The City of San Marcos, Texas, provides water, sewer, and drainage utility services to residents and businesses. Paying your utility bill on time helps avoid late fees, service interruptions, and supports the city’s reliable infrastructure. San Marcos offers multiple secure and convenient payment options, including a fast Quick Pay (one-time/guest payment) feature, full online account management through the Customer Connect portal, automated phone payments, in-person service with drive-through at the Utility Customer Service office, secure drop boxes, and traditional mail.
- You can make a quick one-time payment without creating an account at the official Customer Connect payment portal: https://connect.sanmarcostx.gov/pay-my-bill.
- For complete details on every current payment method, policies, and enrollment options, visit the official Paying Your Utility Bill page at https://www.sanmarcostx.gov/189/Paying-Your-Utility-Bill.
Quick Pay – One-Time Payment Without Login
The City of San Marcos supports Quick Pay (one-time payment) through its Customer Connect portal. This guest-style option lets you pay your bill immediately by entering your account number and mailing ZIP code—no username, password, or full account registration is required.
How to use Quick Pay:
- Go to https://connect.sanmarcostx.gov/pay-my-bill
- Enter your account number and mail ZIP code from your utility bill
- Review your current balance and due date
- Complete the secure payment with a credit/debit card or eCheck
Payments process promptly with confirmation. This is the fastest digital option when you need to settle your bill right away or prefer not to set up recurring login access.
Pay Online with Full Account Access (Customer Connect)
For ongoing account management, register or log in at the Customer Connect portal. Once inside you can view current and past bills, detailed usage history, make one-time or scheduled payments, enroll in AutoPay or recurring payments, sign up for electronic (paperless) billing, and set usage threshold notifications.
Registration: Use your account number and mailing ZIP code to create a secure profile. The portal is available 24/7 on desktop and mobile devices and provides instant payment confirmations.
Pay San Marcos TX Utility Bill by Phone
Call the dedicated automated payment line for fast phone transactions.
Automated Payment Phone Number: 512-393-8333
Have your account number and payment method (credit/debit card or eCheck) ready. Follow the voice prompts to complete your transaction. This option works well outside business hours or when you prefer not to use the internet. Live customer service assistance is available during regular business hours.
Pay In Person at Utility Customer Service
Utility Customer Service (Utility Billing) Address: 1040 Hwy 123, San Marcos, TX 78666
Hours: Monday through Friday, 8:00 a.m. – 5:00 p.m. (excluding holidays)
This location offers both a walk-in lobby and a convenient drive-through window for payments. Accepted methods include cash, check, money order, and credit/debit cards. Staff can assist with account questions, billing explanations, payment arrangements, or new service connections during your visit.
Pay by Mail
Mail your check or money order (payable to City of San Marcos) along with the payment stub or your account number clearly written on the check.
Mailing Address: City of San Marcos 636 E Hopkins San Marcos, TX 78666
Allow 7–10 business days for delivery and processing. Use the exact address printed on your current statement whenever possible for the fastest and most accurate crediting.
Drop Box Locations
Secure drop boxes are available for after-hours check or money order payments (no cash accepted in drop boxes). Payments placed in drop boxes are typically processed the next business day. For the most current drop box locations, check the official Paying Your Utility Bill page or contact Utility Customer Service.
Automatic Payments (AutoPay / Recurring Payments)
Enroll in AutoPay or recurring payments through the Customer Connect portal after registration. Your chosen payment method (bank account or card) will be charged automatically on the due date. You can also set up direct draft options. This helps prevent late fees and missed payments. Manage or cancel enrollment anytime in the portal.
Important Billing Information
Utility bills are issued monthly based on four weekly cycles depending on your service address. Late payments may result in fees or service disconnection. Contact Utility Customer Service promptly if you anticipate difficulty paying—extended payment arrangements may be available in certain situations. Keep your account number readily available for all transactions. The city provides usage data and notifications through the Customer Connect portal to help you manage consumption.
Customer Service and Contact Information
Utility Customer Service (Billing & Payments): 512-393-8383 (select option 3) or 512-393-8333 (automated payments) Email: [email protected] Physical Address: 1040 Hwy 123, San Marcos, TX 78666 Mailing Address for Payments: 636 E Hopkins, San Marcos, TX 78666
Have your account number and recent bill ready when contacting support for faster assistance.
FAQs
How do I pay my San Marcos TX utility bill without creating an account? Use Quick Pay at https://connect.sanmarcostx.gov/pay-my-bill. Enter your account number and mailing ZIP code for a fast one-time payment—no login required.
What phone number do I call to pay my San Marcos utility bill? Call 512-393-8333 for the automated payment system (available for cards and eCheck). Live assistance is available during business hours at 512-393-8383.
Where can I pay my San Marcos utility bill in person? Visit Utility Customer Service at 1040 Hwy 123, San Marcos, TX 78666 (Monday–Friday, 8:00 a.m.–5:00 p.m.). Both walk-in lobby and drive-through are available.
What is the mailing address for San Marcos utility payments? Send checks or money orders to City of San Marcos, 636 E Hopkins, San Marcos, TX 78666. Include your account number.
How do I set up automatic payments for my San Marcos utility bill? Register at the Customer Connect portal and enroll in AutoPay or recurring payments.
Does the City of San Marcos charge convenience fees? Convenience fees may apply to certain online, phone, and card payments. Cash, check, and some in-person options generally have lower or no additional fees from the city.
How do I find my San Marcos utility account number? It appears on your monthly utility bill statement and in the Customer Connect portal after login.
What should I do if I cannot pay on time? Call Utility Customer Service at 512-393-8383 immediately to discuss payment arrangements and avoid late fees or service issues.