Round Rock electric companies: 44 sellers, 41 rated by the state

Two companies stand behind each Round Rock power bill. Oncor owns the lines and the meter on your house. The seller you choose buys the power, sets the price and mails the bill. Change sellers, and the same Oncor crews still answer when a line goes down.

Three questions are left. Which ZIPs near Round Rock aren’t on Oncor? See your ZIP. Who sells here, and at what price? See the full list. What does the Oncor part cost? See costs.

In Round Rock, almost always yes. A few miles away, it depends on whose wires reach your street. Austin Energy, Pedernales Electric Cooperative, Bluebonnet Electric Cooperative and the City of Georgetown each run their own system here, and none of them lets you pick a seller.

ZIPs where the plan list can mislead you

Power to Choose lists plans by ZIP, not by street address. By our reading, a ZIP with at least one Oncor address gets the full Oncor list. So a list on your screen doesn’t prove your home can buy the plans. We pulled the live lookup for every ZIP in our tool on Oct 16, 2026.

Four ways to confirm your utility

1. Read your bill

   Find the name on the top. A direct bill from a utility means no choice.

2. Check your ESI ID

   Its first 7 digits name the wires company. 1044372 means Oncor. Oncor also has an ESI ID lookup.

3. Austin addresses

   Open the city’s Property Profile tool, expand Boundaries & Grids, and tick Austin Energy Utility Service Area.

4. Georgetown or Manor

   Georgetown’s Utility Information map has an Electric Service Providers layer. Bluebonnet has an Electric Provider lookup.

Pedernales’ service-area page lists a “Service Area Map” that we could not open. If you think you’re on its lines, call 888‑554‑4732. Our utility finder explains the rest, and Austin Energy rates and outage steps cover the Austin side.

Look at the state’s complaint rating first. Then type how much power you use, and each seller’s simplest 12-month plan is priced at that amount. Oncor’s delivery charge is already counted in.

Where is the company I’m looking for?

Some licensed sellers had no plans at all posted for Oncor’s area on Oct 16, 2026. Among them were Vistra’s 4Change Energy and Ambit, NRG’s XOOM Energy and Stream, Genie’s Town Square Energy, Tesla Electric, Shell Energy Solutions and Energywell. They may still sign people up on their own sites. If 4Change or Ambit is on your short list, read our 4Change Energy review or Ambit Energy review first.

The PUCT grades sellers by complaints. It divides each seller’s complaints by its customers over six months, then sorts the sellers into five groups of similar size. Five of five means the fewest complaints per customer.

• Same owner, different grades. TXU Energy, Express Energy and Veteran Energy all belong to Vistra. TXU earned a 5 of 5. Express and Veteran share one license and a 3.
• Shared license, shared grade. Rhythm and Energy Texas operate under one license, so both show a 3 of 5.
• Fault isn’t judged. A complaint counts against the seller whether or not the state found the seller at fault.
• Grades move. This edition covers March 1 to August 31, 2026. A newer one will replace it.
• Three sellers are still unrated: Abundance Energy, SmartEnergy and Texans Choice Power.

Want the raw counts, or need to file a complaint? Start at Texas electricity complaints. Our own 100-point scores use public records, and how we score shows the formula.

A handful of large parents own many of the names. The 44 brands on Oncor’s lines hold 37 state licenses, and the sellers’ own filings fold those into 27 owners or fewer.

Two of these parents are also among Oncor’s biggest customers. Oncor’s 2025 annual report says retail sellers owned by Vistra and by NRG supplied 25% and 21% of its operating revenue.

A Round Rock bill has two layers. Oncor’s delivery charge is the same whichever seller you pick. The energy price on top is yours to shop.

How hot does Round Rock get?

Round Rock has no weather station of its own. Its nearest one, Round Rock 3 NE, records rain only. So we show NOAA’s 1991–2020 normals for stations nearby, 11 to 23 miles away.

The stations disagree, so treat any one number as a range. By cooling degree days, a measure of how much cooling a place needs, Camp Mabry runs 17% above Taylor and 23% above Midland. Price plans at your summer use, not only at 1,000 kWh. Our high bill guide lists the usual causes of a surprise.

The answer depends on your usage and your priorities. Each pick below draws on the state’s ratings, the plans’ fact labels and our scores. No seller paid to be one of these picks.

Found a seller you like? Put its plans next to everyone else’s at your address, then finish signing up in a few minutes.

Curious what the delivery part of your bill pays for? Read about Oncor delivery charges. If your home turns out to be on Austin Energy, its rates and outage steps work differently.

An outage or a fallen line is Oncor’s job. A bill, a plan or a move is your seller’s job. Oncor repairs the lines no matter who sends your bill.

On Austin Energy, Georgetown, Pedernales or Bluebonnet lines? Use the outage numbers in the utility table above instead, because Oncor can’t fix those lines.

Ice, tornadoes and a growing grid

• Feb 19, 2021: Oncor said an ice storm “blanketed” its southern region of Killeen, Round Rock and Temple, along with a region in East Texas. 72,000 outages remained across those areas that morning.
• Mar 22, 2022: Tornadoes struck Jacksboro, Bowie, Round Rock and Jarrell. Oncor’s update said, “About 7,000 outages remain in the Round Rock area.”
• Feb 4, 2023: Oncor told Round Rock, Taylor, Temple and Killeen that their communities “received some of the heaviest ice accumulation.”

For storm prep and outage tips, see what to do when the power goes out.

Round Rock’s neighbors split three ways. Some sit on Oncor’s lines like Round Rock does. Some mix several utilities. Others have no choice at all.

Hutto’s city page lists Oncor, at 888‑313‑6862, as its electric company and points to Power to Choose. Georgetown is harder. Its outage page says the city “has multiple electric providers in the area,” and its own map labels 59.8% of the city’s homes as Georgetown-only. Another 12.7% are Pedernales-only and 10.3% Oncor-only. The rest are shared areas.

Taylor, about 15 miles from Round Rock in a straight line, is the site of Samsung’s federally backed chip plant. The NIST page lists “up to $4.745 billion in direct funding” and says “All facilities are expected to be operational by 2030.” It says nothing about electricity. Taylor’s ZIP, 76574, lists 174 Oncor plans.

Next door to the south, Pflugerville has its own guide: Pflugerville electric companies. Farther up I-35, Killeen also runs on Oncor.

Round Rock keeps adding people, and 44.5% of its households rent, the Census survey shows. Median rent is $1,763 a month. Four steps get your lights on.

1. Confirm Oncor

   Most Round Rock addresses are Oncor. For a home near the northwest edge, check an old bill or ask your landlord.

2. Price plans at your use

   Use the table above. 140 of 174 plans are flagged for new customers only. The state doesn’t define that flag, so ask a seller if a move-in qualifies.

3. Choose a start date

   Oncor can switch on a smart meter the same day if your seller’s order arrives by 7 p.m. Central, Monday to Saturday.

4. Ask about a deposit

   Some sellers want one. Our no-deposit guide shows ways around it.

Every seller sets its own same-day cut-off, and it is earlier than Oncor’s 7 p.m. See same-day electricity for 12 sellers’ cut-off times, or our move-in steps for the whole list.

Five checks before you sign

1. 1
   Read prices at 3 levels

   Check the fact label at 500, 1,000 and 2,000 kWh. A plan priced low at 1,000 kWh can cost double per kWh at 500.

2. 2
   Spot a bill credit

   A sharp price drop at exactly 1,000 kWh means a credit is doing the work. Miss it one month, and you pay the higher price.

3. 3
   Check the label date

   Oncor’s charge rose on Oct 4, 2026. A label older than that can run about 0.8¢ per kWh low.

4. 4
   Find the exit fee

   Some plans charge one flat fee, such as True Power’s $300. Others charge $20 for each month left, as Rhythm, BKV and Veteran do.

5. 5
   Know your 3 days

   If you switch sellers, you can cancel free within 3 federal business days after you get the terms. A move-in doesn’t get this right.

Changing sellers later is free, and Power to Choose says it takes up to seven business days with no gap in service. Here’s how to switch. If your contract is ending, see what to do next.

Short answers drawn from state records, utility maps and the sellers’ own documents.

More guides: Every Texas electricity company · Smart Meter Texas · Dallas · Cheapest plans · Apartment electricity · Compañías de luz baratas, en español

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