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Oncor Electric · ZIP 78664

Cheapest Electricity Plans in Round Rock — Downtown (ZIP 78664), Texas

Live electricity rates for ZIP code 78664 in the Oncor Electric service area. 44 providers available — compare and enroll online in minutes.

7.5¢
Lowest Rate (1k kWh)
Enter your ZIP for the most accurate rates
14.3¢
Avg Rate (1k kWh)
Enter your ZIP for the most accurate rates
44
Providers

Current Rates in ZIP Code 78664

All rates in ¢/kWh. TDSP delivery fee from Oncor Electric billed separately on your monthly statement.

Provider / Plan 500 kWh 1,000 kWh ★ 2,000 kWh Term Action
Chariot Energy
GridPlus 12
100% Renewable
 20.5¢ 7.5¢ 13.6¢ 12 mo Enroll →
Infuse Energy
PTC Infusion Flex
26% Renewable
 13.3¢ 12.4¢ 12¢ 1 mo Enroll →
Ranchero Power
No Contract Advantage
6% Renewable
 13.4¢ 12.4¢ 12¢ 1 mo Enroll →
True Power
True Value 12
15% Renewable
 13¢ 12.6¢ 12.4¢ 12 mo Enroll →
Octopus Energy
Octo Simple 12
100% Renewable
 13.2¢ 12.8¢ 12.6¢ 12 mo Enroll →
Gexa Energy
Gexa Eco Choice 12
100% Renewable
 13.4¢ 13¢ 12.8¢ 12 mo Enroll →
Varsity Energy Llc
HOMERUN 12
31% Renewable
 13.4¢ 13¢ 12.8¢ 12 mo Enroll →
Frontier Utilities
Frontier Power Saver 12
30% Renewable
 13.4¢ 13¢ 12.8¢ 12 mo Enroll →
Companion Energy
Companion + Perks 12
30% Renewable
 13.4¢ 13¢ 12.8¢ 12 mo Enroll →
Ae Texas
Smart Secure 14
35% Renewable
 13.6¢ 13.1¢ 12.9¢ 15 mo Enroll →
Abundance Energy
Straight Forward 12
25% Renewable
 14.1¢ 13.2¢ 12.7¢ 12 mo Enroll →
Sfe Energy Texas Inc
SFE RewardsPlus - 12
35% Renewable
 13.6¢ 13.2¢ 13¢ 12 mo Enroll →
Budget Power
No Gimmicks 24
35% Renewable
 13.7¢ 13.3¢ 13.1¢ 24 mo Enroll →
Rhythm
Digital Choice 12
100% Renewable
 13.4¢ 13.4¢ 13.5¢ 12 mo Enroll →
Texans Choice Power Llc
Choose 6
35% Renewable
 14¢ 13.6¢ 13.4¢ 6 mo Enroll →
Constellation Newenergy Inc
Simple Switch 7
26% Renewable
 14.1¢ 13.7¢ 13.5¢ 7 mo Enroll →
Energy Texas
No Bull 24
100% Renewable
 13.8¢ 13.8¢ 13.9¢ 24 mo Enroll →
Think Energy
Think Clean 12 with Smart Thermostat Connected
100% Renewable
 13.7¢ 13.8¢ 13.9¢ 12 mo Enroll →
Ap Gas & Electric (tx) Llc
TrueClassic 18
6% Renewable
 14.2¢ 13.8¢ 13.6¢ 18 mo Enroll →
Bkv Energy
Daisy 14
29% Renewable
 14.5¢ 14.1¢ 13.9¢ 14 mo Enroll →
Revolution Energy Llc
Stars and Stripes 24
26% Renewable
 14.9¢ 14.1¢ 13.7¢ 24 mo Enroll →
Spark Energy Llc
Choose 12
35% Renewable
 14.5¢ 14.1¢ 13.9¢ 12 mo Enroll →
Good Charlie & Co Llc
GoodEnergy 36
26% Renewable
 15.1¢ 14.2¢ 13.8¢ 36 mo Enroll →
Southern Federal Power Llc
SoFed Try Us Out - 48
6% Renewable
 15.3¢ 14.3¢ 13.9¢ 48 mo Enroll →
Cleansky Energy
Embrace Green 36 - New Customer Special
100% Renewable
 14.8¢ 14.3¢ 14.1¢ 36 mo Enroll →
Octopus Energy Llc
Octo Simple 24
100% Renewable
 14.8¢ 14.4¢ 14.2¢ 24 mo Enroll →
Champion Energy Services Llc
Champ Saver-24
26% Renewable
 14.8¢ 14.4¢ 14.2¢ 24 mo Enroll →
Base Power
Base Energy 36
100% Renewable
 14.9¢ 14.5¢ 14.3¢ 36 mo Enroll →
Smartenergy Holdings Llc
SmartGreen 12 $200 Bill Credit
100% Renewable
 15.8¢ 14.8¢ 14.4¢ 12 mo Enroll →
Discount Power
Saver 36
22% Renewable
 15.4¢ 14.9¢ 14.7¢ 36 mo Enroll →
Heritage Power Llc
Bright Start 12 - $25 credit on your first bill!
25% Renewable
 15.4¢ 15¢ 14.8¢ 12 mo Enroll →
Cirro Energy
Smart Simple 36
24% Renewable
 15.6¢ 15.1¢ 14.9¢ 36 mo Enroll →
Trieagle Energy Lp
Simple Savings 28
3% Renewable
 15.7¢ 15.2¢ 14.9¢ 28 mo Enroll →
Direct Energy
Autopay Texas 12
24% Renewable
 16.3¢ 15.4¢ 14.9¢ 12 mo Enroll →
Atlantex Power
Luminous 36
35% Renewable
 16.1¢ 15.6¢ 15.4¢ 36 mo Enroll →
Green Mountain Energy Company
Pollution Free e-Plus 12 Choice
100% Renewable
 16.8¢ 15.9¢ 15.4¢ 12 mo Enroll →
Amigo Energy
Basics PTC - 36
31% Renewable
 16.3¢ 15.9¢ 15.7¢ 36 mo Enroll →
Tara Energy
Basics PTC - 24
31% Renewable
 16.3¢ 15.9¢ 15.7¢ 24 mo Enroll →
Just Energy
Basics PTC - 24
31% Renewable
 16.3¢ 15.9¢ 15.7¢ 24 mo Enroll →
Txu Energy
Simple Value 12
3% Renewable
 17.6¢ 16.2¢ 15.5¢ 12 mo Enroll →
Nec Co-op Energy
Residential Electricity... Plain and simple.
17% Renewable
 18.2¢ 17¢ 16.4¢ Variable Enroll →
Payless Power
PTC 6 Month - Prepaid
26% Renewable
 18¢ 17.6¢ 17.4¢ 6 mo Enroll →
Pronto Power
Summer 2026
26% Renewable
 18¢ 18¢ 18¢ 2 mo Enroll →
Reliant
Reliant Power On Flex plan
24% Renewable
 19.3¢ 18.4¢ 17.9¢ Variable Enroll →

★ 1,000 kWh is the Texas standard usage benchmark. Rates include energy charge; TDSP delivery fees billed separately.

About ZIP Code 78664 — Round Rock — Downtown

ZIP code 78664 is part of the Oncor Electric electric delivery territory in Texas's deregulated electricity market. Residents and businesses in this area can freely choose their Retail Electric Provider (REP) from dozens of competing companies. Your Oncor Electric delivery charges stay the same regardless of which REP you select.

Other ZIP Codes in Dallas-Fort Worth & North Texas

78665786817872878727

← Back to Oncor Electric territory overview

Frequently Asked Questions about ZIP 78664

What is the cheapest electricity rate in ZIP code 78664?
The lowest available plan in ZIP 78664 today is Chariot Energy — GridPlus 12 at 7.5¢/kWh for 1,000 kWh usage. At 500 kWh usage the rate is 20.5¢/kWh and at 2,000 kWh it is 13.6¢/kWh. Rates are pulled live from licensed Texas REP plan data.
Who delivers electricity in ZIP code 78664?
ZIP code 78664 is served by Oncor Electric Delivery Company. Oncor Electric owns and maintains the local power lines and is responsible for restoring service during outages. Your energy rate is set by the Retail Electric Provider (REP) you choose — Oncor Electric charges are fixed delivery fees on your bill.
How do I switch electricity providers in ZIP code 78664?
Choose a plan in the table above and click "Enroll →". The entire process takes about 5 minutes online. Your Oncor Electric delivery service continues uninterrupted during the switch. If you are currently under contract, check your cancellation fee before switching — most REPs charge $50–$300 for early termination.