How to lower your electric bill — 30 evergreen tips

HVAC is 40% of the bill — start here

Heating and cooling are the largest line item on every US residential bill. The Department of Energy estimates 40% of an average home's electricity goes to HVAC. The single highest-ROI intervention is the thermostat. The DOE estimates 1°F change moves the HVAC bill 2-3% in summer.

A thermostat set to 78°F (vs 72°F) saves 12-18% on cooling — about $14-22/month on the AC line alone. The same logic applies to winter: 68°F day, 65°F night, 60°F when away saves an estimated 10% on heating. A smart thermostat (Nest, Ecobee, Honeywell T9) automates this and saves 8% on average per Energy Star.

Other HVAC moves that pay back: clean or replace the air filter every 3 months (clogged filters raise runtime 5-15%); seal duct leaks (15-30% air loss in unsealed ducts); annual professional HVAC tune-up ($80-150 cost, returns 8-12% on next year HVAC bill). The thermostat-settings-to-save-money guide covers this in depth.

Water heater — the second-largest line and the easiest fix

Water heating is roughly 18% of an average US bill. A 50-gallon electric water heater set to the factory default of 140°F uses about 4,000 kWh/year — $680 at 17¢/kWh. Lowering the temperature to 120°F (the DOE recommendation) saves 6-10% on water-heating cost, with no comfort loss for most households.

Beyond the temperature setting: insulating the tank with a blanket ($30-50, saves 4-9%); insulating the hot-water pipes for the first 6 feet from the tank ($10-30, saves 1-3%); switching to a heat-pump water heater on next replacement ($1,500-3,000 cost premium over a standard tank, saves 60-70% on water-heating energy use, payback typically 4-6 years).

The water-heater-temperature-savings guide explains the scald-risk caveats and the companion moves in detail.

Clothes dryer and refrigerator — the silent middleweights

A typical US clothes dryer uses 680 kWh/year — about $115/year at 17¢/kWh. Most of that is heating air. Two big wins: clean the lint trap every load (clogged lint traps raise runtime 30%+); clean the vent line annually (clogged vent lines also raise runtime 20-30% and are a fire risk).

A 1996-era refrigerator can use 1,400 kWh/year vs 350 kWh for a modern Energy Star model — a 75% reduction. At 17¢/kWh that is $180/year. Replacement payback is typically 4-7 years on a typical-priced replacement. Other refrigerator wins: clean condenser coils every 6 months (dirty coils raise runtime 15-25%); set temperature to 38°F fridge / 0°F freezer; check the door gasket with a dollar bill — if it slides out easily, the gasket is gone.

The rate-side move — locking the supply rate

All the efficiency interventions in this guide reduce the kWh side of the bill. The supply rate (¢/kWh) is the other lever. In deregulated US states, switching to a fixed-rate supplier contract typically saves 8-15% off the default rate, with no behavioural change required. The how-to-switch-energy-supplier guide walks the 5-minute mechanic.

Locking the rate also removes the rate-change risk that drives most surprise high bills. When the wholesale market spikes (PJM 2026 capacity auction is the recent example), locked customers continue paying their contracted rate while default-rate customers see their next bill jump 10-30%.

The cleanest playbook combines both sides: capture the behavioural and equipment efficiency wins (this guide), AND lock a supply contract (5 minutes through Seenra). Together they routinely produce 20-30% reductions on average bills with minimal disruption.