The single most effective way to lower your summer electric bill is one most advice skips: pay less per kilowatt-hour. Usage tips matter — raising your thermostat and using fans genuinely help — but they typically save 10-20% at best. Shopping for a lower electricity rate in deregulated states can save 20-30%, with zero lifestyle changes.
This guide ranks 10 real tips by actual impact, starting with the largest lever. Most lists bury the rate-shopping tip or ignore it entirely because energy companies write them.
1. Switch to a lower-rate supplier (if in a deregulated state)
Potential savings: 20-30% of total bill ($30-80/month)
If you live in a deregulated electricity state — Pennsylvania, Texas, Ohio, Illinois, New Jersey, New York, Maryland, or Massachusetts — you can choose your electricity supplier. Most households never exercise this option and pay their utility's default rate, which is often higher than competitive alternatives.
In Pennsylvania, utility default rates (the "Price to Compare") currently range from 11-14¢/kWh. Competitive suppliers offer rates as low as 9-10¢/kWh. For a household using 1,000 kWh/month in summer, that 3-4¢ difference is $30-40/month.
This is the largest single lever for most households. A rate reduction applies to every kilowatt-hour you use. You don't have to change any behavior. Your utility still handles delivery, billing, and outages. The only thing that changes is what you pay per kWh.
Compare rates for your area: Pennsylvania electricity plans
2. Raise your thermostat by 5°F
Potential savings: 15% of cooling costs ($15-40/month)
Each degree you raise your thermostat above 72°F reduces cooling costs by approximately 3%. Raising from 72°F to 78°F — the Department of Energy's recommended setting when home — can reduce AC costs by 15-18%.
At 1,000 kWh monthly summer usage with $150 going to cooling, that's $22-27/month.
The practical floor depends on your comfort tolerance. Most people can adapt to 76-78°F, especially with ceiling fans. Going higher becomes uncomfortable for many households.
3. Use ceiling fans with AC
Potential savings: 8-12% of cooling costs ($10-30/month)
Ceiling fans don't cool rooms — they cool people. Moving air creates a wind-chill effect that makes 78°F feel like 74°F. This allows you to raise your thermostat 4°F while maintaining the same comfort level.
A ceiling fan uses about 30-50 watts. An AC uses 1,000-6,000 watts. Running fans instead of lowering the thermostat is dramatically cheaper.
Turn fans off in unoccupied rooms. They cool people, not spaces.
4. Block direct sun on windows
Potential savings: 10-15% of cooling costs ($10-25/month)
Solar heat gain through windows can add 10-20% to your cooling load. Every square foot of sun hitting glass turns into heat your AC must remove.
Effective solutions, from simple to comprehensive:
- Curtains and blinds: Close them on sun-facing windows during peak hours. White or reflective backings work best.
- Blackout shades: Block nearly all solar gain. Effective but make rooms dark.
- Window film: Reduces solar heat while maintaining visibility. Permanent solution.
- Exterior shading: Awnings, shutters, or strategically placed trees. Most effective but most expensive.
South and west-facing windows matter most in summer. East-facing windows get morning sun when temperatures are lower.
5. Service your AC unit
Potential savings: 5-15% of cooling costs ($5-20/month)
A dirty air filter restricts airflow and makes your AC work harder. The Department of Energy estimates a clogged filter increases energy consumption by 5-15%.
Check your filter monthly during summer. Replace it if it looks dirty. This takes two minutes and costs $5-15 for a filter.
Annual professional service (typically $75-150) catches other issues: low refrigerant, dirty coils, failing capacitors. A well-maintained AC runs more efficiently than a neglected one.
6. Time-shift heavy appliances
Potential savings: 3-8% of total bill ($5-15/month)
Running your dishwasher, clothes dryer, and oven during the hottest part of the day does two things: draws electricity during peak demand, and generates heat your AC must remove.
Shifting laundry and dishwasher cycles to after 9pm or early morning reduces the heat your AC fights against. In areas with time-of-use rates, running appliances off-peak can also cost less per kWh.
This won't transform your bill, but it helps at the margins.
7. Unplug phantom loads
Potential savings: 5-10% of total bill ($5-15/month)
Devices on standby — TVs, game consoles, chargers, computers — draw power even when "off." This phantom load accounts for 5-10% of residential electricity use.
Smart power strips make this easier: plug entertainment centers and home office equipment into strips that cut power when the main device is off. Unplugging chargers when not in use helps too.
The savings are real but modest. Focus here after addressing the bigger levers.
8. Use a smart thermostat
Potential savings: 8-15% of cooling costs ($10-25/month)
A smart thermostat learns your schedule and adjusts temperatures automatically. When you're away, it lets the house warm up. Before you return, it cools down. At night, it can adjust based on sleep patterns.
The Department of Energy and manufacturers claim 10-15% savings on heating and cooling. Real-world results vary, but 8-12% is reasonable for households that previously used manual thermostats at constant settings.
Upfront cost is $100-250. At $15/month savings over a 5-month cooling season, payback is 1-3 years.
9. Seal air leaks
Potential savings: 5-10% of cooling costs ($5-20/month)
Conditioned air escaping through gaps around windows, doors, electrical outlets, and attic hatches means your AC runs longer. The Department of Energy estimates air leaks account for 25-40% of heating/cooling energy loss in typical homes.
Focus on:
- Weatherstripping around doors and operable windows
- Caulk around window frames and where utilities enter
- Foam gaskets behind outlet and switch plates on exterior walls
- Attic hatch insulation and sealing
Materials cost $20-50. A weekend afternoon of sealing can noticeably reduce AC runtime.
10. Consider LED lighting
Potential savings: 2-5% of total bill ($3-10/month)
LEDs use 75% less electricity than incandescent bulbs and produce 90% less heat. Less heat means less cooling load for your AC.
If you're still running incandescent bulbs, replacing them with LEDs reduces both lighting costs and cooling costs. The upfront cost of LEDs has dropped dramatically — decent bulbs are now $2-5 each.
This matters more in high-usage lighting scenarios (kitchen, home office) than in areas where lights run briefly.
Honest reality check: what these tips actually save
Adding up the potential savings above would suggest 70-100% savings. That's not how it works.
The tips overlap: raising your thermostat and using fans address the same cooling load. Sealing air leaks and servicing your AC both improve system efficiency. You can't stack every percentage.
Realistic combined savings from usage tips: 10-25% of your summer bill
Realistic savings from rate shopping (in deregulated states): 20-30% of your summer bill
For a household with a $250 summer electric bill:
- Usage tips alone: $25-60 monthly savings
- Rate shopping alone: $50-75 monthly savings
- Both together: $75-100 monthly savings
Rate shopping is the bigger lever — and the one most households have never pulled.
PA-specific: how to actually lower your rate
Pennsylvania residents have had electricity choice since 1996. Here's how it works:
Your utility (PECO, PPL, Duquesne Light, Met-Ed, Penelec, Penn Power, or West Penn Power) delivers electricity to your home. This "distribution" side is regulated and the same regardless of supplier.
The "supply" side — who generates the electricity — is open to competition. Your utility's default supply rate is the "Price to Compare." As of June 2026, these rates range from about 11¢ to 14¢/kWh depending on your utility.
The Pennsylvania Public Utility Commission maintains PA Power Switch, a comparison site showing all licensed suppliers and current rates. Many offer rates below 10¢/kWh.
Switching takes 5 minutes online. You don't contact your utility. Your billing continues through your utility as always. The switch happens within 1-2 billing cycles. There's no service interruption.
If rates rise, you can switch again — most plans have no early termination fee, and those that do are typically $50-100.
For households serious about lowering summer bills, this is the first thing to check — before touching the thermostat.
When usage tips aren't enough
Some bills are high because of usage. Others are high because of rates. A few are high because something is wrong.
Signs your bill is unusually high:
- 50%+ increase year-over-year with no change in habits
- Bills inconsistent with neighbors in similar-sized homes
- No explanation from usage or rate changes
If usage tips and rate shopping don't explain a high bill, check for:
- Faulty appliances (a failing refrigerator or AC compressor can draw excessive power)
- Meter errors (rare but possible — you can request a test)
- Unusual loads (a pool pump running 24/7, for instance)
For a deeper dive, see our guide: Why Is My Electric Bill So High in the Summer?
FAQ
How much can I realistically save with these tips?
Usage tips typically save 10-25% of your summer bill. Rate shopping in deregulated states can save an additional 20-30%. Combined, a household with a $250 summer bill might save $75-100/month. The exact savings depend on your current rate, your usage patterns, and which tips are relevant to your home.
What's the single biggest action I can take?
If you're in a deregulated state (Pennsylvania, Texas, Ohio, etc.), check whether your current electricity rate is competitive. Many households pay utility default rates 2-4¢/kWh higher than available alternatives. For a 1,000 kWh/month summer usage, that's $20-40/month in savings with no behavior change. Compare rates at PA electricity plans.
Is it cheaper to leave AC running or turn it on and off?
Turning AC off (or raising the thermostat to 85°F+) when you're away for extended periods generally saves money. Modern AC systems cool a warm house more efficiently than the outdated advice suggested. For short absences (2-3 hours), the savings are minimal and the comfort tradeoff may not be worth it. A programmable thermostat handles this automatically.
Should I get a smart thermostat?
If you currently have a manual thermostat and tend to leave it at a constant setting, a smart thermostat can save 8-15% on cooling costs. At $100-250 upfront and $10-25/month savings during cooling season, payback is 1-3 years. If you already adjust your thermostat when leaving and returning, the incremental benefit is smaller.
Why is my summer bill so much higher than my winter bill?
Air conditioning is the primary driver. AC units consume 1,000-6,000 watts — far more than most other appliances. Running central AC 6-10 hours daily adds 400-900 kWh/month to your usage. In Pennsylvania, where most heating is natural gas, the summer electric bill is often 50-100% higher than the spring or fall bill due to AC alone.