Lower your Williamson County property taxes
Williamson County grew fast, and so did its values. WCAD's informal reviews happen on hearing day and are capped at 15 minutes, so the evidence has to be ready before you walk in. We prepare it from nearby sales and similar homes, and protest when you're overpaying. 25% of first-year savings, only if you save.
What a too-high value costs you
If your home is assessed at $420,000 but similar homes point to about $390,000, you're taxed on $30,000 too much. At a 1.77% rate that's about $531 a year. Our fee would be $133; you'd keep $398.
What gets missed in Williamson County
- Fast-growth areas. New subdivisions and builder sales can push values above what resales support.
- Unequal appraisal. Similar homes on your street can be valued lower than yours. Texas lets you protest that directly.
- Short informal reviews. Informal reviews are capped at 15 minutes on hearing day. A clear, organized packet makes the difference.
- Condition. Foundation movement, roof wear and dated finishes rarely show up in district records unless you prove them.
Insider tip: WCAD's online protest portal accepts market-value protests and closes at 11:59 PM on the deadline. Video hearings must be requested ahead of time, and evidence goes in by affidavit.
Reviewed by the founder
Julien reviews every Williamson County case personally and tells you the value we’ll ask for before anything is filed.
Get my free reviewWilliamson County calendar
| January 1 | Valuation date |
| April | WCAD mails notices of appraised value |
| May 17, 2027 | Protest deadline (May 15 falls on a Saturday), or 30 days after your notice if later |
| Spring – summer | Informal review on hearing day, then Appraisal Review Board hearings (in person, video or phone) |
| July 25 | Appraisal roll certified |
| After the ARB order | 60 days to request binding arbitration or appeal to court |
| October / January | Tax bills mailed / taxes due by the end of January |
*City of Round Rock 2025 figures. Combined rate: City of Round Rock, Round Rock ISD, Williamson County and Austin Community College, approximate; road and flood taxes not included.
Sources: Williamson Central Appraisal District · WCAD 2026 protest process · City of Round Rock property taxes · Texas Comptroller — protest guide. Dates are checked each year; confirm with the county for your property.
Exemptions to check
Your homestead exemption takes $140,000 off your home's value for school taxes ($200,000 if you're 65+ or disabled), and caps how much your taxable value can rise each year at 10%. Over-65 and disabled owners also get a school-tax ceiling. We check your exemptions free at sign-up.
Williamson County questions
How do I protest with WCAD?
Through WCAD's online protest portal using the Quick Ref ID and passcode on your notice, or let us file for you with Form 50-162.
Do I have to attend in person?
No. WCAD offers video and phone hearings; you submit evidence by affidavit ahead of time.
Can protesting raise my value?
No. The Appraisal Review Board can't set your value higher than what's in the district's records.