Property taxes and insurance vary enormously across the country — from under 0.3% in Hawaii to 2.2%+ in New Jersey. Pick your state for a mortgage calculator pre-loaded with local property-tax rates, typical home values and average insurance, plus the live national rate and colorful payment-breakdown charts.
Two buyers with identical loan amounts and interest rates can have very different monthly payments depending on where they live. The reason is the two largest escrow add-ons: property taxes and homeowners insurance. Property-tax rates range from roughly 0.29% of a home's value per year in Hawaii to over 2.2% in New Jersey and Illinois — a difference that can mean hundreds of dollars a month on the same house. Homeowners insurance varies just as widely, from under $1,000 a year in low-risk states like Oregon and Vermont to well over $5,000 in hurricane-exposed Florida and tornado-prone Oklahoma. A national mortgage calculator that ignores these state differences can understate your real payment by $300 to $900 a month.
Each calculator on this page is pre-loaded with that state's average effective property-tax rate, typical home value and average insurance premium, and the interest-rate field pulls the current national 30-year average so your estimate reflects today's market. Adjust any field to match your actual home, down payment and loan terms. Whether you're comparing the cost of buying in a no-income-tax state like Texas, Florida or Washington, weighing high-property-tax states like New Jersey or Illinois, or budgeting for an expensive market like California or Hawaii, these tools give you a realistic, all-in monthly payment instead of a misleading principal-and-interest figure. Remember that rates and tax figures vary by county and lender — use these calculators for planning, then confirm exact numbers with a lender's official Loan Estimate.
A national mortgage calculator quietly assumes the parts of a payment that are not principal and interest are broadly similar everywhere. They are not, and the spread is larger than any realistic difference in interest rate. Across the states and DC covered here, effective property-tax rates run from about 0.29% in Hawaii to 2.23% in New Jersey — a range of nearly eight to one — while average homeowners insurance runs from roughly $900 a year in Oregon to $5,500 in Florida, a spread of about six to one.
Translated into a monthly payment, those differences stop being abstract. On a typical New Jersey home the property-tax line alone comes to around $950 a month, while on a typical Hawaii home — despite Hawaii's far higher prices — it is closer to $205, because the rate is so much lower. Insurance behaves the same way: Florida's average premium is about $458 a month against Oregon's $75. Neither figure appears in a headline rate comparison, and together they can outweigh it.
The two components also move for unrelated reasons, which is why they have to be modelled separately rather than as a single percentage add-on. Property tax is a policy variable set by state and local assessment rules — caps on assessed-value growth, homestead exemptions and school-funding arrangements all shape the effective rate. Insurance is a risk variable driven by hurricane, hail, wildfire and flood exposure, which is why several states with low taxes carry high premiums and the reverse is equally common.
Each state page here uses that state's own figures rather than a national average, which is what makes the comparison meaningful. The numbers are typical values for planning rather than quotes: an individual assessment, an exemption you qualify for, a specific property's claims history or a coastal location can all move the real figure substantially. The tools are built to show which line of the payment dominates in a given state, so you know where to check an actual quote most carefully.