Lewisville Electricity: an Oncor Market with a Co-op Inside the City Line
Compare plans in Lewisville by estimated monthly cost at your usage, with Oncor delivery charges included.
Estimated costs are informational. Provider rates and plan terms may change. Confirm current details directly with the provider.
Live eligible-plan inventory — Oncor territory; the same active, validation-clean, fresh plan set the compare tool ranks, with TDSP delivery charges included. Rate and bill figures cover standard-priced plans only (free-period and time-of-use plans are counted in inventory but excluded from rate figures). Source: daily EFL capture of the state plan feed; refreshed with this page about every 6 hours. Confirm current rates with the provider before enrolling.
Top Electricity Plans in Lewisville (Ranked by Real Monthly Cost)
Plans below are ranked by estimated total bill including Oncor delivery charges. Enter your actual monthly kWh for personalized results and confirm final details with the provider.
| # | Plan | Provider | Rate (1,000 kWh) | Est. bill (1,000 kWh) | Term | Fine print |
|---|---|---|---|---|---|---|
| 1 | Sure Saver 12 | SPARK ENERGY LLC | 6.4¢/kWh | $64/mo | 12 mo | Credit cliff at 1,000 kWh, $100 cancel fee |
| 2 | SimpleSaver 12 | AP GAS & ELECTRIC (TX) LLC | 6.5¢/kWh | $65/mo | 12 mo | Credit cliff at 1,000 kWh, $150 cancel fee |
| 3 | The Lone Saver Plus 12 | Energy Texas | 6.8¢/kWh | $68/mo | 12 mo | Credit cliff at 1,000 kWh, $20 cancel fee |
| 4 | Rhythm Max Saver 24 | RHYTHM | 7.3¢/kWh | $73/mo | 24 mo | Credit cliff at 1,000 kWh, $20 cancel fee |
| 5 | Variable Advantage | SOUTHERN FEDERAL POWER LLC | 8.9¢/kWh | $89/mo | 1 mo | Variable rate |
Estimated bills include Oncor delivery charges. Confirm final pricing on the provider's Electricity Facts Label before enrolling. Use the interactive comparison below to rank all 155 plans at your own usage, or the full comparison tool.
Lewisville is an Oncor-served city — it appears in Oncor's own retail-delivery city list — and most of its households shop the standard deregulated market like their neighbors in Carrollton or Plano. But southern Denton County is also CoServ country, and the co-op's certificated territory reaches inside Lewisville's city limits: Castle Hills, the master-planned community the city annexed in 2021, is CoServ-served, and CoServ members buy power from the cooperative with no retail market at all. That makes Lewisville a city where the municipal boundary and the utility boundary genuinely disagree — the honest first step here isn't a rate chart, it's confirming which utility's wires reach your meter, because the answer decides whether plan shopping applies to you.
Lewisville mixes a large apartment inventory near I-35E and Lake Lewisville with established 1970s–1990s single-family neighborhoods in Old Town and the south side — a renter-heavy market with wide usage spread.
Lewisville Electricity Rates — August 2026
Weekly standard-priced market index — Oncor territory, snapshot from the week of August 31, 2026. Unlike the live inventory above, rate figures here exclude free-period and time-of-use plans.
In the week of August 31, 2026, 164 standard-priced plans from 41 providers were on the market in Oncor territory. At 1,000 kWh, the cheapest works out to 6.6¢/kWh all-in (about $66 for the month), and the territory average is 13.2¢/kWh — down 0.8¢ vs the week of August 3, 2026. All figures include Oncor delivery charges.
| Monthly usage | Cheapest rate | Average rate | Cheapest est. bill | Average est. bill |
|---|---|---|---|---|
| 500 kWh | 9.5¢/kWh | 14.0¢/kWh | $47/mo | $70/mo |
| 1,000 kWh | 6.6¢/kWh | 13.2¢/kWh | $66/mo | $132/mo |
| 2,000 kWh | 8.5¢/kWh | 13.1¢/kWh | $170/mo | $262/mo |
Standard-priced plans in the Oncor service territory tracked in the TrueBill database, weekly snapshot from August 31, 2026. Rate = estimated all-in monthly bill (energy + Oncor delivery charges) divided by usage — the same average-price definition the Electricity Facts Label uses. Time-of-use and free-period plans are excluded from rate figures. Oncor delivery charges are identical across the territory, so these rates apply to Lewisville addresses served by Oncor. Plan pricing changes often — confirm current terms with the provider.
See how Texas electricity rates have trended · Monthly Texas market reports
Provider Rates on the Oncor Grid This Week
Lowest and average all-in rates per provider at 1,000 kWh, from the snapshot for the week of August 31, 2026.
| Provider | Plans | Lowest rate | Avg rate |
|---|---|---|---|
| AP GAS & ELECTRIC (TX) LLC | 7 | 6.59¢ | 11.18¢ |
| SPARK ENERGY LLC | 5 | 6.92¢ | 10.62¢ |
| SOUTHERN FEDERAL POWER LLC | 5 | 8.90¢ | 14.37¢ |
| Octopus Energy | 6 | 9.06¢ | 10.89¢ |
| TARA ENERGY | 5 | 10.23¢ | 13.09¢ |
| AMIGO ENERGY | 5 | 10.23¢ | 16.25¢ |
| JUST ENERGY | 4 | 10.23¢ | 13.83¢ |
| Companion Energy | 2 | 10.60¢ | 11.10¢ |
| Rhythm Energy | 4 | 10.64¢ | 11.74¢ |
| Energy Texas | 4 | 10.64¢ | 12.09¢ |
Rates are EFL average prices at 1,000 kWh including Oncor delivery charges. This is territory-level data — identical for every city on the Oncor grid, because providers price by TDSP territory, not by city. Full history on the Texas rate history page.
Local planning angle for Lewisville
A city's primary utility, an address's retail-choice eligibility, and the exact utility at a specific meter are three different questions in Lewisville — Oncor answers the first for most of the city, but only an address-level check answers the last, especially in newer northern and eastern sections near CoServ's boundary. Your current electric bill settles it instantly: a CoServ bill means co-op membership and no retail market; a bill from a retail provider means Oncor delivery and full choice.
Who Delivers Electricity in Lewisville
Oncor (your delivery utility)
Oncor owns and maintains the poles, wires, transformers, and meters in Lewisville. They handle outages and infrastructure, but they do not sell electricity plans. You choose a retail provider separately, and Oncor delivers the power regardless of which provider you pick.
Oncor's delivery charges are the same for every customer in Denton County, regardless of retail provider. TrueBill includes these charges in every estimate.
Review Oncor TDSP delivery charges and service-area details →Most Lewisville addresses are on Oncor's grid with full retail choice. The CoServ electric cooperative serves Castle Hills within the city, plus most of neighboring Flower Mound and Highland Village and much of central Denton County — co-op members cannot choose a retail provider. The boundary doesn't follow major streets, so for addresses in Lewisville's northern and eastern tiers, verify with your bill or an address-level check before comparing plans.
Typical Electricity Usage in Lewisville
Lewisville homes often use significantly more electricity during summer cooling months than during the rest of the year.
That seasonal swing changes plan economics: bill credits, minimum usage fees, and usage-based pricing can behave very differently as monthly usage moves up and down.
TrueBill ranks plans using your actual usage profile whenever possible instead of relying only on the standard 1,000 kWh benchmark.
Estimated profile derived from Lewisville seasonal ranges and Oncor service-area usage patterns.
What to Check Before Picking a Plan in Lewisville
Some plans only apply a credit if you use, say, 1,000 kWh or more in a month. Miss the threshold and your bill can jump. Check where your usage lands in every month, not just summer.
Rates can change across usage bands, so the advertised rate may only apply at one usage level. Compare estimated cost at your expected usage, not just the 1,000 kWh benchmark.
A monthly base charge or a fee for using too little can outweigh a low per-kWh rate, especially in smaller homes and apartments.
Longer contracts lock in your rate but usually carry a cancellation fee. Check the term and the fee in the plan's EFL before you sign up.
TrueBill factors these plan structures into every estimate. Plan terms can change, so confirm details with the provider before enrolling.
Frequently Asked Questions About Electricity in Lewisville
Is Castle Hills part of Lewisville's electricity market?
How do I know whether my Lewisville address is Oncor or CoServ?
My neighbor a street over can't switch providers but I can — how is that possible in Lewisville?
Can I switch electricity providers in Lewisville?
How do Oncor delivery charges affect my total Lewisville electricity bill?
What is the difference between the Oncor delivery charge and the energy charge on my Lewisville electricity bill?
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Estimated costs are informational. Provider rates and plan terms may change. Confirm current details directly with the provider.