Domestic Service: D - Baseline Region 10

Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.

The hour of day does not change what you pay here — the month does. Running the same house through the full year, July costs about $418 and February about $226. That $192 swing is part rate and part weather, and it is the reason a budget built on your spring bill will break in July.

There is a usage cliff to watch. The first 12.1 kWh you use each day are billed at 33.6¢; past that line the rate steps up to 43.2¢ — 29% more for every unit after. The last kilowatt-hour of a heavy month is the expensive one, which is why cutting a little off a big month saves more than cutting the same amount off a small one.

Before a single kilowatt-hour moves, this plan charges $11 a year in fixed fees. On the apartment above that is 1% of the whole bill; on the house with a car charging in it, 0%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.

Measured against the other residential plans this utility files, a family home lands 9th cheapest of 25. The cheapest option, TOU-D-PRIME, would run about $1,272 a year less.

Against Domestic Service: D - Baseline Region 5, which looks like the plan you land on by default, this one comes out $120 more per year (3%). We infer the default from the tariff structure rather than a flag in the data, so confirm it against your own bill before you switch.