Why Your Texas Delivery Charges Changed on September 1

September can bring a familiar surprise to Texas electricity customers: the bill arrives, the thermostat settings have not changed much, the plan has not changed, and yet the total is different. If your September electricity bill looks different from August and nothing about your household changed, you are not imagining it. The explanation is usually sitting in a line item that most people skim past on the way to the amount due. It is the delivery portion of your bill, and it reset on September 1.

Texas splits your electricity service between two companies that most customers never think of separately. Your retail electric provider, or REP, is the one you chose, and it sells you the energy itself. Your transmission and distribution utility, or TDU, owns the poles, wires, transformers, and meter that physically carry that energy to your address. You shop the first one. You are assigned the second one based on where you live.

Those two pieces move on completely different schedules, which is the part that catches people off guard. TDU delivery charges in Texas are regulated and approved by the Public Utility Commission of Texas, and they refresh on a set calendar rather than whenever your contract renews. September 1 is one of those dates. March 1 is the other, and the commission can approve adjustments at other points as well.

The reset also does not push every territory in the same direction. Compared to where the rates stood a year ago, three of the five residential delivery rates in the deregulated market are higher and two are lower, which means a customer in Houston and a customer in Abilene are looking at genuinely different Septembers. So if you are asking why your electric bill went up in September, the honest answer is that it might have nothing to do with the plan you picked. What follows breaks the bill into its two layers, shows where each utility currently stands, and explains how to tell the regulated part from the part you actually control when you go shopping for a better rate.

What TDU Delivery Charges Actually Cover

The delivery charge pays for the physical infrastructure between the power plant and your meter. That includes the transmission lines that move electricity across long distances, the distribution equipment that steps it down for neighborhood use, the meter on the side of your house, and the crews who repair all of it after a storm. Your REP does not own any of that. It buys electricity on your behalf and bills you for it, but the wires belong to the utility that serves your territory.

Five investor-owned utilities handle delivery across the deregulated portion of the Texas grid: Oncor across Dallas-Fort Worth and much of North Texas, CenterPoint Energy in the Houston area, AEP Texas Central and AEP Texas North covering separate stretches of South and West Texas, and Texas-New Mexico Power across a scattered patchwork of smaller service areas. Your service address determines which one delivers your power. This is not a preference you set or a box you check during enrollment, and no retail provider can move you to a different utility.

The charge itself has two parts, which is why it behaves differently at different usage levels. There is a fixed monthly component, split on your bill between a customer charge and a metering charge, that you pay regardless of how much electricity you use. Then there is a volumetric charge applied to every kilowatt-hour that passes through your meter. A household that barely uses anything still pays the fixed side, while a household running the air conditioning through a Texas August pays a delivery bill dominated by the volumetric side.

The most important thing to understand about all of it is that these rates are identical for every customer in a given territory. Two neighbors on the same street, signed with two different retail providers on two completely different plans, pay the exact same delivery rate. Providers pass the charge through as approved and cannot mark it up, discount it, or waive it as a promotion. That is what makes the delivery layer fundamentally different from the energy layer: one is regulated and assigned to you, the other is competitive and chosen by you.

Why the Rate Resets in September

Delivery rates do not change when your contract renews or when you switch providers. They change on a regulatory calendar, and the two scheduled dates are March 1 and September 1. On those dates the Public Utility Commission of Texas approves each utility's updated tariff, which folds in the adjustment mechanisms utilities use to recover things like transmission costs and state-mandated energy efficiency programs. The commission can also approve changes at other points in the year when a utility files for one, so the March and September dates are the regular rhythm rather than the only possibility.

Here is where residential delivery stood across the five deregulated territories as of the September 1, 2026 reset, according to the Public Utility Commission of Texas rate summary:

• CenterPoint Energy: 6.4130¢ per kWh, plus $4.90 in fixed monthly charges
• Oncor: 6.0295¢ per kWh, plus $4.06 in fixed monthly charges
• AEP Texas Central: 5.8¢ per kWh, plus $3.24 in fixed monthly charges
• AEP Texas North: 5.7¢ per kWh, plus $3.24 in fixed monthly charges
• Texas-New Mexico Power: 7.4022¢ per kWh, plus $7.85 in fixed monthly charges

Compare those against where the same rates sat a year earlier and the pattern stops looking like a uniform increase. CenterPoint moved up from 5.7889¢, Oncor from 5.6032¢, and TNMP from 7.2055¢. AEP Texas Central went the other direction, down from 6.0¢, and AEP Texas North came down from 5.9¢ as well. Three territories are paying more to have electricity delivered than they were a year ago, and two are paying less.

That split is the practical takeaway. A Houston household and a household in AEP North territory can be on the identical plan from the identical provider and have opposite experiences this month, purely because of infrastructure costs neither of them chose. The fixed side matters too, and TNMP is the clearest example: its $6.72 metering charge alone is larger than the entire fixed monthly cost in any other territory, which is why TNMP customers feel the delivery layer even in months when they barely use the air conditioning.

Why Your Bill Changed but Your Plan Did Not

The single most common misreading of a September bill is treating a higher total as evidence that the plan went bad. A fixed-rate contract locks the energy charge, meaning the cents per kilowatt-hour your provider bills you for the electricity itself. It does not lock the regulated delivery charge underneath it, because that number was never your provider's to set in the first place. This is the practical difference between the energy charge and the delivery charge on a Texas bill, and it is why a signed twelve-month contract can still produce a different total in September than it did in August.

Usage is the other half of the explanation, and in Texas it is usually the bigger half. September is a transitional month where the first half often still runs like summer and the second half starts to ease, so consumption can swing hard from one bill to the next. A few hundred extra kilowatt-hours will move your total far more than a fraction of a cent in delivery rates. Before concluding anything about your rate, check what you actually used against the same figure on last month's bill.

Billing periods are worth a second look too, since they rarely line up neatly with the calendar. A bill labeled September may cover a meter read that started in mid-August, which means part of it was billed under the old delivery rate and part under the new one. That also makes the first bill after a reset a poor basis for comparison, because it is a blend of two rate periods rather than a clean picture of either.

When you want to diagnose a change rather than guess at it, pull up both bills side by side and look at these specific lines:

• Total kilowatt-hours used in each period
• The meter read dates each bill actually covers
• Your contracted energy rate, which should be unchanged on a fixed plan
• The fixed monthly delivery charges
• The volumetric delivery charge applied to your usage
• Taxes and any recurring plan fees

Most of the time the answer is visible in that comparison. Either you used meaningfully more electricity, or the delivery layer moved, or the billing window covered a different stretch of days. What almost never explains it is the energy rate on a fixed plan, because that is the one number in the whole arrangement that is contractually held still.

How to Read Both Layers When You Compare Offers

Once you know the delivery layer is fixed by your address, plan shopping gets simpler rather than harder. You stop trying to optimize something you cannot change and focus on the energy charge, which is the only part any provider is actually competing for. September is also when a lot of Texas households start shopping in earnest, since summer contracts come due and fall is a common window to lock in a rate for the months ahead. The delivery charge will be identical on every offer you look at, so it cannot make one plan beat another. What it does affect is your total bill, which is why comparing a new offer against an old bill without accounting for the September reset will make the offer look worse than it is.

The advertised rate is where most comparisons go wrong. Providers quote an average price per kilowatt-hour calculated at a specific usage level, and that average bundles the energy charge, the delivery charges, and any fixed monthly fees into a single number. Change the usage assumption and the number changes, sometimes dramatically. The delivery data makes this concrete: at 500 kWh the average residential delivery bill in Oncor territory runs $34.21, at 1,000 kWh it is $64.36, and at 2,000 kWh it reaches $124.65. Fixed charges weigh heavily on a low-usage household and barely register on a high-usage one, and the same distortion applies to every fixed fee in a retail plan.

The Electricity Facts Label is the document that cuts through this, and every plan is required to have one. It shows the energy charge separately, lists the delivery charges being passed through, discloses the contract term and any early termination fee, and prices the plan at multiple usage levels rather than just one flattering number. When two offers look close on the advertised rate, the label is usually where they stop looking close.

A useful comparison runs in this order:

• Confirm which utility serves your address, since that sets the delivery layer for every offer
• Estimate your actual monthly usage using a full year of bills, not a summer month or a mild one
• Read the Electricity Facts Label at the usage level closest to your real consumption
• Check whether the energy rate is fixed, variable, or indexed, and how long the term runs
• Look for minimum usage fees, bill credits with usage thresholds, and early termination fees
• Compare total estimated monthly cost rather than the headline cents per kilowatt-hour

The delivery reset that landed on September 1 is not something you can shop your way out of, and neither is the one coming in March. What you can do is make sure the half of the bill that is genuinely competitive is not quietly costing you more than it should, and the fastest way to find out is to enter your ZIP code and see what the current offers in your territory actually price out to at your real usage.