Follow the default numbers.
With market / assessed value of $350,000, the model gives estimated annual property tax: $6,300.
The formula is taxable bases × applicable millage ÷ 1,000 − approved bill credits + fixed charges. Open the breakdown to trace expenses and assumptions. Change one input at a time to see how your decision changes. This example uses scenario inputs; it is not an offer, tax bill, appraisal or legal determination.
A housing-value example for Colorado
Census QuickFacts reports a median owner-occupied home value of $539,400 for 2020–2024. This is a dated housing estimate, not a current sale-price median or a parcel assessment. The source was checked on 2026-09-30.
Suppose the county statement certifies a $35,000 school taxable base and a $30,000 other-levy base. Assumed rates of 25 and 45 mills give $875 + $1,350 = $2,225. These bases are hypothetical, not percentages prescribed for the $539,400 median home. Colorado’s school and other residential assessment treatment can differ, so copying one base to both columns can distort the estimate. An approved senior or veteran adjustment already included in a certified base must not be subtracted again.
The live model gives $2,225 under these assumptions. Local rates and any illustrative certified bases in this scenario are hypothetical. Replace them with the parcel’s matching tax-year records before budgeting a bill.
Load this example in the calculatorStart with the assessor’s taxable value
Market value, assessed value and taxable value are not interchangeable. A certified taxable-value override is the safest input when you have the current parcel record. Without it, the calculator applies the selected state’s simplified assessment model to the entered value. School and other millage are applied separately where exemptions differ. A mill is one dollar per thousand dollars of taxable value.
A county is not one tax district
School, city, special-district and bond levies can differ within the same county. The county selector identifies the jurisdiction; it does not imply a single county-wide bill rate. The sample millages are clearly labeled assumptions. Replace them with the effective levies for the parcel and tax year, then add non-ad-valorem charges separately.
A purchase can reset the assessment
Existing-owner assessment caps may not transfer to a buyer. Michigan taxable value can uncap after a transfer; California can re-establish a base value; Florida’s Save Our Homes benefit has transfer and portability conditions. Select a reassessment reset when modeling a new purchase unless the assessor confirms another treatment. A seller’s current bill can substantially understate the buyer’s tax expense.
Tax relief needs eligibility
Homestead status, age, disability and veteran exemptions depend on state and local rules. Only the basic modeled homestead treatment is automatic. Other exemptions are a manually confirmed taxable-value adjustment. Credits, levy-specific deductions, tax freezes and appeal relief can require a different calculation. The state notes and official source links explain what to check before using the result in a rental or net sheet.
Keep your assumptions with the result
Save the calculation to your deal file to reuse compatible inputs in another tool. The file stays in this browser on this device. Download the CSV to open the complete inputs, results and schedule in Excel or Google Sheets. Use PDF to print the report or save it as a PDF. A share link includes entered financial figures in its URL, so use it only with people you intend to share those numbers with.