Williamson County Property Tax Guide 2026

The deadline to file a property tax protest in Williamson County is May 15 or 30 days after your Notice of Appraised Value is mailed, whichever is later. You can file online at https://www.wcad.org, by mail, or in person at the WCAD office. Don't wait until the last day — filing early gives you more scheduling flexibility for your hearing.

Visit the WCAD website at https://www.wcad.org and use the property search tool. You can look up your property by address, owner name, or account number. The property record will show your current appraised value, exemptions, and property details.

File Form 50-114 with WCAD. You must own and occupy the property as your primary residence as of January 1. The deadline is April 30, but late applications are accepted until January 31 of the following year. A homestead exemption reduces your school district taxable value by $100,000, and you qualify for the 10% annual appraisal cap.

The strongest evidence includes: (1) comparable property sales within 1 mile that sold for less than your appraised value, (2) photos showing condition issues like foundation cracks, roof damage, or outdated interiors, (3) your property's per-square-foot value compared to neighbors (for unequal appraisal arguments), and (4) any errors in your property record (wrong square footage, room count, etc.).

At the Appraisal Review Board hearing, you present your evidence to an independent panel. First, you'll have an informal meeting with a WCAD appraiser who may offer a settlement. If you don't agree, you proceed to the formal hearing where panel members review both sides and make a binding decision. The process typically takes 15-30 minutes.

Yes. Texas law gives you the right to protest your property's appraised value every year, even if you protested last year. Appraisal districts reassess all properties annually, so last year's reduction doesn't carry forward — you should review your new value each year and protest if it seems too high.

Austin-area home values peaked in 2022-2023 and have since declined in many neighborhoods. However, appraisal districts may lag behind market corrections. If recent comparable sales in Round Rock show prices below your appraised value, that's strong evidence for a protest. Bring MLS data or recent closings from within your neighborhood.

You can pay Williamson County property taxes online, by mail, or in person at the Tax Office. Online payments typically accept credit card (with a convenience fee) and eCheck. The payment deadline is January 31 — after that, penalties and interest begin accruing at approximately 7% in February and increase monthly. If you need more time, ask about installment payment plans.

Beyond the standard homestead exemption, Williamson County homeowners may qualify for: (1) Over-65 exemption — an additional $10,000 off school taxes plus a tax ceiling that freezes your school tax amount, (2) Disabled person exemption — similar benefits to over-65, (3) Disabled veteran exemption — partial to full exemption based on disability rating, and (4) Agricultural (ag) exemption for qualifying rural properties. Apply through WCAD.