The short answer
Texas is fully deregulated within ERCOT — most of the state.
Texas is the most competitive retail electricity market in the United States. Inside ERCOT (which covers ~85% of the state's population) the supplier market is deeper, the offers more aggressive, and the customer-acquisition cost lower than any other deregulated state. This guide walks through the ERCOT vs non-ERCOT split, how Retail Electric Providers (REPs) actually compete, and what to watch on the Power-to-Choose portal.
ERCOT vs non-ERCOT — where the market actually exists
ERCOT (Electric Reliability Council of Texas) is the regional grid operator that covers ~85% of the state by population. Inside ERCOT, retail electricity is fully deregulated and supplier choice is mandatory — Texas residents must pick a Retail Electric Provider (REP) when they move in or sign up for service.
Outside ERCOT — El Paso, Beaumont (Entergy Texas), and parts of the Panhandle and East Texas — electricity remains regulated. Customers in these areas have a single utility supplier and no competitive market.
The ERCOT/non-ERCOT split is geographic and not configurable. If your meter is inside ERCOT, you have supplier choice. If not, you do not.
How Retail Electric Providers (REPs) compete
REPs are PUC-licensed suppliers in the ERCOT market. They buy electricity wholesale from generators, package it into retail offers, and bill end-customers directly. Unlike Ohio and Pennsylvania, in Texas the REP is the billing party of record — the utility (TDU) does not bill end-customers.
This makes Texas different in one important way: when you switch REPs, the bill itself changes (different brand, different format, different login). The wires, meter, and outage response still stay with the utility (TDU) — the change is purely on the billing-and-supply side.
There are 80+ active REPs in the ERCOT market. Power-to-Choose lists them all, ranks offers by rate, and shows the contract terms for each.
Infographic
The 5-step switch in ERCOT — same flow, different billing party
Why fixed vs variable matters more in Texas than other states
ERCOT has more wholesale price volatility than any other US grid because it is energy-only (no separate capacity market) and because it is geographically isolated from the rest of the US grid. Summer peak hours can clear at $2,000–$5,000/MWh during heat waves; winter cold snaps have cleared at $9,000/MWh during scarcity events.
Variable REPs in Texas pass through wholesale spikes within 30–45 days, so summer and winter spikes land directly on customer bills. Fixed REPs absorb the spikes — at the cost of a steadier monthly bill.
The fixed-vs-variable choice matters more in Texas than in other deregulated states because the spread between the two outcomes is wider.
Infographic
Variable REP vs fixed REP — 12-month bill trajectory
Recap
Bottom line
Texas runs the most competitive retail electricity market in the United States. With 80+ active REPs and 200+ residential plans available inside ERCOT, the Power-to-Choose portal is the entry point for shopping. The Electricity Facts Label (EFL) standardizes plan presentation; usage-tier sweet-spot plans and avoidance of real-time index plans are the two key cautions.
For Texas residents inside ERCOT, the optimal play is locking a 12 to 36-month fixed-rate plan with no usage tier sweet-spot games and no introductory period. February 2021 freeze cautioned strongly against any real-time index pricing. The how-to-use-power-to-choose-texas guide covers the portal mechanics; the early-termination-fee-explained guide covers the contract terms to read carefully before signing.
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