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keys rotate when Xcel re-uploads, so a 404 here means re-harvest the rate books page, not that the document was withdrawn.
THIS IS WHERE OPTING OUT OF TIME-OF-USE PUTS YOU, and it is CHEAPER than Schedule R in winter (14.575c against 15.371c) and DEARER in summer (17.666c against 17.253c) - purely because the same cost recovery is expressed as a percentage of a seasonal base rather than as a flat adder. Nothing about the underlying costs differs.
OPTING OUT OF TIME-OF-USE COSTS A FLAT-LOAD CUSTOMER MONEY. The RE-TOU on-peak window is only 20 of the 168 hours in a week - four weekday hours, with weekends entirely off-peak - so a flat load puts 11.9% of its kWh in it, while the break-even share is about 18.6% in summer and 15.4% in winter. A customer would have to concentrate more than half again as much usage into 5pm-9pm weekdays as chance would give them before this schedule beats staying on RE-TOU.
A customer on R-OO may opt back in to RE-TOU at any time on thirty days' notice, but must then stay on it for twelve consecutive months.
Flat within each season: one rate for every kWh.
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