How Much Food Is Your Household Actually Wasting? (Do the Math)
The average family of four wastes $2,913 or about £1,000 of food a year. Here's a one-week method to find your own number — and where the money actually goes.
Ask someone how much food they throw away and they’ll say “not much, really.” Almost everyone says this. Then they run a bin diary for a week and find a number they don’t believe.
The gap between what people think they waste and what they actually waste is the single most consistent finding in food waste research. WRAP has run this comparison repeatedly in the UK: self-reported waste and measured waste don’t match, and self-reports are always the lower number.
There are good reasons for the blind spot. Food leaves your house in small, forgettable increments — half a bag of leaves, four slices of bread, the last third of a yoghurt pot, a portion of rice scraped off a plate. None of those feels like an event. Added up across a year, they’re one of the largest controllable line items in a household budget.
This article gives you the benchmark numbers, then a method for finding your own.
The benchmark: what households actually waste
In the United States, the Environmental Protection Agency published a cost estimate in April 2025 putting the figure at $2,913 a year for a family of four — about $728 per person, roughly $56 a week, and around 11% of a typical food budget. That’s a substantial upward revision from the widely-quoted older figure of about $1,500, which was based on 2010 prices.
A separate MITRE-Gallup survey of over 9,000 US households found people were throwing out 6.2 cups of edible food per week on average.
In the United Kingdom, WRAP’s figure is that a household of four spends around £1,000 a year on good food that ends up in the bin. Nationally, UK households bin roughly 4.4 million tonnes of edible food annually, worth about £17 billion — and around 60% of all UK food waste happens in the home rather than in shops, restaurants or farms.
Some context that’s easy to miss: this is getting slightly better, not worse. ReFED’s 2026 US report found total surplus food fell 2.2% in 2024, with residential waste dropping by about 950,000 tonnes — the first decline since the pandemic, and one they attribute directly to households managing food more carefully as prices rose. High food prices have made people better at this. US grocery prices are up roughly 29% since February 2020; UK food prices rose about 30.5% between April 2022 and mid-2026.
Which explains the motivation gap. When MITRE and Gallup asked Americans why they’d want to reduce food waste, 82% said saving money mattered “a fair amount or a great deal.” Only 40% said the same about environmental reasons. This is a wallet issue that happens to also be an environmental one.
Finding your own number: the one-week bin diary
National averages tell you the scale of the problem. They don’t tell you where your money is going, and that’s the part you can act on.
The method takes about thirty seconds a day for seven days.
What you need: a notes app, or a sheet of paper stuck to the fridge.
The rule: every time edible food leaves your house without being eaten, write down what it was and roughly how much. That includes food scraped off plates, food that went off, food you got bored of, and food you threw out during a fridge clear-out.
What doesn’t count: genuinely inedible parts. Bones, peel, eggshells, coffee grounds, tea bags, the ends of onions. You’re measuring food that could have been eaten.
Be honest about the awkward ones. The half-portion your child left. The pan of rice from Tuesday. The takeaway container. These feel like they don’t count and they’re often a third of the total.
Seven days. No changes to your behaviour — the diary is a measurement, and if you improve your habits during the measurement you’ll get a flattering number and learn nothing.
Turning the diary into a figure
At the end of the week, go down the list and put a rough price against each item. You don’t need precision — the last quarter of a bag of salad is about 50p or 60 cents; three slices of bread is maybe 20 cents; a portion of leftover curry is whatever a portion of that meal cost you.
Add it up. Multiply by 52.
That’s your annual number. Most people land somewhere between the national average and double it, and most people are surprised.
Then do the second calculation, which is the one that actually changes behaviour: look at what appears on the list more than once.
The pattern is always narrower than you think
Here’s the useful finding: in nearly every household, two or three specific items account for most of the waste.
It’s rarely spread evenly across everything you buy. It’s the bagged salad, every single week. The second half of the loaf. The bunch of coriander bought for one tablespoon. Milk, if you’re a household of one or two buying two-litre bottles.
The UK national data reflects this concentration. WRAP’s figures for the most-wasted foods by weight:
| Food | Wasted per year (UK) |
|---|---|
| Bread | ~900,000 tonnes |
| Potatoes | ~750,000 tonnes — about 46% of all potatoes bought |
| Milk | ~490,000 tonnes |
| Bananas | ~190,000 tonnes |
| Salad and leafy veg | ~170,000 tonnes |
Forty-six percent of the potatoes bought in Britain are thrown away. And one loaf in three is binned because of its best-before date — a date that, on bread, has nothing to do with safety.
This concentration is good news, because it means the fix is small and specific. You don’t need to overhaul how your household eats. You need to make two or three permanent changes to two or three products.
Why food actually gets thrown away
WRAP’s food waste diary studies asked people to record why, and the breakdown is more useful than the totals:
- Too much cooked or served — 25%. The largest single cause, and the one people least expect. This is portion size, not spoilage.
- Looked or smelled off — 22%. Actual spoilage.
- Personal preference — 22%. Someone just didn’t want to eat it.
- Past the date label — 17%. Much of which, as covered above, was still perfectly good food.
Notice that only about a fifth is genuine spoilage. The rest is over-provisioning, changed minds, and date confusion — all of which are planning problems, not storage problems.
The fix for each
Too much cooked or served (25%). Cook less and offer seconds. Food left in the pan can be tomorrow’s lunch; food scraped off a plate can’t be anything. If you regularly have leftovers nobody eats, you’re cooking for a household size you don’t have. Weigh your rice and pasta once, just to calibrate — most people are eyeballing significantly over.
Spoiled food (22%). This is where storage matters. Check your fridge is at or below 5°C / 40°F, which a surprising number aren’t. Keep milk and eggs on a shelf rather than in the door. Keep an “eat me first” box at eye level. Freeze things on the day you buy them, not on the day they’re about to turn — the intention to freeze something later is where most of it fails.
Personal preference (22%). Buy fewer speculative ingredients. If you bought something because it looked interesting and you have no plan for it, decide within two days or freeze it. Agree with your household who’s responsible for a given perishable — shared kitchens leak badly here because unclaimed food is nobody’s problem.
Date labels (17%). Learn the difference. In the UK, “use by” is a genuine safety limit and “best before” is a quality guess; in the US, essentially every date except on infant formula is a quality guess. Most date-driven waste is people binning quality-dated food that was fine. Full breakdown here.
What a realistic improvement is worth
Don’t aim for zero. Zero waste isn’t achievable in a household that cooks real food, and aiming for it is how people give up in week three.
A realistic target is cutting your measured waste by half, and it’s achievable within about a month, because the changes are concentrated:
- Stop buying the two items that dominate your diary, or buy them in a form that survives — frozen instead of fresh, a pot of herbs instead of a bagged bunch, a smaller loaf.
- Freeze half the bread on shopping day.
- Serve less, offer seconds.
- Ten minutes with the fridge before each shop, so you buy against what you actually have.
For a US family of four, halving the EPA’s figure is around $1,450 a year. For a UK household of four, around £500. That’s not a rounding error — it’s a holiday, or several months of energy bills, recovered from changes that take a few minutes a week.
And unlike most savings, this one doesn’t require buying anything cheaper or eating anything worse. You’re just eating what you already paid for.
Keep measuring, lightly
The one-week diary is a diagnostic. The behaviour change comes from continuing to notice.
You don’t need to keep a written log forever — that’s the kind of task that lasts nine days. But some ongoing awareness matters, because waste creeps back up quietly once you stop looking.
The lightweight version: repeat the one-week diary once a quarter. That’s enough to catch drift and to see whether the changes you made are holding.
The automated version is what Korgo does — when you mark something as binned rather than eaten, it logs the item and the cost, and shows you the running total and the repeat offenders over time. Same principle as the paper diary, without the part where you have to remember to write it down.
Either way, the mechanism is the same: you can’t manage a number you never look at.
The short version
The average family of four is throwing away $2,913 a year in the US or around £1,000 in the UK — and self-estimates are always far too low.
Run a one-week bin diary, price it, multiply by 52. Then find the two or three items that account for most of it, and change those specifically. Only about a fifth of household waste is actual spoilage; the rest is over-serving, changed minds, and misread date labels — all fixable with planning rather than better tupperware.
Halving it is realistic. That’s about $1,450 or £500 a year, for maybe ten minutes a week.
Sources: EPA, Estimating the Cost of Food Waste to American Consumers (2025) · WRAP UK household food waste data · MITRE-Gallup State of Food Waste in America (2023) · ReFED Progress on the Plate (2026) · USDA ERS Food Price Outlook