, or $125 to $375 per month added to your payment. Under federal law, your lender must automatically cancel PMI when your loan balance reaches 78% of the original home value. You can also request removal at 80% loan-to-value. Some borrowers reach this threshold faster by making extra principal payments or through home value appreciation — you may need a new appraisal to prove the latter.

How do extra payments affect my mortgage?

Extra payments go directly toward principal, reducing your balance faster and cutting the total interest you pay. Adding just $200 per month to a $280,000 loan at 6.75% over 30 years saves approximately $78,000 in interest and pays off the mortgage about 6 years early. The impact is strongest when you make extra payments early in the loan term, because that’s when the most interest accrues. Some homeowners round up their payments (e.g., paying $1,900 instead of $1,816) or make one extra full payment per year by paying biweekly instead of monthly. Check that your lender applies extra payments to principal, not future payments.

Does the calculator include PMI, HOA fees, or closing costs?

This calculator covers principal, interest, property tax, and homeowner’s insurance — the four main components of a monthly mortgage payment. It does not include PMI (which applies if your down payment is under 20%), HOA dues (which vary by community, typically $200 to $500 per month), or closing costs (which are one-time fees at purchase, usually 2% to 5% of the loan amount). For a complete picture of your housing costs, add your estimated PMI and HOA fees to the total monthly payment shown by this calculator.

Related Resources

• Refinance Savings Calculator — Find out if refinancing at a lower rate makes financial sense for your situation.
• Home Affordability Guide — Step-by-step process to determine how much home you can realistically afford.
• Down Payment Savings Calculator — Calculate how long it will take to save for your target down payment.
• Property Tax Guide by State — Compare property tax rates across all 50 states to factor location into your decision.