Utilities · Utilities
Energy Provider Compare
Compare two energy plans with monthly kWh, per-kWh rates, fixed fees, and annual savings estimate.
Last reviewed: February 18, 2026
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What this calculator does
Compare two energy plans with monthly kWh, per-kWh rates, fixed fees, and annual savings estimate.
How it's calculated
- Inputs are validated before running the calculator-specific compute() function.
- Core math is deterministic and implemented in src/lib/calculators/energy-provider-compare.ts.
- Results are recalculated instantly as values change and are shareable via query parameters.
- Disclosure assumptions and limitations are shown on-page for decision context.
Example
Example scenario: Monthly kWh = 900 kWh; Plan A rate = 0.21 USD/kWh; Plan A fixed fee = 12 USD; Plan B rate = 0.19 USD/kWh. Sample output: Monthly cost (Plan A): $201.00
Common mistakes
- Using optimistic rates or appreciation assumptions without testing a conservative case.
- Ignoring taxes, insurance, HOA, or maintenance in monthly cost planning.
- Treating modeled outputs as guaranteed quotes rather than planning estimates.
- Not comparing at least two scenarios before making a financing decision.
- Skipping professional review for legal, tax, underwriting, or insurance details.
FAQs
Does this include time-of-use pricing?
No. It assumes one flat usage rate per plan for the estimate.
Can a higher fixed fee still be cheaper overall?
Yes, if the variable rate is low enough for your usage level.
Should I use yearly average kWh?
Monthly average from the past 12 months can reduce seasonality bias in comparisons.
Does this include taxes and surcharges?
No. Add those separately if they differ materially between plans.
Can plan terms change mid-year?
Yes. Review contract terms, escalation clauses, and renewal conditions before switching.