A Texas electricity bill looks busy, but almost every line falls into one of two buckets: what you paid your retail provider for energy, and what you paid the utility to deliver it. When you separate those two, the bill stops being intimidating and starts telling you exactly where your money goes and which part shopping for a new plan can move.
The two halves of every Texas bill
In the deregulated Texas market your Retail Electric Provider (REP) is who you sign up with and who sets the price of the electricity itself. Your Transmission and Distribution Utility (TDU) — CenterPoint in Houston, Oncor in Dallas, AEP in Corpus Christi and Victoria, and others by region — owns the poles, wires, and meter. The TDU delivers power and restores outages no matter which provider you choose, and it bills a regulated delivery fee that every provider passes through to you at the same rate.
The energy charge (this is what you shop for)
The energy charge is your usage in kilowatt-hours (kWh) multiplied by your plan's energy rate. If you used 1,250 kWh on a plan that charges roughly 12 cents per kWh for energy, that line is about $150. This is the piece a different plan can actually lower, because it is the only part the retail provider controls.
TDU delivery charges (the same for every provider)
The delivery side usually shows up as a fixed monthly TDU charge plus a per-kWh delivery charge, and it can be a meaningful share of the total. These rates are set by the utility and approved by the Public Utility Commission of Texas, so they are identical whether you buy your energy from Ambit or anyone else. Switching providers does not lower your delivery charges, which is exactly why a plan should be judged on its energy rate and its all-in average price, not on a delivery line nobody competes on.
Watch the base and minimum-usage fees
Many plans add a fixed base charge (sometimes called a customer charge) that you pay every month no matter how little you use. Some go further with a minimum-usage fee that hits you if you fall below a threshold, often around 800 to 1,000 kWh. For a small apartment or a light-use winter month, these fixed charges can quietly make a "cheap" plan one of the most expensive ones for you.
A line-by-line example
Here is what a typical month looks like for a home that used 1,250 kWh. Your own numbers will differ by plan, usage, and TDU region, but the structure is the same everywhere in Texas.
| Line item | What it is | Amount |
|---|---|---|
| Energy charge | 1,250 kWh × your energy rate | $150.00 |
| Base / customer charge | Fixed monthly fee from your provider | $9.95 |
| TDU fixed charge | Regulated delivery, set by the utility | $4.39 |
| TDU delivery (per kWh) | 1,250 kWh × the regulated delivery rate | $52.00 |
| Taxes & fees | Sales tax and any local fees | $18.50 |
| Estimated total | $234.84 | |
The dollar figures above are an illustration to show how the lines stack up, not a quote. The takeaway is the proportion: a big share of the bill is delivery and fixed charges you cannot shop away, so the smart move is to compare the part you can.
Bill credits, and rates that only look low at one tier
Some plans advertise a low headline rate that only applies because of a bill credit — a flat dollar amount knocked off your bill, but only if your usage lands inside a specific window, such as a $30 or $40 credit between 1,000 and 1,500 kWh. Use a little less or a little more and the credit vanishes, so your real rate jumps. That is how a plan can look cheap at exactly 1,000 kWh and turn out pricey for a household that uses 700 in spring and 2,200 in August. Always ask at what usage level the advertised rate actually applies.
How the EFL ties it all together
Every Texas plan comes with an Electricity Facts Label (EFL), a one-page disclosure required by the Public Utility Commission of Texas. The EFL lists the energy charge, the base charge, any minimum-usage fee, any bill credits, the contract term, and the early-termination fee. Most usefully, it shows an average price per kWh at 500, 1,000, and 2,000 kWh — three points that already fold in the base charge, credits, and TDU delivery. Comparing two plans at the tier closest to your real usage is the single most honest way to compare them, because that average price is the all-in number, not just the headline energy rate.
What to check on your bill every month
- Your kWh usage — compare it to the same month last year so a spike is obvious early.
- Your average price per kWh — divide the total by the kWh used. This is your real, all-in rate.
- Base and minimum-usage fees — confirm a low month did not trigger a penalty.
- Bill credits — verify any credit you were promised actually posted and your usage qualified.
- Your contract end date — when a fixed term ends, many providers roll you to a higher month-to-month rate, so that is the moment to shop again.
Frequently asked questions
What is the difference between the energy charge and TDU charges?
The energy charge is the electricity you bought, priced by your retail provider — that is the part shopping can lower. TDU charges are the regulated delivery fees from the utility that owns the wires; they are the same for every provider and switching does not change them.
Can I reduce my TDU delivery charges by switching providers?
No. Delivery charges are set by your utility and approved by the Public Utility Commission of Texas, so they are identical no matter who you buy energy from. The way to lower your bill is a better energy rate and using less.
How do I find my real price per kWh?
Divide your total bill by the kilowatt-hours you used that month. That all-in average includes the energy charge, base fees, any credits, and delivery, so it is far more honest than the advertised headline rate.
Why does a plan with a low rate sometimes cost more?
Usually a bill credit or minimum-usage fee. The low rate may only apply inside a narrow usage window; outside it the credit disappears or a penalty applies, and your effective price rises. Check the Electricity Facts Label at the usage tier closest to your home.