What Is Millage Rate
A millage rate is the amount of tax charged per $1,000 of assessed property value. It's expressed in mills, where one mill equals $0.001. If your property is assessed at $300,000 and the millage rate is 25 mills, your annual property tax bill is $7,500 ($300,000 × 0.025).
The millage rate itself is set by your local taxing authority, county commission, or school district and is applied uniformly across all properties in that jurisdiction. However, what varies significantly is the assessed value on which that rate is applied, which is where assessment appeals come into play.
Millage Rate vs. Your Assessment
This distinction matters for your appeal strategy. The millage rate is fixed for everyone in your district. You cannot challenge it in a board of review hearing. What you can challenge is the assessed value of your property.
Many homeowners confuse a high tax bill with an unfair millage rate when the real problem is an inflated assessed value. If your neighbor's identical home was assessed at $250,000 but yours is at $320,000, the millage rate is not the issue. The assessor's valuation is.
Assessment Ratio and the Full Calculation
Some jurisdictions assess properties at 100% of market value. Others use lower percentages like 85% or 50%. This is the assessment ratio. When you see a millage rate of 25 mills in a county with an 85% assessment ratio, the effective rate on market value is closer to 21.25 mills.
Before filing an appeal, find out your state's required assessment ratio. It's public information available from your county assessor's office. Use this ratio to reverse-engineer whether your property's assessed value is reasonable by comparing it to comparable sales in your area that have been assessed recently.
Using Millage Rate Data in Appeals
Millage rates are useful reference points during a board of review hearing or appraisal challenge. If your assessed value seems high, request the average assessed values for comparable properties in your neighborhood. Divide those by the millage rate applied to them, then multiply by the assessment ratio. This shows whether your property was assessed consistently with similar homes.
Counties often publish annual millage rate schedules by district, property class, and tax year. Request these records when preparing your appeal. They help establish that the millage rate itself is consistent, isolating the problem to your specific assessment.
Common Questions
- Can I appeal the millage rate if I think it's too high? No. Millage rates are set by elected bodies and apply uniformly. You can appeal your assessed value if you believe it exceeds fair market value for comparable properties.
- Does the millage rate change every year? It can. Some districts adjust millage rates annually based on budget needs. Check your county's tax assessor website or contact them directly to see historical rates and understand trends.
- How does the assessment ratio affect what I owe? If your state requires 85% assessment and your home's market value is $400,000, your assessed value should be $340,000. If the millage rate is 20 mills, you owe $6,800. If the assessor instead used 100% of value, you'd owe $8,000. Always verify the ratio being used in your jurisdiction.