The Texas property tax protest deadline for 2026 is May 15, 2026 — just 35 days away. Texas homeowners have until this date to formally challenge their property's assessed value with their local appraisal district.
Missing this deadline means accepting your current assessment and paying potentially thousands more in property taxes. Key Facts: Texas law requires all property tax protests to be filed by May 15 (or the next business day if May 15 falls on a weekend).
Late filings are only accepted in very limited circumstances involving military deployment or other extraordinary situations. Why May 15 Matters for Your Property Taxes Property tax bills in Texas are calculated using your home's assessed value as of January 1, 2026.