Williamson County Property Tax Protest Timeline and Key Dates

If you own property in Williamson County, Texas, understanding the property tax protest timeline is critical. Each year, property owners have a limited window to challenge their appraised value through the Williamson County Appraisal District (WCAD). Missing key dates can mean paying more in property taxes than necessary.

This guide explains:

• The Williamson County property tax protest deadline
• When appraisal notices are mailed
• A clear protest timeline from start to finish
• What happens if you miss the deadline
• How to protect your right to appeal

For a complete overview of the process and professional help options, see our Williamson County property tax protest guide.

What Is the Williamson County Property Tax Protest Deadline?

The Williamson County property tax protest deadline is set by Texas law and administered by WCAD.

For most properties, the deadline is:

• May 15, or
• 30 days after the Notice of Appraised Value is mailed,
  whichever is later.

If May 15 falls on a weekend or holiday, the deadline moves to the next business day.

Failing to file by the deadline generally means you lose your right to protest your property’s value for that tax year.

When Does Williamson County Mail Appraisal Notices?

WCAD typically mails Notices of Appraised Value between late March and April.

Your notice includes:

• The proposed market value of your property
• The assessed value used for taxation
• A PIN or passcode for online filing
• Instructions on how to file a protest

Even if you do not receive a notice, you are still responsible for knowing and meeting the protest deadline.

Williamson County Property Tax Protest Timeline

Below is a typical Williamson County property tax protest timeline for residential properties.

January 1

• Valuation date
• Property value is based on market conditions as of this date

March to April

• WCAD mails Notices of Appraised Value
• Online protest filing becomes available

April to May 15

• Property owners file protests
• Evidence preparation begins
• Informal reviews may be scheduled

May to July

• WCAD conducts informal reviews
• Appraisal Review Board (ARB) hearings are scheduled if needed

Summer

• Final appraised values are issued
• Property tax bills are calculated later in the year

Filing earlier in this timeline gives you more flexibility and time to prepare strong evidence.

How to File a Property Tax Protest in Williamson County Before the Deadline

Most homeowners file their protest online through WCAD, which is the fastest and most reliable option.

To file online, you will need:

• Your WCAD property account number
• The PIN or passcode from your appraisal notice
• A selected protest reason, such as market value or unequal appraisal

Online filing provides immediate confirmation that your protest has been received and allows for easier evidence uploads.

You can review official filing instructions on the Williamson County Appraisal District (WCAD) website.

What Happens If You Miss the Williamson County Protest Deadline?

If you miss the deadline:

• Your protest may be dismissed
• You may be locked into the proposed appraised value for the year
• Your property taxes will be based on the unchallenged value

Late protests are rarely allowed and are typically harder to win. Filing on time is the most important step in the protest process.

Should You File Early or Wait Until the Deadline?

Filing early is almost always the better strategy in Williamson County.

Benefits of filing early include:

• Less congestion in WCAD online systems
• More time to gather strong comparable sales and evidence
• Better access to informal review negotiations
• Reduced risk of technical or filing errors

Waiting until the last few days increases the risk of mistakes and missed opportunities.

How Williamson County Fits Into the Texas Property Tax Protest Process

While Williamson County follows Texas property tax law, procedures and timelines can vary by county.

For a statewide explanation of deadlines, filing rules, evidence requirements, and hearings, see our Texas property tax protest process guide.

Get Help With Your Williamson County Property Tax Protest

Understanding the timeline is only the first step. Evidence quality, negotiation strategy, and familiarity with WCAD procedures play a major role in results.

If you want help managing deadlines, preparing evidence, and handling WCAD negotiations, professional representation can simplify the process.

Learn more about your options in our Williamson County property tax protest guide, or get started today with Ballard Property Tax Protest.