How to save money on groceries and waste less

Food spending creeps up through habits that are easy to break once you see them: shopping without a plan, buying what's front-of-shelf rather than best value, throwing away food you already paid for. The fixes are unglamorous and they work.

Plan first, shop second

A rough meal plan for the week — it doesn't need to be precise — lets you write a list of what you actually need. Shopping from a list means you buy less of what you don't need and fewer things that will go to waste. It also saves time in the shop and at checkout.

• Plan around what's on offer and what's in season, not only what you fancy.
• Plan for leftovers: cooking once for two meals is one of the most efficient things you can do with your time and ingredients.
• Write the list before you go — not in the shop aisle where everything looks appealing.
• Add regularly used staples to the list as you run low, not in a panic when you've just run out.

Shop your kitchen first

Before each shop, check what you actually have: the fridge, the freezer, the back of the cupboard. This takes two minutes and often reveals food that needs using up, duplicates you've forgotten about, or half-used ingredients that can anchor a meal plan. If you build meals around what's already there, you buy less and waste less.

Keep the fridge reasonably organised: food that needs using soon should be at the front where you see it, not hidden behind newer items.

Cheap, nutritious staples and batch cooking

Some of the most nutritious foods are also the cheapest per meal. These are worth keeping stocked:

• Dried or tinned legumes — lentils, chickpeas, kidney beans, black beans. Cheap per portion, high in protein and fibre, and they work in soups, stews, curries and salads.
• Oats — inexpensive, filling and versatile for breakfast, baked goods and smoothies.
• Rice, pasta and noodles — bulk staples that store well and stretch any meal.
• Eggs — one of the cheapest sources of complete protein; fast to cook and work at any meal.
• Frozen vegetables — picked and frozen at peak ripeness, often cheaper than fresh equivalents, and no risk of them wilting in the fridge before you use them.
• Tinned tomatoes, stock and coconut milk — shelf-stable base ingredients for dozens of quick meals.

Batch cooking one or two meals a week — a big pot of soup, a tray of roasted vegetables, a large batch of grains — cuts the cost per portion and the number of times you're tempted by expensive convenience food at the end of a tiring day.

Unit prices, own-brands and seasonal produce

The shelf price tells you what something costs; the unit price tells you what it costs per 100g, per litre or per item. Supermarkets are required to display unit prices in many countries, and comparing them is the fastest way to see through packaging tricks and promotions.

• A "family size" pack is not always cheaper per gram than a standard one — check.
• Own-brand staples are usually produced to the same safety standards as name brands. Try one category at a time; if it's fine, switch.
• Seasonal produce is typically cheaper and better quality than out-of-season alternatives. A rough guide: most root vegetables in autumn and winter, salad leaves and courgettes in summer, apples and pears in autumn.
• Frozen fruit and vegetables are a reliable, affordable alternative when fresh is expensive or not at its best.

Wasting less is saving money

Everything you throw away is money you already spent. Households that regularly bin food — soft vegetables, forgotten leftovers, bread that goes mouldy — are, in effect, overpaying for every meal they do eat. See our full guide to reducing food waste for practical storage and use-it-up tips. The short version:

• Store food correctly — most vegetables last longer in the fridge; potatoes, onions and garlic keep better in a cool, dark cupboard.
• Move anything near its use-by date to the front, and plan a meal around it.
• Freeze leftovers and surplus rather than letting them spoil — bread, cooked rice, soups and stews all freeze well.
• Understand date labels: "use by" is a safety date; "best before" is a quality guide. Many foods are fine past their best-before date if they look and smell normal.

Traps to avoid in the shop

• Shopping hungry — reliably leads to impulse buys and spending more than planned. Eat something small first.
• Multi-buy deals on perishables — "3 for the price of 2" on things that will spoil before you use them is not a saving. Only take multi-buy deals on items with a long shelf life that you'll definitely use.
• Eye-level and end-of-aisle placement — the most prominently displayed products are rarely the best value. Supermarkets place higher-margin products at eye level and on special displays. Look up, look down and look at the unit price.
• Unnecessary convenience — pre-cut, pre-washed and pre-seasoned products cost significantly more for very little time saved. Whole vegetables and unprocessed ingredients are almost always cheaper.
• Impulse items near the checkout — small purchases here add up significantly over a year. Stick to your list.

Loyalty schemes, markdowns and growing a few herbs

Loyalty schemes vary in value, but if you already shop at a particular supermarket regularly, signing up costs nothing and the accumulated discounts or points add up over time. Use them for what you'd buy anyway; don't let them guide you to buy things you don't need.

Reduced shelves (marked-down food near its date) are one of the genuinely reliable ways to buy good food at a significant discount. Many shops mark down perishables at a predictable time each day. The food is perfectly good — it just needs using promptly or freezing.

Growing a few herbs — even on a windowsill — is one of the smallest possible gardening efforts with a disproportionate impact on cooking. Fresh herbs are expensive per packet in supermarkets. A small pot of basil, parsley, chives or mint costs little, regrows with use, and improves meals consistently.

A money-saving shop routine

1. Check the kitchen. Open the fridge, freezer and main cupboards. Note what needs using up and what you're out of.
2. Plan 4–5 meals. Build some around what's already there. Check what's in season or on offer.
3. Write a list. Organised by section of the shop if that helps — produce, dairy, dry goods, frozen. Stick to it.
4. Eat before you go. Even a small snack helps you stay on list.
5. Check unit prices when comparing products, not just shelf price.
6. Scan the reduced shelf on your way past. If something fits a planned meal, take it.
7. At home, store correctly. Move older items forward, put anything near its date where you'll see it first.

Your grocery savings checklist

• Make a rough meal plan and a list before every shop.
• Check the fridge and freezer before buying anything new.
• Try own-brand versions of two staples this week.
• Compare unit prices, not just shelf prices, on your next shop.
• Move anything near its date to the front of the fridge.
• Freeze surplus food rather than letting it spoil.
• Avoid shopping hungry.
• Check the reduced shelf on your next visit.