How to Use This Mortgage Calculator
Enter your home price and down payment — either as a dollar amount or percentage and both fields sync automatically. Select your state from the dropdown to apply the correct average property tax rate, or enter your exact county rate in the override field for maximum precision. Enter your interest rate, loan term, annual home insurance, HOA fees if applicable, and any extra monthly payment you plan to make above the required minimum. Click Calculate Mortgage to see your complete payment breakdown, PMI status and removal date, payoff date, interest saved with extra payments, and a full amortization schedule organized by year — click any year row to expand and see every month in detail.
What Makes Up Your Monthly Mortgage Payment
Most homebuyers focus only on the principal and interest payment — the base loan payment — but your true monthly housing cost includes up to five components. Understanding each one before you buy prevents the budget shock that catches so many first-time buyers off guard.
Principal and interest is calculated using the standard amortization formula and stays fixed for the life of a fixed-rate mortgage. On a $280,000 loan at 6.8% over 30 years the P&I payment is $1,830 per month. Property taxes are collected monthly by your lender and held in escrow. Tax rates vary dramatically by state — from 0.28% in Hawaii to 2.23% in Illinois and 2.49% in New Jersey. On a $350,000 home in New Jersey property taxes add $726 per month to your payment. That same home in Hawaii adds only $82 per month. This is why selecting your state matters so much — a national average calculator gives you a number that could be off by $500 or more per month depending on where you live.
Homeowners insurance averages $1,428 annually nationwide in 2025 — approximately $119 per month — but varies significantly by location, construction type, and coverage. Coastal and disaster-prone areas commonly pay $3,000 to $6,000 annually. Private mortgage insurance is required on conventional loans when your down payment is less than 20% of the purchase price. PMI typically costs 0.5% to 1.5% of the original loan amount annually. On a $280,000 loan at 1% annual PMI rate that is $233 per month until your equity reaches 20% of the original home value — at which point you have the right to request cancellation under the federal Homeowners Protection Act of 1998.
| State | Avg Property Tax | Annual Tax on $350K | Monthly Added |
|---|---|---|---|
| Hawaii | 0.28% | $980 | $82 |
| California | 0.76% | $2,660 | $222 |
| Florida | 0.89% | $3,115 | $260 |
| National Avg | 1.10% | $3,850 | $321 |
| Texas | 1.68% | $5,880 | $490 |
| New York | 1.63% | $5,705 | $475 |
| New Jersey | 2.23% | $7,805 | $650 |
How the Amortization Schedule Works
The amortization schedule shows how each monthly payment is split between principal and interest over the life of the loan. In the early years of a 30-year mortgage the vast majority of each payment goes toward interest. On a $280,000 loan at 6.8% your very first payment of $1,830 is split approximately $246 to principal and $1,584 to interest. By year 15 the monthly split has shifted to approximately $550 principal and $1,280 interest. By the final years nearly the entire payment reduces your balance.
This interest-heavy early structure is why extra principal payments made in the early years of a loan have such a powerful impact. An extra $200 per month on a $280,000 loan at 6.8% eliminates approximately $55,000 in total interest and pays off the loan more than 5 years early. Every extra dollar of principal paid in early years eliminates multiple dollars of future interest that would otherwise compound on top of it. Use the extra payment field and see the exact savings for your loan.
30-Year vs 15-Year Mortgage
On a $280,000 loan the 30-year payment at 6.8% is $1,830 per month with $378,800 in total interest paid. The 15-year payment at a typical 6.3% rate is $2,414 per month — $584 more — but total interest paid drops to just $154,700, saving $224,100. The right choice depends on your cash flow and whether you would reliably invest the $584 monthly difference if you chose the 30-year loan. If you would invest it in a diversified portfolio the 30-year loan may ultimately produce more wealth. If the extra cash would be spent the 15-year loan forces the savings and almost certainly produces better long-term financial outcomes.
Frequently Asked Questions
What is the current average 30-year mortgage rate?
Average 30-year fixed mortgage rates in early 2025 are approximately 6.7% to 6.9% depending on lender, credit score, down payment, and loan type. Borrowers with credit scores above 760 and 20% or more down typically qualify for rates at or below the average. Always compare quotes from at least three lenders — the difference between the best and worst offer can easily exceed 0.5%, which on a $300,000 loan represents over $30,000 in additional interest over 30 years.
What is PMI and when can I remove it?
Private mortgage insurance protects the lender if you default. It is required on conventional loans with less than 20% down and typically costs 0.5% to 1.5% of the loan annually. Under the Homeowners Protection Act you can request PMI cancellation when your loan balance reaches 80% of the original purchase price. Lenders must automatically cancel it at 78%. Our calculator shows exactly which month this happens based on your specific loan.
Should I make extra mortgage payments?
Extra payments earn a guaranteed return equal to your mortgage interest rate — on a 6.8% mortgage every extra dollar saved earns 6.8% guaranteed. This beats most savings accounts and bonds. However if you carry high-interest debt above 8% APR or have not maxed your 401(k) employer match, those should come first. Extra mortgage payments make the most financial sense after high-interest debt is eliminated and tax-advantaged retirement accounts are maximized.
How does property tax affect my payment?
Property tax is collected monthly by your lender and held in an escrow account until your annual bill is due. It is a significant and often underestimated part of the true cost of homeownership. Rates vary from 0.28% in Hawaii to 2.49% in New Jersey — a difference of over $7,700 per year on a $350,000 home. Always research the property tax rate for the specific county and municipality you are buying in, not just the state average, as local rates can vary substantially within the same state.
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