Search, verify and pay a Williamson County tax bill without using stale office information
Williamson County changed both its Tax Assessor-Collector and its Georgetown office location in 2026. Catherine Totty now serves as Tax Assessor-Collector, and the Georgetown office is at 1848 Texas Trail—not the former 904 S. Main Street address still found on older notices and archived pages.
Use this guide for the official property search, 2026 payment deadline, current fees, Georgetown, Round Rock, Cedar Park and Taylor offices, installment options, delinquent taxes and the important split between the Tax Office and Williamson Central Appraisal District.
What does the Williamson County Tax Assessor-Collector do?
The Williamson County Tax Assessor-Collector collects property taxes for Williamson County and multiple other taxing jurisdictions. The office is where you go for a tax bill, payment, receipt, current or delinquent balance, payment arrangement questions and certain tax certificates.
Property-tax bills, online payment, receipts, posting questions, partial payments, qualifying installment plans, delinquent-tax help, tax certificates and many motor-vehicle transactions.
Appraised value, exemptions, owner or mailing-address corrections, taxable-property records, homestead filings and appraisal protests.
The Tax Assessor-Collector does not set the tax rates. The governing bodies of the county, cities, school districts and other taxing units adopt their own rates.
How to search and pay Williamson County property taxes online
The County’s official property system is at Tax.WilcoTX.gov. It lets taxpayers search by owner name, property address or account number, view statements and payment history, print receipts and pay eligible balances.
Use Tax.WilcoTX.gov rather than a third-party public-record directory. The portal identifies itself as Williamson County Tax Assessor Collector.
Use the property account/Quick Ref information from the bill when available. Otherwise search by owner name or street address.
Check the owner, situs/property address, account number, tax year and taxing entities. Similar owner names can return more than one property.
A current-year payment does not automatically clear an older delinquent year, personal-property account or another property owned under the same name.
Online e-check currently has no vendor convenience fee. Credit/debit card transactions currently carry a 2.15% fee with a $2.50 minimum.
Keep the payment confirmation until the portal shows the payment correctly. Online payments can take time to appear in the account history.
Property-tax search, statements, receipts and payment history
The county portal is useful even when you are not ready to pay. Current and prior statements, receipts and account history can help with mortgage escrow research, refinancing, closing records and checking whether a payment was actually posted.
Useful when you know the taxpayer but not the account number. Always match the physical property because common names can produce multiple records.
Useful for a specific home or parcel. For Round Rock addresses, verify the county because the city extends into Travis County.
Usually the cleanest route when you have a tax statement or prior receipt. Check the tax year before paying.
Williamson County 2026 property-tax dates
As of September 15, 2026, the new 2026 bill has not yet reached its normal mailing window. Williamson County says 2026 statements will be mailed the week of October 20.
How Williamson County accepts property-tax payments
| Method | Current published cost | What to know |
|---|---|---|
| Online e-check | No vendor convenience fee | Verify routing/account information carefully and save the confirmation. |
| Credit/debit card | 2.15%, $2.50 minimum | Large property-tax charges may hit card or bank transaction limits. |
| Cash | No card vendor fee | Use an appropriate Tax Office counter. Never place cash in a drop box. |
| Check / money order | No card vendor fee | Current County pages direct checks and money orders to the Williamson County Tax Office / Catherine Totty. |
| Drop box | No card vendor fee | Use check or money order. Do not leave cash or credit-card information. |
| Bank bill pay | Depends on bank | Some banks produce a paper check; schedule early enough to satisfy the tax deadline. |
Mail early if you are paying close to January 31
Williamson County specifically warns that putting an envelope into a personal mailbox, community mailbox or USPS collection box does not guarantee that day’s postmark. A late postmark can turn an otherwise timely-intended payment into a delinquent payment.
Near January 31, the County recommends requesting a postmark at a USPS retail counter or obtaining a Certificate of Mailing.
An office or commercial postal-meter stamp is not the same as the required USPS postmark for statutory timely-payment purposes.
Georgetown, Round Rock, Cedar Park and Taylor Tax Offices
Williamson County lists the same general public Tax Office hours across its four current locations: Monday 8:00 a.m.-5:30 p.m. and Tuesday-Friday 8:00 a.m.-4:00 p.m., excluding holidays. Live wait times and appointments are published separately.
MAIN
Georgetown Tax Office
Address: 1848 Texas Trail, Georgetown, TX 78626
Phone: 512-943-1601
Drive-through: Available for property-tax payments, registration renewals and disability placards when required forms are completed.
Drop box: Inside the Administration Building to the right of the entrance.
Best for: General property-tax help plus Georgetown-only services such as tax certificates.
ROCK
Round Rock Tax Office
Address: 1801 E Old Settlers Boulevard, Suite 115, Round Rock, TX 78664
Drive-through: Limited to registration renewals, disability placards and property-tax payments.
Drop box: Outside the office’s main door.
County check: Verify a Round Rock parcel is actually in Williamson County before using this tax system.
PARK
Cedar Park Tax Office
Address: 350 Discovery Boulevard, Suite 101, Cedar Park, TX 78613
Drive-through: Limited to registration renewals, disability placards and property-tax payments.
Drop box: Outside near the main entrance.
Taylor Tax Office
Address: 412 Vance Street, Suite 1, Taylor, TX 76574
Drop box: Outside the office’s main door.
Best for: Eastern Williamson County taxpayers who do not need a Georgetown-only service.
Partial payments, monthly prepayments and quarter installments
Williamson County offers several different payment approaches. They are not interchangeable, and each is designed for a different stage of the tax cycle.
The current 2026 property-tax page encourages taxpayers who cannot pay the full balance by January 31 to pay as much as possible. Penalty and interest still apply to the unpaid balance after delinquency.
Automatic deposits toward future taxes are available when current and prior taxes are not outstanding. The County’s plan runs through September and requires annual re-enrollment.
Qualifying homesteads with an Over-65, Disabled Person or Disabled Veteran exemption can use the statutory four-payment route.
Quarter-payment schedule
| Installment | Due date | Practical note |
|---|---|---|
| 1st | January 31 | Start the qualifying plan on time to avoid normal February delinquency treatment. |
| 2nd | March 31 | Confirm the first installment posted before assuming the plan remains current. |
| 3rd | May 31 | Keep each confirmation because late installment rules differ from a normal full-year account. |
| 4th | July 31 | Final scheduled installment for the qualifying plan. |
What happens after a Williamson County tax balance becomes delinquent?
The current County page says 2026 property taxes become delinquent February 1, 2027 and begin with a combined 7% penalty and interest. Texas statutory penalty and interest increase over time, so use the live County balance rather than calculating a payoff from an old statement.
The standard first delinquent month combines a 6% statutory penalty and 1% interest, for an initial 7% addition.
For a standard delinquent bill, penalty reaches 12% by July and statutory interest continues to grow monthly. Collection costs may also become relevant.
Texas law can permit an additional collection penalty when delinquent taxes are turned over to contracted attorneys after the required statutory notice/timing.
Williamson County Tax Office vs Williamson Central Appraisal District
The two systems work with the same property-tax process but perform different legal jobs. WCAD is not a department of Williamson County government or the Tax Assessor-Collector.
| Your question | Correct office | Why |
|---|---|---|
| How much do I owe? | Tax Assessor-Collector | The Tax Office collects the billed tax and maintains the payment account. |
| Did my payment post? | Tax Assessor-Collector | Statements, receipts and payment history are collection records. |
| Why is my appraised value high? | WCAD | The appraisal district determines property value. |
| Where is my homestead exemption? | WCAD | The appraisal district receives and processes exemption applications. |
| Owner or mailing address is wrong | WCAD | Ownership/address data are appraisal-record issues. |
| I want to protest the appraisal | WCAD / ARB process | A tax-payment counter cannot change the appraised value. |
| I need a tax receipt | Tax Assessor-Collector | The tax portal stores statements, payment history and receipts. |
Mortgage company, missing bill or recently purchased home?
Check the County property account and compare it with the mortgage servicer’s actual tax disbursement. Monthly escrow collection is not proof that the County has received the payment.
The County notes that proper notification may not have reached the mortgage company’s tax service. Contact the lender before making a possible duplicate payment.
Compare closing-proration documents with the live WCAD and Tax Office records. The January 1 ownership rule and later closing adjustments can create confusing statements.
Have the property/account ID, tax year, amount, transaction or check number, payment date and bank proof ready when contacting the Tax Office.
Williamson County tax certificate vs a tax lien certificate
These phrases sound similar but mean different things in Texas. Williamson County offers official property-tax certificates, but Texas does not sell tax-lien certificates the way some other states do.
The Williamson County Tax Office currently charges $10 per tax certificate. In-person requests are handled through the Georgetown office at 1848 Texas Trail, and the County also provides an online request route.
Texas does not use a tax-lien-certificate sale system for delinquent real estate. Delinquent liens are enforced through the Texas judicial foreclosure and tax-sale process.
How Williamson County delinquent tax sales work
Williamson County says delinquent tax sales are conducted periodically through its delinquent-tax attorneys. They are judicial foreclosure sales under Texas law, not certificate auctions.
The County says tax sales may occur on the first Tuesday of a month, but taxpayers and bidders should confirm the actual next sale rather than assuming one is scheduled.
When a sale is scheduled, the delinquent-tax attorney publishes properties, minimum bids and bidding information in advance.
The County currently identifies the northeast side of the Williamson County Justice Center Annex at 4th and Martin Luther King for tax-sale proceedings.
Do not treat a minimum bid as market value, clear title or a guaranteed investment. Research title, redemption, occupancy, access and legal conditions separately.
The same office also handles many Texas motor-vehicle transactions
Williamson County’s Tax Assessor-Collector has a broader role than property-tax collection. Residents also use these offices for titles, registrations, disabled placards and other TxDMV-related transactions.
Available through multiple Tax Office routes. Cedar Park, Georgetown and Round Rock list limited drive-through availability for renewals.
Title transfers and related ownership transactions can require documents that have nothing to do with your property-tax account.
Limited drive-through service is available at specified branches when all required forms are completed before entering the lane.
Common Williamson County property-tax problems
Use 1848 Texas Trail for the current Georgetown Tax Office. The former 904 S. Main address can still appear in older county documents and search results.
Catherine Totty is the current Tax Assessor-Collector. Archived 2025 and early-2026 material can still display Larry Gaddes.
Confirm whether the parcel falls in Travis County. City boundaries and county boundaries are not the same thing.
Do not try to fix valuation through the payment system. Use WCAD and preserve the applicable appraisal-protest deadline.
Paying part of the balance can reduce what remains subject to penalty and interest, but it does not extend the normal delinquency date.
Use a method that gives reliable timing evidence. Do not assume a bank bill-pay check or mailbox deposit receives the date you intended.
Official Williamson County and Texas property-tax links
Live balances, processor fees, office closures, wait times, tax-sale schedules and account-specific penalty figures can change. Use the official source when you are ready to act.
Williamson County Tax Assessor-Collector FAQs
Who is the current Williamson County Tax Assessor-Collector?
Catherine Totty began serving as Williamson County Tax Assessor-Collector on July 21, 2026 after appointment by the Williamson County Commissioners Court. Older pages may still show former officeholder Larry Gaddes.
How do I pay Williamson County property taxes online?
Use the official Tax.WilcoTX.gov property system. Search by owner name, property address or account number, confirm the correct property and tax year, select the balance, review the payment method and fee, then save the confirmation and receipt.
Where is the Williamson County Georgetown Tax Office now?
The current Georgetown Tax Office is at 1848 Texas Trail, Georgetown, TX 78626. It moved there in 2026, so the former 904 S. Main Street address on old notices should not be relied on.
What are Williamson County Tax Office hours?
Current general public hours are Monday from 8:00 a.m. to 5:30 p.m. and Tuesday through Friday from 8:00 a.m. to 4:00 p.m., excluding holidays and temporary closures.
When are 2026 Williamson County property taxes due?
Williamson County says 2026 tax statements will be mailed the week of October 20, 2026. Taxes must be paid in full on or before January 31, 2027 to avoid penalty and interest. Outstanding balances become delinquent February 1, 2027.
What are Williamson County online property-tax payment fees?
Online e-check payments currently have no vendor convenience fee. Current credit/debit card transactions carry a 2.15% convenience fee with a $2.50 minimum. Verify the fee on the live payment screen.
Can I make a partial Williamson County property-tax payment?
Yes. The current County property-tax page encourages taxpayers who cannot pay the full amount by January 31 to pay as much as possible. Penalty and interest will apply to the unpaid remaining balance after the delinquency date.
Who qualifies for quarter property-tax payments?
Williamson County provides the statutory four-payment option for qualifying homesteads with an Over-65, Disabled Person or Disabled Veteran exemption. The normal installment schedule is January 31, March 31, May 31 and July 31.
Should I contact the Williamson County Tax Office or WCAD?
Use the Tax Assessor-Collector for bills, payments, receipts, delinquent balances and payment plans. Use Williamson Central Appraisal District for property value, exemptions, owner/address information and appraisal protests.
Does Williamson County sell tax lien certificates?
No. Williamson County states that Texas does not sell tax lien certificates. Delinquent real-estate liens are enforced through judicial foreclosure tax sales. The separate $10 property-tax certificate available from the Tax Office is a different type of document.
The TaxCollectors.org Editorial Team researches and reviews U.S. tax collector offices, property tax procedures, payment resources, deadlines, and official government links. TaxCollectors.org is an independent information publication operated by Quarks Systems Global Solutions.