Your home's utilities, as one system
Each bill tells part of the story. Together they show what running your home really costs — and where a change will make the biggest difference. Don't have a bill handy? Estimate it with our electricity, natural gas and water calculators.
Getting the most accurate picture
- Use the total amount due on each bill, including fixed charges and taxes.
- Enter at least one winter and one summer month — seasons change bills a lot.
- If a bill covers more or fewer days than a month, it's still fine to use; the average evens it out.
A worked example
Say you have three bills from different seasons. Add each month's electricity, gas and water, then average the totals:
| Month | Electricity | Gas | Water | Total |
|---|---|---|---|---|
| January | $160 | $140 | $70 | $370 |
| April | $120 | $60 | $72 | $252 |
| July | $210 | $30 | $95 | $335 |
The average month is $319, so the yearly projection is $319 × 12 = $3,828. Notice how gas leads in January and electricity in July: with only the January bill, the estimate would have been $4,440 a year, and with only July, $4,020. That's why bills from more than one season matter.
Why your bills rise and fall through the year
| Bill | Usually peaks | Main drivers |
|---|---|---|
| Electricity | Summer (air conditioning), and winter in all-electric homes | Cooling, heat pumps, water heating, appliances |
| Natural gas | Winter | Furnace or boiler, gas water heater, cooking |
| Water & sewer | Summer | Lawn and garden watering, showers, laundry |
| Propane / heating oil | Winter (delivered in batches) | Space and water heating |
In most U.S. homes, heating and cooling are the largest part of the energy bill, followed by water heating. That's where changes pay off first — a programmable thermostat, sealing drafts, or a more efficient water heater usually beat unplugging small electronics.
See where it goes, room by room
A bill shows the total, not the parts. To see how heating, cooling, appliances and lighting add up, walk through one of our interactive 3D homes — from a compact apartment to a cold-climate house with gas heat — and switch appliances on and off to watch the monthly bill change. For the method behind every number, see How We Calculate.
Frequently asked questions
What counts as a home utility?
Electricity, natural gas, water and sewer are the core utilities. Many households also pay for trash collection, propane or heating oil. Internet and phone are usually budgeted separately.
How do I estimate my yearly utility costs?
Enter as many months of bills as you have. The calculator averages them and fills in missing months with that average. Bills from both a summer and a winter month give a much better yearly estimate than one month alone.
Why do my utility bills change so much between months?
Heating and cooling drive most of the swing: gas or electric heat in winter, air conditioning in summer. Water use often rises in summer with outdoor watering.
How can I lower my total utility bill?
Start with the biggest category. Our individual calculators show where the energy goes — heating and cooling, water heating, appliances, lighting — and what changes are worth making.
Should I budget for the average month or the most expensive one?
Budget for the average, but keep a cushion for your peak season. Many utilities also offer budget billing, which spreads your yearly total into equal monthly payments so winter and summer peaks don't hit all at once.
Are fixed charges included in this calculator?
Yes, as long as you enter the total amount due. Fixed customer charges, delivery fees and taxes are part of what you pay, so they belong in the total even though they don't change with how much you use.
More calculators
- Electricity Cost Calculator
What any device costs to run, from its wattage and hours of use.
- Air Conditioner Running Cost
Daily and monthly cooling costs, including how often the compressor runs.
- Gaming PC Electricity Cost
Gaming, idle and sleep power, plus monitors and peripherals.
- Space Heater Running Cost
Heater wattage, hours and thermostat cycling.
- Refrigerator Electricity Cost
From the EnergyGuide label's kWh per year or a measured reading.
- Smart Plug Energy Cost
Turn kWh or watt readings from an energy-monitoring smart plug into real costs.
- Natural Gas Cost
Your gas bill from therms, CCF or meter readings, with price per therm and fixed charges.
- Water Bill & Hot Water
Water and sewer bills in gallons or CCF, tiered rates, plus what hot showers cost to heat.
- Home Heating Cost
Electric heat vs. gas furnace vs. heat pump, with your prices and equipment efficiency.
- Home Lighting Cost
Every bulb in the house, plus LED vs. CFL vs. incandescent and the savings from switching.
- Laundry Cost
Washer and dryer as one load: electricity, water, sewer and gas.