Yeah, that's how the state law is set up. Every county is. required to do a reappraisal every so many years, so each property is reappraised. Once this is done, the tax assessors office sets a new certified tax rate that will bring in the exact same amount of money as the previous tax rate did. Often times, (every time in my county) the city and county commissioners sets a tax rate higher than that and a tax hike is born. The tax assessors office usually sets the appraisal lower than the property is worth, so you'd be talking to the wind to get it lowered if you were one of the lucky few that had their tax appraisal set higher than the average. It's a pretty devious plan they have going.