Williamson County
Property Tax Protest

Meet Your Central Texas Team

Nicole’s Central Texas team serves Williamson County with the same deep expertise they bring to Travis County. Justin Dean (10 years at McLennan CAD) and Jacob Perschke (4 years at McLennan CAD as commercial appraiser) provide appraisal district insider perspective, while Nicole’s real estate background ensures every case is built on solid market evidence.

What Williamson Central Appraisal District Gets Wrong

WCAD uses mass appraisal models to value every property in the county. These models are designed for efficiency, not accuracy at the individual property level. Here’s where they consistently fall short:

Why Resolute, We’re Not an Algorithm

Williamson County is a secondary market for most protest firms. Resolute’s dedicated Central Texas team treats every Williamson County property with the same individual analysis we bring to Travis County, no shortcuts, no mass-processing.

1. We analyze your property individually using proprietary data and technology. Our agents build a case specific to your home and your neighborhood. No mass-processing. No cookie-cutter approaches.

2. We file all the paperwork with WCAD and schedule your hearing. You don’t touch a single form.

3. We show up for you meeting with the district on your behalf, presenting your case, and fighting for the highest reduction possible. Informal review, ARB hearing, and beyond.

4. You only pay if we save you money. No reduction, no fee. That’s our promise.

Williamson County Property Tax Rates (2025)

Williamson County property taxes are calculated by multiplying your property’s taxable value by the combined rate of all applicable taxing entities. Every property in Williamson County is subject to multiple overlapping taxing jurisdictions including the county itself, your municipality, and your school district. Additional entities such as community colleges, hospital districts, and special districts may also apply depending on your location.

The combined tax rate for most Williamson County homeowners falls approximately 1.9% to 2.4% of assessed value, depending on which entities apply to your specific property. Williamson County raised its tax rate in 2025 from approximately $0.40 to $0.413776 per $100 to fund flood recovery and infrastructure needs. While this is the county portion only, it contributes to an already rising total bill for homeowners in one of Texas’s most active real estate markets. View official Williamson County tax rates here.

How WCAD Calculates Your Assessed Value

The Williamson Central Appraisal District (WCAD) appraises all taxable property in Williamson County using a mass appraisal process. Rather than inspecting each property individually, WCAD uses statistical models to value hundreds of thousands of properties simultaneously based on comparable sales, property characteristics, and neighborhood data. Your assessed value is intended to reflect the market value of your property as of January 1 of each tax year.

Two values matter on your notice: market value and assessed value. For homesteaded properties, Texas law caps the increase in assessed value at 10% per year regardless of how much market value rises. This means a home that appreciated 20% in a given year can only see its taxable assessed value rise by 10%. Non-homesteaded properties, including investment and rental properties, carry no such cap and can be reassessed at full market value each year.

Because WCAD relies on mass appraisal models, individual property conditions, deferred maintenance, functional issues, and hyperlocal market factors are frequently missed. When your assessed value does not reflect your property’s true market value, or when comparable properties nearby are assessed lower than yours, you have grounds to protest.

Why Williamson County Assessments Keep Rising

Williamson County has been one of the fastest-growing counties in the country for several consecutive years, fueled by Austin’s overflow, major employers like Dell, Apple, and Amazon establishing presences in Round Rock and Cedar Park, and the appeal of highly rated school districts. The county adopted a rate increase for 2025 to fund flood recovery following significant storm damage, adding to the burden for homeowners already facing rising assessed values driven by sustained demand. For homesteaded properties, the 10% annual assessment cap provides some protection but does not prevent values from creeping upward year over year. For investment properties, rental properties, and commercial real estate with no homestead cap, the exposure is significantly greater. Protesting your assessed value annually is the only mechanism available to push back against this trend.

How to Pay Your Williamson County Property Taxes

Williamson County property tax bills are mailed in October each year and are due by January 31 of the following year without penalty. the Williamson County Tax Assessor-Collector administers tax collection for the county. Payments can be made in the following ways:

• Online: Pay at www.wilco.org by credit card, debit card, or eCheck.
• By mail: Send a check payable to the Williamson County Tax Assessor-Collector to the address on your tax statement.
• In person: Visit any Williamson County Tax Office location. Bring your tax statement or property account number.
• Payment plans: Williamson County offers installment payment options for qualifying homesteaded properties. Contact the Tax Assessor-Collector’s office for details.

Taxes not paid by January 31 accrue penalty and interest beginning February 1. By July 1, delinquent accounts are turned over to a delinquent tax attorney and additional collection fees apply. If you are waiting on the outcome of a protest, you are still responsible for paying your taxes by the deadline to avoid penalties. Any overpayment resulting from a successful protest will be refunded.

Williamson County 2026 Protest Calendar

Don’t Forget Your Exemptions

Exemptions and protests work together. Make sure you’ve filed for everything you qualify for:

Frequently Asked Questions