Texas Advertised Rate vs Real Bill: How to Compare True Plan Cost
The postcard says 9.8¢ a kilowatt-hour. The bill that shows up six weeks later does not feel like 9.8¢. That gap is common in competitive electricity markets, and it is usually math—not a secret conspiracy. Advertised rates compress a messy monthly invoice into one friendly number. Your real bill still includes regulated delivery, flat fees, usage rules, taxes, and contract mechanics the headline never fully explains.
If you are shopping, switching, or renewing—especially in deregulated Texas, but also in choice states like Ohio and Maryland—the useful skill is not hunting the lowest sticker. It is learning what that advertised cents-per-kWh figure includes, what usage it assumes, and what still lands on your statement separately.
The Advertised Rate Is a Label, Not Your Invoice
Online shopping tools sort plans by cents per kilowatt-hour (kWh). That format makes dozens of offers comparable at a glance. It is also nothing like the total amount due on your statement. A kWh is simply how usage is metered—one kilowatt of power used for one hour—and your bill multiplies that usage by rates, then adds charges that may not be per-kWh at all.
Nationally, the U.S. Energy Information Administration explains that ¹, not a single “energy only” number. In 2025, EIA put the U.S. annual average retail price at about ¹—higher than commercial or industrial classes because delivering smaller volumes to homes costs more per unit. Those averages still will not match your house in July.
In Texas, comparison starts with the official marketplace. The Public Utility Commission of Texas (PUCT) points shoppers to ², the commission’s site for comparing retail plans in competitive areas. Power to Choose itself stresses that you should ³—and remember seasonal swings—before you trust any ranking. Third-party explainers make the same point in plainer language: an ⁴, not a promise that your bottom line will match the ad.
Shoppers get burned when they treat the marketing rate as an all-in guarantee. The ad is doing compression work. Your invoice is doing accounting work. Those jobs are related, but they are not the same.
Two Companies, One Bill: Retail Supplier vs. Wires Utility
Texas restructured most of its retail market so many customers can choose a Retail Electric Provider (REP) while the physical delivery system stays put. Power to Choose’s FAQ puts the split clearly: people in deregulated areas ⁵, while the same wires companies—Transmission and Distribution Utilities, or TDUs—continue to deliver power, read meters, and maintain poles and lines. Reliability is not supposed to change when you switch retailers, because the regulated wires company serving your address does not change with the brand on the supply line.
That structure is why a low “energy charge” can still produce a stubborn total. Supply charges come from the REP you selected. Delivery charges are regulated TDU fees passed through on the bill. Taxes and assessments sit on top. ⁶, the largest delivery company in Texas, states plainly that it does not generate power, set your retail plan, or send monthly bills—your address determines the TDU, while you choose the REP. Oncor also explains that it ⁷; the REP then bills you for both energy and those delivery amounts, often labeled as wires or TDU charges.
Federally, EIA’s delivery primer matches the same physics: ⁸, and in some states customers buy from a power marketer while a local utility still delivers. WattKarma’s TDU explainers translate that for Texas shoppers: ⁹ in a given service territory, and ¹⁰—not a gimmick invented to pad the bill. In Houston, that wires role typically belongs to CenterPoint Energy, which ¹¹ while your chosen retailer sells the kilowatt-hours.
Not every Texan shops this way. Power to Choose notes that ⁵. If your ZIP returns no plans, you are likely on a bundled utility bill. The cost stack still includes generation and delivery; you just do not pick them separately.
The Electricity Facts Label Is the Real Comparison Tool
Texas requires an Electricity Facts Label (EFL) for every competitive plan. The PUCT describes the EFL as a ¹² that supports apples-to-apples comparison. Power to Choose’s glossary calls it the fact sheet with ¹³. Electric companies must provide an EFL for each plan, and Power to Choose tells shoppers that is how you ⁵.
Practically, the number that matters is the average price per kWh at usage levels near yours—commonly shown at 500, 1,000, and 2,000 kWh for residential products. WattKarma’s shopping guides emphasize that the EFL’s average price ¹⁴, and that you should ¹⁵. Power to Choose’s user guide adds an operational rule: after you filter plans, ³ before you enroll. The same guide lets you ³ if you want a cleaner comparison set.
Ads rarely print the full EFL. They print the yield—one average ¢/kWh at a usage tier that makes the plan look competitive. That is useful ranking math. It is still someone else’s usage story until you overlay your own bills. If the three EFL averages sit within a few tenths of a cent of each other, the plan is usually easier to reason about. If they diverge sharply, something structural—credits, tiers, or fees—is moving the average with usage.
Usage Tiers, Credits, and Minimum Fees Change the Math
The most common reason a great ad meets a mediocre bill is that the ad assumes a kWh band you did not hit.
Many plans charge extra when usage falls below a threshold. Power to Choose warns that ⁵, often labeled a minimum usage fee, and that the fee ¹³—you catch it on the EFL. The same glossary defines a ¹³. At 500 kWh, flat dollars smash the average harder than they do at 2,000 kWh. WattKarma’s Houston cost guide walks through that arithmetic: ¹⁶, while high-usage months make the energy rate dominate.
Bill credits work the other direction. A plan can look spectacular at 1,000 kWh because a large credit only applies in a narrow band. Miss the band—mild weather, vacation month, or an apartment that never clears the threshold—and the effective rate jumps. WattKarma’s comparison advice is blunt: ¹⁵ unless your history actually hits it.
Seasonality compounds the problem. Power to Choose’s shopping guide reminds Texans that ³. In Greater Houston, WattKarma notes that ¹¹ for many homes—so ranking plans only at a spring-like 500 kWh column can be misleading. Statewide, WattKarma also notes that many Texas homes ¹⁴, though apartments, large homes, and all-electric setups can sit far outside that band.
Time-of-use products add another assumption layer. Power to Choose explains that average prices for those plans on the EFL and shopping site ¹³. If you do not shift laundry, EV charging, or pre-cooling into the cheap window, ¹³ relative to a simple fixed plan. The plan is not lying. Your schedule is just not the schedule baked into the average.
Fixed, Variable, Indexed, and Prepaid: What “Locked” Actually Means
Contract design changes what an advertised rate means over months, not just at signup.
¹⁷ keep the price per kWh from changing during the contract term, with important exceptions: transmission and distribution fee changes, certain ERCOT or Texas Regional Entity administrative fees, and new laws that impose costs beyond the REP’s control. That is useful for budgeting. It is not a promise that every line on your bill freezes.
¹⁷ can move month to month with market conditions and the retailer’s discretion—upside when prices fall, risk when weather or tight markets spike costs. ¹⁷ tie the rate to a public index through a disclosed formula; treat any ad snapshot as a point-in-time reading, not a forecast. Power to Choose also notes that many term contracts ¹⁷, and that default price will likely be much higher—so renewals are part of true cost, not an afterthought.
Prepaid service is a different product category: ¹⁷, generally higher rates than postpaid, and disconnection risk if the balance runs low. Renewable marketing needs the same skepticism as price marketing: the EFL lists renewable percentage, and Power to Choose notes that providers may designate some Texas natural-gas products as “green,” so ¹⁷.
None of these designs is inherently bad. They are different products wearing similar marketing clothes. Customer protections sit alongside pricing. Power to Choose lists required disclosures—including the EFL, Terms of Service, and expiration notices—and reminds customers that ⁵. If a total looks wrong after you switch, start with your REP; unresolved disputes can go to the PUCT consumer hotline listed on those pages.
What Your Real Bill Actually Stacks
When the statement arrives, translate it into categories instead of staring at the total.
Most bills show account details and a usage summary in kWh, then break out charges. WattKarma’s bill walkthrough groups the usual pieces as ¹⁸. In competitive Texas, the supply half is the competitive choice; the delivery half is the regulated wires company. Oncor’s customer explainer repeats the operational rule: ⁷, while outages go to the TDU. Power to Choose makes the same outage point: ⁵, whose number appears on your bill.
EIA’s price primer is a useful national checkpoint for expectations: ¹, and some states fully regulate prices while others combine competitive generation pricing with regulated transmission and distribution. That regulatory mix is why a “cheap energy rate” cannot erase wires investment, storm hardening, or metering costs that regulators approve for the TDU.
Early termination fees and deposits are not in the cute ¢/kWh ad either. WattKarma notes that ¹⁴, and Power to Choose explains that ¹⁷ based on payment or credit history. Those cash items belong in any true-cost comparison if you might move, break a contract, or start service with thin credit history. Switching itself generally has ⁵ unless you request a special meter read, but breaking an existing REP contract can still cost you.
Outside Texas: Same Lesson, Different Paperwork
Readers in Ohio, Maryland, and other choice markets will recognize the conceptual split even when line labels differ: a supplier charge and a utility delivery charge on a consolidated bill. EIA’s delivery overview is the portable mental model—⁸. Fully regulated territories fold generation and delivery into one utility rate, so you will not see Power to Choose-style shopping, but you still pay for both halves of the system.
WattKarma’s Texas-focused explainers still help non-Texas readers with the habit: ¹⁰. The paperwork name changes; the habit does not. Never compare marketing energy rates across products without reading the full disclosure for your usage. In Texas that disclosure is the EFL. Elsewhere it may be an offer summary, tariff sheet, or utility rate schedule.
A Practical Checklist for True Plan Cost
Treat advertised rates as the start of the homework, not the finish.
- Pull 12 months of kWh from bills or your online account. Note summer peaks and mild-month lows, as ³.
- For each finalist plan, open the EFL and write down average prices at 500, 1,000, and 2,000 kWh. Circle the band closest to your reality, following the approach in ¹⁶.
- Check for base charges, minimum usage fees, and bill credits that only apply in a narrow band—⁵ are explicit that these traps hide in the label more often than on the monthly invoice.
- Confirm what is fixed versus pass-through. Even fixed energy rates can move with ¹⁷.
- Read the Terms of Service for contract length, early termination fees, and what happens at expiration—especially the risk of rolling onto a higher month-to-month rate.
- Match plan type to behavior. Stable households often prefer fixed. Flexible switchers may accept variable. Night-heavy users should stress-test time-of-use assumptions against real schedules, not the REP’s estimated split.
- Shop official listings first via ², then use broker tools if you want filtering help—always verifying flashy numbers against the EFL.
Bottom line: Texas ads sell a standardized average for a stylized month. Your real bill is supply plus regulated delivery plus fees and taxes, scaled by your usage and your contract mechanics. Compare with your kWh history in hand, and the gap between ad and invoice stops feeling like a surprise—and starts looking like math you can control.