Taxes, Insurance & Extra Costs
These costs are automatically added to your estimated monthly payment and the chart below.
Mortgage Calculator
Estimate your monthly payment, total interest, and full amortization schedule — including taxes, insurance, and PMI.
Estimated Monthly Payment
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Includes principal, interest, property tax, insurance, PMI, and HOA fees
$0
Includes principal, interest, property tax, insurance, PMI, and HOA fees
Principal & Interest
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Loan Amount
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Total Interest Paid
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Total Cost of Loan
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Payoff Date: —
Amortization Schedule
How Mortgage Payments Are Calculated
A mortgage is an amortizing loan: every payment you make is split between interest (the lender's charge for the money you're borrowing) and principal (the amount that actually reduces your debt). For a fixed-rate mortgage, the total payment stays the same every month, but the split between principal and interest shifts steadily over time — early in the loan, most of your payment goes toward interest, because your balance is still large; toward the end, most of it goes toward principal, because the balance has shrunk.
The fixed monthly principal-and-interest payment is calculated with the standard amortization formula:
Where M is the monthly principal-and-interest payment, P is the loan amount (home price minus down payment), r is the monthly interest rate (your annual rate divided by 12), and n is the total number of monthly payments (loan term in years × 12). On a $240,000 loan at 6.5% over 30 years, this works out to a payment of approximately $1,517 per month, with total interest of roughly $306,000 over the full term — more than the loan amount itself.
What's Included in Your Monthly Payment: PITI, PMI, and HOA
Lenders and real-estate professionals describe the full monthly housing cost with the acronym PITI: Principal, Interest, Taxes, and Insurance. Property tax and homeowners insurance are usually collected monthly into an escrow account, then paid on your behalf when the annual bills come due — so even though they're billed yearly, you budget for them monthly. On top of PITI, two more costs can apply: PMI (private mortgage insurance), required on conventional loans with a down payment under 20%, and a monthly HOA fee if you're buying in a community with shared amenities or a condo association. This calculator adds all of these together so the "Estimated Monthly Payment" reflects what you'll actually owe each month — not just the loan payment.
How Your Down Payment Affects PMI
Putting down less than 20% on a conventional loan triggers Private Mortgage Insurance, which protects the lender (not you) in case of default. PMI typically costs 0.5% to 1.5% of the loan amount per year, billed monthly. The good news: under the federal Homeowners Protection Act of 1998, lenders must automatically cancel PMI once your loan balance falls to 78% of the original home value — calculated purely from your amortization schedule, not from market appreciation. You can also proactively request cancellation at 80% loan-to-value, sometimes sooner if your home has appreciated and you order a new appraisal. This calculator applies the 78% automatic cutoff directly in your amortization schedule, so PMI disappears from your projected payment at the correct month.
15-Year vs. 30-Year Mortgages: A Real Comparison
The loan term has a bigger effect on total interest than almost any other variable. Consider a $240,000 loan:
| Term | Rate | Monthly P&I | Total Interest |
|---|---|---|---|
| 30 years | 6.5% | $1,517 | $306,000 |
| 15 years | 6.0% | $2,025 | $124,500 |
The 15-year loan costs roughly $500 more per month but saves over $180,000 in interest and is paid off twice as fast. A 30-year term makes sense if you need the lower payment for cash-flow flexibility or to qualify for a larger loan; a 15-year term makes sense if you can comfortably afford the higher payment and want to minimize lifetime interest and build equity faster.
How Extra Payments Can Save You Tens of Thousands
Because interest is calculated only on your remaining balance, any extra amount you apply directly to principal reduces the interest charged every month afterward — and the earlier in the loan you start, the larger the compounding effect. On that same $240,000 loan at 6.5% over 30 years, adding just $200 extra per month shortens the loan by roughly 8 years and saves approximately $96,000 in total interest — without refinancing or changing your rate. There's no penalty for paying extra on most modern mortgages, but always confirm your specific loan has no prepayment penalty before making large extra payments.
How to Use This Calculator
Enter your home price and down payment (in dollars or as a percentage — they stay linked), choose a loan term and enter your interest rate, then expand "Taxes, Insurance & Extra Costs" to add your property tax, insurance, PMI rate, HOA fee, or any extra monthly payment. Results update instantly: your loan amount, monthly principal and interest, full estimated monthly payment, a payment breakdown chart, total interest paid, total cost of the loan, and your projected payoff date. The amortization schedule below shows the full year-by-year or month-by-month breakdown of every payment, with a toggle to switch between annual summaries and the complete monthly detail.
Frequently Asked Questions
How is my monthly mortgage payment calculated?
Your principal and interest payment is calculated with the standard amortization formula: M = P[r(1+r)^n] / [(1+r)^n − 1], where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of monthly payments. This produces a fixed payment for the life of a fixed-rate loan, but the mix of principal and interest within that payment shifts every month — early payments are mostly interest, later payments are mostly principal. Your full monthly housing cost also typically includes property tax, homeowners insurance, and possibly PMI and HOA fees, all of which this calculator adds on top of principal and interest.
What is PMI and when can I stop paying it?
Private Mortgage Insurance (PMI) protects the lender — not you — if you default on a conventional loan with a down payment under 20%. It typically costs 0.5%–1.5% of the loan amount per year, split into monthly installments. Under the U.S. Homeowners Protection Act of 1998, lenders must automatically cancel PMI once your loan balance reaches 78% of the original home value, assuming you're current on payments. You can also request cancellation yourself once you reach 80% loan-to-value, often by ordering a new appraisal. This calculator models that automatic 78% cutoff in the amortization schedule.
Should I choose a 15-year or 30-year mortgage?
A 30-year mortgage has a lower monthly payment, which improves cash flow and qualification odds, but you'll pay far more interest over the life of the loan. A 15-year mortgage has a higher monthly payment but usually a lower interest rate and dramatically less total interest. On a typical loan, the 15-year term can cut total interest paid by more than half compared to a 30-year term at a similar rate, while paying it off twice as fast. The right choice depends on your monthly budget, job stability, and whether you'd rather invest the payment difference elsewhere. Try both terms in the calculator above to compare your exact numbers.
What's included in my total monthly payment besides principal and interest?
Lenders commonly refer to your full housing payment as PITI: Principal, Interest, Taxes, and Insurance. Property tax and homeowners insurance are usually collected monthly into an escrow account and paid on your behalf when annual bills are due. If your down payment is under 20%, PMI is added on top. If you're buying a condo, co-op, or a home in a planned community, a monthly HOA (homeowners association) fee may also apply, covering shared amenities and maintenance. This calculator includes all of these so your estimated monthly payment reflects your real, total housing cost — not just the loan payment.
How much can extra payments really save me?
Because mortgage interest is calculated on your remaining balance, any extra amount applied directly to principal reduces the interest charged in every subsequent month — and the earlier you start, the bigger the compounding effect. For example, on a $240,000 loan at 6.5% over 30 years, adding just $200 extra per month can shorten the loan by roughly 8 years and save on the order of $90,000–$100,000 in total interest. Use the 'Extra Monthly Payment' field above to see the exact effect on your own loan amount, rate, and term — the amortization schedule updates instantly to show your new payoff date and interest savings.