Fixed-Rate vs. Variable-Rate Electricity Plans in Texas

For the vast majority of Texas households, fixed-rate electricity plans save more money over a 12-month period — typically 15–40% more than variable-rate plans, and sometimes dramatically more during summer heatwaves or winter freezes when wholesale electricity prices spike. Fixed-rate plans lock your price per kilowatt-hour for the full contract term (usually 12, 24, or 36 months), protecting you from market volatility. Variable-rate plans change monthly based on wholesale market conditions, offering flexibility with no early termination fees but exposing you to extreme bill spikes during peak demand periods. Variable plans only win in narrow scenarios: short-term rentals, bridge months between contracts, very low usage households, or unusual market conditions where wholesale prices are temporarily depressed.

Choosing between fixed and variable electricity plans is the single most consequential decision a Texas resident makes about their power bill. Get it right, and you lock in budget-friendly rates that weather the state's brutal summers and unpredictable winter storms. Get it wrong, and you could face monthly bills two or three times higher than your neighbor's — for identical consumption in an identical home.

Texas's deregulated electricity market creates genuine consumer choice, but it also creates genuine risk. Nearly 100 Retail Electric Providers (REPs) compete for your business, each offering plans structured around one of two fundamental pricing models. Understanding how these two models actually work — beyond the marketing — is the difference between a predictable power bill and a financial headache.

This comprehensive guide walks you through how each plan type works, when each saves you money, the real-world rate ranges you should expect in 2026, the hidden factors most comparison articles ignore, and the exact decision framework to identify the right plan for your specific household. No marketing fluff, no vague generalizations — just the information you need to make a defensible choice.

How the Texas Deregulated Electricity Market Works

Before comparing plan types, it's worth understanding the market structure that makes this choice necessary in the first place. In most US states, one regulated utility handles generation, transmission, and billing — you don't pick a provider because there isn't one to pick.

Texas is different. Under the deregulated structure that covers roughly 85% of the state (including Plano, Dallas, Houston, Fort Worth, Austin suburbs, and most of the ERCOT grid), the electricity supply chain is split into three layers:

1. Generators produce the electricity (natural gas plants, wind farms, nuclear, solar)

2. Transmission and Distribution Utilities (TDUs) like Oncor, CenterPoint, AEP Texas, and TNMP physically deliver the power through the wires to your home

3. Retail Electric Providers (REPs) sell you the electricity, handle your billing, and structure the plan you sign up for

The TDU is fixed by geography — if you live in Plano, Oncor delivers your power whether you like it or not. But the REP is your choice, and that's where fixed versus variable enters the picture. Every REP designs its plans around how it prices the electricity it buys wholesale and resells to you. That pricing decision determines your stability and your savings.

For a foundational primer on how Texas energy plans are structured from the ground up, our beginner's guide to energy plans and savings in Texas is an excellent starting point. This guide assumes you have the basics and dives into the plan comparison itself.

Fixed-Rate Electricity Plans: The Predictable Choice

A fixed-rate electricity plan locks your price per kilowatt-hour at a set value for the entire duration of your contract. If you sign a 12-month contract at 12.5¢/kWh, you pay 12.5¢ per kilowatt-hour of electricity consumption in month one, month six, and month twelve — regardless of what happens in the wholesale market.

How Fixed-Rate Plans Actually Work

When you sign a fixed-rate contract, your REP has essentially made a bet: they've estimated the average wholesale price they'll pay for electricity over your contract term, added their margin, and locked that rate in. If wholesale prices rise, they lose money on your contract. If wholesale prices fall, they make extra. That risk transfer is the entire value proposition for you as the consumer.

Typical contract structures:

• 6-month contracts (rare, often priced at a premium)

• 12-month contracts (the most common and usually best-priced tier)

• 24-month contracts (competitive, good for stable long-term residents)

• 36-month contracts (longer commitment, sometimes with rate ramps)

• 48- and 60-month contracts (niche, usually tied to promotional equipment like smart thermostats or solar)

Key contract terms to understand:

• Energy charge: The rate per kWh you pay for electricity itself

• Base charge: A flat monthly fee ($4.95 to $9.95 is typical) regardless of usage

• TDU delivery charges: Regulated pass-through fees that fund the physical delivery of electricity — these are separate from your REP and can technically change during your fixed term

• Early Termination Fee (ETF): The penalty for breaking your contract early, typically $150 to $295

Key Advantages of Fixed-Rate Plans

Predictability for budgeting: Your electricity bill is effectively a function of how much you use, not how the market is behaving that month. This is enormously valuable for households on fixed incomes, tight monthly budgets, or anyone who simply doesn't want bills as a source of stress.

Protection against extreme weather price spikes: Texas summers routinely push wholesale electricity prices through the roof as air conditioning demand maxes out the grid. Texas winters — as anyone who lived through February 2021 remembers — can do even worse. Fixed-rate customers are insulated from both.

Generally lower annual costs: Over a typical 12-month period in Texas, fixed rates produce lower total costs than variable rates more than 80% of the time. The savings often amount to hundreds of dollars per household annually.

Wide selection and competition: Fixed-rate plans are the bread and butter of the Texas market, so competition is fierce. Dozens of REPs offer nearly identical products, which keeps pricing honest.

Green energy options: Fixed-rate plans increasingly come in 100% renewable variants backed by Renewable Energy Certificates (RECs), typically at a premium of 0.5 to 1.5¢/kWh over standard plans.

The Drawbacks of Fixed-Rate Plans

Early Termination Fees: If you break your contract — because you move, change providers, or find a better deal — you'll pay an ETF of $150 to $295. For households that might relocate mid-contract, this is a real concern.

No upside if wholesale prices fall: If the market drops dramatically, you're still locked into your contracted rate. You can't take advantage of cheaper wholesale conditions.

TDU charges can still move: Even on a fixed-rate contract, the TDU delivery portion of your bill is regulated separately by the Public Utility Commission of Texas and can change during your contract term. These changes are typically small, but they explain why your monthly bill isn't always mathematically identical.

The post-contract trap: When your fixed term ends, your REP is legally required to notify you, but they can automatically roll you onto a month-to-month variable rate that's often 30–60% higher than the market. We'll return to this critical issue later in the guide.

Variable-Rate Electricity Plans: The Flexible Gamble

A variable-rate plan has no fixed contract term and no locked price. Your rate per kWh is recalculated every billing cycle based on your REP's current pricing — which is typically driven by wholesale market conditions, REP discretion, or a published index.

How Variable-Rate Plans Actually Work

On a variable-rate plan, you're essentially paying the current market rate (plus your REP's margin) every month. When wholesale prices are low — during mild spring and fall months, for example — your rate can be lower than your neighbor's fixed rate. When wholesale prices spike, so does your bill.

Structural features:

• No fixed contract term (fully month-to-month)

• No Early Termination Fee — you can leave any time

• Rate can change every billing cycle, sometimes dramatically

• Often marketed with attractive introductory "teaser" rates that reset after 1 to 3 months

The less-discussed third category: indexed-rate plans. Some plans marketed as variable are actually indexed — your rate is pegged to a specific published wholesale index (such as the ERCOT day-ahead market or a monthly natural gas benchmark) plus a fixed markup. Indexed plans can be cheaper than fixed in mild months but extremely punishing during grid scarcity events. They are not for the faint of heart.

When Variable Plans Can Make Sense

Short-term residents: If you're renting month-to-month, subletting, house-sitting, or in Texas temporarily for a contract job, the absence of an ETF makes variable plans the safer choice. Paying a $250 early termination fee on a 12-month fixed contract you'll only use for 4 months defeats the purpose.

Bridge months between fixed contracts: If your fixed contract ended during a period when new fixed rates are unusually high (summer peak, for example), going variable for 1–3 months while you wait for rates to settle can occasionally save money — though this is a gamble.

Very low usage households: If your monthly consumption is genuinely minimal (a small apartment, gas heat, extended travel), the impact of rate volatility on your total bill is small because your total bill is small.

Active market monitors: If you're the kind of person who checks wholesale electricity prices weekly and is willing to switch plans quickly when conditions change, you can occasionally beat fixed rates. Most people aren't, and shouldn't pretend they are.

The Serious Risks of Variable-Rate Plans

Market volatility: Texas weather is increasingly extreme, and wholesale electricity prices respond accordingly. A variable-rate plan exposes you fully to that volatility.

The summer and winter spike problem: During a typical August heatwave, wholesale prices can triple or quadruple over the course of a week. During extreme events, prices can rise 20x or more. Variable customers feel every bit of that movement.

Higher average costs over a full year: Despite the occasional monthly advantage, variable plans typically produce higher total annual costs than fixed plans for average Texas households. The summer and winter spikes more than wipe out any spring and fall savings.

Low stability, high stress: Bills arriving with 30%, 50%, or 100% increases from the prior month are emotionally and financially disruptive. For most households, that instability has a real cost beyond the dollars.

The Lesson From February 2021

Any honest comparison of Texas power rates has to reckon with Winter Storm Uri. In February 2021, a sustained Arctic blast pushed the ERCOT grid to the brink of total collapse. Wholesale electricity prices hit the regulatory cap of $9,000 per megawatt-hour — approximately 300 times normal — for multiple consecutive days.

Texans on indexed and certain variable-rate plans received catastrophic monthly bills. Some households received statements for $10,000, $12,000, even $16,000 for a single month. The Texas Legislature has since introduced reforms to curb consumer exposure to wholesale price spikes, but the structural reality of variable-rate plans remains unchanged: they transfer wholesale market risk to the consumer. When extreme events happen — and Texas weather makes them increasingly likely — that risk becomes a bill.

Fixed-rate customers during Uri paid exactly what their contracts said they would pay. They saw no change. That is not a coincidence; it is the entire point of a fixed-rate plan.

If you're choosing a plan in 2026, you're choosing in a market that has learned — painfully — that predictability has a real dollar value.

Side-by-Side: The Real Numbers

Here's how the two plan types stack up across the factors that actually matter:

Factor	Fixed-Rate Plan	Variable-Rate Plan
Typical rate range (2026)	11¢ to 16¢/kWh	9¢ to 22¢/kWh (with spikes higher)
Contract length	6 to 60 months	Month-to-month
Bill predictability	High	Low
Early termination fee	$150 to $295	None
Summer price spike protection	Full	None
Winter freeze protection	Full	None
Upside if wholesale prices drop	None	Modest
Best for	Long-term residents, stable households	Short-term renters, transitional periods
Risk level	Low	High
Average annual cost	Lower	Higher

Which Plan Type Wins for You? A Decision Matrix

Rather than a generic recommendation, work through this decision framework honestly:

Choose a Fixed-Rate Plan if You Meet ANY of the Following:

• You own your home or have a lease longer than 12 months

• Your household budget is tight and consistent monthly bills matter

• Your home is larger than 1,500 square feet

• Your home has electric heat, an electric water heater, or electric-only cooking

• You run heavy summer air conditioning (virtually every Texas home)

• You have a fixed income, young children, or other financial sensitivities

• You remember Winter Storm Uri and have no desire to repeat it

• You want to set up your electricity and not think about it for a year

For most Texas households, at least three of these items will be true. Fixed-rate is the correct answer.

Consider a Variable-Rate Plan Only if You Meet ALL of the Following:

• You're renting for less than 6 months

• Your monthly electricity usage is genuinely low (under 800 kWh)

• You can absorb a surprise bill increase without financial strain

• You actively monitor wholesale electricity prices

• You're willing to switch plans quickly if conditions change

If any of these points is "no," a variable plan is likely the wrong choice for you.

Definitely Avoid Variable Plans if:

• You've been burned by a high bill before — the math doesn't change

• Your monthly usage regularly exceeds 1,000 kWh

• You live in a region where summer temperatures routinely exceed 100°F

• You have any financial stress in your household

• You're unsure what you'd do if your bill doubled next month

How to Properly Compare Electricity Plans on PowerToChoose.org

Regardless of which plan type you choose, the practical comparison process is where most consumers go wrong. Here's the step-by-step approach that actually produces a good outcome:

Step 1: Gather Your Usage Data

Pull your last 12 months of electricity bills — or, if you're new to Texas, estimate based on home size:

• Small apartment: 500–800 kWh/month

• Small house or large apartment: 800–1,200 kWh/month

• Medium home: 1,200–1,800 kWh/month

• Large home: 1,800–2,500 kWh/month

• Very large home with pool: 2,500+ kWh/month

Step 2: Enter Your ZIP Code

Go to PowerToChoose.org — the official electricity plan comparison site operated by the Public Utility Commission of Texas — and enter your exact ZIP code. This filters out REPs that don't serve your address.

Step 3: Ignore the Default Sort

The default "lowest advertised rate" sort is deceptive. It surfaces teaser plans with aggressive usage-tier requirements. Instead:

• Filter for fixed-rate plans (if fixed is your choice)

• Filter for contract length (12 or 24 months for most households)

• Filter for renewable content if green energy matters to you

Step 4: Read Every Electricity Facts Label

The Electricity Facts Label (EFL) is a standardized, legally required disclosure that shows the effective rate at 500 kWh, 1,000 kWh, and 2,000 kWh of monthly usage. This is the most important document in Texas electricity shopping.

Red flag: If the three rates on an EFL are wildly different (for example, 18¢ at 500 kWh, 9¢ at 1,000 kWh, 13¢ at 2,000 kWh), the plan uses a bill-credit structure that rewards specific usage levels and punishes anything else. These plans are designed to look cheap in advertising and end up expensive in practice.

Green flag: An EFL where the three rates are similar (12.1¢, 11.8¢, 12.3¢, for example) indicates an honestly priced plan without usage-tier gimmicks.

Step 5: Read the Terms of Service

The TOS document contains the less glamorous but critically important details:

• Early termination fee amount

• Deposit requirements

• Contract length and expiration date

• Post-contract rollover rate and notification rules

• Auto-renewal clauses

Step 6: Check Customer Ratings

PowerToChoose displays aggregate customer ratings. Any provider rated under 3 stars has a reason. Read reviews before signing.

Step 7: Calculate Your Expected Monthly Bill

Using your actual projected usage, calculate the expected monthly cost:

• Energy charge (rate × usage)

• Base monthly fee

• TDU delivery charges (shown on the EFL)

• Any applicable bill credits

Compare several plans at your actual usage, not at advertised rates.

For a more Plano-specific walkthrough with local examples, our guide on how to compare electricity providers in Plano, TX shows this process with real regional data.

Short-Term Electricity Plans: When They Make Sense

Short-term electricity plans — 1-month, 3-month, and 6-month contracts — occupy a genuine niche in the Texas market, but one that most consumers don't need.

Good candidates for short-term plans:

• Summer interns and temporary workers

• Corporate relocations with uncertain duration

• House sellers in transition

• Bridge periods while house-hunting

• Short-term rental property owners between long-term tenants

Poor candidates:

• Anyone staying 12+ months (just take the fixed plan)

• Anyone trying to "time the market"

• Anyone who values bill predictability

Short-term plans typically carry a rate premium of 1–3¢/kWh over 12-month fixed plans. You pay for the flexibility. Whether that's worth it depends on the strength of your certainty about your tenure at the address.

The Post-Contract Trap: The Single Biggest Mistake Texans Make

Here's the issue almost no electricity plan comparison article warns you about — and it costs Texas households more money than almost any other factor.

When your fixed-rate contract expires, your REP is legally required to notify you. What they are NOT required to do is move you to a new competitive plan. Instead, they can automatically roll you onto a month-to-month variable rate that is often 30% to 60% higher than the market.

This is not a scam, technically. It's disclosed in the Terms of Service you agreed to. But it relies entirely on your inattention. Thousands of Texas households quietly pay premium rates for months — sometimes years — because they never got around to shopping for a new plan.

The fix is simple:

1. When you sign a new fixed contract, set a calendar reminder for 45 days before the contract end date.

2. When that reminder fires, shop new plans.

3. If the best new fixed offer is lower than what you're currently paying, switch (or call your current REP and ask them to match it).

4. If current market rates are higher, stay on your existing plan until it expires and negotiate from there.

This single habit will save most Texas households several hundred dollars annually. Our guide on 5 time-saving tips for hassle-free utility connections covers this and other contract management strategies in detail.

Renewable and Green Plans: Fixed vs. Variable with a Twist

Both fixed and variable plans are now available in 100% renewable energy variants, backed by Renewable Energy Certificates (RECs) from wind and solar generation. These green plans typically cost 0.5 to 1.5¢/kWh more than standard plans.

If green energy matters to you:

• A fixed-rate renewable plan gives you both price stability and clean energy backing

• Verify REC sourcing — some plans source credits from out-of-state generation, which arguably has less local grid impact than plans backed by Texas-generated wind and solar

• Check for bundled perks — some green plans include free smart thermostats, solar buyback options, or EV charging incentives

Common Pitfalls to Avoid

A handful of mistakes cause the majority of bad electricity plan experiences in Texas:

Choosing based on advertised rate alone: The advertised rate is often a usage-tier teaser. Always calculate expected cost at your real usage.

Ignoring the base charge: A plan with a 10¢ rate and a $9.95 base charge can easily cost more than a plan with an 11¢ rate and no base charge, especially for low-usage households.

Signing a 36-month contract when you might move: The ETF on a longer contract can wipe out years of savings if you leave early.

Not reading the TOS: Auto-renewal language, change-of-address procedures, and payment failure consequences all live here.

Allowing an expired contract to roll over: As covered above, this is the single biggest ongoing cost in Texas electricity shopping.

For a broader breakdown of costly mistakes, our guide on the top 5 mistakes to avoid when setting up utilities covers electricity selection among other common issues.

Frequently Asked Questions

Is it better to be on a variable or fixed energy tariff?

For most Texas households, fixed is substantially better. Fixed-rate plans protect you from summer and winter price spikes, enable accurate monthly budgeting, and historically produce lower 12-month total costs. Variable plans only beat fixed plans in narrow scenarios — very short occupancy periods, exceptionally low usage, or unusual market conditions. If you're staying at your address for 12 months or longer, fixed is almost always the right choice.

Who has the cheapest electricity per kWh in Texas?

The cheapest rate varies continuously by ZIP code, usage tier, contract length, and market conditions. REPs that consistently compete at the top of the Texas market include Gexa, Rhythm, 4Change Energy, Reliant, TXU, Frontier Utilities, and several others — but rankings change weekly. The correct approach is not to pick a brand; it's to use PowerToChoose.org, filter for your ZIP and preferred contract length, compare each plan at your actual usage on the Electricity Facts Label, and choose the best match.

What is better, fixed or variable rate electricity?

Fixed is better for stability, predictability, and long-term savings. Variable is better for flexibility and short-term tenancies. The defining questions are how long you'll stay at the address and how much bill volatility you can absorb. For stays of 12 months or more, fixed almost always saves money. For stays under 6 months, variable usually makes more sense due to the absence of an early termination fee.

How do I choose the best electricity plan in Texas?

Start by pulling your actual 12-month electricity usage history. Enter your ZIP code on PowerToChoose.org. Filter for fixed-rate plans of 12 or 24 months (for most households). Open the Electricity Facts Label on each shortlisted plan and compare the effective rates at 500 kWh, 1,000 kWh, and 2,000 kWh of monthly usage — they should be similar. Read the Terms of Service for early termination fees and auto-renewal language. Check customer ratings. Calculate your expected monthly bill at your real usage. Or use a free utility concierge service to handle all of this on your behalf.

What happens to my electricity plan when I move?

Your fixed-rate contract is tied to a specific address. When you move, the contract ends at the old address. Some REPs offer streamlined "move-with-us" processes that keep your account active at the new address without charging an early termination fee — ask before signing if mid-contract moves are a possibility. Other REPs will charge the ETF if you formally cancel. Always document the move with your REP, because failing to close the old account is how overlapping bills start.

Can electricity rates in Texas change during a fixed-rate contract?

The energy charge portion of your rate — the per-kWh price set by your REP — is locked for the full contract term. However, TDU delivery charges are set separately by the Public Utility Commission of Texas and can be adjusted during your contract. These changes are typically small. Legislative changes can also occasionally affect bills. That said, the bulk of your rate is locked, and the fixed-rate stability your contract provides is real.

What is a "month-to-month" electricity plan and is it safe?

A month-to-month electricity plan is a variable-rate plan with no fixed contract term. It's "safe" in the sense that you can leave anytime without an ETF. It's risky in the sense that your rate can change every month and can spike dramatically during peak demand periods. For short-term needs (1–3 months), month-to-month plans are appropriate. For longer-term use, they typically cost significantly more than fixed alternatives.

Do fixed-rate electricity plans have deposits?

Deposit requirements depend on your credit check, not the plan type. Customers with established credit history typically pay no deposit. Customers with limited credit history may be asked for deposits ranging from $100 to $400. Many REPs offer deposit-free plans regardless of credit.

Should I switch my electricity plan if I find a better rate mid-contract?

Generally, only if the savings from switching exceed the Early Termination Fee. Calculate: (months remaining × monthly usage × rate difference) versus the ETF. If the savings are substantially larger than the ETF, switching makes sense. If not, wait for your contract to end.

Are green energy plans worth the extra cost?

That depends on your personal values and your budget. A 100% renewable plan typically costs 0.5 to 1.5¢ more per kWh than a standard plan — so a household using 1,500 kWh/month pays $7.50 to $22.50 more per month for the green designation. If clean energy aligns with your values and your budget can absorb the premium, it's a meaningful way to support the growth of renewable generation in Texas.

The Verdict: Which Plan Saves More Money in Texas?

Over a full year of typical Texas residential consumption — roughly 12,000 to 18,000 kWh depending on home size and climate — fixed-rate electricity plans produce lower total costs more than 80% of the time. The savings are not marginal. They routinely amount to hundreds of dollars per household annually, with the gap widening during years with extreme weather events.

Variable-rate plans have legitimate use cases: short-term residency, genuine bridge periods, very low usage profiles. In those narrow scenarios, the absence of an early termination fee outweighs the rate volatility. But for the typical Texas household — staying put for a year or more, running heavy summer AC, and wanting to budget reliably — fixed is the mathematically correct answer.

The most costly mistake in Texas electricity shopping is not which plan type you choose; it's failing to manage your plan over time. Sign a competitive fixed-rate contract. Set a reminder 45 days before expiration. Shop again. Repeat. That discipline alone will save you more money than any other single electricity decision.

Don't Guess on Texas Power Rates — Compare Properly

Choosing the wrong electricity plan can cost you hundreds of dollars a year. Choosing the right one is a 20-minute exercise if you know what to look for — or a 5-minute conversation if you have the right help.

Utility Buddy offers a free Texas electricity plan comparison service that scans current fixed-rate and variable-rate plans from every major REP serving your address, matches them to your actual usage history, reads every Electricity Facts Label so you don't have to, and flags any contract traps before you sign. No commitment required, no cost to you because providers pay us directly.

Start your free plan comparison today to get matched with your best-fit electricity plan in minutes. Explore our complete suite of utility solutions to see how we simplify every part of your home services setup, or learn more about our mission and team.