Transcription notes recorded when this tariff was encoded, including anything deliberately left out.
VERIFIED AGAINST XCEL'S OWN ALL-IN TOTALS. The Colorado Electric Rates Summary prints, for every schedule, the base charge, each named adjustment, a subtotal, the RESA uplift and a Total Monthly Rate. These figures reproduce that Total column exactly, and the build script refuses to write this file if they stop doing so. No other utility here publishes its own arithmetic.
THREE RESIDENTIAL SCHEDULES, AND WHICH ONE YOU ARE ON DEPENDS ON YOUR METER. Schedule R applies until the customer receives an Advanced Meter. At that point they are moved to RE-TOU automatically unless they opt out, and opting out puts them on R-OO. So all three are live at once and a customer moves between them without changing address or usage.
SCHEDULE R AND SCHEDULE R-OO FILE IDENTICAL BASE RATES AND BILL DIFFERENTLY. Both are $7.10 plus 10.380c summer and 8.570c winter. Schedule R's seven cost-recovery adjustments are filed as cents per kWh; R-OO's are filed as percentages of the base. Winter lands at 15.371c against 14.575c. Reading either rate sheet alone gives you no way to tell them apart.
EVERY ADJUSTMENT HAS ITS OWN EFFECTIVE DATE and they do not line up - grid modernization and purchased capacity from 1 January 2026, wildfire mitigation and demand-side management from 1 July 2026. The Electric Commodity Adjustment resets quarterly and at 29% of base is by far the largest single term.
THE REVENUE DECOUPLING ADJUSTMENT IS SUMMER-ONLY, LANDS AFTER THE PERCENTAGES, AND DIFFERS BY SCHEDULE - 0.013c for R and R-OO, 0.068c for RE-TOU on-peak, nothing at all for RE-TOU off-peak. It is small enough to look like a rounding artifact and is not one.
EXCLUDED: Colorado municipal franchise fees and state, city and county taxes, all of which depend on the customer's address. Also excluded: the $2.55 production and load meter charges, which apply only to customers with on-site generation, and the year-round Medical Exemption rate of 7.749c, which is an enrolment-gated programme rather than a general rate.
THE DOCUMENTS ARE ON SALESFORCE FILES and answer a plain HTTP request with a 1,359-byte delivery shell at HTTP 200. They are fetched through a browser - see rategrid/ingest/salesforce.py. The distribution keys rotate when Xcel re-uploads, so a 404 here means re-harvest the rate books page, not that the document was withdrawn.
THE DEFAULT RESIDENTIAL RATE IN COLORADO. Every customer is moved on to it on receiving an Advanced Meter unless they actively opt out. This is not an opt-in TOU pilot.
A FOUR-HOUR ON-PEAK WINDOW: weekdays except holidays, 5pm to 9pm Mountain. Everything else, including all weekend hours, is off-peak. There is no shoulder or mid-peak period, which makes this simpler than the California TOU schedules and much peakier - summer on-peak (36.254c) is 2.7 times off-peak (13.408c).
HOLIDAYS ARE NOT MODELLED. Sheet 33C exempts holidays from the on-peak period; this encoding treats every weekday alike, so a holiday falling on a weekday is priced about 13c/kWh too high for four hours. Roughly ten hours a year at stake.
The monthly minimum is the service and facility charge alone.
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