Mortgage Calculator

First-time home buyers use mortgage calculators to understand whether a $350,000 home with a 6.5% rate fits their monthly budget before contacting a lender. Real estate investors evaluating rental properties run the numbers on multiple financing scenarios to ensure positive cash flow after the mortgage payment. Homeowners considering a refinance compare their current payment against a new rate to see how many months until the closing costs are recovered. Financial advisors helping clients plan for homeownership model different down payment sizes and loan terms to find the optimal balance between monthly affordability and long-term cost. Loan officers use these calculations daily to pre-qualify borrowers and present loan estimates that comply with Truth in Lending Act disclosure requirements.

This calculator computes your monthly payment using the standard amortisation formula that every lender uses. Enter the home price, down payment, annual interest rate, and loan term in years or months. The results show your monthly principal and interest payment, loan amount, total amount paid over the full term, and total interest cost. A full amortisation schedule breaks down every payment across the entire loan term into interest and principal portions. The optional Extra Principal Payment field shows how making additional payments each month shortens your loan term and reduces total interest. Toggle Advanced Mode to include annual property taxes, homeowners insurance, PMI, and HOA fees for a complete picture of your true monthly housing cost.

A mortgage is a secured loan used to purchase real estate, where the property itself serves as collateral for the lender. You borrow a fixed amount of money (the principal), agree to repay it over a set period (the term) at a fixed or adjustable interest rate, and make equal monthly payments until the loan is paid off. If you default on the payments, the lender can foreclose on the property and sell it to recover the remaining balance. This secured structure makes mortgages less risky for lenders than unsecured loans, which is why mortgage rates are typically lower than credit card or personal loan rates.

The principal of your mortgage is the home price minus your down payment. If you buy a $350,000 home with a $70,000 down payment (20%), your principal is $280,000. The interest rate, expressed as an Annual Percentage Rate (APR), determines how much extra you pay for borrowing. The term is the number of years over which you repay the loan. Common terms are 15, 20, and 30 years, with 30-year fixed-rate mortgages being the popular choice among American home buyers. According to the Federal Housing Finance Agency, approximately 90% of conventional home purchase loans in 2025 had 30-year terms.

Each monthly mortgage payment consists of two main components: interest (the lender’s fee for that month) and principal (the amount that reduces your balance). In the early years of a 30-year mortgage, roughly 70% to 80% of each payment goes toward interest. As the balance declines over time, a larger share of your payment goes toward principal. This process, called amortisation, is the same mechanism used by car loans and other installment loans. The amortisation schedule in this calculator shows you the exact interest and principal split for every month of your loan, so you can see exactly how your equity builds over time. For example, on a $280,000 loan at 6.5% for 30 years, the first month’s payment of $1,770 includes $1,517 in interest and only $253 in principal. By year 15, the split is roughly equal. By year 25, over $1,000 of each payment goes to principal.

The standard mortgage payment formula combines loan principal, monthly interest rate, and total number of payments to produce a fixed monthly amount that fully amortises the loan by the end of its term. Each example below applies this formula to a different borrowing scenario.

A fixed-rate mortgage (FRM) locks in your interest rate for the entire loan term. Your monthly principal and interest payment never changes, which makes budgeting predictable over 15, 20, or 30 years. Fixed-rate mortgages are the common choice in the United States, accounting for roughly 95% of conventional home purchase loans as of early 2026 according to Freddie Mac data. The tradeoff is that fixed rates are typically 0.5% to 1% higher than the initial rate on an adjustable-rate mortgage because the lender assumes all the interest rate risk over the full term.

An adjustable-rate mortgage (ARM) has an interest rate that changes periodically based on a benchmark index plus a margin set by the lender. The common ARM structure is the 5/1 ARM, where the rate is fixed for the first five years and then adjusts annually for the remaining 25 years. The initial ARM rate, often called the teaser rate, is typically lower than a comparable fixed rate. A borrower who takes a 5/1 ARM at 5.5% instead of a 30-year fixed at 6.5% saves roughly $220 per month on a $300,000 loan during the first five years. After the fixed period, the rate can rise by up to 2% per adjustment period with a lifetime cap of 5% to 6% above the initial rate, depending on the loan terms.

ARMs make sense for borrowers who plan to sell or refinance before the adjustable period begins. If you expect to move within five to seven years, the lower initial ARM rate saves you money without exposing you to future rate increases. ARMs also work for borrowers whose income is expected to rise significantly, making future rate increases manageable. The risk is that if home values drop or your financial situation changes, you may be stuck with an unaffordable payment after the rate adjusts. During the 2008 housing crisis, millions of ARM borrowers faced payment shock when their rates reset higher while home values fell, leading to widespread foreclosures. Understanding this tradeoff is essential before choosing an ARM over a fixed-rate mortgage. The Consumer Financial Protection Bureau requires lenders to disclose the maximum possible payment on an ARM before closing, and you should model worst-case scenarios using this calculator before committing.

First-time buyers face different challenges than move-up buyers or investors, and this calculator adapts to each situation. Consider a first-time buyer purchasing a $300,000 home with 5% down ($15,000) at 6.5% for 30 years. The loan amount is $285,000. The monthly principal and interest payment is $1,802. With PMI at 0.8% annually and estimated property taxes of $3,600 per year plus homeowners insurance of $1,200 per year, the true monthly payment rises to roughly $2,382. The buyer needs to earn approximately $5,700 per month in gross income to keep the housing payment below 42% of income, which is a common debt-to-income threshold for conventional loans.

A refinance scenario: A homeowner has a $250,000 remaining balance on a 30-year mortgage at 7% from 2023. Current rates have dropped to 5.75% for a 30-year fixed. Refinancing to the lower rate drops the monthly payment from $1,663 to $1,459, saving $204 per month. If closing costs are $6,000, the break-even point is roughly 29 months. If the homeowner plans to stay in the home for more than 2.5 years, refinancing makes financial sense. The calculator shows the new payment, total interest savings, and the amortisation schedule under the new terms.

An investment property scenario: An investor purchases a $450,000 duplex with 25% down ($112,500) at 7% for 30 years. The loan amount is $337,500 with a monthly payment of $2,245. If each unit rents for $1,800 per month, gross rental income is $3,600. After the mortgage payment, property taxes ($5,400/year), insurance ($2,400/year), and 8% property management ($3,456/year), the monthly net cash flow is roughly $450. The calculator helps the investor model different down payment sizes and rates to find the minimum rent needed for positive cash flow. A lower rate of 6.5% would increase monthly cash flow by about $120, demonstrating why investors shop rates aggressively. For current mortgage rate data and trends, see the Freddie Mac Primary Mortgage Market Survey (opens in new tab).

Ignoring PMI, taxes, and insurance. Many first-time buyers focus only on principal and interest when shopping for a home, then discover at closing that the true monthly payment is 30% to 50% higher. A $300,000 loan at 6.5% has a P&I payment of $1,896. Adding $300/month for taxes, $100/month for insurance, and $200/month for PMI (on a 5% down conventional loan) brings the total to $2,496. Buyers who budget only for P&I risk being house-poor after closing. Use the Advanced Mode to include all costs and get a realistic payment estimate.

Looking only at the monthly payment and ignoring total interest. A 30-year mortgage at 6.5% on a $300,000 loan costs $382,560 in interest over the full term. The same loan at 15 years at 5.5% has a monthly payment of $2,451 (higher than the 30-year payment of $1,896) but total interest drops to $141,240, saving $241,320. Extending the term to 40 years would lower the monthly payment further but push total interest above $500,000. Always compare both the monthly payment and the total interest to make an informed term decision.

Not shopping for rates. According to Freddie Mac data, the spread between the lowest and highest rate offered to different borrowers for the same loan product can exceed 1%. On a $300,000 loan, a 1% rate difference costs roughly $190 per month and $68,400 over 30 years. Getting quotes from at least three lenders, including a credit union, a local bank, and an online lender, can save tens of thousands of dollars over the life of the loan. All mortgage inquiries within a 45-day window count as a single credit inquiry for scoring purposes, so rate shopping does not hurt your credit score.

Forgetting about closing costs. Closing costs typically range from 2% to 5% of the loan amount and include origination fees, appraisal fees, title insurance, and prepaid items. On a $300,000 loan, closing costs of $9,000 add a real cost that is not reflected in the monthly payment. If you are comparing a no-closing-cost loan with a lower-rate loan that has closing costs, use the break-even calculation: divide the closing costs by the monthly savings to find the months needed to recoup the upfront expense. This calculator helps you compare the monthly payment impact, but you need to factor closing costs into your total affordability analysis separately.

Your mortgage payment is typically the largest single line item in your monthly budget. For most homeowners, it represents 25% to 40% of gross monthly income. Keeping this payment within a sustainable range is critical for long-term financial health. Lenders use the debt-to-income ratio (DTI) to determine how much you can borrow. The front-end DTI (housing payment divided by gross income) should stay below 28% for conventional loans, and the back-end DTI (all debt payments divided by gross income) should stay below 36% to 43%, depending on the loan program. A borrower earning $8,000 per month with no other debt can qualify for a housing payment up to roughly $2,240 to $2,800, depending on the lender and loan type. Exceeding these ratios strains your budget and increases the risk of default.

The mortgage payment also directly affects your ability to save for retirement, build an emergency fund, and invest. Every dollar spent on housing is a dollar not available for other financial goals. A difference of $300 per month in mortgage payment, compounded at 7% annual returns over 30 years, becomes a difference of roughly $340,000 in investment growth. Choosing the right loan terms and down payment size is not just about qualifying for a loan; it is about optimizing your long-term financial trajectory. Use the Debt-to-Income Ratio Calculator to see how your mortgage payment fits within your overall debt picture.

The loan term is one of the most important decisions you make when taking out a mortgage. A 30-year fixed-rate mortgage offers the lowest monthly payment and the most flexibility, but it costs the most in total interest. On a $300,000 loan at 6.5%, the 30-year payment is $1,896 and total interest is $382,560. A 15-year fixed-rate mortgage at 5.5% has a payment of $2,451 but total interest drops to $141,240. The 15-year borrower saves $241,320 in interest and builds equity twice as fast, but must afford $555 more each month.

A 20-year mortgage sits in the middle. At 6% on $300,000, the monthly payment is $2,149 with total interest of $215,880. This option balances a moderately higher payment with significant interest savings compared to the 30-year term. Many lenders offer rate discounts of 0.25% to 0.5% for shorter terms because the repayment risk is lower. A shorter term also builds home equity faster, which gives you access to home equity loans or lines of credit sooner if needed.

The right term depends on your cash flow, risk tolerance, and financial goals. If you have stable income and room in your budget, a 15-year term builds wealth faster through forced equity accumulation and lower total cost. If you value monthly flexibility and plan to invest the difference, a 30-year term at a low rate lets you arbitrage: borrow at 6.5% and invest at an expected 8% to 10% return in the stock market. This strategy only works if you actually invest the savings rather than spend them. The table below compares the three common terms side by side to help you evaluate the tradeoffs with concrete numbers.

Loan term length is one of the most consequential choices a borrower makes, affecting both the monthly payment amount and the total interest paid over the life of the mortgage. The reference table below summarises how common term structures compare.

Amortisation is the process of paying off a loan through scheduled, equal monthly payments over a fixed term. Each payment contains two parts: interest, which is the lender’s fee for borrowing the money, and principal, which reduces your outstanding balance. The proportions change over the life of the loan in a predictable pattern determined by the amortisation formula.

In the early years, interest consumes most of each payment because your outstanding balance is largest. On a $280,000 loan at 6.5% for 30 years, month one’s payment of $1,770 consists of $1,517 in interest and $253 in principal. After 10 years (120 payments), you have paid $212,400 total yet your balance has only dropped to $230,500. That means only $49,500 of your payments have gone toward principal; the remaining $162,900 went to interest. This front-loaded interest structure is why building equity feels slow in the early years of a mortgage.

After the midpoint, the balance shifts. By month 180 (year 15), your remaining balance is roughly $180,000. The same $1,770 payment now includes about $975 in interest and $795 in principal. By month 300 (year 25), your balance is about $80,000, and the payment splits into roughly $433 in interest and $1,337 in principal. In the final year, almost the entire payment goes to principal, and your equity grows rapidly toward full ownership. The amortisation schedule in this calculator shows you the exact month-by-month breakdown, giving you full visibility into how each payment affects your balance. You can see exactly when you will reach 20% equity (the point at which PMI can be removed) and when the loan will be fully paid off. This understanding helps you decide whether making extra payments, refinancing, or choosing a shorter term makes sense for your situation.

Loan officers and mortgage brokers use amortisation calculations daily to prepare loan estimates, compare rate scenarios, and help borrowers choose between loan products. The Good Faith Estimate and the Loan Estimate form, required under the Truth in Lending Act (TILA) and Real Estate Settlement Procedures Act (RESPA), both use the standard amortisation formula to calculate the projected monthly payment. Loan officers input the loan amount, rate, and term into their origination software, which uses the same formula implemented in this calculator. Understanding the math behind the numbers helps borrowers verify that the lender’s quoted payment matches the independent calculation. A discrepancy of more than a few dollars usually means a fee or charge has been included in the payment calculation or the rate differs from what was disclosed.

Real estate agents use mortgage calculators to help buyers determine their price range before starting the home search. Agents who can pre-qualify a buyer using a calculator provide more targeted showing recommendations, saving time for both the buyer and the agent. The National Association of Realtors reported that in 2025, 87% of home buyers used online tools to estimate mortgage payments before contacting an agent. Agents who reference specific monthly payment numbers from calculators provide a higher level of service than those who rely on general rules of thumb.

Financial planners and CFP professionals incorporate mortgage costs into comprehensive financial plans. The mortgage payment affects retirement savings capacity, emergency fund targets, and debt-to-income ratios used for other borrowing. Planners model scenarios for clients: what happens to monthly cash flow if rates rise 2% on an ARM? How much faster can a client retire if they choose a 15-year mortgage and invest the payment difference in a 401(k)? These professionals rely on the same amortisation math to provide data-driven advice. The mortgage calculator is not just a budgeting tool; it is a financial planning instrument that supports major life decisions about where to live, how much to borrow, and how to allocate income across competing financial priorities. For homebuying assistance programs, visit the USA.gov housing assistance programs (opens in new tab).

Prepayment penalties are rare on conventional mortgages but still exist on some subprime and non-qualified mortgage loans. A prepayment penalty charges you a fee, typically 1% to 2% of the remaining balance, if you pay off the loan early through sale or refinancing within the first three to five years. Ask your lender whether your loan has a prepayment penalty before signing, and if it does, calculate whether the penalty offsets the savings from refinancing or extra payments. Under the Dodd-Frank Act, qualified mortgages cannot have prepayment penalties, but non-qualified mortgages can charge penalties under specific conditions.

Rate locks protect you from interest rate increases between application and closing. A typical rate lock lasts 30 to 60 days. If rates rise during the lock period, your rate stays the same. If rates fall, you pay the locked rate unless you have a float-down option, which typically costs 0.25% to 0.5% of the loan amount. Always ask about the lock period and whether it covers the expected closing timeline. Builder incentives and lender credits sometimes require using the builder’s preferred lender and accepting their rate lock terms, which may not be the most competitive option.

Closing costs include lender origination fees, appraisal fees, credit report fees, title insurance, recording fees, and prepaid items such as property taxes and homeowners insurance escrow. Total closing costs typically range from 2% to 5% of the loan amount. On a $300,000 loan, expect to pay $6,000 to $15,000 at closing. You can finance closing costs by accepting a higher rate (lender credit) or paying them upfront. The break-even calculation: divide the closing costs by the monthly savings from the lower rate to determine how many months you need to stay in the home to benefit. If closing costs are $6,000 and the lower rate saves $100 per month, you need 60 months to break even. If you plan to sell before then, paying points or closing costs upfront does not make financial sense. For consumer protection information on mortgages, visit the Consumer Financial Protection Bureau’s mortgage resources.

Making extra principal payments is one of the most effective ways to reduce the total cost of your mortgage and build home equity faster. When you make an extra payment above the required monthly amount, every additional dollar goes directly to reducing your principal balance. This has two powerful effects: it shortens the total repayment period and reduces the total interest paid over the life of the loan, because a lower principal balance means less interest accrues each month going forward.

Consider a concrete example. A $300,000 mortgage at 6.5% for 30 years has a monthly payment of $1,896 and total interest of $382,560 over the full term. If you add an extra $100 per month to every payment, the mortgage is paid off in 322 months (26.8 years) instead of 360 months (30 years). You save 38 months of payments and reduce total interest from $382,560 to $321,480, saving $61,080. An extra $200 per month accelerates the payoff to 289 months (24.1 years) and saves $105,180 in interest. An extra $500 per month pays off the loan in just 218 months (18.2 years) and saves $187,890 in interest. The leverage is substantial because each extra dollar not only reduces the principal but also eliminates the future interest that dollar would have generated over the remaining term.

The extra payment field in this calculator shows you exactly how much you save and how many months you eliminate from your loan term. You can experiment with different amounts to find the extra payment that best balances your monthly budget against your long-term savings goals. The amortisation table updates to show the accelerated payoff schedule, so you can see your equity building faster with every payment.

The monthly housing expense picture extends beyond principal and interest alone. The bar chart below breaks down how PITI components typically distribute across a standard fixed-rate mortgage payment.

The bar chart above illustrates a fundamental tradeoff in mortgage financing: lower monthly payments come at the cost of significantly higher total interest. The blue bars show the monthly payment decreasing from $2,451 for a 15-year term to $1,896 for a 30-year term, a difference of $555 per month. The amber bars show the total interest paid over the full term, which rises from $141,000 for a 15-year term to $383,000 for a 30-year term. The 30-year borrower pays $242,000 more in total interest in exchange for a $555 lower monthly payment.

To decide which term is right for you, calculate whether you can afford the higher payment and how you would use the savings from a lower payment. If you choose the 30-year term and invest the $555 monthly difference in a diversified portfolio earning 7% average annual returns, you would accumulate roughly $628,000 over 30 years. After subtracting the $242,000 in extra interest paid on the 30-year mortgage, you come out ahead by $386,000. However, this strategy requires the discipline to invest every dollar of the payment difference every month for three decades, and it assumes investment returns that are not guaranteed. If you spend the $555 instead of investing it, the 30-year term leaves you with no additional wealth and $242,000 more in interest costs. The right answer depends on your financial discipline, risk tolerance, and long-term goals. Run the numbers through this calculator and the Compound Interest Calculator to model both paths with your specific numbers.

Private mortgage insurance (PMI) is a type of insurance that protects the lender if you default on your mortgage. PMI is typically required when your down payment is less than 20% of the home’s purchase price. It adds a monthly cost to your mortgage payment, typically ranging from 0.3% to 1.5% of the original loan amount per year, depending on your credit score and loan-to-value ratio. A borrower with a 740 credit score putting 5% down on a $300,000 loan might pay PMI at 0.6%, which equals $150 per month. The same borrower with a 680 credit score might pay 1.2%, or $300 per month.

PMI is not permanent. Under the Homeowners Protection Act of 1998, PMI must be automatically terminated when your loan balance reaches 78% of the original property value (22% equity), provided your payments are current. You can request early cancellation in writing when your balance reaches 80% of the original value (20% equity). If your property value has increased significantly, you may be able to request cancellation earlier by getting a new appraisal to demonstrate that your loan-to-value ratio has dropped below 80%. The amortisation schedule in this calculator shows you exactly when you will reach 20% equity based on your payment schedule, including extra payments. Accelerating your payoff through extra principal payments or biweekly payments can remove PMI months or years earlier, saving you hundreds or thousands of dollars in PMI premiums.

Property taxes and homeowners insurance are recurring costs that significantly affect your true monthly housing payment. Property taxes are assessed by local governments based on the assessed value of your home. The average effective property tax rate in the United States is roughly 0.99% of the home’s value, but rates vary widely by location. New Jersey has an average effective rate of 2.23%, while Hawaii averages 0.31%. On a $350,000 home, the difference between these two extremes is $7,805 per year in New Jersey versus $1,085 in Hawaii. Your lender typically collects property taxes through an escrow account, adding one-twelfth of the annual tax bill to each monthly payment. Use the Advanced Mode to enter your estimated annual property tax and see its impact on your monthly payment.

Homeowners insurance protects your property against damage from fire, wind, hail, theft, and liability claims. Standard HO-3 policies cover the structure at replacement cost and personal property at actual cash value or replacement cost. The average annual premium in the United States is roughly $1,400 for a standard policy, but costs vary by state, property value, and coverage limits. Florida, Texas, and Oklahoma have the highest average premiums due to hurricane and storm risk. Flood insurance is separate and required by lenders if your property is in a flood zone; it adds $700 to $1,200 per year through the National Flood Insurance Program. The Advanced Mode in this calculator lets you include both property taxes and homeowners insurance so you can see your full PITI (Principal, Interest, Taxes, Insurance) payment, which is the number lenders use to qualify you for the loan.

The mortgage payment is the largest cost of homeownership, but it is not the only cost. A complete homeownership budget includes several additional categories. Maintenance and repairs typically cost 1% to 2% of the home’s value per year, according to the one percent rule commonly cited by real estate professionals. On a $350,000 home, that means setting aside $3,500 to $7,000 annually for roof repairs, HVAC replacement, plumbing issues, painting, and general upkeep. Newer homes tend toward the lower end, while older homes require more. The first year of homeownership often surprises new buyers with unexpected repair costs that were not apparent during the inspection.

Utilities for a single-family home typically add $300 to $600 per month depending on location, home size, and energy efficiency. Electricity, natural gas, water, sewer, trash collection, and internet all contribute to the monthly carrying cost. An energy-efficient home with solar panels could reduce this to under $200 per month, while a large older home with poor insulation could exceed $800. Homeowners association (HOA) fees apply to many planned communities and condominium buildings. Monthly HOA fees range from $50 for basic maintenance in a suburban subdivision to over $1,000 for a full-service condo building with a doorman, pool, and gym. The Advanced Mode in this calculator includes HOA fees so they are factored into your true monthly payment.

When you add all these costs together, the true monthly cost of owning a $350,000 home with 10% down at 6.5% for 30 years is roughly $3,100 to $3,800 per month, compared to the P&I payment of $1,896 alone. Understanding the full cost before you buy prevents the financial stress that leads to foreclosure or forced sale. The Federal Reserve Bank of Philadelphia’s Consumer Finance Institute reports that payment shock from unexpected housing costs is a leading predictor of mortgage default in the first three years of ownership. Use the Advanced Mode to build a complete budget and make sure the true monthly cost fits comfortably within your income.

The formulas, data, and methodologies used in this calculator are based on standard mortgage industry practices and the following authoritative sources. The amortisation formula follows the standard present value of an annuity calculation used by all federally regulated lenders under the Truth in Lending Act (Regulation Z). Rate benchmarks reference Freddie Mac Primary Mortgage Market Survey data and Fannie Mae rate guidance. PMI cancellation rules follow the Homeowners Protection Act of 1998 (12 USC 4901–4910). Property tax data references U.S. Census Bureau annual surveys of state and local government finances.

If you found this mortgage calculator useful, explore these related tools. The Debt-to-Income Ratio Calculator helps you understand how your mortgage payment fits within your overall debt picture and what loan amount you qualify for based on your income. The Loan EMI Calculator applies the same amortisation formula to personal loans, car loans, and other installment debt. The Compound Interest Calculator shows how investing the money you save on interest could grow over time. Visit the Finance category to find more tools for budgeting, saving, and borrowing decisions.

This mortgage calculator gives you a complete picture of your home financing, from the monthly principal and interest payment to a full amortisation schedule covering the entire loan term. The extra principal payment feature shows exactly how much you save in interest and how many months you eliminate from your loan by paying a little more each month. The Advanced Mode includes property taxes, homeowners insurance, PMI, and HOA fees for a realistic estimate of your true monthly housing cost. The reference tables for term comparisons and rates by credit score help you understand where your loan fits in the broader market. Whether you are buying your first home, refinancing an existing mortgage, or advising clients on financing decisions, this calculator provides the numbers you need to make an informed choice.