Your property tax bill can rise when the assessor's model values your home higher, when local tax rates climb, or when both happen in the same year.
Your property tax bill went up this year because the assessor's model produced a higher value for your home this cycle, local tax rates rose to fund local budgets, or both at once. Assessments and millage rates move on separate tracks, and either one can push your bill higher.
Why did the assessor's model value my home higher?
The county assessor uses a statistical model that weighs many variables to estimate every home's value at once. When that output lands higher than last year, the taxable value on your bill climbs with it. The model is reasonable in aggregate but can miss at the individual property level. Your bill is calculated on that assessed value, so a higher number means a larger bill even before tax rates enter the picture.
Why did local tax rates go up?
Tax rates, often called millage, are set by the local bodies that fund schools, roads, libraries, and emergency services. When those budgets grow, or when voters approve new levies, millage rises and every property tax bill in the district goes up with it. This is separate from what the assessor does. Rates can climb in a year your assessed value held flat, and both can move in the same year.
What does this mean for you?
Both drivers are normal. What is not normal is when the assessor's figure lands out of line with what similar homes on your street would sell for today. If your new number feels off for your neighborhood, the assessment side of the equation may be worth a closer look. Fair Appeal reviews your home against its comparables and only files a property tax appeal if it makes sense. No fee unless the appeal wins.