US Real Estate & Mortgage Research Analyst
Published: March 28, 2026 · Updated: March 28, 2026 · 7 min read
Key Takeaways
- • Tax = Assessed Value × local tax rate
- • Rates vary by county, city, and school district
- • You can often appeal a high assessment
- • Taxes usually flow through your monthly escrow
- • They count toward the federal SALT deduction cap
Property taxes are one of the largest recurring costs of homeownership, yet buyers often underestimate them. Because they are set locally, they can add or subtract hundreds of dollars from your monthly payment depending on where you buy. Here's how they work.
The Basic Formula
Annual Property Tax
Assessed Value × Tax Rate = Annual Property Tax
Example: A $400,000 assessed value at a 1.1% rate = $4,400/year, or about $367/month through escrow.
Note that "assessed value" is not always the same as market value — many areas assess at a percentage of market value or use a different base. Check how your locality defines it.
Why Location Drives the Bill
Two nearly identical homes can have very different tax bills if they sit in different tax jurisdictions. High-service areas with strong schools may carry higher rates, while some states limit annual increases or offer homestead exemptions. When comparing neighborhoods, always factor the tax rate into the total cost of ownership.
Assessments and Appeals
Local assessors assign a taxable value, usually on a set cycle. If your assessment looks high compared with recent comparable sales — or if your home has condition issues the assessor missed — you may be able to appeal. Gather comparable sales or evidence, file by the local deadline, and follow the assessor's process. A successful reduction lowers your bill going forward.
Taxes and Your Mortgage Escrow
Most lenders collect 1/12 of your annual tax with each mortgage payment and pay the bill from escrow when it comes due. Each year they perform an escrow analysis and adjust your payment if taxes changed. A surprise tax increase can raise your monthly payment even if your interest rate never moves.
Estimate Your Full Payment
Use our free Mortgage Payment Calculator to add your local tax rate and insurance into a true PITI payment, and our Closing Cost Estimator to see the initial escrow deposit you will fund at closing.
Editor Update Note
This article was last reviewed and updated on March 28, 2026. Assessment methods, rates, exemptions, and deduction rules vary by location and change over time; verify with your local assessor and a tax professional.
Try These Free Calculators
- Mortgage Payment Calculator — Add your local tax rate to see the full PITI payment.
- Closing Cost Estimator — Estimate the initial escrow deposit at closing.
- Property Tax by State — Compare effective rates for all 50 states and DC.
- Median Home Value by State — See how home prices compound with tax rates across states.
Frequently Asked Questions
How are property taxes calculated?
Most localities multiply your home's assessed value by the local tax rate (often called a millage rate). The formula is: Assessed Value × Tax Rate = Annual Tax. Assessment methods and rates vary widely by state and county, which is why the same home can carry very different tax bills in different areas.
Why do property taxes vary so much by location?
Tax rates are set locally to fund schools, roads, emergency services, and other public services, so they differ by county, city, and even school district. Some states also cap annual increases or exempt a portion of a home's value, which changes how fast bills rise over time.
What is a property tax assessment and can I appeal it?
An assessment is the value the tax authority assigns to your home for tax purposes. If it seems too high relative to recent comparable sales, many jurisdictions let you appeal — usually by filing with the assessor and providing comparable sales or evidence of condition issues. Deadlines and procedures are local, so check your assessor's office.
Are property taxes deductible?
Property taxes are generally deductible as an itemized deduction, but they count toward the federal $10,000 state and local tax (SALT) cap for most filers. Whether the deduction helps depends on whether your total itemized deductions exceed the standard deduction. Consult a tax professional for your situation.
How do property taxes affect my mortgage payment?
Lenders typically collect a portion of your annual property tax each month through escrow and pay the bill when due. Higher taxes mean a higher monthly PITI payment, which also affects how much house you can afford. Your escrow is reviewed annually and adjusted if taxes change.