Mortgage rate comparisons get all the attention in home-buying advice, but property tax rates vary just as dramatically between states — and unlike a mortgage rate, that cost never goes away, doesn't get refinanced, and applies for as long as you own the home.
The actual spread between states
Effective property tax rates — property tax as a percentage of home value — range from under 0.3% in the lowest states to over 2% in the highest, based on official BEA-sourced data. Two states with otherwise similar home prices can produce dramatically different annual tax bills purely because of where the home sits: a $400,000 home taxed at 0.4% costs $1,600 a year in property tax, while the same $400,000 home taxed at 2% costs $8,000 a year — a $6,400 difference that repeats every single year of ownership.
Why the variation is so large
States fund local services — schools, roads, police and fire, parks — through some combination of income tax, sales tax, and property tax. States that keep income tax low or skip it entirely still need to fund those services somehow, and property tax is often the lever that absorbs the difference. This is part of why some states with no wage income tax nonetheless post above-average property tax rates: the tax burden didn't disappear, it shifted to a different line item.
Why the state average is a starting point, not the final number
Property taxes are set locally — by county, city, and school district — not by the state as a single uniform rate. It's common for effective rates to vary by more than a full percentage point between different counties within the SAME state, driven by local school funding needs, municipal services, and how recently the area was reassessed. A state-level average is genuinely useful for comparing broad regions before you've settled on a specific area, but once you're evaluating a specific home, your county assessor's actual rate is what matters.
How it flows into your mortgage payment
For most mortgages, property tax isn't paid as one big annual bill directly by the homeowner — it's collected monthly through an escrow account, roughly 1/12 of the estimated annual amount added to every mortgage payment, the "T" in the standard PITI (Principal, Interest, Taxes, Insurance) breakdown. A higher local property tax rate raises your MONTHLY housing payment just as directly as a higher interest rate would, which is why it deserves the same scrutiny during a home search as the mortgage rate itself.
Common mistakes
The most common mistake is comparing home prices across states or regions without also comparing property tax rates — a cheaper home in a high-tax area can end up costing more per month than a pricier home in a low-tax one. The second is assuming the tax bill stays flat over time; most jurisdictions reassess periodically, and rising home values (or new local levies) can increase the bill even with no rate change. The third is treating the state average as your exact number instead of checking your specific county's current effective rate before finalizing a home search.