If you don't protest your property tax assessment in Texas, you accept the appraised value set by your county appraisal district. This means you'll pay property taxes based on that assessment for the entire tax year, even if you believe your home is overvalued.
Once the protest deadline passes—typically May 15th—your options become extremely limited. Immediate Consequences of Missing the Protest Deadline When you don't file a protest by the deadline, several things happen automatically: Your assessed value becomes final: The appraisal district's valuation stands without challenge Tax bills are calculated: Your property taxes are computed using the uncontested assessment Payment becomes due: You must pay the full tax amount by January 31st to avoid penalties No mid-year adjustments: The assessment remains locked until the next tax year Texas Property Tax Fact: The average successful protest in Harris County reduces assessed values by $15,000-$25,000, saving homeowners $300-$600 annually in taxes.
Financial Impact Over Time Missing protest deadlines creates a compounding effect on your tax burden: Year One Impact If your home is overassessed by $20,000 and your total tax rate is 2.5%, you'll pay an extra $500 in taxes immediately.