Ask somebody how much does it cost to run a house and you get the mortgage. Sometimes the mortgage and a guess at the power bill.

Both are real numbers. Neither is the answer. The first is the price of having the house at all, and the second is roughly a third of one line on a considerably longer list.

The Bureau of Labor Statistics puts US housing spending at $26,266 a year, $2,189 a month, and the utilities, fuels and public services inside that at $4,736 a year, which is $394.67 a month. Both checked on the BLS site on 22 September 2026.

None of it counts the roof.

How much does it cost to run a house, on the published numbers

Start with the national figures, because they are worth knowing and worth knowing the shape of.

The BLS Consumer Expenditure Survey is the one everybody quotes without naming. Its 2024 results, released in December 2025 and read on 22 September 2026, put average total spending at $78,535 a year, of which housing takes $26,266. That is 33.4 cents in every dollar, the largest share of anything a household buys.

Read the middle three rows together. Roughly $9,000 a year lands outside shelter, and utilities are not even half of it.

The single number people actually reach for is the electricity bill. The US Energy Information Administration puts that at $144 a month for the average residential customer in 2024, on 865 kilowatt hours at 16.5 cents a unit, checked on the EIA site on 22 September 2026. Hawaii averaged $213 a month and Utah $89, which is most of what you need to know about national averages.

The bill you quote from memory is about a third of one line of five.

One more caution on those figures. The BLS consumer unit averages 2.4 people and 65 per cent of them own their home. If there are five of you in a draughty house with two showers running every morning, the average is describing somebody else.

The half that bills you, and the half that does not

Everything a house costs arrives in one of three ways, and your mental figure is built almost entirely from the first.

It bills monthly. Power, gas, water, internet, phone, the alarm monitoring. Twelve sightings a year, every one of them while you are paying attention. This part of your estimate is usually good.

It bills yearly. Home insurance, property tax, the boiler or furnace service, the chimney sweep, the gutters, pest control. Large, infrequent, and almost never divided by twelve by the person doing the sums in their head.

It never bills at all. The roof getting a year older. The water heater using up one of its twelve. Nothing arrives, nothing is due, and the money is being spent anyway.

The second group is where the arithmetic goes wrong, and it goes wrong in a very specific way. A $1,620 policy paid once a year feels like a rough March and eleven ordinary months. It is $135 every single month, including the eleven in which nothing happened.

This is the one thing worth fixing before anything else, and Chirpy does the dividing for you. Add the home insurance in the Money tool as a repeating bill, set the cadence to yearly, and its monthly equivalent goes straight into the household’s fixed outgoings figure. Same for the quarterly water bill, the property tax instalment and the annual service plan. You enter each one once. After that the monthly total includes them in March and in August, which is the only version of the number that is true. Chirpy Basic is free for the whole household, up to six people, with no card.

Getting the list of those bills built in the first place is its own half-hour, and how to keep track of bills covers why it has to come from twelve months of statements rather than from last month.

The house spends money in the years nothing happens

Here is the part that no utilities calculator will ever show you, and it is the reason two identical houses on the same street cost different amounts to run.

Every major component of a house has a working life, after which it is replaced. InterNACHI publishes the chart that home inspectors use, and these are its figures, checked on 22 September 2026.

• Conventional water heater: 6 to 12 years
• Exterior paint: 7 to 10 years
• Central air conditioner: 7 to 15 years
• Dishwasher: about 9 years
• Refrigerator: 9 to 13 years
• Furnace: 15 to 25 years
• Three-tab asphalt roof: about 20 years

Look at where those cluster. Somewhere between year seven and year thirteen of living in a house, four of them come due at once, and it feels like a run of terrible luck. It is a schedule.

The useful move is to stop treating these as accidents. Take what each one would cost to replace, divide by the years it has left, and you have a monthly figure for the wearing-out. A water heater at $1,800 with six years in it is $25 a month, every month, starting now. Nobody sends you an invoice for that $25. You pay it in one lump on a Tuesday when the hot water stops.

One honest thing: the money for a roof belongs in a savings account with a standing order running into it, and Chirpy is not a bank, so it will not hold that money for you. What it can do is tell you the size of the standing order, because it is the thing holding twelve months of what this house actually cost, with the annual bills already spread across the year and the repairs filed against the house rather than lost in a card statement.

Knowing when each of those clocks runs out is a separate job from knowing what they cost, and a home maintenance checklist by season handles the timing side. The receipts matter too, because a failed appliance inside its warranty is a free replacement and outside it is a bill. Keep track of warranties and receipts goes through why the proof of purchase is the part that goes missing.

Working out your own number, from twelve months

If you want a figure today rather than in a year, there is a sitting that gets you most of the way. Half an hour, and one rule.

Open twelve months of statements. A single month contains every monthly bill and roughly a twelfth of everything else, so it produces a confident answer with the insurance, the tax and the boiler service missing entirely.

That same twelve months of statements is where the list for sinking funds for annual bills comes from, so the sitting pays for itself twice: once as a monthly figure that tells the truth, and once as the dates you need money ready for.

Read merchant names, not amounts. Scanning for big numbers makes you stop at big numbers; scanning for names makes you stop at the ones you cannot place, and the forgotten chimney sweep is hiding in there. The same habit is what makes how much does my car cost a month answerable, and for exactly the same reason.

The two figures to end up with

1. Cash out of the door, per month. Everything you actually paid last year, divided by twelve. This is the budgeting number, and it is the one that has to fit.
2. True running cost, per month. The same total with the wearing-out added. This is the number for deciding whether to stay, move, extend, or take on a bigger house.

Most people have neither, and quote the mortgage instead. The gap between the two is usually a few hundred dollars a month, and it is entirely made of things that were always going to happen.

One of you knows what the water costs

Ask the other adult in the house what the electricity costs. In most households you get a pause and then a name.

That person holds the account numbers, the provider logins, the renewal dates and the memory of what the boiler service was last time. It works perfectly until the week they are ill, away, or busy when something floods.

In Chirpy the house is a household record rather than a personal one. The Home tool takes a record per utility with the provider, the account number, what it costs and when it renews, filed under Utilities, Internet or Maintenance. The Money tool holds the spending against categories both of you can open, with a monthly limit on the ones worth watching. Six seats on the free plan, so nobody is reading over a shoulder.

• Both of you see the total. A running cost only one person can see is a running cost only one person can be annoyed by, which is how a price rise survives three years.
• The account number sits with the bill. It looks like clutter until the first time you are on hold and need it.
• The history outlives the phone. Records kept in one person’s notes app end when that phone does.

On Chirpy Pro, at $12.99 a month or $89 a year, you can photograph the plumber’s invoice and it files itself as a spend with the amount, the date and the merchant already filled in. On the free plan you type it, which takes about fifteen seconds and produces the same record.

What the number is actually for

Nobody works this out for the pleasure of knowing. There are four decisions on the other side of it, and every one of them is made badly without it.

Whether you can afford the house you are looking at. Buyers compare mortgage against rent and stop. An older house with a fifteen-year-old furnace and original windows carries a running cost that a lender never mentions and a survey only hints at.

Whether to repair or replace. A $900 repair on a nine-year-old appliance looks like the thrifty choice against $1,400 for a new one. Against the remaining life of each it usually is not, and that comparison needs a number.

Whether to shop the renewal. A premium that has climbed eleven per cent a year for three years is obvious the moment the three figures sit next to each other, and invisible in any year you only saw one.

Whether the house or the habits are the problem. This is the one that changes the argument at the kitchen table, because a household that thinks it is overspending on food is sometimes a household with a heating system quietly costing it far more than it should. If food is the one you keep coming back to, the grocery budget for family of 4 is worth reading before you cut anything, because the official figure and your supermarket receipt are not counting the same things.

Once the house’s real total is in front of you, the rest of the month tends to look different too. A household budget for couples goes through what to do with a figure that turned out bigger than the one you had been using.

Common questions