Fixed-rate electricity plans lock in your price per kWh for the full length of your contract — typically 6, 12, or 24 months. That means your energy charge stays exactly the same whether summer demand spikes or wholesale prices surge. For Round Rock households on Oncor Electric, a fixed-rate plan is the single best way to protect your budget from price volatility and avoid bill shock during Texas heat waves.
All rates in ¢/kWh for ZIP 78664. Oncor Electric delivery fee billed separately. Updated daily from licensed Texas REP data.
| Provider / Plan | 1,000 kWh ★ | Term | Action |
|---|---|---|---|
| Energy Texas The Lone Saver Plus 12 100% Renewable |
8.2¢ | 12 mo | Enroll → |
| Octopus Energy Octopus Lite 12 100% Renewable |
9.8¢ | 12 mo | Enroll → |
| Amigo Energy Sustainable Simply Days - 6 31% Renewable |
12.5¢ | 6 mo | Enroll → |
| Just Energy Sustainable Living Bundle - 6 31% Renewable |
12.5¢ | 6 mo | Enroll → |
| Tara Energy Sustainable Home Bundle - 6 31% Renewable |
12.5¢ | 6 mo | Enroll → |
| True Power True Value 12 15% Renewable |
12.6¢ | 12 mo | Enroll → |
| Budget Power No Gimmicks Green 12 100% Renewable |
12.8¢ | 12 mo | Enroll → |
| Frontier Utilities Frontier Power Saver 12 30% Renewable |
12.8¢ | 12 mo | Enroll → |
| Varsity Energy Llc HOMERUN 12 31% Renewable |
12.8¢ | 12 mo | Enroll → |
| Gexa Energy Gexa Eco Choice 12 100% Renewable |
12.8¢ | 12 mo | Enroll → |
| Companion Energy Companion + Perks 12 30% Renewable |
12.8¢ | 12 mo | Enroll → |
| Chariot Energy Bright Nights 18 100% Renewable |
12.9¢ | 18 mo | Enroll → |
| Southern Federal Power Llc SoFed Free Energy Lunch - 12 6% Renewable |
13.2¢ | 12 mo | Enroll → |
| Sfe Energy Texas Inc SFE RewardsPlus - 12 35% Renewable |
13.2¢ | 12 mo | Enroll → |
| Constellation Newenergy Inc Simple Switch 7 26% Renewable |
13.5¢ | 7 mo | Enroll → |
| Ae Texas Smart Secure 36 35% Renewable |
13.5¢ | 36 mo | Enroll → |
| Abundance Energy Clean Energy 12 100% Renewable |
13.6¢ | 12 mo | Enroll → |
| Ap Gas & Electric (tx) Llc TrueClassic 18 6% Renewable |
13.7¢ | 18 mo | Enroll → |
| Texans Choice Power Llc Choose 12 37% Renewable |
13.7¢ | 12 mo | Enroll → |
| Think Energy Think Clean 12 with Smart Thermostat Connected 100% Renewable |
13.8¢ | 12 mo | Enroll → |
| Bkv Energy Daisy 13 29% Renewable |
13.8¢ | 13 mo | Enroll → |
| Pronto Power Summer 2026 26% Renewable |
13.9¢ | 2 mo | Enroll → |
| Rhythm Digital Choice 36 100% Renewable |
14.1¢ | 36 mo | Enroll → |
| Good Charlie & Co Llc GoodEnergy 36 26% Renewable |
14.2¢ | 36 mo | Enroll → |
| Revolution Energy Llc Stars and Stripes 36 24% Renewable |
14.3¢ | 36 mo | Enroll → |
| Cleansky Energy Embrace Green 36 - New Customer Special 100% Renewable |
14.3¢ | 36 mo | Enroll → |
| Ranchero Power Ranchero Fixed Prime - 48 6% Renewable |
14.4¢ | 48 mo | Enroll → |
| Spark Energy Llc Choose 15 37% Renewable |
14.4¢ | 15 mo | Enroll → |
| Champion Energy Services Llc Champ Saver-24 26% Renewable |
14.4¢ | 24 mo | Enroll → |
| Txu Energy Value Edge 12 3% Renewable |
14.5¢ | 12 mo | Enroll → |
| Base Power Base Energy 36 100% Renewable |
14.5¢ | 36 mo | Enroll → |
| Octopus Energy Llc Octo Simple 14 100% Renewable |
14.6¢ | 14 mo | Enroll → |
| Discount Power Saver 24 22% Renewable |
14.8¢ | 24 mo | Enroll → |
| Trieagle Energy Lp Sure Value 36 3% Renewable |
14.9¢ | 36 mo | Enroll → |
| Heritage Power Llc Bright Start 24 - $25 credit on your first bill! 25% Renewable |
15¢ | 24 mo | Enroll → |
| Cirro Energy Smart Simple 36 24% Renewable |
15.1¢ | 36 mo | Enroll → |
| Infuse Energy Essential Infusion 3 24% Renewable |
15.4¢ | 3 mo | Enroll → |
| Smartenergy Holdings Llc SmartGreen 24 $200 Bill Credit 100% Renewable |
15.5¢ | 24 mo | Enroll → |
| Atlantex Power Luminous 36 35% Renewable |
15.5¢ | 36 mo | Enroll → |
| Reliant Reliant Power On 12 Plan 24% Renewable |
15.7¢ | 12 mo | Enroll → |
| Green Mountain Energy Company Pollution Free e-Plus 12 Choice 100% Renewable |
15.9¢ | 12 mo | Enroll → |
| Direct Energy Autopay Texas 36 24% Renewable |
16.1¢ | 36 mo | Enroll → |
| Payless Power PTC 12 Month - Prepaid 26% Renewable |
17.4¢ | 12 mo | Enroll → |
★ 1,000 kWh is the Texas standard usage benchmark. Rates include energy charge; TDSP delivery fees billed separately.
Fixed pricing gives you predictability. You know exactly what you'll pay per kWh the day you enroll — and that rate doesn't change until your contract ends. This is especially valuable in Round Rock, where August temperatures routinely push electricity demand (and spot prices) to their highest levels of the year. Most fixed-rate plans also include a straightforward cancellation fee, so you can switch if a better deal appears.
Compare by what matters most to you.