When you flip a light switch in the Lone Star State, a complex network of energy companies springs into action to power your home. While many Texans know they have the power to choose their electricity provider, few understand that where they live completely dictates who actually delivers that power. In Texas, your electricity experience is divided between the company that sells you energy and the utility company that physically maintains the grid in your specific service area.
What is a TDSP and Why Does It Matter?
A Transmission and Distribution Service Provider (TDSP)—often called a utility—is the entity responsible for maintaining the physical power lines, poles, and meters in your region. Unlike Retail Electric Providers (REPs), you cannot choose your TDSP; it is determined strictly by your geographic location. The major TDSPs serving deregulated areas in Texas include Oncor (serving Dallas-Fort Worth and surrounding areas), CenterPoint Energy (Houston metro area), AEP Texas (South and West Texas), and Texas-New Mexico Power (TNMP).
How TDSPs Impact Your Monthly Bill
Understanding Delivery Charges and Usage Blocks
Your monthly electricity bill is actually a combination of the supply rate from your chosen provider and the delivery charges from your local TDSP. Pricing is based on each specific area’s utility rates, and it is important to note that not all cities in Texas have electric choice. When you look at plan options, average prices per kWh are based on standard 1,000 kWh or 2,000 kWh monthly usage blocks. These blocks include both fixed and variable local charges from regional utilities, which means your final price per kWh can fluctuate depending on how much energy you consume.
Navigating Rates and the EFL
To find the best fit for your household, you must understand how these components interact. Electricity service offers can be fixed or variable. To ensure transparency, rates are gathered directly from each provider’s Electricity Facts Label (EFL) for comparison purposes only. These rates are subject to change and are only finalized when an agreement is completed.
BulbOne: Your Independent Guide to Texas Power
Navigating these regional utility zones can feel overwhelming, but BulbOne is here to help. As an independent platform, we serve as an expert guide to help consumers explore their power to choose the best, most cost-effective, and reliable cheap electricity plans in Texas. We make it easy to compare Texas electricity rates without the headache. Please note that our platform is an independent resource and is in no way associated with PowerToChoose.org (which is operated by the Public Utility Commission of Texas).
Want to check the most competitive rates available in your specific Texas zip code? Just call 1-844-567-2863 to speak with our local energy experts today.
Frequently Asked Questions
What is the difference between a TDSP and a Retail Electric Provider (REP)?
A TDSP (like Oncor or CenterPoint) owns and maintains the physical electric grid, wires, and poles, and handles power outages. An REP is the retail company you buy your electricity plan from and who bills you each month.
Why does my location dictate my TDSP?
TDSPs operate as regulated monopolies within specific geographic boundaries to prevent the redundant construction of multiple power line networks. Your physical address determines your utility delivery zone.
Are TDSP delivery fees the same for everyone?
No. Each TDSP has its own rate structure approved by the Public Utility Commission of Texas. These regional fees are passed through to the consumer and vary depending on your specific utility zone.


