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Public Service Co of Colorado rate plans
5 residential plans are currently open to new customers. Some charge different prices depending on the hour — which is where most of the savings hide.
How much does the plan you pick actually matter here?
Run the same three-bedroom house with central air through every plan Public Service Co of Colorado files, and the bill lands anywhere between $542 and $1,721 a year. That $1,179 spread is not a difference in electricity — it is the same kilowatt-hours, from the same wires, priced under different rules. Nobody sends you a letter when you are on the wrong side of it.
The plan most households land on by default, Residential Service (Schedule R), comes to about $1,639. The cheapest option here, Residential Demand - Time Differentiated Rates (Schedule RD-TDR), comes to $542 — a gap of about $1,097 a year for a household that never changed a single habit. Whether you can actually capture that depends on when you use power, which is what the calculator below is for.
1 of these 4 plans price by the hour. Those are the ones where moving laundry, dishes, or car charging into the cheap window changes the bill; on the rest, the clock is irrelevant and only the total matters. Which camp you belong in is the first question worth settling, because it decides whether shifting your day is worth anything at all.
Watch the fixed charges too. Across these plans they run from $67 to $190 a year before a single kilowatt-hour is counted. For a small household that difference alone can outweigh the per-kWh price, which is why comparing cents per kilowatt-hour on its own quietly misleads.
Which plan would cost you least?
No bill upload, no sign-up. Tell us roughly what you use and what runs on electricity — we price every plan against the same household and show you the gap.
That adds up to 7,914 kWh a year. Compare it to the total on your bill and adjust until it’s close.
Same usage, different plan
$978a year
That is the gap between the cheapest plan you could be on — Residential Demand - Time Differentiated Rates (Schedule RD-TDR) — and the priciest. Not by using less power. By being billed differently for the same power.
| Plan | Per year | Vs best |
|---|---|---|
| Residential Demand - Time Differentiated Rates (Schedule RD-TDR)One rate, every hour of the year. | $465 | — |
| Residential Demand Service (Schedule RD)One rate, every hour of the year. | $681 | +$216 |
| Residential Service (Schedule R)The hour never matters here — only the season. Rates peak June–September. | $1,375 | +$910 |
| Residential General Service Opt-Out (Schedule R-OO)The hour never matters here — only the season. Rates peak June–September. | $1,391 | +$927 |
| Residential Energy Time Of Use (Schedule RE-TOU)Peak hits 5pm–9pm in Oct–May; 5pm–9pm, 9pm–5pm in Jun–Sep — every day. | $1,443 | +$978 |
An estimate, not a quote. Supply charges move month to month, and your real usage pattern is not exactly this one. What it does show reliably is the gap between plans — both are priced off the same assumptions.
Before you switch anything
- What is a time-of-use electricity rate?
The same kilowatt-hour, priced differently depending on when you use it.
- Should you switch to a time-of-use electricity plan?
A wide peak-to-off-peak gap is a lever, not a saving. Levers need something to move.
- How to compare electricity plans without getting it wrong
Six things that break a comparison, and the order to check them in.
Every plan, in detail
Hour-by-hour schedules, tier thresholds, and the tariff each one comes from.
- Residential Demand - Time Differentiated Rates (Schedule RD-TDR)demand charge
One rate, every hour of the year.
5.0¢ - Residential Demand Service (Schedule RD)demand charge
One rate, every hour of the year.
6.2¢ - Residential Energy Time Of Use (Schedule RE-TOU)time-of-use
Peak hits 5pm–9pm in Oct–May; 5pm–9pm, 9pm–5pm in Jun–Sep — every day.
12.2–38.1¢ - Residential General Service Opt-Out (Schedule R-OO)flat
The hour never matters here — only the season. Rates peak June–September.
15.3–18.3¢ - Residential Service (Schedule R)flat
The hour never matters here — only the season. Rates peak June–September.
15.6–17.3¢