Complete guide to protesting your Harris County property taxes in 2027. Learn HCAD deadlines, how to build a comparable sales case, and what the county records actually show about outcomes.
The Harris County Appraisal District is one of the largest appraisal districts in the country, responsible for valuing over 1.8 million parcels. HCAD uses a computer-assisted mass appraisal (CAMA) system that estimates value using statistical models — applying broad market trends to entire neighborhoods rather than assessing each home individually. This approach is fast and scalable, but inherently imprecise. Your home gets grouped with comparable properties in your area and a value is assigned based on average market trends. If your home has issues the model can't see — foundation problems, outdated systems, an unusual floor plan, backing to a commercial property or busy road — your assessment will be inflated.
Missing the protest deadline means waiting a full year to challenge your assessment. Texas Tax Code § 41.44 sets the protest deadline as the later of May 17, 2027 OR 30 days after HCAD mailed your Notice of Appraised Value. HCAD typically mails notices in April. Check the date on your notice — your personal deadline may be later than May 15.
Texas Tax Code gives you two distinct arguments to make in your protest, and the strongest cases use both.
The informal hearing is your first opportunity to present evidence directly to an HCAD appraiser. This is where the majority of protests are resolved. The most effective evidence is comparable sales data — recent sales of homes similar to yours that sold for less than your assessed value.
Most Harris County property tax protest companies charge 25–50% of your first-year savings as a contingency fee. On a $2,000 reduction, that's $500–$1,000 in fees — every single year. TaxAppeal charges a flat $89, and we check first: if a protest won't lower your bill after your exemptions and the homestead cap, we tell you and don't sell you one. If it will, we mail you a ready-to-sign kit — Comptroller Form 50-132 filled in, an equal-and-uniform comparison from HCAD's own roll, a checklist and a return envelope addressed to HCAD. You sign it and mail it. You keep 100% of your savings.
We check first. If an appeal will lower your bill, we mail you a ready-to-sign kit for $89 flat. You sign it and mail it, and you keep 100% of your savings.
TaxAppeal USA is a self-service document-preparation service. We prepare a ready-to-sign appeal kit and mail it to you; you sign it and mail it to the county yourself. In every state we serve, including Florida, we are not property tax consultants, agents, or representatives, we do not provide tax or legal advice, and we do not file appeals or represent customers before any appraisal district, board of assessors, board of equalization, value adjustment board, or review board. Every appeal, protest and petition is prepared for the property owner, signed by the owner, and mailed by the owner in the owner’s name. In Florida your petition is signed by you as the property owner under section 194.011(3), Florida Statutes, and the county’s Value Adjustment Board filing fee is paid by you directly to the county. TaxAppeal USA does not sign as your representative, does not appear before the Board, and does not present evidence or argument at a hearing.