How to reduce food waste at home and save money

The three biggest levers are simple. Check what you already have before you shop, store food so it lasts, and cook whatever is going off first. A UK household of four throws away about £1,000 of edible food a year, according to WRAP, so small habits pay back fast. This guide covers each step, with the storage and leftover rules from the Food Standards Agency (FSA).

6.0 million tonnes of food and drink were wasted in UK homes in 2022. 73% of it (4.4 million tonnes) was edible, and WRAP puts the value of that edible food at £17 billion. Source: WRAP, Household food and drink waste in the UK 2022.

$2,913 a year is what the US Environmental Protection Agency (EPA) estimates a family of four loses to wasted food, about $56 a week. Source: EPA, Estimating the cost of food waste to American consumers, 2025.

Most of that money isn't lost to dramatic kitchen disasters. It's the half bag of spinach, the loaf that went hard, the chicken you meant to cook on Tuesday. Those are fixable, and none of the fixes need a spreadsheet.

Before you shop

Food waste usually starts in the supermarket, not the kitchen. You buy a second jar of something you already own, or a week of meals for a week in which you're out three nights.

Look first. Open the fridge, the freezer and the cupboard, and write down what's close to the end of its life. Then plan two or three meals around those things before you add anything new to the basket.

A quick habit helps here: photograph the fridge before you leave the house. Your memory of what's in there is worse than you think, and a photo takes five seconds. If you'd rather not squint at a blurry shot in the aisle, what's in my fridge shows how PantryAI turns a fridge photo into a list of what you have.

A few other shopping habits that save money:

• Buy loose fruit and veg where you can, so you take only what you'll use.
• Check the multibuy maths. Three for £5 isn't a saving if the third one goes in the bin.
• Shop with a rough idea of how many nights you'll actually cook at home.
• Keep a short list of staples you always have, so you stop rebuying them by accident.

If a household of four wastes about £1,000 of edible food a year, that's roughly £19 a week you could keep.

Store food so it lasts

Good storage buys you days. The rules are mostly about temperature and timing.

The FSA says your fridge should be set between 0 and 5°C, and suggests checking it with a fridge thermometer. Your freezer should sit at around -18°C. A fridge that's a couple of degrees too warm shortens the life of everything in it.

Some practical storage rules:

• Cool cooked meat and put it in the fridge or freezer within one to two hours, per FSA guidance.
• Store bread in the freezer if you won't finish the loaf in two or three days, and toast it from frozen.
• Freeze milk, grated cheese and cooked rice in portions you'd use in one meal.

Use-by and best before dates

These two labels mean different things, and mixing them up is a common reason people bin good food.

A use-by date is about safety. The FSA says you can eat food up to midnight on the use-by date, but not after, even if it looks and smells fine. A best before date is about quality. Food past that date is generally still safe, though it may not be at its best. Eggs are an exception: the FSA advises not to eat them after their best before date.

If you won't get to use-by food in time, freeze it. The FSA says you can freeze food right up until midnight on the use-by date. Read the full rules in the FSA's guide to understanding food labelling.

Freeze it before it turns

The freezer is the cheapest tool for cutting waste. Freeze things while they're still good, not on the last day.

Cool leftovers quickly, pack them flat in labelled bags or tubs, and write the date on them. Defrost in the fridge, ideally overnight, and use the food within 24 hours of it thawing. For the full detail, see the FSA's guide to chilling, freezing and defrosting food safely.

Cook what's going off first

You can store food well and still waste it if you cook in the wrong order. The fix is old and boring: first in, first out.

When you unpack a shop, move the older items to the front and put the new ones behind. Do the same in the freezer. It takes a minute, and it means the thing you bought last week gets seen before the thing you bought today.

Make an "eat me first" shelf

Pick one spot in the fridge, a shelf or a clear box, and put anything that needs using soon in it. Open yoghurt, half an onion, the last of the ham. Tell everyone in the house that this shelf gets raided first. A printed label on the shelf helps, because it turns a vague intention into a house rule.

If you'd rather not rely on memory, PantryAI has an Expiring soon filter that lists anything with three days or fewer left. The dates are estimated by food category and you can edit them, so treat them as a prompt and check the label on the pack.

Then make it the starting point for dinner. If the shelf holds a chicken thigh pack, some wilting peppers and a tub of cooked rice, you've nearly got tonight's meal already. An AI recipe generator can take that exact list and suggest what to cook, which is how PantryAI works when you scan your fridge.

Leftovers are an ingredient

Cooked chicken, rice, overripe bananas and stale bread each have an obvious second life. Chicken goes into wraps, pies or a quick curry. Rice can be reheated piping hot (cool it fast and keep it in the fridge first) or turned into fritters. Spotty bananas belong in banana bread or the freezer for smoothies. Stale bread becomes breadcrumbs, croutons or French toast.

We're building dedicated pages for each of these. Until they're live, search "leftover" plus the food and you'll find plenty of ideas, and Love Food Hate Waste, WRAP's consumer site, has a good recipe and tips section.

Leftovers: how long they keep

Leftovers are where good intentions and food safety meet. UK and US guidance differ, so here they are side by side.

	UK (FSA)	US (USDA FSIS)
In the fridge	Eat within 2 days	3 to 4 days
In the freezer	Freeze instead of keeping them past 2 days	3 to 4 months for best quality
Cooling	Cooked meat into the fridge or freezer within 1 to 2 hours	Refrigerate within 2 hours

Sources: FSA and USDA FSIS.

If you live in the UK, follow the 2-day rule. It's stricter than the US figure, and the difference is real, so don't mix the two. When you're unsure whether leftovers will get eaten in time, freeze them on day one rather than day two.

Cooked rice is the exception to the 2-day rule. The FSA says to chill it as quickly as possible, ideally within 1 hour, and keep it in the fridge for no more than 24 hours. Freeze it within 1 hour of cooking, and reheat it once only, until it is steaming hot all the way through. The same applies to dishes made with rice, such as fried rice. See the FSA's home food fact checker.

Track what you save

A number makes the habit visible. You don't need anything clever. Write down what you throw away for two weeks and you'll spot the pattern, whether that's salad bags, bread or the Friday takeaway that replaced a planned meal.

If you'd rather not keep a log by hand, a pantry app can do part of it for you. PantryAI logs the money and CO2e you save each time you cook from your pantry, using an I Cooked This tap at the end of a recipe. The sums behind those figures are explained on how we calculate money and CO2e saved.

Try it in PantryAI. Scan your fridge, see what needs using first, and cook something from it. PantryAI is free to start, with monthly limits on scans and recipe searches, and there's no sign-up needed. Get the app for iPhone or Android and run your first scan tonight.

Apps that help

A few apps can nudge you to use food before it turns, from pantry trackers to ones that sell surplus food cheaply. We've compared the options in our guide to the best food waste apps.

Frequently asked questions

How much food does the average home waste?

WRAP's figures show UK households wasted 6.0 million tonnes of food and drink in 2022, which works out at around 210 kg per household, or 88 kg per person, over the year. About 73% of it was edible. For a household of four, the edible part is worth around £1,000 a year.

Is food safe after its best before date?

Usually, yes. The FSA says best before dates relate to quality, so food past the date is generally still safe to eat, though it may taste or look different. Use-by dates are different: don't eat food after the use-by date, even if it seems fine. Eggs are the exception, and the FSA advises not to eat them after their best before date.

Can I freeze leftovers?

Yes, and it's the safest way to keep them longer than 2 days. Cool them quickly, freeze them promptly, and defrost them in the fridge. Once thawed, use them within 24 hours, per the FSA's guidance.

Sources

• WRAP, Household food and drink waste in the UK 2022
• EPA, Estimating the cost of food waste to American consumers (2025)
• FSA, How to chill, freeze and defrost food safely
• FSA, Home food fact checker
• FSA, Understanding food labelling
• USDA Food Safety and Inspection Service, Leftovers and food safety
• Love Food Hate Waste, practical UK tips