Collin County Property Tax Bills Arrive in the Fall

The Collin County Tax Assessor-Collector collects property taxes for the county and other local taxing units. Tax statements are mailed in October and are due when received.

The no-penalty deadline can change by tax year. The county property-tax page posted January 31, 2026 as the penalty cutoff for that year, so do not rely on an old bill or memory.

Payment can be online, by mail, or at county Tax Office locations. If a mortgage company escrows taxes, still check the account lookup before the deadline. A missed escrow payment can become your problem.