Zypper
Start free trial

Property tax

In US real estate, property tax is a recurring tax imposed by local taxing authorities using a property's taxable value and applicable rates, with assessment methods and exemptions varying by jurisdiction.

Also called: Real estate tax, Real property tax

by Lee Schmidt

Published November 7, 2026

Your property tax bill can change even when your mortgage interest rate stays fixed. Property tax is an obligation tied to the property; mortgage escrow is a way to collect and pay it. The calculation depends on the property's taxable value, applicable rates, and any tax relief you qualify for. The assessed value used in that process need not match what you could sell the home for today.

In a sentence

  • "Our property tax is $3,600 a year, so we reserve $300 a month."
  • "The property tax is the bill, while escrow is how our mortgage servicer collects the money to pay it."
  • "A higher market value does not tell us exactly how much our property tax will change."

How it's calculated

Property tax calculations start with the local assessment process, not necessarily the purchase price or a current sale estimate.

  1. Find the assessed value and valuation date on your assessment notice. Read how the jurisdiction determines that value rather than assuming it equals today's market value.
  2. Identify any exemptions or other adjustments that apply under local rules to find the taxable value. Different taxes on the same property can use different taxable values.
  3. Apply the relevant rates. A bill can combine taxes from several authorities, such as a county, city, and school district.
  4. Reconcile the calculation with the bill, including any tax credits or separately listed assessments and charges. Use the actual payment schedule to plan cash; setting money aside monthly does not mean the tax is due monthly.

When all applicable taxes use the same taxable value, the basic calculation before credits or separate charges is:

Annual property tax = taxable property value × combined applicable tax rate

The assessment notice explains the valuation, while the tax bill shows what is charged and when payment is due. Keep both when checking a change from last year.

An example

Suppose your home's estimated current market value is $300,000, but its assessed value is $250,000. In this hypothetical jurisdiction, a $25,000 exemption reduces the value taxed, and a combined annual rate of 1.6% applies to the remainder. Assume there are no tax credits or additional charges.

ItemAmount
Estimated current market value$300,000
Assessed value$250,000
Value-reducing exemption$25,000
Taxable value$225,000
Combined annual tax rate1.6%
Annual property tax$3,600
Monthly amount to reserve$300

The taxable value is $250,000 − $25,000 = $225,000, and $225,000 × 0.016 = $3,600. Dividing by 12 gives a $300 monthly reserve, whether you build that reserve yourself or fund the tax through mortgage escrow.

Why it matters

Property tax is part of the ongoing cost of owning a home, not just a cost of borrowing to buy it. Comparing the latest tax bill with last year's helps you separate a tax increase from changes in insurance or escrow catch-up amounts. It also prevents you from counting property tax twice when it is already included in your mortgage payment.

A monthly average helps with budgeting, but payment dates still matter. If a large installment is due before your monthly contributions build enough savings, the annual average alone will not cover the timing gap. Check both the year's total and the money needed by the next deadline.

Property tax versus escrow

Property tax is the amount owed to taxing authorities, while escrow is an account your mortgage servicer uses to collect money and pay bills such as property tax and homeowners insurance. Escrow spreads the funding across mortgage payments; it does not set the assessment or tax rates.

An escrow shortage can add a catch-up amount to your mortgage payment alongside a higher ongoing allowance for taxes. That is why a payment increase need not equal the annual tax increase divided by 12.

Common questions

Why isn't assessed value the same as market value? Fair market value estimates what a property would sell for under ordinary market conditions on a particular date. An assessment follows local tax rules and a specified valuation date, which may involve assessment ratios or limits on increases. Exemptions can reduce the taxable value further, so neither the assessed value nor the taxable value is automatically today's likely sale price.

Can property tax rise with a fixed-rate mortgage? Yes. A fixed mortgage interest rate does not freeze property taxes. If your mortgage payment includes tax escrow, a changed tax bill can affect the total payment even though the loan's interest rate stays the same.

Do I still owe property tax after paying off my mortgage? Paying off a mortgage does not by itself end property tax. If your servicer previously paid the bill from escrow, confirm who will pay the next bill and when, rather than assuming the final loan payment also settles future taxes.

How much should I save each month for property tax? Divide the expected annual bill by 12 for an ongoing monthly reserve. If the next payment is approaching and your reserve is short, divide the remaining amount needed by the number of contributions you can make before that payment is due.

Go deeper