New York Mortgage Calculator (with New York Property Taxes & Insurance)

New York is one of the most expensive and most locally variable property tax markets in the country, which makes a plain principal-and-interest quote almost useless for budgeting. A borrower in Buffalo and a borrower in Great Neck can finance the exact same loan amount at the exact same rate and still owe wildly different amounts every month once the local tax bill is added. This calculator solves the amortization math with the same amortization primitive used across every lending calculator on this platform, then layers on a statewide average effective property tax rate of 1.73% of the purchase price and a flat $125 monthly homeowners insurance estimate so the total monthly payment (PITI: principal, interest, taxes, insurance) reflects what actually leaves a New York homeowner's bank account.

The 1.73% figure is a blended statewide average pulled from published effective property tax rate studies. It sits well above the national median because New York funds a large share of school and municipal budgets through property levies rather than income or sales tax. In practice, effective rates swing enormously by county: parts of upstate New York, including areas around Syracuse and Rochester, routinely see effective rates above 2.5%, while New York City's own effective rate on owner-occupied one, two, and three family homes is held artificially low by state-mandated assessment caps and abatement programs like the co-op/condo abatement. Anyone using this tool for a specific address should treat the 1.73% default as a starting estimate and verify the actual county and school district millage before finalizing a purchase offer.

The engine performs a standard fixed-rate mortgage amortization, then adds two escrow-style line items on top of the debt service figure.

1. Down payment and loan principal. The home price is multiplied by the down payment percentage to get the cash down payment. Subtracting that from the home price gives the financed loan principal. At the default inputs, $380,000 minus 20% down ($76,000) leaves a $304,000 loan.
2. Monthly interest rate. The annual APR is divided by 12 to get the periodic rate applied each month across a fixed 360-month (30-year) term.
3. Principal and interest (P&I). The engine runs the standard amortizing loan payment formula, PMT = P × [r(1+r)^n] / [(1+r)^n − 1], on the loan principal, monthly rate, and 360 periods. This is computed with the site's Decimal.js-based amortization primitive rather than native floating-point math, so the schedule reconciles to the cent across all 360 rows.
4. Property tax escrow. Home price is multiplied by the 1.73% effective rate and divided by 12 to produce a monthly property tax estimate that gets folded into the total payment.
5. Insurance escrow. A flat $125 monthly homeowners insurance placeholder is added; this is a national baseline estimate and not a New York-specific premium quote.
6. Total monthly payment (PITI). Principal and interest, monthly property tax, and monthly insurance are summed to produce the headline number shown at the top of the calculator.

Using the calculator's default inputs: a $380,000 home price, 20% down payment, and a 6.5% fixed 30-year mortgage rate.

• Down payment: $380,000 × 20% = $76,000
• Loan principal: $380,000 − $76,000 = $304,000
• Monthly interest rate: 6.5% ÷ 12 = 0.5416667%
• Monthly principal and interest: $1,921.49 (verified against the amortization schedule's own payment calculation, which sums exactly across all 360 periods)
• Monthly estimated New York property tax (calculated on the full home price, not the loan balance): $380,000 × 1.73% ÷ 12 = $547.83
• Monthly insurance estimate: $125.00
• Total monthly payment (PITI): $1,921.49 + $547.83 + $125.00 = $2,594.32

Over the full 360-month term, this loan accrues roughly $387,735 in total interest, meaning the borrower repays close to $691,735 in principal and interest alone before ever counting taxes or insurance. That interest total is why shopping for even a quarter-point rate improvement, or making extra principal payments early in the schedule, has an outsized effect on New York mortgages, where loan sizes tend to run well above the national average.

• Mortgage recording tax (MRT). New York charges a mortgage recording tax on most home loans, typically around 1.8% to 1.925% of the loan amount depending on county, with New York City levying an additional CEMA-eligible surcharge. This is a real, often five-figure closing cost that this monthly-payment calculator does not model.
• NYC mansion tax and transfer taxes. Purchases above $1 million in New York City trigger a graduated "mansion tax" on the buyer, on top of standard state and city transfer taxes paid by the seller. Neither appears in this monthly payment estimate.
• Actual local millage. The 1.73% property tax figure is a statewide blend. Actual county, town, village, and school district levies vary by more than a full percentage point in either direction and should be confirmed against the specific parcel.
• Co-op maintenance fees or condo common charges. A large share of New York City housing stock is co-ops and condos, where monthly maintenance or common charge bills, which are not mortgage payments at all, often exceed the mortgage itself.
• Private mortgage insurance (PMI). Below 20% down, most conventional loans require PMI, which this calculator does not add since it assumes a 20% down default.
• STAR exemption savings. New York's School Tax Relief (STAR) program reduces the school tax portion of many owner-occupied bills; this calculator does not net out any exemption.

• Assuming the statewide tax average applies to your parcel. Because New York's effective rates range from roughly 1% in parts of Manhattan to over 3% in some upstate school districts, using 1.73% for a specific address can misstate the true payment by hundreds of dollars a month.
• Forgetting the mortgage recording tax at closing. Buyers who budget only for the standard 2-4% closing cost rule of thumb used in other states are often surprised by New York's additional recording tax, which is separate from title insurance and attorney fees.
• Skipping the required attorney. New York is an attorney-closing state; real estate attorney fees are a mandatory closing cost that does not appear in a monthly payment estimate but affects the cash needed at the table.
• Comparing co-op and condo purchases the same way. Co-op purchases are financed with a share loan against a proprietary lease rather than a conventional mortgage against real property, and lenders apply different underwriting rules than this calculator assumes.
• Ignoring flood zone requirements. Coastal and low-lying areas of New York City and Long Island frequently require flood insurance in addition to standard homeowners coverage, which the flat $125 estimate does not include.

• New York State Department of Taxation and Finance, Office of Real Property Tax Services, equalization and effective tax rate data.
• New York State Department of Financial Services, Mortgage Recording Tax guidance and lender disclosure requirements.
• Consumer Financial Protection Bureau, Regulation Z (Truth in Lending Act) and Loan Estimate/Closing Disclosure standards.
• New York City Department of Finance, Real Property Transfer Tax and residential mansion tax schedules.
• Tax Foundation, State and Local Property Tax Collections per Capita and effective rate comparisons.