Skip to content
Tariff data · 2026-08-27
← Public Service Co of Colorado · CO

Residential Demand - Time Differentiated Rates (Schedule RD-TDR)

Does the hour matter on Residential Demand - Time Differentiated Rates? No — one rate, every hour of the year.

  • off-peak5.03¢

There is no peak and no off-peak here: 5.03¢ per kilowatt-hour at 3am is the same as at 6pm, on a Sunday as on a Tuesday, in July as in January. Moving laundry or car charging to another time of day will not change this bill by a cent. What does change it is how much you use, and the fixed charge below, which you pay whether you use anything or not.

What does Residential Demand - Time Differentiated Rates cost a year?

HouseholdUsesA monthPer yearWorks out to
Apartment

One or two people, no central air, no electric heat

4,866 kWh$26$3126.4¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$45$5425.7¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$60$7265.5¢ / kWh

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.

What you actually pay

PeriodRateApplies when
off-peak5.03¢midnight–midnight

Plus a fixed charge of $5.6 per month.

This plan also bills a demand charge based on your highest single hour of usage. We don’t price that yet, so treat any total here as incomplete.

Should you be on Residential Demand - Time Differentiated Rates?

This plan bills a demand charge on top of the per-kWh rates: a fee tied to your single highest hour of the month. Two homes using the same total electricity can pay very different amounts if one of them runs the dryer, the oven, and the car charger at the same moment. We do not price demand charges yet, so treat every dollar figure on this page as a floor, not a total.

Before a single kilowatt-hour moves, this plan charges $67 a year in fixed fees. On the apartment above that is 22% of the whole bill; on the house with a car charging in it, 9%. 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.

Expect the bill to move with the calendar. The same family home costs about $61 in July and $36 in February — a $25 spread driven by heating and cooling far more than by anything you chose. Budget against the July figure, not the average, and a summer bill stops being a surprise.

Other Public Service Co of Colorado plans

Who can be on Public Service Co of Colorado’s Residential Demand - Time Differentiated Rates (Schedule RD-TDR)?

Eligibility is not our judgement — it is written into the tariff Public Service Co of Colorado filed. This is what that document says:

In 2017, service under this rate schedule shall be limited to the first 10,000 Residential Customers electing to receive service. This total participation cap will increase to 14,000 Residential Customers in 2018 and 18,000 Residential Customers in 2019. Upon notification by a Customer that Customer is requesting service, the Company will install the proper Service Meter to allow the Company to measure service hereunder.

Quoted from the filed tariff. Your utility decides eligibility, not us; check with them before you switch.

If this is new to you

Where this comes from

Effective
2024-01-01

the date this tariff took effect

Covers
delivery + supply

the ZIP-code service map lists this territory as bundled, so the utility sells delivery and supply together

Enrollment
open to new customers

Tariff document: https://www.xcelenergy.com/staticfiles/xe-responsive/Company/Rates%20&%20Regulations/Regulatory%20Filings/PSCo_Electric_Entire_Tariff.pdf