A Texas electricity plan can have a very different effective price at different usage levels when tiers and bill credits are involved. This calculator models two marginal usage tiers, one fixed monthly amount and one threshold credit from the information you enter. It helps you inspect the mechanics of an offer against a usage scenario without treating an advertised example price as your own bill.
Texas electricity plan usage scenario
Model one usage tier and bill-credit threshold from an Electricity Facts Label.
Models a single threshold credit and two marginal usage tiers before taxes. Enter delivery charges in the rates or fixed charges. Plans with other eligibility rules need a separate calculation.
What the result shows
The first marginal rate applies up to the entered tier limit and the second applies above it. The fixed monthly amount is added and the credit is deducted when the usage threshold is met. The result is shown before tax with an effective cents-per-kWh figure. Plans with different tier rules, several credits or additional eligibility conditions need a separate model.
Prepare the information for this review
The labels in the tool describe the measurement or record needed for each input. The following checks help keep the entered information consistent with the case you intend to review.
- Monthly consumption (kWh): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- First-tier limit (kWh): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- First-tier rate (cents/kWh): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- Rate above the tier (cents/kWh): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- Monthly fixed charges ($): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- Bill-credit threshold (kWh): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
- Credit when the threshold is met ($): Enter a plain number in the unit shown, without a currency symbol or thousands separators. Keep the same measurement basis throughout the comparison and retain the source figure for checking.
Check the result against the source records
Models a single threshold credit and two marginal usage tiers before taxes. Enter delivery charges in the rates or fixed charges. Plans with other eligibility rules need a separate calculation.
Start with one case whose inputs you can trace back to the original records. Run the tool and compare its labels, units and dates with that example before preparing a wider review. If a value is uncertain, record the uncertainty in your working notes and resolve it with the person who holds the source information. A neatly presented result is useful only when the assumptions behind it are also clear.
Keep a copy and agree the next action
Use Download report to keep the written result and Download results CSV when you want to work with its records in a spreadsheet. Save inputs keeps a JSON file that can be restored into this same tool later. Editing an input hides the old result until you run the tool again, which helps avoid sharing an output that belongs to an earlier set of assumptions.
Where report emailing has been configured, Email my results lets you request a copy and send the same inputs and result to this site for follow-up about your request. The form explains who receives the copy and requires a completed security check. Check the recipient address carefully before sending. The email request uses the current result, so review the entered information before choosing that option.
For help with the next step, Explore specialist support.