Property tax calculator Use this property tax calculator to estimate annual property tax from assessed value with either
a tax-rate percentage or a mill rate, compare the monthly equivalent, and convert between the
two common local-tax formats.
Assessed-value planning
This estimate is designed for budgeting and escrow planning. Actual bills can differ once
exemptions, parcel fees, reassessment caps, and local billing rules are applied.
Enter rate as
Display currency
Switch the displayed tax amounts without changing the assessed value or rate maths.
Result
$4,200.00
Estimated annual property tax on an assessed value of $350,000.00. Monthly equivalent: $350.00.
Monthly equivalent
$350.00
Effective tax rate
1.2%
Equivalent mill rate
12 mills
Tax per 1,000 assessed
$12.00
Alternate conversion
A 1.2% property-tax rate is the same as 12 mills.
How to read this estimate
This estimate uses the assessed value only. Real property-tax bills can differ because exemptions, homestead caps, parcel fees, and reassessment rules vary by jurisdiction.
How to use a property tax calculator well
Start with the assessor's current taxable or assessed value instead of the last sale price,
then confirm whether the local government quotes the levy as a percentage or as mills. That
keeps the estimate aligned with how the actual bill is usually calculated.
Property tax calculator guide: estimate annual property tax from assessed value
A property tax calculator estimates annual property tax from the assessed value of a home and the local rate used to tax that value. It is useful when you need a quick planning estimate, want to convert between a percentage tax rate and a mill rate, compare monthly escrow impact, or see how a higher assessed value changes the annual bill before you buy, refinance, or rebudget housing costs.
What this calculator is measuring
Property tax is usually charged against assessed value rather than against the owner’s mortgage balance or against the last monthly payment. The calculator starts with the assessed value you enter, then applies either a percentage tax rate or a mill rate to estimate the annual bill and its monthly equivalent.
This makes the tool useful for first-pass budgeting. If you are comparing homes, checking affordability, or reviewing an escrow estimate, the annual property-tax number matters because it is one of the recurring ownership costs that can materially change the real monthly housing total.
Tax rate versus mill rate
Local governments do not always express property tax the same way. Some quote a percentage rate such as 1.2% of assessed value, while others quote a mill rate. A mill is one dollar of tax for every 1,000 dollars of assessed value, so a mill rate and a percentage rate are simply different ways of expressing the same levy.
That is why the calculator supports both input modes. If you know the percentage rate, it can show the equivalent mill rate. If you know the mill rate, it can show the equivalent percentage. The core tax estimate remains the same once the formats are converted correctly.
Annual property tax = Assessed value x Tax rate
When the rate is entered as a percentage, divide the percentage by 100 and apply it to assessed value.
Annual property tax = Assessed value x Mill rate / 1,000
A mill rate expresses tax per 1,000 of assessed value rather than as a percentage.
1% = 10 mills
This conversion lets you move between the two common rate formats without changing the underlying tax estimate.
Assessed value is not always market value
A common source of confusion is that assessed value and market value are not always the same number. Some jurisdictions assess near market value, while others use fractional assessment systems, reassessment cycles, caps, or exemptions that make the taxable value lower or simply different from the price you paid for the property.
That is why a property tax calculator should be treated as an assessed-value tool, not as a market-value shortcut. If your local assessor values property differently from the market price, the estimate will only be as good as the assessed value you enter.
Worked example: assessed value $350,000 at 1.2%
Suppose the assessed value is $350,000 and the local property-tax rate is 1.2%. The estimated annual property tax is $4,200 because 350,000 x 0.012 = 4,200. The monthly equivalent is $350, which is often the more useful number when you are building an ownership budget.
The same rate can be expressed as 12 mills because 1.2% equals 12 per 1,000 of assessed value. That conversion is helpful when local tax notices, assessor documents, or brokerage estimates use mill rates instead of percentages.
How a property tax calculator helps with monthly budgeting
Many homeowners think about property tax as an annual bill, but monthly planning is often where the number matters most. Lenders may collect property tax through escrow, and even when they do not, the monthly equivalent is useful because it shows the recurring housing cost that sits alongside mortgage principal and interest, insurance, maintenance, and utilities.
That makes a property tax calculator useful for more than assessor math. It also works as a housing-cost planning tool, especially when you are comparing two homes with different assessments or deciding whether a quoted mortgage payment leaves enough room for taxes.
Why two similar homes can have very different property tax bills
Two houses with similar market prices can still have different property tax bills because local systems do not all assess the same way. Assessment ratios, reassessment timing, homestead rules, agricultural classifications, and special district levies can all change the taxable base or the final charge.
That is why a property tax calculator should be paired with the assessor's current value and local levy information whenever possible. It gives you a clean estimate from the numbers you have, but it does not replace the parcel-specific details that live on the actual tax record.
When to use assessed value instead of market value
Use assessed value whenever you have it. Market value is helpful when you are broadly comparing neighborhoods, but a property tax estimate is strongest when it starts from the taxable value used by the local jurisdiction. If you only have market value, the calculator can still give you a rough planning estimate, but the result becomes less precise.
The same principle applies after a purchase. A sale price can influence future assessments, but the property tax calculator is still driven by the assessed or taxable value that the local government actually applies, not by the price you hope the property is worth.
Frequently asked questions
How do I calculate property tax from assessed value?
Multiply assessed value by the tax rate. If the rate is given as a percentage, convert it to decimal form first. If it is given as a mill rate, divide the mill rate by 1,000 and multiply that by assessed value.
What is the difference between assessed value and market value?
Market value is what a property might sell for. Assessed value is the taxable value used by the local assessor or taxing authority. In some places they are close; in others, exemptions, caps, reassessment cycles, or local formulas make them different.
What is a mill rate in property tax?
A mill rate means dollars of tax per 1,000 dollars of assessed value. Ten mills is the same as a 1% property-tax rate, and twelve mills is the same as 1.2%.
Does this estimate include exemptions or special assessments?
No. This calculator estimates baseline tax from assessed value and rate only. Exemptions, parcel fees, reassessment caps, and special district charges need to be reviewed against your local bill or assessor records.
How do I convert a mill rate into a property tax percentage?
Divide the mill rate by 10 to convert it into a percentage. For example, 15 mills equals a 1.5% property-tax rate, and 22 mills equals a 2.2% rate.
Why is my actual property tax bill higher than this estimate?
Your bill may include parcel fees, school levies, special districts, exemptions with separate line items, or updated assessed values that are not reflected in the estimate. Some jurisdictions also bill on a different schedule or round differently from a simple annual estimate.
Can I use a property tax calculator for escrow planning?
Yes. The monthly equivalent is useful for escrow planning because it shows how much property tax may need to be set aside each month. It is still only an estimate, so lender escrow requirements and official tax bills should take priority.
Should I enter the home price or the assessed value?
Enter assessed value when you have it. Home price can be used as a rough fallback, but property tax is usually based on the taxable or assessed value determined by the local authority, not directly on the sale price.
