Enter your zip code to instantly unlock exclusive Texas energy plans.
BKV Energy
AP Gas & Electric
BKV Energy
BKV Energy
| Provider | Plan | Rate (¢/kWh) | Term | Green % |
|---|---|---|---|---|
|
BKV Energy
|
Verbena 13 | 14.1¢ | 13 mo | 29% |
|
BKV Energy
|
Verbena 12 | 14.5¢ | 12 mo | 29% |
|
AP Gas & Electric
|
APG&E Fixed 12 | 16.3¢ | 12 mo | — |
|
AP Gas & Electric
|
APG&E Fixed 14 | 16.4¢ | 14 mo | — |
Top 10 diverse plans · Max 2 per provider · View all plans
Your electricity in zip code 78664 is delivered by Oncor Electric Delivery. Since this area is deregulated, you can choose your retail electricity provider while Oncor Electric Delivery maintains the power lines and handles outage restoration.
Round Rock residents in zip code 78664 have real power when it comes to choosing their electricity provider. Thanks to Texas's deregulated energy market, you're not locked into a single supplier — instead, you can shop from 19 competing providers offering 86 plans through Oncor Electric Delivery. In March 2026, rates in the Oncor service area start as low as 9.3¢/kWh, well below the area average of 13.1¢/kWh. Whether you're looking for a short-term plan, a long-term fixed rate, or a green energy option, 78664 shoppers have plenty of competitive choices to explore right now.
If you haven't compared electricity plans recently, March 2026 is a great time to shop. The cheapest available rate in the Oncor service area is 9.3¢/kWh, offered through AP Gas & Electric's SimpleSaver 12 plan. That's a significant savings opportunity compared to the area average of 13.1¢/kWh — a difference that can add up to hundreds of dollars annually for a typical Texas household.
Regardless of which retail provider you choose, your electricity will still be delivered through Oncor Electric Delivery (ONCOR), the local transmission and distribution utility for 78664. Oncor handles the physical power lines, maintenance, and outage response. For outages or line issues, contact Oncor directly at 1-888-313-4747 or visit [oncor.com](https://www.oncor.com).
Some of the well-known providers currently serving Round Rock's 78664 zip code include:
1. Compare contract lengths — 12-month fixed plans offer price stability heading into summer.
2. Watch for usage-based discounts — some plans offer lower rates at 1,000 or 2,000 kWh usage tiers.
3. Check for hidden fees — always review the Electricity Facts Label (EFL) before signing.
4. Consider green energy plans — several providers in 78664 offer 100% renewable options at competitive rates.
Shopping now in March 2026 lets you lock in a low rate before Texas summer demand pushes prices higher.
Starting at 14.1¢/kWh
2 plans available
Starting at 16.3¢/kWh
2 plans available
Lock in a fixed-rate plan before Memorial Day weekend. Round Rock's July and August heat routinely pushes AC systems into overdrive, and variable-rate plans can see sharp price increases during peak ERCOT demand periods — a fixed rate gives you a predictable bill all summer.
Set your thermostat to 78°F when home and 85°F when away during summer. With highs regularly hitting 98–105°F in Round Rock from June through September, each degree of setpoint adjustment can reduce your cooling costs by approximately 3% per month.
Audit your plan at least once a year — ideally every October. Contract terms that were competitive 12 months ago may no longer reflect the best available rates. Use Choice Energy Network to compare current Round Rock offers before your contract auto-renews.
If you work from home or have a Kalahari water park-level household with kids home all day, investigate free nights or time-of-use plans. Shifting dishwasher, laundry, and EV charging to off-peak hours can meaningfully cut your monthly Oncor delivery and energy charges.
After Winter Storm Uri, consider adding a whole-home surge protector and reviewing whether your REP plan includes any bill assistance or payment protection features. Several Round Rock-area REPs offer Winter Suspension protection that limits disconnect risk during declared weather emergencies.
The lowest available rate in the Oncor service area for zip code 78664 is 9.3¢/kWh, offered through the SimpleSaver 12 plan from AP Gas & Electric. Rates and availability can change, so it's worth comparing current plans before signing up.
There are 19 retail electricity providers currently serving the 78664 zip code, offering a total of 86 plans through the Oncor Electric Delivery network. Providers include Shell Energy, TXU, 4Change Energy, Payless Power, XOOM Energy, Ambit Energy, and more.
Oncor Electric Delivery (ONCOR) is the transmission and distribution utility for 78664. They own and maintain the power lines and handle outage repairs. You can reach Oncor at 1-888-313-4747 or at oncor.com. Your retail electricity provider handles billing and customer service.
Yes, zip code 78664 in Round Rock, Texas is in a fully deregulated electricity market. This means residents can freely choose their retail electricity provider and shop for the best rates and plans, rather than being assigned to a single utility-run supplier.