About the Property Tax Calculator
Property tax is one of the most overlooked costs of homeownership when budgeting for a purchase, since it's billed separately from the mortgage in many places and varies enormously by location. Our Property Tax Calculator estimates your annual and monthly bill from your home's assessed value and local tax rate.
How It Works
The calculator multiplies your home's assessed value by your local property tax rate (often called a mill rate, expressed here as a percentage) to find your annual property tax bill, then divides by 12 for a monthly equivalent - useful for budgeting alongside a mortgage payment.
Formula & Methodology
Local governments set a tax rate (sometimes expressed as a percentage, sometimes as a 'mill rate' - dollars per $1,000 of assessed value) high enough to fund the budget they need from property taxes, then apply it uniformly across the local property tax base. Assessed value is a local government's own valuation of a property for tax purposes and frequently differs from actual market value, sometimes significantly, depending on how recently and how the jurisdiction conducts reassessments.
Step-by-Step: Calculating It By Hand
- 1Find your property's assessed value from your local tax assessor (not necessarily the same as market value).
- 2Find your local property tax rate, ideally your specific county or municipal rate rather than a broader state average.
- 3Multiply assessed value by the tax rate to find the annual property tax bill.
- 4Divide by 12 for a monthly equivalent, useful for budgeting alongside a mortgage payment.
Examples
Typical rate
A $350,000 assessed home value at a 1.1% tax rate comes to $3,850/year, or about $321/month.
Higher-tax area
The same home value at a 2.2% rate (common in some high-tax states and municipalities) doubles the annual bill to $7,700 - a significant budgeting difference.
Advantages
- Shows both annual and monthly figures for easier budgeting alongside a mortgage
- Works for any assessed value and local tax rate combination
- Highlights how much property tax rates vary by location
- Useful for comparing tax burden across different areas before buying
Common Mistakes
- Confusing assessed value with market value - many jurisdictions assess below full market value
- Using a state's average rate instead of your specific county or municipality's actual rate
- Forgetting property tax rates and assessed values can both increase over time
- Not budgeting for property tax separately when it's not escrowed into the mortgage payment
Edge Cases to Watch For
- Assessed value often lags behind market value, especially in fast-appreciating markets, meaning a home's real market value can be well above what's currently taxed.
- Many jurisdictions offer exemptions (homestead, senior, veteran) that reduce the taxable assessed value below the property's full assessed value.
- Property tax rates and assessments can both change over time, so a rate used for a purchase decision should be periodically reconfirmed.
- A property tax bill not escrowed into a mortgage payment is typically billed separately once or twice a year, requiring separate budgeting outside the mortgage payment itself.
Common Use Cases
- Budgeting for property tax as part of total homeownership cost
- Comparing property tax burden across different areas before buying
- Estimating the monthly equivalent for mortgage budgeting purposes
- Sanity-checking a property tax bill against the assessed value