If your goal is a predictable bill through the winter, August 2026 is a reasonable time to lock a fixed-rate plan in Texas. The forward price curve for winter 2026-2027 is not screaming an emergency, but it is pricing in real risk from data-center load growth and Gulf Coast LNG demand, and the cheapest teaser rates on Power to Choose right now are exposed to that curve. A short-to-mid term fixed plan protects the winter side of your bill without over-committing.

Key takeaways

• ERCOT's summer 2026 peak demand forecast is 92,211 MW, about 8% above the August 2023 record of 85,464 MW, per ERCOT.
• Henry Hub natural gas futures are forecast at $4.31 per MMBtu in 2026 and $4.38 in 2027, up from $3.52 in 2025, per EIA.
• Under EIA's high-demand ERCOT scenario, 2027 North-hub wholesale power prices rise from $47.39 per MWh to about $84.80, a 78.9% jump, per Utility Dive.
• August 2026 residential Texas fixed rates run from about 6.0 to 11.8 cents per kWh on 12-month plans, and up to about 18.3 cents on prepaid, per Power to Choose listings.
• Locking a fixed rate is a bill-certainty decision, not a bet that today's rate is the absolute cheapest point in the market.

What the ERCOT forward price curve actually tells you

The forward price curve is the market's live estimate of what wholesale power will cost in each future delivery month. Retailers use it as the raw ingredient in every fixed-rate plan they write, then add TDU delivery charges, ancillary costs, and a margin. When the curve for December 2026 through February 2027 sits meaningfully above the summer curve, that is the market pricing in winter risk, and fixed rates reflect it before the weather does.

Three signals matter right now. Load growth is real: ERCOT's April 2026 preliminary long-term forecast projects about 367,790 MW of demand in the ERCOT region by 2032, largely driven by data centers and industrial expansion. Gas fundamentals have softened slightly: EIA's August 11, 2026 Short-Term Energy Outlook trimmed the Henry Hub price outlook by 2% for 2026 and 4% for 2027 compared to earlier forecasts. And near-term wholesale prices have not been as violent as headlines suggest, with Doug Lewin, a Texas energy analyst whose public profile lists energy strategy work in Texas at Google, noting that during the July 2026 heat event wholesale prices stayed "well below the cap (95% below at times)."

Two of those signals argue for patience. One argues for prudence. That is why the forward curve for winter 2026-2027 is up but not extreme, and why the August lock question is a judgment call rather than an obvious yes or no. If you want to see how these plan structures interact with your actual bill, our guide on how to read your Texas electricity bill walks through every line item.

Where fixed and variable rates sit on Power to Choose this August

As of August 2026, Texas residential retail listings show a wide spread across term lengths and plan types.

• 12-month fixed plans start at about 6.0 cents per kWh at the low end and reach roughly 10.4 to 11.8 cents per kWh at the higher end, depending on ZIP code and provider.
• 24-month fixed plans sit in the 6.8 to 7.6 cents per kWh range in most sampled markets.
• 36-month fixed plans run 13.1 to 14.0 cents per kWh in several ZIP codes, reflecting the premium providers charge for longer-dated risk.
• Prepaid plans reach as high as about 18.3 cents per kWh, showing the cost of skipping the credit check.

Two things jump out from those numbers. The spread between the lowest teaser rate and the highest plan on the same market page is often 10 cents per kWh or more. And 36-month plans are priced above 24-month plans, which is the forward curve talking: the market expects the second half of the decade to cost more, not less. Actual rates vary by ZIP code, TDU, plan, and usage level. Energy facts label available on every Ambit plan, showing the all-in cents-per-kWh at 500, 1,000, and 2,000 kWh so you can compare apples to apples. Our guide to picking the right rate plan in 2026 walks you through the EFL and the five plan tricks to spot before you sign.

Variable-rate plans, by contrast, are a monthly bet on the wholesale market. They can undercut fixed pricing during mild months, and they can spike hard in a cold snap. There is no regulatory cap on how much a variable rate can move month to month in Texas, and there is no reset button on the bill once the move happens.

Four forces pulling on the 2026-2027 Texas forward curve

Natural gas fundamentals and LNG exports

Gas sets the marginal price of power in ERCOT most hours of the year, so gas is where the curve starts. According to Naser Ameen, a principal contributor at the U.S. Energy Information Administration, "We expect prices to rise from $3.52 per million British thermal units (MMBtu) in 2025 to $4.31/MMBtu in 2026 and to $4.38/MMBtu in 2027." Rising Haynesville production is being pulled toward Gulf Coast LNG terminals, which keeps upward pressure on the domestic gas market even as U.S. production hits record highs.

ERCOT reserve margin and data-center load

ERCOT's minimum reserve-margin target is 13.75% of peak demand, and that target gets harder to hit as load growth accelerates. ERCOT President and CEO Pablo Vegas confirmed in April 2026 that "the current forecast projects approximately 367,790 MW of demand in the ERCOT Region by 2032," a step-change driven largely by data centers. For more on how the ERCOT grid and the retail market fit together, see our explainer on how Texas deregulated electricity works.

Not everyone thinks the load will arrive on that timeline. Joshua D. Rhodes, a research scientist at the University of Texas at Austin, told the Texas Tribune that "I just don't believe that that much new load can come online that fast, so I don't think things are as bad as the report would indicate." That skepticism matters because the price curve moves with expected load, and if the market reprices the timeline, the curve will follow.

New solar and battery storage coming online

Supply growth is the counterweight. S&P Global's July 2026 grid outlook identified nearly 28 GW of planned ERCOT additions, including 13.3 GW of solar. More solar tends to compress midday prices, and more storage helps flatten evening peaks. Neither eliminates winter or extreme-weather volatility, but both should moderate the daytime average through 2027.

TDU delivery charges you cannot lock away

Here is the part homeowners often miss. The energy portion of your bill is what a fixed-rate plan locks. The TDU delivery charges from Oncor, CenterPoint, AEP Texas, or TNMP are separate, and they change on their own regulatory schedule. Locking a fixed energy rate protects the biggest, most volatile line on the bill, but it does not freeze every line. Our breakdown of TDU delivery charges shows how the wires side of your bill is set separately from the energy side.

The August 2026 lock-in decision framework

Walk your household through these five filters before you sign anything.

1. Bill certainty first. If you would rather know your rate for the next 12 to 24 months than try to time a market bottom, a fixed rate is the correct choice regardless of where the curve is.
2. Usage size. Larger homes with winter heating loads have more to lose from a February variable-rate spike, and the bigger your usage the more insurance a fixed rate buys you.
3. Contract-term appetite. A 12 or 24-month fixed plan captures winter risk without committing you to a 36-month curve that is already priced higher, so longer is not automatically better.
4. Winter risk tolerance. If a single-month bill three times your normal would be a real problem for your household budget, a variable plan is not the right instrument for you right now.
5. EFL fit. Compare the Electricity Facts Label at the usage level you actually consume, because a low-headline plan is often designed around 1,000 kWh and your true cost at 500 or 2,000 kWh can be very different.

If four of five filters point to lock, lock. If two or fewer point to lock, stay put and revisit in October, before the first cold front.

What happens if you wait?

Waiting is a defensible strategy for households that use less power, have flexible budgets, and can move quickly if the market shifts. The August 2026 STEO trend of slightly lower gas prices means the downside case for waiting is real, not fantasy. But two things narrow that upside. Retailers reprice fixed plans continuously, so a small drop in the wholesale curve rarely translates into a huge drop in the retail rate you actually see. And waiting exposes you to the winter shoulder, which is where most Texas rate regret lives.

There is also a version of waiting that is really procrastination. Month-to-month customers on a holdover product typically pay the highest rate on the page. Nearly $480 a year in overpayments shows up when Texas households let a fixed term roll off without shopping the market. If your current plan already expired, waiting is not neutral. It is expensive.

Frequently asked questions

Should I lock in a fixed-rate electricity plan in August 2026?

Yes, if your priority is bill certainty and you are comfortable with a 12 to 24-month term. The forward curve for winter 2026-2027 is not extreme, but it is up, and locking removes the biggest variable on your bill.

Is a variable-rate plan actually cheaper right now?

Sometimes, for a month or two during mild weather. A variable rate has no cap and no notice period, so a mild fall can flip to a cold-front spike with no cushion for your household.

How much do fixed rates in Texas cost this August?

Fixed rates run roughly 6.0 to 11.8 cents per kWh on 12-month plans, 6.8 to 7.6 cents on 24-month plans, and 13.1 to 14.0 cents on 36-month plans, per Power to Choose listings as of August 2026. Your ZIP code and usage level make a real difference to the number you actually pay.

What does the ERCOT forward price curve say about winter 2026-2027?

The winter curve is priced above the summer curve right now, reflecting expected load growth, LNG-driven gas demand, and the reserve-margin picture ERCOT laid out in its April 2026 long-term forecast.

Will winter 2026-2027 be more expensive than summer 2026?

The forward market is priced that way today, though a mild winter can pull the realized price back. Under EIA's high-demand scenario, 2027 ERCOT wholesale prices could rise about 78.9% versus a $47.39 per MWh baseline.

How much can a variable-rate plan change from month to month in Texas?

There is no regulatory cap on how much a variable rate can move between billing cycles in the deregulated Texas market. During a cold snap, wholesale prices can multiply several times over, and a variable retail plan passes that entire move through to your bill with no cushion.

Should I choose a shorter fixed term now, or lock in a longer one?

For most Texas households, a 12 or 24-month fixed term is the sweet spot. Longer 36-month terms tend to carry a premium because they push you further out the forward curve, which is priced higher for later years.

Ready to compare Ambit plans?

Ambit Energy has served Texas households since 2006 and lists every plan's cents-per-kWh at 500, 1,000, and 2,000 kWh on its Electricity Facts Label. Enter your ZIP code, review the plan detail and the EFL, and choose the term length that matches your risk tolerance and household usage.

Plan details and rates subject to change. Energy facts label available on every plan. Subject to credit approval. Rates and offers referenced here are as of August 2026. Ambit also offers a home-based business opportunity through independent Consultants. Earnings vary by Consultant and are not guaranteed. Statement of Independent Contractor and full income disclosure available at ambitenergy.com.