Texas electricity · Evidence guide
How do fixed-rate and bill-credit electricity plans compare?
Fixed-rate and bill-credit are not true opposites: a fixed-rate product can still contain a conditional credit, so compare full mechanics at actual usage.
Last reviewed 2026-08-21 · Readiness: READY
30-second answer
The answer depends on the full formula.
Fixed rate describes how a product's price may change during its term. Bill credit describes a conditional pricing mechanic. A plan can be both fixed-rate and bill-credit, so the labels alone cannot identify the cheaper or safer option.
Compare the full recurring-cost curve: underlying energy price, fixed charges, TDU delivery, credit windows, usage volatility, term, and ETF. A simpler fixed structure can be easier to predict; a credit structure can win if the household reliably qualifies. Neither wins by category alone.
Key facts
What is known—and on what basis
Different dimensions
Fixed rate concerns allowed price changes during the term; bill credit concerns a conditional charge or discount inside the formula.
Predictability
A plan without cliffs is generally less sensitive to small usage changes, even when both products are fixed-rate.
Decision rule
Apply the same supported monthly usage to both products and include contract timing and fees.
Why
Why the general answer can reverse
Marketing categories compress several mechanics into one label. A fixed-rate product may still have TDU pass-through changes, a base charge, a minimum-use fee, or a bill credit. A credit plan may have a fixed underlying price for the term.
A household with stable usage inside the credit window can receive the intended discount. A household that crosses the threshold frequently can experience abrupt effective-rate changes and may value a smoother cost curve even if one reference column looks higher.
Contract length and ETF can reverse the result. A lower modeled annual cost does not automatically justify leaving an existing contract today.
Evidence
What to check in the actual situation
- Whether each product is legally disclosed as fixed, variable, or another type.
- Every recurring charge and the exact bill-credit eligibility rule.
- Month-by-month household usage and how often it falls near a threshold.
- Contract length, expiration, ETF, and the freshness and availability of the compared offer.
Decision framework
When each Eyebiss label could apply
| Label | Condition |
|---|---|
| KEEP | Supported current-plan economics remain competitive for the household after all represented charges and constraints are included. |
| WAIT | A known timing boundary, such as contract expiration, makes later reconsideration better supported than action now. |
| SWITCH | Complete, current evidence shows a better household outcome after fees, remaining term, and comparable plan mechanics are included. |
| NEEDS_INFORMATION | The bill, EFL, contract, usage history, location, or current alternative evidence is missing, stale, or conflicting. |
Worked example
A smoother plan can win outside the credit window
Compare two simplified hypothetical products before delivery and taxes: Plan A costs $20 + $0.14 per kWh. Plan B costs $0.17 per kWh with a $100 credit beginning at 1,000 kWh.
- At 800 kWh, Plan A is $132 and Plan B is $136, so the simpler formula is lower.
- At 1,000 kWh, Plan A is $160 and Plan B is $70 after the credit, so the credit plan is lower.
- A real comparison must repeat this calculation for every supported month and include all disclosed charges.
Edge cases
Where the answer needs more care
- A fixed-rate product may change for allowed TDU or regulatory charge changes.
- A credit may have both minimum and maximum usage conditions.
- A household with new solar, an EV, or a move may not have representative historical usage.
Sources
Evidence used on this page
- PUCT Substantive Rule 25.475: General Retail Electric Provider Requirements and Information DisclosuresPublic Utility Commission of Texas
The contract documents include the TOS, EFL, and YRAC. The rule defines fixed-rate and variable-price products. The EFL uses standardized price disclosures, including specified usage levels. Contract-expiration notices must describe termination penalties and applicable timing.
Retrieved 2026-08-21 · Texas · primary source · freshness highConsumers should verify the current rule and their own TOS, EFL, YRAC, and expiration notice before acting. - Power to Choose Plan OptionsPublic Utility Commission of Texas
Fixed, variable, indexed, prepaid, and time-of-use products have different pricing and contract behavior. Time-of-use prices may vary by time or day.
Retrieved 2026-08-21 · Texas · primary source · freshness mediumIndividual EFLs and TOS documents control the actual product mechanics. - How Eyebiss reasons from electricity evidenceEyebiss
Eyebiss preserves official facts, observations, calculations, analysis, inference, and unknowns as distinct provenance classes. Eyebiss may abstain when evidence is missing, stale, or conflicting.
Retrieved 2026-08-21 · Texas · primary source · freshness highThis methodology describes the public knowledge architecture and does not claim live statewide market coverage.
Check your actual situation
Compare the formulas at your usage
Use the public check to apply supported formulas to the same household usage. Availability and exact plan evidence still gate any household action.