How to lower your energy bill

Heating and cooling dominate the typical household bill, which means the thermostat is the highest-leverage control in the house. Adjusting the set temperature by a few degrees in the direction of the outside temperature — warmer in summer, cooler in winter — reduces consumption meaningfully, and doing it while you are asleep or out costs nothing in comfort.

A programmable or smart thermostat automates that, which matters because the saving comes from consistency rather than from any single adjustment. Many utilities offer rebates on them, and some will supply one at reduced cost in exchange for permission to adjust it briefly during peak demand.

Do not turn heating or cooling off entirely when leaving for short periods. Bringing a house back from a large temperature swing can use as much energy as maintaining a moderate setback, and in cold climates letting a house get too cold risks frozen pipes.

Change or clean filters on forced-air systems regularly. A blocked filter makes the system work harder for the same result, and it is among the cheapest maintenance available.

Have heating and cooling equipment serviced. Efficiency degrades gradually and invisibly, and a system running poorly can consume substantially more for the same output without ever failing outright.

Ceiling fans make people feel cooler; they do not cool rooms. Running one in an empty room wastes energy, but using one with a higher air conditioning setting is genuinely efficient because you feel comfortable at a warmer temperature.

Water heating is the next largest component. Lowering the water heater's set temperature, insulating the tank and the first few feet of pipe, and fixing hot water leaks all produce real savings. A dripping hot tap wastes the water and the energy used to heat it.

A home that leaks air cannot hold the temperature you are paying to create. Sealing leaks is typically cheap, often something a competent occupant can do, and frequently produces the largest single improvement available.

The leaks that matter are not the ones you feel. Attic hatches, recessed light fittings, plumbing and wiring penetrations, rim joists and ductwork running through unconditioned space usually lose far more than the draught under a front door.

Ductwork is a particular offender. Ducts running through an attic or crawl space with leaking joints are delivering heated or cooled air into a space you do not occupy, and sealing them is high-return work.

Insulation matters most where it is thinnest relative to what is above it, which for most homes is the attic. Recommended levels vary by climate zone, and adding to inadequate attic insulation is usually the best-value insulation investment.

Windows are where people want to spend money and where the return is weakest. Full window replacement is expensive and pays back slowly on energy grounds alone. Sealing around existing frames, adding weatherstripping, and using window coverings — closed against summer sun, opened to winter sun on south-facing windows — capture much of the benefit at a fraction of the cost.

Get a home energy assessment before spending significantly. Many utilities provide one free or cheaply, and professional assessments use tools such as blower door tests and thermal imaging that identify losses no visual inspection would find. Spending on the wrong improvement is the most common way to waste an efficiency budget.

Renters are not powerless. Weatherstripping, draught excluders, window film, thermal curtains, water-saving showerheads and LED bulbs are all reversible, inexpensive, and portable to the next home.

Lighting is now a small share of most bills because LED lighting is dramatically more efficient than what it replaced. If any incandescent or halogen bulbs remain in fittings used daily, replacing them is still worthwhile — but the era of lighting being a major target has largely passed.

When appliances need replacing, efficiency labelling is the practical guide. ENERGY STAR is a government-backed certification programme that identifies products meeting defined efficiency criteria, and the yellow energy guide labels on appliances allow direct comparison of estimated annual running costs.

Replacing a working appliance purely for efficiency rarely pays back. The exception is genuinely old equipment — particularly a second refrigerator or freezer running in a garage, which is a common and expensive invisible cost.

Laundry is where habits matter more than the machine. Washing in cold water avoids the water heating that dominates a wash cycle's energy use, and full loads use less energy per item. Drying is energy-intensive, so cleaning the lint filter, avoiding over-drying and air drying where practical all help.

Dishwashers are generally more efficient than washing by hand, particularly when run full and with the heated drying cycle turned off.

Understand how your utility bills you, because it changes what saving means. Some utilities charge a flat rate per unit; others use tiered rates that rise as consumption increases, or time-of-use rates that charge much more during peak hours. Under time-of-use pricing, shifting laundry, dishwashing and vehicle charging to off-peak hours reduces the bill without reducing consumption at all.

Some utilities also apply demand charges based on your highest peak, in which case avoiding running several heavy appliances simultaneously matters more than total usage.

Read the bill itself. Utility bills frequently include usage comparisons against previous periods and similar homes, which is the cheapest diagnostic available and is routinely ignored.

The Low Income Home Energy Assistance Program provides federal funding, administered by states and local agencies, to help low-income households with heating and cooling bills. It can also assist in a crisis such as a disconnection notice or a broken heating system.

Eligibility and benefit levels are set locally within federal guidelines, funding is limited, and in many areas applications open on specific dates and close when funds run out. Applying early in the season matters more than in most benefit systems.

The Weatherization Assistance Program is separate and more valuable long-term. It funds permanent efficiency improvements — insulation, air sealing, heating system repair or replacement — at no cost to eligible households, which reduces bills permanently rather than paying one of them.

Utilities run their own programmes, and these are the most commonly missed. Free or subsidised home energy assessments, rebates on efficient appliances and thermostats, discounted or free LED bulbs, budget billing that levels payments across the year, and payment plans for arrears are all widely available and rarely advertised prominently.

If you are struggling to pay, contact the utility before disconnection rather than after. Utilities generally have hardship programmes, payment arrangements and arrears forgiveness schemes, and reconnection fees plus deposits make disconnection far more expensive than the arrears that caused it.

Many states have rules restricting disconnection during extreme weather or for households with certain medical needs, and some require notice periods before disconnection. These protections vary by state and are worth knowing before you need them.

Federal tax credits for residential energy efficiency and clean energy improvements have existed in various forms, and state and utility incentives sit alongside them. Because these change with legislation, check what is currently available before assuming a credit applies.

Be careful with door-to-door energy sales. In states with retail energy choice, aggressive marketing of supply contracts is common, and introductory rates that expire into much higher variable rates are a recurring complaint. Never agree to switch supplier at the door, and check any offer against your current rate on your own bill.

A sharp unexplained increase usually has one of a small number of causes, and working through them in order is faster than guessing.

Check first whether the bill is estimated rather than actual. Utilities estimate readings when a meter cannot be accessed, and an underestimated period is followed by a correction that looks like a spike but is simply the catch-up. Bills normally indicate whether a reading was actual or estimated, and submitting your own reading can resolve it.

Compare the billing period rather than the calendar month. Periods vary in length, and a bill covering thirty-five days against a previous one covering twenty-eight will be higher for no other reason. Check the degree-day or weather comparison many utilities print, since an unusually cold or hot period explains most seasonal jumps.

Confirm the rate has not changed. Introductory supply contracts expiring into variable rates, a shift onto a different tariff, or a rate increase can all raise a bill with no change in consumption at all.

If none of those explain it, look for equipment failing rather than equipment running. A water heater with a failed element or a leaking tank, a heat pump stuck on emergency resistance heating, a refrigerator or freezer with failing seals, an air conditioner low on refrigerant, or a well pump cycling because of a running toilet will all consume heavily while appearing to work normally. Emergency or auxiliary heat running continuously is a particularly expensive and common failure.

A new appliance or habit is worth ruling out too — a second freezer, an electric vehicle charging at home, a space heater used through a cold snap, or someone new in the household can each move a bill substantially.

Smart meters, where installed, usually give access to hourly or daily usage data through the utility's website. That data identifies whether consumption is continuous or spiking at particular times, which distinguishes a failing always-on appliance from a behavioural change quickly.

If you believe the bill is simply wrong, ask the utility to verify the meter reading and, if necessary, test the meter. Utilities have processes for this, and state utility commissions handle complaints when a dispute is not resolved. Keep paying the undisputed portion while a dispute is open, because a disputed bill left unpaid can still lead to disconnection.