Best Month to Lock an Electricity Rate in Texas

A Dallas homeowner renews her electricity plan every August, right when her air conditioner is running hardest and Texas power demand peaks. She figures it's convenient, since the old contract is expiring and the house is already hot. What she's probably missing is that August is one of the most expensive times to lock a new rate in Texas.

Texas runs a fully competitive electricity market. Retail Electric Providers (REPs) buy power on wholesale markets and sell it to households under fixed or variable plans. When wholesale prices are high, REPs price new fixed-rate offers to protect their margins. When wholesale prices ease, competition pushes those offers lower. The month you sign a plan is, in effect, a bet on where wholesale costs are heading.

Understanding that dynamic is the first step toward locking a rate that works in your favor rather than the REP's.

Texas electricity demand follows a predictable arc. It climbs sharply from late May through September as cooling loads peak across the state. It dips in October, stays relatively low through winter (outside severe cold snaps), and begins rising again in April and May.

REPs watch the same arc. When the grid is stressed and wholesale power costs are elevated, the fixed rates they advertise reflect that risk. When demand is slack, competition among REPs intensifies and the rates on offer tend to fall.

Two windows have historically produced softer pricing on fixed-rate plans:

Spring (March through April): Demand has not yet climbed into summer peaks. Wholesale forward prices for the summer months are priced in, but the immediate cost of power is relatively low. REPs competing for customers before the summer rush sometimes offer aggressive rates.

Fall (October through November): Summer billing is over, demand has dropped, and REPs are again competing for households whose summer contracts are expiring. This window can be especially favorable because wholesale prices tend to reflect the lower-demand months ahead.

None of this is guaranteed. A late heat wave, a cold front, or grid supply issues can shift wholesale prices quickly. But spring and fall are the two windows most worth watching.

June, July, and August are the months to avoid locking a new rate if your current contract allows you flexibility. Wholesale power costs in Texas spike during peak summer heat, and REPs bake that risk into their fixed-rate offers.

If your contract expires in July and you need to act, you still have options: compare every offer on powertochoose.org carefully, look at plans with longer terms that might average out the seasonal premium, and check the Electricity Facts Label (EFL) for each plan to find the all-in price at your actual usage level. You do not have to accept the first offer your current REP sends.

December and January carry a different kind of risk. Winter storms in Texas have produced price volatility before, and some REPs price their winter offers conservatively as a result. Fixed-rate plans still insulate you from real-time spikes, but the starting rate on a new plan signed in deep winter can reflect that caution.

Both spring and fall can offer favorable entry points, but they suit different situations.

Spring (March to April) works well if you want a 12-month plan that runs through the following spring, avoiding a renewal date that lands in peak summer. A plan signed in March typically expires in February or March of the following year, which again falls in a lower-demand window. That makes the renewal conversation easier.

Fall (October to November) works well if your current plan is expiring after summer and you want to lock before winter. A 12-month plan signed in October runs through October of the following year, which means your next renewal falls in another fall window. That creates a useful pattern.

A 24-month plan signed in either window smooths out more seasonal variation. You will pay one rate across two full summers and two winters, which removes some of the timing pressure but also means you carry that rate even if market conditions improve. Whether the certainty is worth it depends on your risk tolerance and whether the 24-month rate offered is meaningfully lower than the 12-month alternative on the EFL.

Texas requires every REP to publish an Electricity Facts Label (EFL) for each plan. The EFL is a standardized disclosure that shows the all-in price per kilowatt-hour at three usage levels: 500 kWh, 1,000 kWh, and 2,000 kWh per month.

This matters because Texas plans use kWh-tier pricing. A plan advertised at a low rate often includes a bill credit that only activates at a specific usage threshold, typically 1,000 or 2,000 kWh. If you use 750 kWh in a mild month, you might miss the credit and pay a higher effective rate than the advertised number suggested.

When comparing plans, find the EFL column that matches your typical usage. A household in Dallas averaging 1,000 kWh per month should evaluate plans at the 1,000 kWh column, not the 500 kWh or 2,000 kWh columns.

As of July 2026, the lowest all-in advertised rate across about 130 active plans in the Oncor territory (Dallas area) at 1,000 kWh is approximately 7.2 cents per kWh. The median sits near 16.5 cents per kWh. That spread, more than nine cents per kWh, illustrates how much plan selection matters relative to timing alone. You can find current rates for your TDU territory at ElectricRates.org/texas.

Texas has four major transmission and distribution utilities: Oncor (North Texas and Dallas-Fort Worth), CenterPoint Energy (Houston area), AEP Texas (West Texas and the Coastal Bend), and TNMP (parts of West Texas and the Panhandle).

Every REP plan includes pass-through delivery fees charged by the TDU that serves your address. These fees cover the cost of maintaining the poles, wires, and meters that physically deliver electricity, and they apply regardless of which REP you choose. Because TDU fees differ across territories, the same REP plan will produce a different all-in rate depending on where you live.

This is one reason the EFL is essential rather than optional. The delivery charge component is visible in the EFL calculations, so comparing plans within your actual TDU territory gives you an accurate picture. Power to Choose lets you enter your zip code to filter plans by territory.

The right contract length depends partly on when you are signing and partly on your view of future rates.

A 12-month fixed plan signed in a favorable window gives you one year of price certainty and puts your next renewal date back in a similar seasonal window if you time it right. It also limits your exposure if wholesale conditions improve significantly in year two.

A 24-month fixed plan offers two years of price certainty. If you are signing in spring or fall when rates are competitive, locking for two years means you avoid another potential summer pricing window for your next decision. Some REPs offer a modest rate discount for longer terms, though this varies and the EFL will confirm whether the math actually works in your favor.

Before committing to either, check the early termination fee listed on the EFL. If there is a chance you will move or want to switch plans before the term ends, a high termination fee changes the calculation considerably.

When March, April, October, or November arrives and your contract is within 30 to 60 days of expiring, most REPs allow switching without an early termination fee. That is the window to act.

Step one: Go to powertochoose.org, the PUCT-run shopping site, and enter your zip code. Filter by fixed-rate plans and your preferred term length.

Step two: Pull the EFL for any plan that looks competitive. Confirm the all-in rate at your usage level, the contract length, and the early termination fee.

Step three: Cross-reference with ElectricRates.org for additional comparison data and to see current market ranges for your territory.

Step four: Switch before your contract expires. If you let your plan lapse, your REP may roll you onto a month-to-month variable rate, which carries no price protection.

The Public Utility Commission of Texas oversees REPs and maintains consumer protection rules that govern switching, disclosure, and billing. If you have a dispute or notice a plan description that does not match the EFL, the PUCT is the right place to file a complaint.

No calendar date guarantees the lowest electricity rate in Texas. Markets move, weather surprises, and individual REPs price differently. But the evidence for spring and fall as lower-pressure shopping windows is consistent with how Texas wholesale electricity markets behave across a typical year.

The practical strategy: aim to let your contract expire in March, April, October, or November, then shop actively during that window. Read every EFL at your actual usage level. Compare 12-month and 24-month options side by side. Check your TDU territory's rate environment on ElectricRates.org before committing.

The spread between the lowest and median rates in the Oncor territory as of July 2026 shows that plan selection, not just timing, is the bigger lever. But getting both right, good timing and a carefully chosen plan, is how Texas households make the competitive market work in their favor.