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CPS Energy (San Antonio) rates

CPS Energy has one residential plan modelled here. A typical Texas home using 1,103 kWh a month pays about $144 a month.

Municipal 865,914 residential customers (EIA-861, 2024) Tariffs checked September 28, 2026

Typical all-in priceRE

01234567890123456789.0123456789¢/kWh
RE$144/mo

Residential plans

PlanTypeFixed/moJuly pricesJanuary pricesJuly weekday windows
RE
Residential Service		 Tiered $9.50 11.6¢ 0–600 kWh · 13.8¢ over 600 kWh 11.6¢ all hours None

Charging an EV on CPS Energy

1,000 miles a month in a Tesla Model Y Long Range AWD (275 kWh from the wall, EPA 27.5 kWh/100 mi) at 7.2 kW, added to a typical Texas home’s use, on each plan’s cheapest start hour versus plugging in at 6 pm. Averaged over the year.

PlanBest startCharging, best startCharging from 6 pmWhole bill with EV
REAny$34/mo$34/mo$178/mo

With an EV charged at its best hour, the cheapest plan overall is RE. Compare plans on your own usage.

How CPS Energy’s plans work

RE (Residential Service). In July the first 600 kWh a month cost 11.6¢ each; then 13.8¢ above 600 kWh a month. An average Texas home (1,581 kWh in July) goes past the first tier, so extra load such as an EV is priced higher. Fixed charge: $9.50 a month.

Prices on this page are all-in per kWh, before taxes: base rates, supply and every per-kWh rider in the utility’s current tariff sheets. Your bill shows them as separate lines, and riders can change between tariff revisions.

As a cross-check, CPS Energy billed its residential customers an average of 12.43¢ per kWh in 2024 (revenue ÷ sales, EIA-861). A plan taken from URDB is shown only if its all-in price is consistent with that figure, adjusted for Texas’s price change since.

Sources for each plan

PlanEffectiveSeasonsSolar exportsSource and status
RE
Transcribed from the utility’s tariff		 September 1, 2026 Summer pricing Jun–Sep; winter Oct–May Not recorded in URDB Checked September 28, 2026
CPS Energy Residential Service Electric Rate RE (effective February 1, 2024) · CPS Energy Retail Electric Fuel/Regulatory Adjustment Factors, September 2026 · CPS Energy rates page (current rate schedules)

Plans marked “Checked” were transcribed from the utility’s current tariff and rider sheets, all charges included, and are re-checked on the date shown in each file. Other plans come from the OpenEI U.S. Utility Rate Database (CC BY 4.0) and have not yet been checked line by line against the utility’s tariff. Always confirm the current rates on your utility’s website before switching plans.

Run the numbers on CPS Energy

EV charging cost Which plan is cheaper Best time to run things Appliance cost Solar payback Heat pump vs gas