Williamson County Tax Assessor Collector: Pay Taxes, Renew Tags & Use the Right Office
If you searched for the Williamson County Tax Assessor Collector, you probably need to pay a property tax bill, print a receipt, renew Texas registration, transfer a title, check Georgetown/Round Rock/Cedar Park/Taylor office hours, or understand whether your question belongs to the Tax Office or Williamson Central Appraisal District. This refreshed guide keeps the target keyword and adds deeper Texas-specific user help.
Important: Williamson County lists Larry Gaddes as Tax Assessor/Collector, main phone 512-943-1601, mailing address 904 S Main Street, Georgetown, TX 78626, Monday hours 8 a.m. to 5:30 p.m., Tuesday-Friday hours 8 a.m. to 4 p.m., and four public tax office locations.
What do you need to do right now?
The Williamson County Tax Assessor Collector, led by Larry Gaddes, handles property tax collection, motor vehicle registration and title services, tax receipts, payment options, tax certificates, some delinquent tax routing, and related county tax services. The main mailing address is 904 S Main Street, Georgetown, TX 78626, and telephone inquiries go to 512-943-1601. For property tax payment, use tax.wilcotx.gov. For property value, exemptions, ownership changes, mailing-address changes and protests, use Williamson Central Appraisal District, not the Tax Office.
When Is Your
Next Tax Deadline?
Select your state — see your exact deadline, live countdown, and whether you’re on time or already accruing penalties.
What the Williamson County Tax Assessor Collector Handles
The Williamson County Tax Assessor Collector collects property taxes and fees, provides motor vehicle title and registration services, and helps taxpayers with payment, receipts, tax certificates and office services.
Property Tax Penalty & Interest Calculator
State-specific penalty rates • Interest accrual • Tax lien deadline • Cost-of-waiting breakdown
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| Monthly Interest— | $0.00 |
| Fixed Fees— | $0.00 |
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Daily Accrual Rate
Interest and penalties are adding this much to your balance every single day
Tax Lien Warning
| If You Pay On | Days Late | Penalty | Interest | Total Owed | Extra Cost |
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Texas counties use the “Tax Assessor-Collector” title because the office has more than one role. For most visitors, the two big needs are property tax and motor vehicle service. Property tax users want to search, pay, print a receipt, avoid penalty/interest, understand exemptions or ask about escrow. Vehicle users need registration renewals, title transfers, address changes, disabled placards or new Texas resident help.
The main thing to understand is that the Tax Office is not the same as the appraisal district. The Tax Office collects the bill. Williamson Central Appraisal District handles taxable property, value, exemptions, owner and address changes, notices of appraised value and protests.
Use Tax Office for payments
Property tax payments, receipts, payment methods, tax certificates, vehicle registration, titles, disabled placards and county tax office locations start here.
Use WCAD for value issues
Taxable value, appraised value, exemptions, address or ownership changes, protest filing and appraisal notices belong to Williamson Central Appraisal District.
Use TxDMV for statewide vehicle rules
Williamson County tax offices work with the Texas Department of Motor Vehicles for registration and title services, but state forms and rules still matter.
Simple WilCo routing rule
If your question is “How do I pay or get a receipt?” use the Tax Assessor-Collector. If your question is “Why is my property value or exemption wrong?” use WCAD. If your question is “How do I register or title a vehicle?” start with the Williamson County motor vehicle pages or TxDMV renewal system.
How to Pay Williamson County Property Taxes Online
The official online property tax search and payment portal is tax.wilcotx.gov, where you can search by property, owner, address or account details.
Do not start from a random search ad. Start from Williamson County’s Tax Assessor Collector page or go directly to the official tax portal. The portal is branded as Williamson County Tax Assessor Collector and links back to WilCo and WCAD resources. Before you pay, confirm the owner, property address, account number, Quick Ref ID and tax year.
Open the official property tax portal
Use tax.wilcotx.gov to search and pay property taxes. The portal also links to WCAD, Comptroller resources, tax-rate information and e-communication requests.
Search carefully
Search by owner name, property address, account number or the details shown on your statement. If you recently bought the property, also search by address because the prior owner may still appear in some records.
Check tax year, entities and balance
Williamson County bills may include multiple taxing entities. Review total amount, tax year, owner, property address and any prior balance before paying.
Choose e-check, card, mail, drop box or in-person
Online property tax payments paid by e-check are not assessed a vendor convenience fee. Credit/debit card transactions have a convenience fee. Mail and drop box options require check or money order rules.
Print or save the receipt
Save the confirmation number, payment date, property account, amount, payment method and tax year. This protects you if your lender, title company, buyer, seller or tax office later asks for proof.
Search & Pay Property Tax
Use this official Williamson County portal to search property tax accounts and pay online.
Open Tax PortalPayment Options
Use this official page for mail, bank bill pay, prepayment, installment and drop-box instructions.
Open Payment OptionsWilliamson County Property Tax Deadline, Penalty and Interest
For 2025 property taxes, Williamson County states that taxes must be paid in full on or before January 31, 2026 to avoid penalty and interest, with delinquency beginning February 1, 2026.
Texas property taxes are usually mailed in the fall and become delinquent after January 31 of the following year if unpaid. Williamson County’s official portal also warns that placing payment in a USPS mailbox does not guarantee a postmark for that day. If you are mailing near the deadline, request a USPS retail postmark or certificate of mailing.
October
Statements are generally mailed in the fall. Williamson County announced 2025 statements would be mailed the week of October 20.
January 31
Full payment deadline to avoid penalty and interest. USPS postmark matters for mailed payments.
February 1
Delinquency begins, and a 7% penalty and interest amount was listed for 2025 accounts with outstanding balances.
Escrow accounts
Property owners whose taxes are escrowed by a lender can still view billing information in the county system.
Deadline-day mailing warning
A personal mailbox, community mailbox or office mail drop does not guarantee the payment receives a timely USPS postmark. If you wait until the deadline, use the official portal, drop box rules, or USPS retail postmark instructions carefully.
Williamson County Tax Office Hours and Locations
Williamson County lists Tax Office hours as Monday 8 a.m. to 5:30 p.m. and Tuesday-Friday 8 a.m. to 4 p.m., with office locations in Cedar Park, Georgetown, Round Rock and Taylor.
Georgetown Tax Office
Main mailing address and central office
Cedar Park Tax Office
Northwest Williamson County service location
Round Rock Tax Office
Jester Annex area service location
Taylor Tax Office
East Williamson County service location
Drive-thru and drop-box rules
Drive-thru service is limited to specific tasks at Cedar Park and Round Rock, and forms must be completed before using it. Drop boxes are for checks or money orders only. Do not place cash or credit card information in any drop box.
Williamson County Vehicle Registration, Title Transfers and New Texas Resident Services
Williamson County Tax Office works with the Texas Department of Motor Vehicles for vehicle title and registration services.
Vehicle services are a major reason users search for the Williamson County Tax Assessor Collector. TxDMV says county tax assessor-collector offices provide most title and registration services, including registration renewals, title transfers, motor vehicle address changes, disabled parking placards, copies of registration receipts and temporary registration.
Renew registration online
Williamson County recommends renewing online through TxDMV when eligible. Allow up to three weeks for processing and mailing.
Title and new resident transfers
Title and new resident transfers require original signed documents. Faxed, scanned or emailed copies are not acceptable, and signatures must be in ink.
Avoid heavy traffic times
The Motor Vehicle page warns that 11:30 a.m. to 2:30 p.m., the first of the month and the end of the month are heavy-traffic times.
Neighborhood renewal option
Williamson County says current or expired vehicle registrations up to nine months past due can be renewed at participating Neighborhood Locations. This is useful when you only need a registration sticker and do not need a full title transaction.
Title transaction warning
Do not show up with phone photos of paperwork for a title transfer. The official county page says original signed documents are required. Bring proper ID, original forms, title documents, proof of insurance and any TxDMV forms that apply to your specific transaction.
Williamson County Tax Assessor Collector vs Williamson Central Appraisal District
The Tax Assessor Collector collects taxes; Williamson Central Appraisal District determines taxable property, value, ownership, exemptions and protest-related matters.
Use Tax Office for
- Paying property taxes
- Printing receipts
- Payment methods and deadlines
- Tax certificates
- Motor vehicle registration and title services
- Delinquent tax payment routing
Use WCAD for
- Appraised value
- Taxable owner
- Property exemptions
- Mailing address changes
- Notices of appraised value
- Property value protests
WCAD contact
Williamson County’s property tax page states that Williamson Central Appraisal District is located at 625 FM 1460, Georgetown, TX 78626, phone 512-930-3787, and is a separate local agency not part of Williamson County Government or the Tax Assessor’s Office.
Williamson County Property Tax Payment Fees and Mailing Rules
Williamson County accepts cash, checks, money orders, debit cards and credit cards, but card payments have a convenience fee and online property tax e-checks are not assessed a vendor convenience fee.
Online e-check
The official site says online property tax payments paid by e-checks are not assessed a vendor convenience fee.
Credit/debit card
Credit/debit card transactions have a 2.15% convenience fee with a $2.50 minimum.
Returned checks
Checks and e-checks returned for insufficient funds or closed accounts incur a $30 return item fee.
Mailing address and check payee
Mail payments to Williamson County Tax Office, 904 S Main Street, Georgetown, TX 78626. The official payment page says to make personal checks, cashier’s checks or money orders payable to Larry Gaddes PCAC, CTA.
Bank bill pay warning
If your bank sends a paper check without a USPS postmark, the payment may be considered paid when received rather than when you scheduled it. Williamson County recommends scheduling bank bill pay early enough for processing and checking postmark policies.
Williamson County Prepayments, Quarter Installments and Homestead Installment Agreement
Williamson County offers several payment-related options, but each option has rules, eligibility limits and deadline requirements.
Prepayments
Taxpayers can pay amounts toward future taxes when current and prior taxes are not delinquent and the payer consents to prepayment treatment.
Quarter installment plan
Qualifying over-65, disabled, disabled veteran or surviving spouse taxpayers with a homestead exemption may use quarterly installment deadlines.
Homestead installment agreement
The Tax Collector may enter an agreement with a delinquent taxpayer for tax, penalty and interest on a claimed homestead under Texas Property Tax Code provisions.
Quarter installment schedule
- 1st installment due January 31.
- 2nd installment due March 31.
- 3rd installment due May 31.
- 4th and final installment due July 31.
Do not assume you qualify
Quarter installment plans are not for every property owner. Eligibility is tied to specific exemptions and homestead status. Call 512-943-1601 before relying on an installment plan.
Williamson County Delinquent Taxes and Texas Tax Sale Rules
Williamson County states that 2025 property taxes become delinquent February 1, 2026, and Texas does not sell tax lien certificates the way some other states do.
Texas delinquent property tax rules can be misunderstood. Williamson County’s tax sale page states that unlike some other states, Texas does not sell tax lien certificates. Texas law requires judicial foreclosure of tax liens held by political subdivisions, and properties encumbered by tax liens may only be sold at tax sales.
Confirm the exact delinquent amount
Penalty and interest can change the payoff. Do not rely on last month’s screenshot if the account is already delinquent.
Pay as much as possible if you cannot pay all
Williamson County encourages taxpayers who cannot pay in full by January 31 to pay as much as possible, while noting penalty and interest apply to the remaining balance.
Do not confuse Texas tax sales with tax-lien-certificate investing
Williamson County says Texas does not sell tax lien certificates. Delinquent properties can move through judicial foreclosure and tax sale rules.
Tax sale timing
Williamson County’s tax sale page says the next delinquent tax sale is generally the 1st Tuesday of the month at 10 a.m., and users should confirm the next sale through the MVBA website. Tax sale information can change, so verify before attending or relying on any date.
Williamson County Tax Certificate Request for Buyers, Sellers and Title Companies
Williamson County lists a $10 fee per tax certificate, with requests submitted in person or online and certificates processed at the time of payment.
Tax certificates matter when a property is being sold, refinanced, researched or cleared for title work. A title company, investor, buyer, seller or lender may need certificate information before closing. Williamson County lists Georgetown-only in-person handling at 904 S Main Street.
In person
Tax certificate requests can be handled in person at the Georgetown office only, located at 904 S Main Street, Georgetown, TX 78626.
Online request
The online tax certificate request form is used for phone-payment handling or requests for more than 10 certificates.
Payment before pickup or mailing
Williamson County notes that payment must be made before tax certificate pickup or mailing.
What This Williamson County Tax Assessor Collector Refresh Adds Beyond a Basic Directory Page
A basic page gives a phone number. A useful Williamson County page helps the user finish the task: pay tax, avoid penalty, renew tags, choose the right office or call WCAD instead of the Tax Office.
Payment-first workflow
The guide puts tax.wilcotx.gov, deadline, receipt and payment-method warnings near the top because that is the main user need.
WCAD separation
The article clearly separates appraisal/exemption/protest questions from collection/payment questions.
Vehicle service clarity
Registration renewal, title transfer, new resident and disabled placard tasks are explained as part of the Tax Assessor-Collector user intent.
Office-specific guidance
Cedar Park, Georgetown, Round Rock and Taylor locations are separated with drive-thru/drop-box cautions.
Texas delinquency context
The guide explains February 1 delinquency and the Texas tax-sale vs tax-lien-certificate distinction in plain language.
Closing-table usefulness
Tax certificate guidance helps buyers, sellers, lenders, investors and title companies, not only homeowners.
Williamson County Tax Assessor Collector Map: Georgetown Main Office
The main Williamson County Tax Office mailing address and Georgetown office is 904 S Main Street, Georgetown, TX 78626.
Bring for property tax help
- Tax statement or Quick Ref ID
- Owner name and property address
- Account number if available
- Payment proof or confirmation number
- Mortgage or closing documents if relevant
Bring for vehicle help
- Original signed title documents
- Government ID
- Proof of insurance if required
- Vehicle inspection/registration materials if applicable
- Ink signatures; no faxed/scanned/emailed copies for title transfers
Official Williamson County Tax Assessor Collector Links
Use official Williamson County, WCAD, TxDMV and Texas Comptroller links first. Payment rules, deadlines, office closures, fees and forms can change.
Williamson County Tax Assessor Collector FAQ: Payments, Hours, WCAD, Vehicles and Late Taxes
These answers focus on real Williamson County taxpayer problems: paying online, finding the right office, avoiding January deadline mistakes, renewing registration and knowing when WCAD is the right agency.
Best Way to Use the Williamson County Tax Assessor Collector Website
Use the Williamson County Tax Assessor Collector website when you need to pay property taxes, print receipts, check payment options, schedule a tax office appointment, renew registration, transfer vehicle title, request a tax certificate, or verify office hours and locations. Use tax.wilcotx.gov for property tax search and payment.
The biggest user mistake is calling the wrong office. The Tax Office collects taxes and handles many vehicle services. Williamson Central Appraisal District handles value, exemptions, ownership, mailing address and protest questions. If you are close to January 31, pay early, confirm the postmark/payment rules, and save proof immediately.
Editorial note and official-source warning
This independent TaxCollectors.org guide helps Williamson County, Texas taxpayers find official tax payment, vehicle registration, office, deadline and agency-routing information. It is not the official Williamson County Tax Assessor-Collector, Williamson Central Appraisal District, Texas DMV, Texas Comptroller, title company, tax attorney, lender or financial adviser.
Always verify current balances, payment fees, tax deadlines, delinquent payoff, office closures, accepted documents, vehicle title requirements, tax certificate procedures, appointment availability, exemptions and protest deadlines directly through official Williamson County, WCAD, TxDMV and Texas Comptroller sources before acting.
Official source shortcuts: Tax Assessor Collector, Search & Pay Property Tax, Property Tax, Locations & Hours, Motor Vehicle, Williamson CAD, and TxDMV Williamson County Office.