The best TEP plan for a Tucson AC is the one that matches when your AC actually runs. Only your own bill history can settle that, so start there. Climate Pros Tucson doesn’t sell power or plans; we match homeowners with licensed HVAC pros, and the system side of the bill is where they help.

Which plans does TEP list for homes?

TEP lists Time-of-Use as its residential plan, with Basic, Peak Demand and Demand TOU shown as alternatives, as of October 2026. TEP’s own time-of-use page is the place to read the current terms. Rates and rules change, so treat any plan summary, including this one, as a starting point.

Customers of Trico Electric Cooperative are on a different utility. Trico serves northwest Tucson and Marana south to Green Valley and Sahuarita. If that’s you, ask Trico which plans it offers.

When does the summer peak hit?

TEP’s summer on-peak runs May to September, Monday to Friday, 3 to 7 p.m. In winter, October to April, the on-peak windows are 6 to 9 a.m. and 6 to 9 p.m., Monday to Friday.

That summer window lands on the hottest part of a Tucson day. The 1991-2020 normals at Tucson International Airport put the June normal high at 101.2F and July at 100.2F. Your AC is working hardest right when a time-based plan charges the most. A plan that looks cheap on paper can cost more for a house that cools all afternoon.

How do you compare plans for your own house?

  • Pull a full year of bills from your TEP account and note the summer months.
  • Look at how much of your use falls on weekday afternoons versus nights and weekends.
  • Ask TEP to run your actual usage against the plans it lists.
  • Ask again after any big change, like a new system or a new work-from-home schedule.

A house that’s empty on weekday afternoons behaves differently from one with someone home. The plan that suits one can punish the other.

Does pre-cooling help?

Pre-cooling means running the AC harder before 3 p.m., then letting the house drift upward during the peak. It can shift your use out of the expensive window. It has limits in Tucson.

  • A struggling or undersized system may never catch up on a 100F+ afternoon.
  • A leaky house loses the stored cool fast, and ENERGY STAR says a typical forced-air house can lose about 20% to 30% of its duct airflow to leaks and poor connections.
  • Dropping the setpoint far below normal adds long runtime on an older unit, so ask the pro what it can handle.

A programmable or smart thermostat makes the schedule easy. Ask the pro you’re matched with whether your system can hold a pre-cool and a drift.

Does a new system change the answer?

It can. A heat pump also heats in winter, so the 6 to 9 a.m. and 6 to 9 p.m. winter windows start to matter for your bill. Our heat pump vs AC guide covers that tradeoff.

TEP’s Efficient Home Program also lists instant rebates through participating contractors. As listed by TEP in October 2026, that’s up to $720 for a heat pump quality installation and up to $600 for an AC quality installation. Amounts change, so confirm with TEP or the contractor at quote time.

For the rest of the bill, read why your TEP bill is so high in summer and how to lower your AC bill in Tucson. Our HVAC hub for the Tucson area lists where we cover, and HVAC maintenance keeps the system efficient on any plan.

When the bill points to the equipment

If your bill keeps climbing and the AC seems to run nonstop, the system may need a look. Call (520) 353-2520 and we’ll match you with a licensed local pro.