How to Reduce Your Heating Bill (2026)

A heat pump moves heat instead of making it, so it delivers roughly 64% cheaper heat than electric resistance and beats oil and propane per BTU too. Against a modern natural gas furnace at US average prices it costs more to run, so it is not a saving for everyone. Size the payback on the full installed price: the federal credits for heat pumps (IRC §25C) and residential clean energy (§25D) both terminated for property placed in service after 31 December 2025. If your electric heating runs near EIA's forecast $1,133 a winter, cutting it by about two thirds saves roughly $728 a season — so a $6,000–$10,000 installation takes the better part of a decade to repay.

ENERGY STAR's Seal & Insulate methodology puts the saving at an average of 15% of heating and cooling costs — about 11% of total household energy — for air sealing combined with attic, floor and crawlspace insulation. That is the whole package, not attic insulation alone, and the 15% figure includes the summer cooling saving. On EIA's forecast heating expenditure it is worth about $96–$209 a winter, which is why this is a comfort-and-durability investment as much as a payback one. The §25C credit that used to cover 30% of insulation work ended for work placed in service after 31 December 2025.

This is the Department of Energy's headline number and it is stated as a whole-year figure: about 10% a year on heating and cooling for a 7–10°F setback held 8 hours a day. Applied to EIA's forecast heating expenditure that is roughly $64–$139 over the winter depending on your fuel. Ignore the widely repeated "3% per degree, per hour" — the arithmetic is incoherent, and the worked examples people quote alongside it are really 3% per degree in total.

ENERGY STAR's own estimate for a certified smart thermostat is about 8% of heating and cooling costs, roughly $50 a year. The $140–$180 figure in circulation is three to four times that. The saving comes from the schedule actually being kept, so a $25–$50 programmable model captures most of it; the extra money buys occupancy sensing, remote control and reporting rather than a much bigger saving.

Lower the central thermostat and heat only the room you occupy. A 1,500 W heater costs about $0.28 an hour at 18.44¢/kWh — the same for a ceramic, convection, infrared or oil-filled unit, because all of them turn essentially 100% of the electricity into heat. Heating a 2,000 sq ft home with gas averages about $0.23 an hour across a winter month, so against gas the heater can cost more than the furnace it displaces. Against electric baseboard, oil or propane it is a clear win. Also count the cost of the rest of the house sitting at 62–65°F rather than 68°F: that setback is doing much of the work.

Air infiltration accounts for 25–40% of heating energy loss in homes built before 2000, and it is the half of the insulation package a homeowner can do alone in a weekend. Foam weatherstripping ($5–$15 per door), door sweeps ($10–$25), and caulk around window frames, rim joists and pipe penetrations ($3–$8 per window) are the highest-value materials in the hardware store. Treat the saving as the leading share of the 15% air-sealing-plus-insulation figure rather than something additional on top of it.

The Department of Energy's window coverings guidance is specific about which product does what: conventional draperies cut heat loss through the window by around 10%, while tight-fitting insulated cellular shades reach roughly 40%. "Thermal blackout curtain" claims of 25–45% belong to the cellular shade, not the curtain. Either way this is a percentage of the loss through the glass, and glazing is only one part of a whole-house heat loss, so do not expect a 40% bill.

Single glazing is about R-1. Shrink film adds a trapped air layer and takes it to roughly R-1.5–R-2 — not R-3 — which cuts conductive loss through that pane by something like a third to a half. Because windows are a minority of a whole-house heat loss, the bill effect is modest; the reason to do it is that it costs a few dollars a window and also stops the cold-glass draught that makes people push the thermostat up.

This is the most underrated free tactic on the list. On a clear winter day, solar gain through south-facing glazing is on the order of 100–250 BTU per square foot per hour around solar noon — so a single 15 sq ft window can deliver a couple of thousand BTU an hour, comparable to a small space heater, for nothing. Open them in the morning, close them (and any insulated shades) as soon as the sun is off the glass, because the same window is a heat-loss surface all night.

Most tanks ship set to 140°F. Lowering to 120°F saves 6–10% on water heating and removes a scalding risk. Water heating is about 18% of the average US household energy bill — often as much as space heating in a mild climate — so it is worth doing on the same afternoon you set up the thermostat schedule.

The often-quoted "5–15%" belongs to a different claim: the Department of Energy's figure is for the energy an air conditioner uses when its filter is clogged. For heating, a blocked filter mainly restricts airflow, which cuts comfort and can trip a furnace's high-limit switch or ice a heat pump's coil. Change it because it protects the equipment, not because it will show up as a line on next month's bill.

Both of these are comfort tactics rather than measurable energy tactics, and that is fine — comfort is what determines the number on the thermostat. Running a ceiling fan clockwise at low speed pushes air that has stratified at the ceiling back down the walls; rugs on bare tile and hardwood take the chill off underfoot. Neither has a published percentage saving worth quoting. Their value is that they let you sit comfortably a degree or two lower, and it is the setpoint that shows up on the bill.