What this calculator does
The Electric Rate Increase Bill Calculator estimates how a percentage electricity rate increase changes your monthly bill. It is designed for people who see news about a utility rate case, a new tariff, a power cost adjustment, or an approved rate hike and want to understand the household-level impact.
Quick answers
Formula
When this estimate is useful
This calculator works best when a utility announces a broad percentage increase and your household usage is similar to your recent bill. It is less exact for tiered rates, seasonal rates, demand charges, time-of-use plans, solar net billing, or separate delivery and supply changes.
How to use the most current data
- Use the most recent bill amount instead of an old monthly average.
- Use the proposed or approved percentage increase from the latest notice.
- Add any fixed customer charge increase separately.
- Run a high-usage summer bill and a low-usage winter bill if your usage swings a lot.
Example electric bill impact
If your current electric bill is $180 and the rate increase is 8.5%, the estimated new bill is $195.30 before fixed fee changes. That is about $15.30 more per month, $183.60 more per year, and $550.80 over three years if usage stays similar.
| Input | Why it matters |
|---|---|
| Current monthly bill | Best quick proxy for your household's actual usage and rate structure. |
| Rate increase percentage | Represents the reported or approved bill/rate increase. |
| Fixed fee increase | Captures customer charge changes that apply even if usage is low. |
| Monthly kWh | Helps translate the bill into an estimated cents-per-kWh figure. |
Limitations
This is a planning estimate, not a utility bill audit. Real bills may include tiered energy charges, delivery fees, fuel adjustments, taxes, local surcharges, time-of-use windows, solar credits, demand charges, and weather-driven usage changes.