Fixed vs Variable Rate Commercial Electricity Plans in Texas
Fixed-rate electricity plans Texas commercial customers sign in 2026 priced at 6.5-8.5 cents/kWh on the energy line. Variable plans tracked ERCOT day-ahead at 3-5 cents with monthly volatility. The math, the tail events, and the five-lever framework for choosing.
Fixed-rate electricity plans Texas commercial customers sign in 2026 priced at roughly 6.5 to 8.5 cents per kWh on the energy line for 12- to 36-month terms. Variable-rate plans tracked the wholesale ERCOT day-ahead hub at 3 to 5 cents per kWh on average, with monthly volatility from 2 cents below the fixed line to 30 cents above during scarcity events. The right choice depends on how much price risk a Texas commercial buyer can absorb, and what the EIA's 45% ERCOT price increase forecast for late 2026 means to that buyer's budget.
This article compares fixed-rate electricity plans Texas businesses can sign against variable-rate alternatives, walks through the math behind each, and lays out which historical events should drive the choice. For the broader rate stack, see the pillar guide on commercial electricity rates in Texas. For the plan structure landscape, see the business electricity plans spoke.
Fixed-Rate Electricity Plans Texas Buyers Lock For: How They Work
Fixed-rate electricity plans Texas Retail Electric Providers (REPs) offer to commercial customers carry a single locked cents-per-kWh energy price for the contract term, typically 12, 24, 36, 48, or 60 months. Each PUCT-certified REP prices fixed-rate electricity plans Texas businesses can buy off the same forward-curve methodology described below. The locked rate covers the energy line only; Transmission and Distribution Utility (TDU) delivery, ancillary services, capacity charges (on demand-metered accounts), and regulatory fees pass through at whatever the regulated tariff sets at the time of consumption.
Term-rate tradeoffs from May 2026 reference quotes on a small commercial 5,000-25,000 kWh per month profile:
| Term | Energy rate (cents/kWh) | Approximate energy delta vs 12-month |
|---|---|---|
| 6-12 months | 6.97 - 7.50 | baseline |
| 15 months | 6.66 - 6.97 | -0.20 |
| 24 months | 7.00 - 7.20 | -0.05 |
| 36 months | 7.10 - 7.30 | +0.05 |
| 48-60 months | 7.30 - 7.50 | +0.30 |
Lower rates typically appear on odd terms (15, 18 months) because REPs match those terms to their own forward-hedge maturities on the ICE-traded ERCOT North Hub day-ahead curve.
How Texas REPs Build a Fixed Rate
A fixed energy rate is the sum of seven components, each of which a buyer can challenge if it looks bloated. Every fixed-rate quote produced under PUCT Substantive Rule 25.475 reduces to the same arithmetic.
| Component | Typical 2026 (cents/kWh) | What it covers |
|---|---|---|
| Wholesale baseload hedge | 4.0 - 5.0 | ICE-traded ERCOT North Hub day-ahead forwards, 90-95% of load |
| Ancillary services | 0.5 - 0.8 | Reg-up, reg-down, responsive reserve, ECRS |
| Congestion risk premium | 0.3 - 0.6 | Zonal congestion (HB_HOUSTON vs HB_NORTH); CRR hedge shortfall |
| Capital cost of credit | 0.4 - 0.7 | REP financing of forward purchase, 8-12% cost of capital |
| Broker commission | 0.1 - 0.2 | If sold through a broker channel |
| REP margin | 0.5 - 1.0 | 10-20% gross margin target |
| Total energy charge | 6.8 - 8.9 cents | (Pre-TDU, pre-tax) |
Sample 7-cent fixed-rate breakdown for a 12-month plan in May 2026:
4.2 (hedge) + 0.6 (ancillary) + 0.4 (congestion) + 0.5 (capital) + 0.15 (broker) + 1.1 (REP margin) = 7.0 cents per kWh
Verifiable arithmetic. A buyer who sees a 9-cent quote on the same 12-month profile in CenterPoint should ask which component is bloated; usually it is REP margin (commercial REPs commonly hold the line at 1.0 to 1.2 cents on small accounts) or congestion premium (a HB_HOUSTON load should not pay HB_NORTH zonal premiums).
How Variable-Rate Plans Work
A variable-rate commercial plan resets the energy charge each month, typically tracking the prior-month ERCOT day-ahead settlement at the relevant load zone with a markup. The buyer pays whatever wholesale settled, plus a small REP margin (usually 0.5 to 1.5 cents per kWh).
Variable plans take three forms in commercial Texas:
- Pure spot pass-through. Wholesale plus margin, no smoothing. Maximum risk, maximum upside in low wholesale environments.
- Indexed plans tied to natural gas heat rate. Energy = (gas $/MMBtu) x heat rate. A 7.5 heat rate at $3.50 gas equals 2.6 cents per kWh of energy. Used for industrial customers with gas-tied operations. Exposure: a $2 spike in gas adds 1.5 cents per kWh.
- Block-and-index hybrid. Fixed block on baseload (e.g., 80% of expected usage at 5.5 cents) with the remaining 20% settled to ERCOT day-ahead hub. Splits the risk.
Pure variable rates in May 2026 averaged 4.0 to 5.5 cents per kWh on the energy line, but the standard deviation across months ran above 1.5 cents in normal years and above 4 cents in scarcity years.
When Each Makes Sense: Five Decision Levers
The fixed-vs-variable decision is not academic. Five factors determine which structure wins for a specific Texas commercial buyer.
1. Budget Tolerance for Monthly Variability
A business with tight margins on a 100,000 kWh per year load cannot absorb a $5,000 winter storm month. Fixed-rate electricity plans Texas customers buy explicitly to insure against that scenario. A business with a 10x cushion on energy spend can take the variable side and capture the structural discount.
2. The Forward Curve Versus Spot
In May 2026, the ICE-traded ERCOT North Hub Calendar 2027 strip was trading around 4.5 cents per kWh, while the day-ahead spot averaged 3.2 cents. The forward curve contains a risk premium that variable buyers do not pay. In a flat or declining wholesale environment, variable typically wins; in a rising one (the EIA's 45% increase forecast for ERCOT 2026 implies rising), fixed wins.
3. Historical Tail Events
Two events in the past five years define the risk profile. Both occurred during weather extremes that variable plans had no protection against.
- Winter Storm Uri, February 2021. ERCOT prices hit the $9,000 per MWh emergency cap for four straight days. Variable customers with no hedging saw single-month bills 50 to 200 times normal. One Houston small business with a 10,000 kWh per month average reportedly received a $9,000 bill for a single week. The full event review is on file with the Texas Legislature SB 3 (2021) post-mortem.
- 2023 ERCOT scarcity events, June through September. Multiple peak hours cleared above $4,500 per MWh as reserve margins fell below 5% during heat waves. Variable plans absorbed the spikes; fixed plans absorbed nothing. ERCOT's Operating Reserve Demand Curve (ORDC) documentation covers the price-formation mechanics during scarcity.
4. Operational Flexibility
Variable plans pay back in proportion to load flexibility. A facility that can shift load away from the highest-priced day-ahead hours, or that can curtail under demand-response, captures more of the variable discount. A 9-to-5 office cannot. The business that buys variable in 2026 should have a load-management plan; without one, the math is worse than fixed.
5. Term Length Versus Forecast Horizon
The 24-month fixed plan in May 2026 priced 0.05 cents below the 12-month plan, despite locking 24 months of price risk. This is the contango of the ERCOT forward curve: longer terms cost less because the curve flattens over time and the REP can hedge at a lower average. The customer's natural decision: take the longer term unless the planning horizon is shorter.
Fixed-Rate Electricity Plans Texas Customers Get Wrong: Three Common Errors on Fixed-Rate Electricity Plans Texas Owners Sign
The fixed-rate decision goes badly in three predictable ways.
Error 1: Locking at the Top of the Curve
A 36-month fixed signed in late 2024 at 9.5 cents per kWh would have looked smart for the Uri-era memory but caught the 2024 wholesale collapse (ERCOT real-time average dropped from $48 per MWh in 2023 to $26 per MWh in 2024). The signed-in customer paid 50% above market for two years.
The fix: sign shorter terms when the forward curve has steep contango (longer terms much cheaper than shorter), and longer terms when the curve is flat. In May 2026, the curve is mildly contango (24 months at 7.00 cents vs 12 months at 7.05 cents), suggesting moderate term lengths.
Error 2: Ignoring the All-In Rate
Fixed-rate quotes only the energy line. The all-in bill includes TDU delivery (1.5-3.5 cents per kWh), ancillary (0.5-1.5 cents), demand charges on metered accounts (around $40 per kW per month), and regulatory fees (0.02-0.04 cents). A "low" 6-cent fixed energy rate becomes an 11-cent all-in number after the stack. Buyers who shop the energy line on fixed-rate electricity plans Texas REPs sell, and then get surprised by demand charges, write the most common complaint to the PUCT.
Error 3: Skipping the Bandwidth Negotiation
Fixed-rate contracts include a usage bandwidth (typically 90-110%). Outside the band, energy settles to spot, not contract. A restaurant fluctuating from 8,000 to 12,000 kWh per month on a 10,000 kWh contract is at the band edge. Negotiate to 80-120% to widen the safe range.
Variable-Rate Electricity Plans: The Cases Where They Win
Variable can be the better answer for three specific commercial profiles where fixed-rate electricity plans Texas customers sign do not pay back.
- Demand-response participants. A 200 kW commercial customer earning $2,500 to $5,000 per year on demand-response programs offsets much of the variable rate's downside. The combined position can run 1.5 to 2.5 cents per kWh net below a fixed contract.
- Customers with on-site generation or storage. A facility with rooftop solar covering 30-50% of load and a 100-200 kWh battery shifts consumption away from peak ERCOT prices. The variable plan rewards the load shifting; a fixed plan does not.
- Short-horizon occupants. A business with a 6- to 12-month lease cannot economically lock a 24-month contract. Variable plus an early-out option, or month-to-month from the existing REP, is the better answer.
Frequently Asked Questions About Fixed-Rate Electricity Plans Texas Owners Sign
Are fixed-rate electricity plans Texas customers sign always cheaper than variable? Not over a full cycle. Fixed plans price in a forward risk premium of 0.5 to 1.5 cents per kWh above the prior-year wholesale average. In flat or declining markets, variable wins; in rising markets, fixed wins. The 2024-25 data showed wholesale dropping 46% from 2023, then rising again into 2026. Pick fixed when the buyer cannot tolerate the high-side risk.
What is the cheapest fixed-rate term in May 2026? The 15-month term currently quotes lowest, around 6.66 cents per kWh on the energy line in CenterPoint and Oncor territory. The catch: 15 months from May 2026 is August 2027, historically a poor renewal window because gas peaks with summer demand. Many buyers take a 24-month contract at 7.00 cents instead.
How does a Texas commercial customer switch from variable to fixed? Variable customers can switch any time without an early termination fee (variable plans typically have no ETF). Pull EFLs from three to five REPs, compare on an identical usage profile, and enroll. The switch occurs at the next meter read, typically 7 to 21 days. There is no service interruption.
What happens to variable rates during ERCOT scarcity events? Pure variable plans absorb the full scarcity-pricing pass-through. ERCOT's Operating Reserve Demand Curve (ORDC) widens during reserve shortages, and prices can clear above $5,000 per MWh ($5 per kWh) for hours. Fixed plans absorb nothing; the REP holds the price risk.
Can I split my load between fixed and variable? Yes, on demand-metered accounts above roughly 200 kW peak. Block-and-index plans put a fixed block on baseload (typically 70-80% of expected usage) and settle the remainder to spot. The structure smooths volatility while capturing partial wholesale upside in low-price months.
What to Do Next
Pull the most recent business electricity bill, identify the contract end date, and compare the current rate against the May 2026 fixed-rate ranges above. If the contract ends within 90 days, decide fixed-vs-variable using the five-lever framework. If the contract has more than 90 days left, calendar a 60-day-pre-end shopping window. The pillar guide on commercial electricity rates in Texas covers the rate stack in full, the retail electric provider Texas comparison pillar lists the active commercial REPs, and ERCOT day-ahead settlement data is the underlying wholesale benchmark fixed-rate REPs hedge against. The EIA Form 826 commercial rate average gives the 39%-below-US benchmark for sanity checking any quote.