Why Your Texas Apartment Electric Bill Spikes in Summer (and What to Do)

If your Texas apartment electric bill doubled or tripled this summer, you are not alone and you are not doing anything wrong. Summer electricity costs in Texas routinely run two to three times higher than spring and fall bills — and the reasons are specific, predictable, and in most cases manageable with the right preparation.

This page explains exactly why summer bills spike, what typical summer bills look like in DFW and Houston, and what actions actually reduce the cost rather than just shifting it around.

Why Texas Summer Electric Bills Are So High

Air Conditioning Is the Dominant Load

In most other U.S. climates, air conditioning is a summer convenience. In Texas, it is a necessity that runs nearly continuously for three to four months. Air conditioning accounts for 50 to 70 percent of a typical Texas apartment's electricity use in summer — not a sliver of the bill, but the bill itself.

Dallas averages daily high temperatures above 96°F in July and above 95°F in August. Houston adds humidity that makes the effective temperature feel 5 to 10 degrees higher. An apartment AC unit that runs 10 to 12 hours per day in summer uses 600 to 900 kWh in that category alone, before accounting for any other electricity use in the unit.

ERCOT Wholesale Prices Peak in Summer

Texas operates the ERCOT deregulated electricity market. Retail electricity providers buy power on the ERCOT wholesale market and sell it to consumers at a markup. During summer heat events — particularly when demand spikes and multiple large generators are offline for maintenance — ERCOT wholesale prices can spike dramatically, sometimes reaching 50 to 100 times their typical levels for hours at a time.

Renters on fixed-rate plans are fully shielded from these spikes. The REP absorbs the wholesale price risk. Renters on variable-rate or month-to-month plans are directly exposed: their monthly bill reflects the REP's cost of power, which can be dramatically higher during heat events. This is the primary reason some Texas renters received $400 to $600 summer bills in units that cost $120 per month in the spring.

Texas Apartment Units Run Hot

Many Texas apartments were built with standard residential insulation standards that are adequate for mild climates but undersized for sustained extreme heat. South- and west-facing units absorb significant solar heat load in the afternoon hours. A west-facing window receives 200 to 300 watts of radiant heat per square foot during the 2 PM to 6 PM peak window. Older HVAC units with lower SEER ratings work harder and use more electricity than modern high-efficiency systems to achieve the same cooling result.

What Typical Summer Bills Look Like in Texas

Estimates assume a fixed rate of approximately 12–13 cents per kWh all-in and a thermostat set to 76–78°F during occupied hours. West-facing units and older HVAC systems run 15 to 25 percent higher than these figures. Renters on variable-rate plans may see significantly higher costs during heat events.

Six Things That Actually Reduce Your Summer Bill

Switch to a Fixed-Rate Plan Before Summer Starts

If you are on a variable-rate or month-to-month electricity plan, switching to a fixed-rate plan is the most impactful action you can take before summer. Texas renters can switch providers at any time — the switch typically takes 1 to 3 business days and there is no service interruption. Check your current contract for early termination fees before switching. If you are month-to-month, there is typically no ETF.

Set Your Thermostat to 78°F When Home, 82–85°F When Away

Each degree below 78°F adds approximately 3 percent to your cooling costs. A thermostat set to 72°F uses roughly 18 percent more electricity than one set to 78°F under the same outdoor conditions. Raising from 72°F to 78°F on a $160 July bill saves approximately $28. Using the away setpoint (82–85°F) when the unit is empty for more than two hours saves additional cost — though turning the AC completely off allows indoor temperatures to reach 90°F or higher, which costs more to recover than running a higher setpoint throughout the day.

Block Afternoon Sun on West- and South-Facing Windows

West- and south-facing windows admit the most solar heat during afternoon peak hours. Blackout or thermal curtains kept closed from noon to 6 PM significantly reduce the heat entering the unit, lowering the AC load by 5 to 10 percent on the hottest days. This is one of the lowest-cost actions with consistent summer savings — a single blackout curtain costs $20 to $40.

Check and Replace the AC Filter

A dirty air filter restricts airflow and forces the AC unit to work harder, increasing electricity use by 5 to 15 percent. During peak summer, filters in Texas apartments should be checked monthly. If your building maintains the HVAC units, submit a maintenance request — this is almost always covered under your lease at no cost to you.

Run Heat-Generating Appliances at Night

The dishwasher, dryer, and oven all add heat to the apartment while running. Running them after 9 PM, when outdoor temperatures have dropped and the AC load has decreased, reduces the marginal cooling cost that would otherwise offset any savings. During a Texas summer, shifting these tasks to the evening can save a few kilowatt-hours per week.

Use Ceiling Fans to Extend AC Efficiency

Ceiling fans do not lower air temperature — they create a wind-chill effect that makes the same temperature feel 3 to 4 degrees cooler. Running a ceiling fan allows you to raise the thermostat setpoint by 2 to 3 degrees without a change in perceived comfort, reducing AC runtime and electricity use. A ceiling fan uses approximately 15 to 60 watts — far less than the 1,500 to 3,500 watts an AC compressor draws. Turn off ceiling fans when leaving the room, as the cooling effect only works on people present.

Frequently Asked Questions

Why is my Texas apartment electric bill so high in summer?

Texas apartment bills spike in summer because air conditioning accounts for 50 to 70 percent of typical electricity use, Texas summers are extreme (DFW and Houston regularly exceed 95°F for weeks at a time), and renters on variable-rate plans are exposed to ERCOT wholesale price spikes during heat events. Fixed-rate plan renters experience higher usage-driven costs but are protected from rate spikes.

What is a normal summer electric bill for a Texas apartment?

A normal July or August electric bill for a one-bedroom Texas apartment runs $130 to $185 per month on a fixed-rate plan with the thermostat set to 76–78°F. Studios run $110 to $150. Two-bedrooms run $170 to $240. Bills on variable-rate plans can run significantly higher during heat events.

How much does AC cost to run in a Texas apartment in summer?

Air conditioning in a Texas apartment typically accounts for $70 to $130 per month in summer, representing 50 to 70 percent of the total bill. A 2-ton central AC unit running 8 hours per day at 12 cents per kWh adds approximately $57 per month; at 12 hours per day during peak summer, the cost rises to approximately $85 per month.

Should I keep my AC on when I am not home in Texas summer?

Yes, but raise the setpoint to 82–85°F rather than turning it off. Turning the AC completely off allows indoor temperatures to reach 90°F or above, and the energy required to cool back down often exceeds the savings from the off period. A raised setpoint while away is the most cost-effective approach.

Can my electricity plan affect how high my summer bill gets?

Yes, significantly. Renters on variable-rate or month-to-month plans are exposed to ERCOT wholesale price spikes during summer heat events, which can push monthly bills two to three times higher than fixed-rate equivalents. Switching to a fixed-rate plan before summer is the most effective way to reduce summer bill risk.