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 Texas Power to Choose.
| Provider / Plan | 1,000 kWh ★ | Term | Action |
|---|---|---|---|
| Tara Energy Sustainable Home Bundle - 3 31% Renewable |
9.1¢ | 3 mo | Enroll → |
| Frontier Utilities Frontier Power Saver 3 30% Renewable |
9.1¢ | 3 mo | Enroll → |
| Amigo Energy Sustainable Lifestyle - 3 31% Renewable |
9.1¢ | 3 mo | Enroll → |
| Gexa Energy Gexa Eco Choice 3 100% Renewable |
9.2¢ | 3 mo | Enroll → |
| Energy Texas The Lone Saver 12 100% Renewable |
9.7¢ | 12 mo | Enroll → |
| Chariot Energy Bright Nights 15 100% Renewable |
12.6¢ | 15 mo | Enroll → |
| Octopus Energy Llc Octo Simple 3 100% Renewable |
12.8¢ | 3 mo | Enroll → |
| Companion Energy Companion + Perks 12 30% Renewable |
13¢ | 12 mo | Enroll → |
| Budget Power No Gimmicks Green 12 100% Renewable |
13.1¢ | 12 mo | Enroll → |
| Ap Gas & Electric (tx) Llc TrueClassic 12 6% Renewable |
13.4¢ | 12 mo | Enroll → |
| Texans Choice Power Llc Choose 6 35% Renewable |
13.5¢ | 6 mo | Enroll → |
| True Power True Value 24 15% Renewable |
13.5¢ | 24 mo | Enroll → |
| Discount Power Saver 15 21% Renewable |
13.6¢ | 15 mo | Enroll → |
| Branch Energy (texas) Llc Branch Fixed 12 100% Renewable |
13.6¢ | 12 mo | Enroll → |
| Cirro Energy Smart Simple 15 21% Renewable |
13.7¢ | 15 mo | Enroll → |
| Abundance Energy Clean Energy 12 100% Renewable |
13.8¢ | 12 mo | Enroll → |
| Infuse Energy Essential Infusion 6 26% Renewable |
13.8¢ | 6 mo | Enroll → |
| Spark Energy Llc Choose 12 35% Renewable |
13.9¢ | 12 mo | Enroll → |
| Rhythm Digital Choice 12 100% Renewable |
13.9¢ | 12 mo | Enroll → |
| Bkv Energy Daisy 12 29% Renewable |
13.9¢ | 12 mo | Enroll → |
| Txu Energy Value Edge 12 3% Renewable |
13.9¢ | 12 mo | Enroll → |
| Revolution Energy Llc Stars and Stripes 18 26% Renewable |
14¢ | 18 mo | Enroll → |
| Cleansky Energy Embrace Green 24 - New Customer Special 100% Renewable |
14¢ | 24 mo | Enroll → |
| Ae Texas Smart Secure 36 35% Renewable |
14.3¢ | 36 mo | Enroll → |
| Octopus Energy Octo Simple 18 100% Renewable |
14.3¢ | 18 mo | Enroll → |
| Heritage Power Llc Bright Start 24 - $25 credit on your first bill! 25% Renewable |
14.5¢ | 24 mo | Enroll → |
| Champion Energy Services Llc Champ Saver-12 26% Renewable |
14.5¢ | 12 mo | Enroll → |
| Good Charlie & Co Llc GoodEnergy 36 26% Renewable |
14.6¢ | 36 mo | Enroll → |
| Trieagle Energy Lp Simple Savings 12 3% Renewable |
14.8¢ | 12 mo | Enroll → |
| Direct Energy Autopay Texas 12 24% Renewable |
14.9¢ | 12 mo | Enroll → |
| Green Mountain Energy Company Pollution Free e-Plus 36 Choice 100% Renewable |
15.1¢ | 36 mo | Enroll → |
| Southern Federal Power Llc SoFed Try Us Out - 48 6% Renewable |
15.3¢ | 48 mo | Enroll → |
| Ranchero Power Ranchero Fixed Prime - 48 6% Renewable |
15.4¢ | 48 mo | Enroll → |
| Just Energy Basics PTC - 60 31% Renewable |
15.5¢ | 60 mo | Enroll → |
| Think Energy Think Clean 36 100% Renewable |
15.5¢ | 36 mo | Enroll → |
| Reliant Reliant Power on 36 Plan 24% Renewable |
15.8¢ | 36 mo | Enroll → |
| Constellation Newenergy Inc 12 Month A/C Protect Plus for 2 Units 26% Renewable |
16.3¢ | 12 mo | Enroll → |
| Atlantex Power Luminous 36 35% Renewable |
16.3¢ | 36 mo | Enroll → |
| Payless Power PTC 6 Month - Prepaid 26% Renewable |
16.3¢ | 6 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.
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