What this calculator does
Estimate annual and periodic property tax from assessed value, exemptions, and either a percent rate or millage rate.
How it works
The calculator evaluates taxable value = max(assessed value − exemptions, 0); tax = taxable value × rate. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?assessedValue=Assessed property valueMoney · Required · Default: 450,000
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?exemptions=Taxable-value exemptionsMoney · Required · Default: 50,000
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?rateType=Tax-rate formatChoice · Required · Default: percent · Accepted values: percent, mills
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?taxRate=Tax rateNumber · Required · Default: 1.25
Outputs
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annualPropertyTaxEstimated annual property taxCurrency · Primary output
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monthlyEquivalentMonthly equivalentCurrency
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quarterlyEquivalentQuarterly equivalentCurrency
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taxableAssessedValueTaxable assessed valueCurrency
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effectiveRateEffective rate on assessed valuePercentage
Inputs and results
The inputs are Assessed property value, Taxable-value exemptions, Tax-rate format, Tax rate. Results include Estimated annual property tax, Monthly equivalent, Quarterly equivalent, Taxable assessed value, Effective rate on assessed value.
Important notes
This is an estimate, not an official tax bill. Verify current assessments, rates, and exemptions with the local taxing authority.