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Seattle City Light Residential Time of Use

Selecting one of these encoded periods in a CalcuRiver calculator changes the actual calculation. The state average remains visible beside it as a benchmark.

State benchmark14.71¢/kWhEIA statewide residential average
Featured utility period8.05¢/kWhSeattle city TOU off-peak

Encoded tariff periods

All period choices stay inspectable; CalcuRiver never hides the rate behind a single blended number.

8.05¢/kWhAll year · Off-peak12–6 a.m. daily
14.09¢/kWhAll year · Mid-peak6 a.m.–5 p.m. and 9 p.m.–12 a.m. Mon–Sat; Sunday/holidays 6 a.m.–12 a.m.
16.1¢/kWhAll year · Peak5–9 p.m. Mon–Sat, excluding observed holidays
SeasonPeriodHoursEnergy priceBoundary
All yearOff-peak12–6 a.m. daily8.05¢/kWhSeattle city jurisdiction.
All yearMid-peak6 a.m.–5 p.m. and 9 p.m.–12 a.m. Mon–Sat; Sunday/holidays 6 a.m.–12 a.m.14.09¢/kWhSeattle city jurisdiction.
All yearPeak5–9 p.m. Mon–Sat, excluding observed holidays16.1¢/kWhSeattle city jurisdiction.

Use this plan in the shared calculator engine

The links preselect this utility. EV charging opens the recurring charging-window profile; other tools keep an explicit verified-period selection unless their own schedule model applies.

EV chargingAppliance costSolar retail-value
Calculation boundary. These periods apply to the Seattle city jurisdiction. Other City Light jurisdictions have different prices. The daily base service charge is not allocated to an appliance or EV session.

Rate version & freshness

Version IDcr.seattle-city-light.residential-tou.2026-01-01.v1
Effective from2026-01-01
Effective toOpen / no verified end date
Last verified2026-09-28
FreshActive

This tariff snapshot is versioned and source-attributed. When a verified rate changes, CalcuRiver keeps this version in history and adds a new one instead of silently overwriting it.

Official source

Seattle City Light official residential rates / TOU page

Open official plan →
Effective/source status: 2026-01-01. Reviewed Sep 28, 2026.

Automatic TOU schedule

This plan is connected to CalcuRiver’s v0.5.3 usage-time engine. A date/time or recurring charging window can be resolved through America/Los_Angeles into the verified season, weekday/weekend/holiday rule and versioned tariff period. Schedule status: complete. EV charging windows are split across all applicable TOU periods and returned with an inspectable weighted-rate breakdown.

plan context

Plan vs. Washington benchmark

State benchmark14.71¢/kWh
Lowest encoded period8.05¢/kWh
Highest encoded period16.10¢/kWh
Effective from2026-01-01
Last verified2026-09-28
Plan typeTime-of-use

Encoded periods are used only for the contexts supported by this tariff model. CalcuRiver does not turn one TOU period into a fake all-in monthly bill.

Official source: Seattle City Light official residential rates / TOU page.