Texas Variable Rate Power: When Fixed Plans Cost Less

The pitch for a variable-rate electricity plan is almost always the same: no long contract, no early-termination fee, and a price that can drop when the market softens. In deregulated Texas, that pitch collides with a wholesale market that can spike hard during heat waves and winter storms—and with a shopping culture that quietly rolls expired fixed contracts onto expensive month-to-month rates. For most households that plan to stay put for a year or more, the boring fixed-rate plan is not only safer. It is often cheaper over a full year of real bills.

That is not a slogan. It is what Texas regulators, consumer watchdogs, and hard winters keep teaching the same lesson: if your price can move every month, the months that hurt will usually erase the months that felt like a bargain.

How Competitive Electricity Works in Texas

In competitive areas of Texas, you do not buy poles and wires from the company whose logo is on your bill. You choose a ¹ that sells you energy. A transmission and distribution utility still delivers the power and maintains the lines—² for much of North Texas, and ³ around Houston, among others. The ⁴ regulates those delivery charges and requires standardized disclosures so shoppers can compare offers. It does not set the energy price your REP charges.

That split is why brand familiarity is a weak shopping strategy. In Houston, for example, outages are restored by the wires company, not by whichever retailer sent the bill, as the ³ has long explained to readers who assume a famous name means faster truck rolls.

The official comparison site for residential offers is ⁵, run for the PUCT. Certified providers list plans there at no charge to consumers. Outside those competitive footprints—many municipal utilities, cooperatives, and some areas outside the ERCOT-managed grid—you typically cannot pick among dozens of REPs the same way. The ⁶ notes that in Texas, customers of utilities connected to the ERCOT grid are generally required to choose an electricity provider, while retail choice is otherwise centered on investor-owned utility customers. Reporting during Winter Storm Uri also reminded readers that ⁷ sit outside that shopping model.

If you are in a choice area, the decision that usually moves your annual cost the most is not the logo. It is whether your cents-per-kilowatt-hour (¢/kWh) energy charge is locked or floating.

Fixed, Variable, and Indexed: What You Are Actually Buying

The PUCT describes three core product families on its ¹ page.

Fixed-rate plans lock the price per kWh for a contract period. That price can still change for narrow pass-through reasons the commission allows—transmission and distribution fee changes, certain ERCOT or Texas Regional Entity administrative fees, or new fees imposed by law that the REP cannot control. Usage still moves your total bill. What the fixed product is supposed to stop is the REP rewriting your energy rate every month because wholesale power got expensive.

Variable-rate (month-to-month) plans have no long contract and typically no cancellation fee, but the rate can change from month to month based on the market and the provider’s discretion. The upside is flexibility and the chance to ride prices down. The downside is that the same discretion works in the other direction when demand spikes or wholesale costs jump.

Indexed plans tie the retail price to a publicly available formula or index. In February 2021, products that passed through real-time wholesale prices became the cautionary tale of Texas retail choice. They are a different animal from a garden-variety “variable” month-to-month product, but both leave customers unhedged in ways a fixed contract does not.

Every competitive product must come with an ⁴—the nutrition-label equivalent for electricity. The EFL is designed for apples-to-apples comparison of prices and contract terms, including whether a plan is fixed or variable. Consumer guides also urge shoppers considering variable products to use the EFL’s historical-price link, because the opening rate on ⁵ will not tell you what next summer costs.

Read the EFL before you trust a headline ¢/kWh. A low advertised number that applies only at 2,000 kWh, or that assumes bill credits you will never hit, is not the same as a low bill at your actual usage.

When the Wholesale Market Hits Your Kitchen Table

Wholesale power in ERCOT is not a gentle seasonal curve. It is a market that can price scarcity in hours.

During Winter Storm Uri in February 2021, average wholesale electricity prices in ERCOT hit about ⁸ for the month—an outlier so large it pulled the entire year’s ERCOT average above 2022, according to EIA. Reporting by the ⁷ described how the PUCT allowed wholesale prices to rise to $9 per kilowatt-hour during the crisis, a 7,400% jump over a roughly 12-cent average, in an attempt to pull more generation online. Customers on plans that passed wholesale prices through felt that shock immediately.

The human-scale numbers were brutal. One teacher owed roughly $7,000 to Griddy for less than a week of service after years of summer bills that topped out near $150, the Tribune reported. Another customer’s bill spiked to about ⁹ against a normal $200–$250 monthly range. Griddy’s model charged a $10 monthly membership and passed wholesale rates directly to customers—cheap in mild markets, catastrophic when the offer cap sat at $9,000/MWh for days.

Fixed-rate customers were not immune to higher usage while homes reheated, and some later saw market costs reflected in future offers. But they were not billed at the spot price for every kilowatt-hour used during the freeze. That difference is the whole point of a fixed energy charge.

After Uri, policymakers cut the high system-wide offer cap. ¹⁰ notified market participants that the PUCT lowered the High System-Wide Offer Cap from $9,000/MWh to $5,000/MWh effective January 1, 2022. The lower ceiling reduces—but does not erase—scarcity pricing. In July 2022, a Texas heat wave still pushed wholesale prices at the ERCOT North hub to an average of ⁸ for the month as record demand met weak wind and more gas-fired generation came online.

You do not need another Uri for a variable plan to disappoint. A handful of expensive summer or winter months can wipe out a mild spring “deal.”

Why Fixed Plans Often Cost Less Over a Full Year

The math that makes variable look smart is usually a snapshot. The math that makes fixed look smart is a calendar.

First, Texas usage is seasonal. Cooling load in summer and heating load in cold snaps raise kilowatt-hours exactly when wholesale scarcity is more likely. A floating retail rate that rises into those months hits you twice: more kWh and a higher ¢/kWh. A fixed rate still charges for the extra usage, but it does not stack a discretionary rate hike on top.

Second, introductory variable rates can be teasers. The ³ warns that some variable products advertise tempting opening prices that can change after a month, and that Power to Choose listings alone will not tell you what you will pay next season. Historical price links on the EFL exist for a reason—use them.

Third, the quietest cost center in Texas retail is what happens when you do nothing. Fixed contracts end. If you ignore the expiration notice, many providers move you to a month-to-month product the company chooses—often a higher rate than anything a careful shopper would pick. The ² puts it bluntly for North Texas renters and homeowners: contracts commonly run one to three years, and when they wrap up you either find a new deal or get pushed into a month-to-month plan with even higher rates. Its Watchdog guidance is equally direct: only go with a plan that has a fixed rate; steer clear of variable.

Fourth, flexibility has a price even when nothing “goes wrong.” Variable plans spare you early-termination fees, which matters if you are moving in 60 days. For everyone else, that flexibility is an insurance policy you may be paying for every month through a higher expected rate path—especially if you do not actively re-shop when the rate creeps up.

None of this means every fixed plan beats every variable plan in every month. It means that for a household with a one-year or longer horizon, the all-in annual cost of a competitive fixed offer—read at your real kWh on the EFL—usually beats the gamble of floating through Texas weather.

How to Compare Plans Without Getting Played

Start at ⁵. Enter your ZIP code, filter for fixed-rate plans if that matches your situation, and compare average prices at the usage band closest to your history—often the 1,000 kWh column for a typical home, though apartments and large houses should use their own averages. Pull twelve months of kWh from old bills or your smart-meter data before you trust any default.

Then open the EFL and Terms of Service for shortlisted plans. Watch for:

• Monthly base or customer charges that raise the effective rate for low users
• Minimum-usage fees that punish conservation or vacant months
• Early-termination fees on contracts of a few months or longer
• Whether TDU delivery charges are included in the displayed average price
• What happens at contract end

The Chronicle primer notes that customers can typically switch without an early-termination fee if they schedule the change no earlier than 14 days before the current plan expires, and that providers should send notice before expiration. Put two reminders on your calendar: one about 60 days out to shop, and one about two weeks out to enroll so you never land on the holdover rate.

Term length is a separate decision from fixed versus variable. A ¹¹ both lock the energy charge for their terms; neither automatically saves more. Compare annualized cost at your usage, weigh early-exit risk if you might move, and match the term to whether you expect retail offers to fall (favor shorter) or stay elevated (favor longer if the EFL wins).

Complaint history on Power to Choose is worth a look. Reliability of the wires is the TDU’s job; answering the phone and handling billing is the REP’s.

Outside Texas: Choice States and Regulated Markets

Texas is the loudest retail-choice market in the country, but it is not the only one. EIA counts ¹² with active residential retail-choice programs, not including Texas, where choice is mandatory in ERCOT investor-owned utility areas under state law. In 2021, about 26% of eligible U.S. residential customers outside that Texas carve-out participated in retail choice—roughly 13.2 million accounts. Ohio’s residential participation rose from 45% in 2015 to 50% in 2021 in that same EIA analysis.

In voluntary-choice states such as Ohio and Maryland, the default is usually your utility’s standard offer or a similar default service. Competitive suppliers sell against that default. The risk profile still rhymes with Texas: a teaser variable or short-term offer can undercut the default for a while, then reprice. Fixed competitive contracts can beat a rising default—or lock you above a falling one. The same discipline applies: compare the full contract, not the first month, and know what happens when the term ends.

In fully regulated markets, you generally cannot pick a 12-month competitive supply contract. Your tools are different—budget billing, time-of-use rates if offered, efficiency upgrades, and participation in utility programs. The Texas-style “fixed versus variable REP plan” question does not apply the same way, even though wholesale costs still influence what regulators eventually approve in rates.

Wherever you live, ⁶ is a clean starting point: ask your distribution utility or state commission whether alternate suppliers are available and how delivery charges are billed.

A Practical Decision Framework

Use this as a working rule set, not a personality test.

Choose a competitive fixed-rate plan if you expect to stay at the address for most of the contract term, you want a predictable energy price through summer and winter peaks, and you are willing to re-shop before expiration. For most Texas households in choice areas, that is the default answer—and it is the answer consumer-facing coverage in Dallas and Houston keeps repeating for a reason.

Choose a variable or other month-to-month product only if your horizon is short (a lease ending soon, a home sale pending), an early-termination fee on a fixed plan would wipe out any savings, and you will actually watch the rate and switch when it moves. If you will not monitor it, you are not buying flexibility. You are buying drift.

Avoid products that pass wholesale prices straight through unless you fully understand scarcity pricing, have cash reserves for extreme months, and are prepared to switch providers quickly when the grid is stressed. Uri was not a theoretical case study. It was a retail product design meeting a $9/kWh wholesale world.

Never treat “do nothing” as a plan. Expiration notices exist because the default path after a fixed contract ends is rarely the cheapest path. Shop Power to Choose, read the EFL, lock a fixed rate that wins at your kWh, and calendar the renewal before the variable holdover does the choosing for you.

Variable power can look cheaper on a quiet Tuesday in April. Fixed power is what usually costs less when you add July, August, and the next polar blast—and when you refuse to donate an extra year of bills to an autopilot rate you never meant to keep.