This article is for Texas homeowners (the Ambit Brand audience) on the Oncor, CenterPoint, AEP Texas, or TNMP delivery footprint.

The summer heat is here, and with it, the start of high electricity usage and high electricity bills. Texas homeowners may notice a change between May and June billing cycles. There is a reason, and it shows up on the second to last line of the bill: the TDU delivery charge. This charge is not the result of changing plans or providers.

As of June 1, 2026, the Texas regulated delivery utilities (the wires companies, not your retail electricity provider) updated their residential delivery rates. The new schedules were published in the PUCT's TDU Rates summary and took effect at the start of the June billing cycle. The majority of homes in Oncor territory will see an increase. While the rate change itself is small in cents per kWh, summer is also when usage peaks, so the impact lands at the worst possible time of year.

This article walks through what changed, why your retail electricity provider cannot negotiate it away, how much it adds to a typical summer bill, and four practical steps Texas homeowners can still take to cushion the hit.

Changes Effective June 1, 2026

In Texas, every household in the deregulated ERCOT market sees two distinct line items on the same bill. One is the energy charge from a retail electricity provider (REP). The other is the delivery charge from the local TDU (the wires utility that owns the poles and meters in your area). Each TDU is regulated by the Public Utility Commission of Texas (PUCT), and the TDU charge is the same for every customer in that territory regardless of which REP they buy energy from.

Residential delivery rates published in the PUCT's TDU rate table, as of June 1, 2026:

• Oncor (North and Central Texas, including most of Dallas Fort Worth and Waco): as of June 1, 2026, $4.06 monthly base + 6.1196 cents per kWh volumetric, an increase from the March 2026 rate of about 5.6 cents per kWh.
• CenterPoint (Houston metro): as of June 1, 2026, $4.90 monthly base + 5.1461 cents per kWh.
• AEP Texas Central (Corpus Christi, Rio Grande Valley): as of June 1, 2026, $3.24 monthly base + 5.9 cents per kWh.
• AEP Texas North (Abilene, San Angelo): as of June 1, 2026, $3.24 monthly base + 5.7 cents per kWh, a slight decrease from earlier in the year.
• TNMP (parts of Houston and West Texas): as of June 1, 2026, $7.85 monthly base + 6.4665 cents per kWh, essentially unchanged.

The biggest mover here is Oncor. As of June 1, 2026, a jump from the March 2026 rate of about 5.6 cents per kWh up to 6.1196 cents per kWh is roughly a half cent increase on every kWh delivered to your home. That sounds small until you multiply it by a summer month usage profile. (For context on the broader Oncor rate trend earlier in the year, see our 2026 Oncor rate increase analysis.)

Note: Plan details and rates subject to change at PUCT review. Energy facts label available with every plan. The figures above are accurate as of June 1, 2026. Always check your most recent Electricity Facts Label (EFL) for the current charges that apply to your specific plan and address.

Why You Cannot Negotiate the Delivery Charge

This is the part many Texas homeowners only discover when the bill goes up. Your REP has no control over the TDU charge. When you shop for an electricity plan on a marketplace or sign up directly with Ambit, the price you compare is the energy charge plus any fees the REP itself sets. The TDU delivery charge is a regulated pass through. As of June 1, 2026, it is the same on a 7 cent plan and a 14 cent plan, and it does not move when you switch providers.

What this means in practice: if your bill jumped this month because Oncor's volumetric delivery rate went up, switching to any other Oncor area provider on the same plan structure will not undo the increase. The wires charge is the wires charge. The only place a REP can actually save you money is on the energy charge itself, on plan structure (fixed vs. variable, time of use, free nights), and on whether you stay on a competitive rate versus drifting onto a holdover or month to month rate after your contract ends.

How Much Will This Add to Your Summer Bill?

A typical Texas single family home uses somewhere between 1,400 and 2,200 kWh during a hot July or August billing cycle, depending on square footage, insulation, and how aggressively the AC runs. Using the new Oncor volumetric rate, as of June 1, 2026, of 6.1196 cents per kWh:

• 1,500 kWh month: $91.79 in volumetric delivery charges, plus the $4.06 base = $95.85 on the TDU side.
• 2,000 kWh month: $122.39 in volumetric delivery charges, plus the $4.06 base = $126.45 on the TDU side.

At the prior March 2026 rate of about 5.6 cents per kWh, the same 1,500 kWh month would have generated about $84 in volumetric charges. That is a real $8 to $10 increase on the delivery side alone, before the energy charge from your REP enters the picture. Over a four month Texas summer, that compounds to $30 or more in extra delivery costs.

That is why a $0.005 per kWh shift in a regulated rate is not a rounding error for Texas families. It is a quietly material number on the bill.

Four Things Texas Homeowners Can Actually Control

You cannot change the TDU rate. But you can change four things that determine how badly it hits your wallet this summer.

1. Confirm you are not drifting on a month to month rate

If your fixed rate contract expired and you did not renew, you may have been rolled onto a holdover or month to month rate that is often two to four cents higher per kWh than the fixed rates currently available as of June 1, 2026. Log into your account or pull out your most recent bill and check the line that says Electricity Facts Label or Plan Name. If it does not match the plan you originally signed up for, your REP rolled you. This is the single biggest, most overlooked summer bill saver.

2. Match your plan structure to your actual usage pattern

A free nights plan can be a strong fit if most of your usage is genuinely overnight (laundry, EV charging, dishwasher) and you keep daytime AC efficient. It is a poor fit if you work from home and keep the thermostat at 72 all day. Our Free Nights Electricity Plans in Texas pillar guide walks through who actually wins on those plans, and our analysis of whether free nights plans are worth it shows the math for typical Texas usage profiles.

3. Shift what usage you can to off peak hours

ERCOT's grid is most stressed (and wholesale prices spike) between roughly 3 PM and 8 PM in the summer. Even on a flat rate plan, that is when conservation requests get issued and the system is most fragile. Pre cooling the house before 3 PM, running the dishwasher and laundry after 9 PM, and avoiding oven use during peak hours all help. The 2026 summer outlook we covered in our Texas summer electricity bills guide goes deeper on the demand profile.

4. Tighten the easy efficiency wins before September

A clogged AC filter alone can add 10 to 15 percent to your cooling load. So can a thermostat set to 70 instead of 76. Closing blinds on west facing windows in the afternoon is free and meaningful. None of this is glamorous, and none of it offsets the delivery rate change one for one, but stacked together they routinely save 100 to 200 kWh per month on a typical Texas home.

Will Anything Get Better in Late 2026?

There are two storylines worth watching.

First, the PUCT continues to review distribution cost recovery factors (DCRF) and transmission cost recovery factors (TCRF) on a rolling basis, and not every adjustment is upward. AEP Texas North's June 1, 2026, rate actually decreased modestly. The TDU rate table is updated at PUCT, and rates can shift again in the fall and at year end.

Second, on June 18, 2026, the PUCT approved the first phase (Batch Zero) of ERCOT's large load interconnection framework. The headline impact is on grid reliability for data centers and other large industrial loads, but a more stable grid with better planned generation should put downward pressure on extreme summer events, which is the underlying driver of many recent rate adjustments.

Bottom Line for Texas Homeowners

The TDU delivery rate change that took effect June 1, 2026, is real. It is meaningful for households in Oncor territory in particular, and it is genuinely outside your REP's control. What Texas homeowners can control is whether they are on a current competitive rate plan, whether the plan structure matches their usage, and whether their home is running efficiently during peak hours.

If you would like a no pressure look at your current bill against the plans we offer in your TDU territory, we are happy to help. Request a quote with your ZIP code and your most recent bill, and we will walk through whether a rate or plan structure change would actually save you money under the new delivery schedule.

Frequently Asked Questions

Why did my Texas electric bill go up in June 2026 even though I did not change plans?

Most likely because your TDU's residential delivery rate changed on June 1, 2026. As of June 1, 2026, in Oncor territory, the volumetric delivery charge rose from the March 2026 rate of about 5.6 cents per kWh up to 6.1196 cents per kWh. That added charge appears on every kWh delivered to your home, regardless of which retail electricity provider you use.

Can I avoid the new TDU delivery charge by switching providers?

No. The TDU delivery charge is regulated by the PUCT and is identical for every customer in that TDU territory. Switching from one Oncor area REP to another does not change the delivery line on your bill. What can change is the energy charge from your REP and the structure of your plan.

Which Texas TDU had the biggest 2026 delivery rate increase?

Oncor's residential volumetric delivery rate is the biggest mover among the major TDUs. As of June 1, 2026, the volumetric charge rose from the March 2026 rate of about 5.6 cents per kWh to 6.1196 cents per kWh. CenterPoint, AEP Texas Central, and TNMP are roughly flat or modestly changed; AEP Texas North's rate moved slightly down.

Where can I see the official Texas TDU delivery rates?

The PUCT publishes the current residential delivery rates for all five Texas TDUs at puc.texas.gov in the TDU Rates summary. Your most recent Electricity Facts Label (EFL) also shows the delivery charges that apply to your specific plan and service address.

Disclosures. Plan details and rates subject to change. Energy facts label available with every Ambit Energy plan. This article addresses retail customer electricity plans and does not promote the Ambit Energy consultant business opportunity; for any reader interested in that side, earnings vary and income disclosure information is available from your Ambit Independent Consultant.