Lewisville electricity providers: 3 wires companies, 2 price lists

Three wires companies hold territory inside Lewisville’s city limits: Oncor, TNMP and CoServ. Two of them let you pick who sells you power.

Is Lewisville on Oncor or TNMP?

Both. Oncor’s tariff lists Lewisville among its cities, along with Flower Mound, Irving, Little Elm and The Colony. TNMP’s tariff also names Lewisville, plus Coppell. It does not name Irving, Flower Mound, The Colony or Highland Village.

A city on a tariff list can be served in part. TNMP’s own map of its North Texas area shows a small patch labeled Lewisville, not the whole city, and the map has no streets. TNMP’s 2025 report to the PUCT gives its address as 577 N. Garden Ridge Blvd., Lewisville.

We found no street-level map from any of the three companies. So we can’t say which Lewisville streets sit on which lines, and we won’t guess.

Pick the table for your wires company. Each ranks sellers by the state’s complaint rating first. Then type your monthly kWh and watch every simple 12-month plan reprice.

Companies selling over Oncor’s lines

Oncor’s list is the longer one. It has 43 companies in the table below, plus Think Energy.

Companies selling over TNMP’s lines

TNMP’s list has 41 companies in its table. Varsity Energy and Heritage Power list plans on Oncor’s lines only.

Missing a name you expected?

4Change Energy, Acacia Energy and Ambit Energy listed no plans on either set of lines on Oct 16, 2026. They may still sell through their own sites. Read our 4Change Energy, Acacia Energy or Ambit Energy review first, or scan the full list of Texas electricity companies.

Your price has two parts. Your seller sets one. Your wires company sets the other, and it runs $12.54 a month higher on TNMP’s lines than on Oncor’s at 1,000 kWh.

How much more does TNMP delivery cost?

At 1,000 kWh, TNMP’s delivery charge is $85.27 a month. Oncor’s is $72.73. That is $12.54 more a month, or $150.48 a year, our math. The gap grows with use. It is $8.02 at 500 kWh and $21.57 at 2,000 kWh.

What do plans cost on each list?

Power to Choose prices include delivery. The cheapest simple 12-month plan is $4 a month lower on TNMP’s lines than on Oncor’s, $116 against $120 at 1,000 kWh. The middle plan is the other way round. It costs $149 on TNMP’s list and $132 on Oncor’s, which is $17 more a month, or $204 a year.

So the spread is wider on TNMP’s list. From cheapest to middle, it is $33 a month there and $12 on Oncor’s list. Shopping pays off more on TNMP’s lines.

Why does TNMP have the cheapest plan if its delivery costs more?

Veteran Energy’s Basic 12 and Express Energy’s Speedy 12 both show 11.6¢ at 1,000 kWh on TNMP’s lines. That is 2.1¢ below the next simple plan, 13.7¢. We opened both labels. They were dated Oct 16, 2026, and each has an energy charge of 3.0510¢ per kWh and no base charge. TNMP’s delivery is passed through as billed.

On Oncor’s lines the same Veteran plan has an energy charge of 4.9645¢, or $19.14 more at 1,000 kWh. That more than cancels TNMP’s higher delivery, so the plan costs $6.60 less a month on TNMP’s lines. We don’t know why Veteran prices energy lower there.

Read the rest of Veteran’s label before you sign. The plan is for new customers only, and the exit fee is $20 for each month left. It is paperless, so a fee can apply if you don’t keep a valid email on file. The label also says your price can change if delivery charges change. Express Energy’s Speedy 12 shows the same prices and energy charge.

What does a typical Lewisville home pay?

No public source tracks a Lewisville-only bill. The EIA says a typical Texas home used 1,096 kWh a month in 2024. See the average Texas electric bill guide and Dallas electricity rates for wider numbers.

Power to Choose lists TNMP alone for ZIP 75029, and TNMP plus Oncor for 75057, 75067 and 75077. A ZIP can’t say which lines reach your house, so treat the answer as a first look.

• What the lookup shows. Three Lewisville ZIPs list both TNMP and Oncor. That means both companies hold territory in the ZIP. It doesn’t say which one wires your house.
• What it can’t show. CoServ isn’t in the lookup. A home on CoServ’s lines can’t pick a seller, even in a ZIP that lists plans.
• What we couldn’t confirm. Census files list no ZIP area for 75029 or 75027. That fits a P.O. box ZIP, but we couldn’t check it with the Postal Service. Try the ZIP printed on your street address.

Four ways to find your wires company

1. 1
   Read your last bill

   The delivery lines name your wires company. If CoServ sent the bill, CoServ is your electric company.

2. 2
   Check your ESI ID

   It is the long number for your meter. Its first 7 digits name the wires company. Oncor’s start with 1044372, and TNMP’s start with 1040051.

3. 3
   Use the companies’ own tools

   Oncor has an online ESI ID lookup by address. TNMP asks you to contact it for an ESI ID. CoServ links a territory map on its set-up page.

4. 4
   Match the fact label to your lines

   Each label is priced for one wires company. A plan’s Oncor label and its TNMP label show different prices, so read the one that matches your lines.

CoServ is an electric co-op based in Corinth. If it is your electric company, you can’t pick a seller, and the plan lists on this page are not for you.

CoServ’s site says it operates differently from retail electric companies, and that its “Members and Customers never need to shop around for a better deal.” Starting service costs a $40 connection fee. CoServ says the deposit depends on a credit check and “will not exceed $300.” Its Customer Care Center is 940-321-7800, Monday to Friday, 8 a.m. to 5 p.m. Central.

How much of Lewisville is CoServ territory?

CoServ publishes a map of its service boundary. We laid it over the Census city lines and measured land. About one-quarter of Lewisville, 25.8%, sits inside CoServ’s boundary. On 9.0% of the city, CoServ is the only company with a certificate. The rest of that quarter is shared with Oncor, TNMP or both. The other 74.2% is outside CoServ’s boundary.

That is why neighbors can sit on different lines. Highland Village’s new-resident page lists CoServ as its electric company, and CoServ alone holds the certificate on 95.3% of the town’s land. The Colony and Flower Mound are mostly shared land.

What about shared land?

In a shared area, we can only say that CoServ may serve you, which means no choice, or the other company may, which means you can shop. Only your bill, your ESI ID or the companies’ own lookups settle it. Our utility finder explains where to look.

Not always. Each neighbor mixes CoServ, Oncor and, in a few ZIPs, TNMP in its own way.

Lewisville stands out for renters. More than half  of its households rent, against 17.5% in Flower Mound and 8.1% in Highland Village. The ZIPs 75057 and 75067 run above 60%. If your lease includes power, or your landlord bills you for it, you can’t pick a company. Our apartment electricity guide explains each setup.

Moving in this week? The four-step setup guide and the same-day guide list the cut-off times. Irving, in the same metro, shows Oncor alone in every ZIP that lists plans. See our Irving electricity guide for that list.

It depends on your usage and your lines. TXU’s plan is far cheaper near 1,000 kWh. Reliant’s wins at 500 kWh. At 2,000 kWh, the winner flips with your wires company.

TXU listed one plan on each list, Smart 1000 Select 12. Its terms give a $100 bill credit in every billing cycle with 1,000 kWh of use or more, plus a $25 credit in billing cycles that end in July, August and September. That is why its price drops so far at 1,000 kWh. One kWh short, and the $100 is gone.

Reliant listed four plans on each list, from 9 to 24 months, and all are for new customers only. Its 12-month plan has no credit, so its price eases down slowly as use grows. Neither company has the lowest simple price on either list. Reliant’s 12-month plan costs $31 a month more than the cheapest on Oncor’s list and $50 more on TNMP’s, at 1,000 kWh.

Your seller can’t change how often the lights go out. Poles, wires and repair crews belong to your wires company, so that is where the outage numbers live.

Texas wires companies report two numbers to the PUCT each year. SAIFI is how many times the average customer loses power. SAIDI is how many minutes the average customer spends without it. Lower is better for both. The PUCT’s rule sorts outages into four kinds: forced outages, planned work, outside causes, and major events such as an extreme storm.

Count only forced outages, and Oncor had the fewest in 2025: 66.57 minutes per customer, against 89.65 for TNMP. Add all four kinds, and Oncor had the most, 244.14 minutes, because major events alone took 169.51. TNMP’s total, 160.98, was the lowest of the four companies. No company wins every count.

Which sellers get the fewest complaints?

The state rates nine companies 5 of 5 on both Lewisville lists: BKV Energy, Champion Energy, Constellation, Good Charlie, Infuse Energy, NEC Co-op Energy, Revolution Energy, Spark Energy and TXU Energy. The rating counts complaints per customer. It says nothing about outages, which are the wires company’s job.

Four of the nine have our scores: Champion 96, BKV 82, TXU 80 and Constellation 77. See every score we’ve given, and how to file a complaint.

It depends on your lines, your usage and how much fine print you will accept. Each pick uses the state’s complaint ratings, Oct 16, 2026 fact-label prices and our scores.

Found a company you like? Check it at your street address, then sign up in a few minutes.

Already have a plan? Leaving early can cost money. The steps are in how to switch electricity providers, and our Power to Choose guide explains the state’s site.

Call your wires company, not your seller. Save the right number before the next storm.

Your seller can’t turn power back on, so call it only about bills and plan terms. For a downed line, stay far away and call 911. Our outage guide lists the steps for a long outage.

Need help paying a Lewisville bill?

• Texas 211: call 2-1-1 or 877-541-7905, and a worker points you to local help.
• TDHCA’s CEAP: the state housing agency says its Comprehensive Energy Assistance Program helps low-income households with immediate energy needs. We couldn’t open a local agency list, so ask 2-1-1 where to apply.

Help can run out, and no program is certain to pay. Our guide to paying an electric bill in Texas lists more routes, and the no-deposit guide covers move-in costs.

Each check uses a document the company must show you or a public record.

1. 1
   Name your wires company first

   Oncor and TNMP versions of one plan carry different prices. CoServ homes can’t use these lists at all.

2. 2
   Price it at 500, 1,000 and 2,000 kWh

   A bill-credit plan can look cheap at one usage level and cost much more at another. TXU’s plan runs from $80 to $115 apart at 500 kWh.

3. 3
   Read the label’s date

   Oncor changed its delivery charge on Oct 4, 2026, and TNMP on Sept 13. A label from before can show a price that is too low.

4. 4
   Know the exit fee

   Some plans charge one flat fee, such as $100, $150, $200 or $300. Others charge $20 for each month left. A move with a forwarding address is exempt.

5. 5
   Know your 3 days

   Switching from another company? You can cancel free within 3 federal business days. A start at a new address doesn’t get that window.

Our fact label guide walks through the fine print of any plan. Fixed or variable? Start with fixed vs. variable rates.

Short answers from state records, company documents, Census data and the PUCT’s service-quality reports.

More guides for your lines, your bill or your next outage.

More guides: Every Texas electricity company · Cheapest plans this week · Plano electricity · Arlington electricity

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