Going zero waste can save you money, but only if you focus on using less and wasting less rather than buying new eco products. The biggest saving for most UK households is food: WRAP estimates that a family of four throws away around £1,000 of food a year that could have been eaten.
This guide covers the swaps that pay for themselves, the ones that cost more upfront but save over time, and the ones to skip if your aim is to save money. You do not need to be perfect; cutting waste by half is a big win for your budget.
Start with what you already have
The most common zero waste mistake is a shopping trip: glass jars, bamboo everything, matching storage tins. Replacing working items with greener versions costs money and creates waste of its own. The cheapest and greenest option is almost always to use up what you own first.
Keep using plastic containers until they break, finish the cleaning products under the sink, and wash out jars from things you already buy to use for storage. Only replace an item when it runs out or wears out, and then choose the reusable or refillable option.
Food waste: the biggest saving
WRAP, the UK charity that tracks household waste, puts the cost of avoidable food waste at about £1,000 a year for a family of four, based on its 2021 data. Bread, milk, potatoes, salad and leftovers are among the most commonly binned items.
Small habits make most of the difference. Our guide to reducing food waste goes deeper, and meal planning is the habit that ties it together.
- Check the fridge and cupboards before you write a shopping list
- Plan meals that share ingredients so half-used packs get finished
- Learn the difference between use by (safety) and best before (quality) dates
- Freeze bread, milk, cheese, leftovers and ripe bananas before they turn
- Buy loose fruit and veg so you get the quantity you need
- Use apps like Too Good To Go and Olio for cheap or free surplus food
Swaps that save money: a quick comparison
Some swaps save from day one, others cost more upfront and pay back over months. Prices vary by shop, so use this as a guide to where savings come from rather than exact figures.
| Swap | Upfront cost | Why it saves |
|---|---|---|
| Tap water in a reusable bottle | Low | Replaces bottled water and drinks bought on the go |
| Reusable coffee cup | Low | Some cafes offer a discount for bringing your own |
| Cloths instead of kitchen roll | Low | Old T-shirts and towels cost nothing |
| Batch cooking and packed lunches | Low | Replaces meal deals and takeaways |
| Menstrual cup or period pants | Medium | Lasts for years instead of monthly purchases |
| Reusable nappies | High | Saves over time, more if used for a second child |
| Safety razor | Medium | Blades are far cheaper than cartridges |
See our guide to saving on period products for more on reusables. Some councils also run real nappy schemes with trial kits or vouchers, so check your council website before buying.
Cleaning and toiletries without the markup
A cupboard of specialist cleaners can be replaced by a few basics. White vinegar diluted with water handles glass and limescale, bicarbonate of soda works as a gentle scrub, and washing-up liquid in warm water covers most surfaces. Do not mix vinegar or other acids with bleach, as this releases harmful gas.
For toiletries, bar soap and shampoo bars avoid plastic bottles and tend to last a long time if kept dry. Refill shops and some supermarkets now offer refills of washing-up liquid, laundry liquid and staples like pasta and rice. Compare the price per kilo or litre with the supermarket before assuming refills are cheaper, as they are not always.
Buy second-hand, borrow and repair
The cheapest new thing is the one you do not buy. Before buying anything new, check charity shops, Facebook Marketplace, Vinted, eBay and Freecycle-style groups. Our guide to buying second-hand covers where to look for different items.
For things you need occasionally, such as a drill, carpet cleaner or camping gear, borrow from friends, a library of things or neighbourhood groups. When something breaks, try a repair first: many towns have repair cafes run by volunteers, and online guides cover common fixes for clothes, bikes and small appliances.
Shopping habits that cut waste and spending
Carry a reusable bag: large shops in England charge 10p for single-use carrier bags, and the charge is similar elsewhere in the UK. Shop with a list, avoid multibuy offers on perishables you will not finish, and choose loose produce where it is no more expensive per kilo.
A short No-Spend Challenge is a useful zero waste exercise too: by buying nothing new for a week or a month, you work through what is already in your cupboards and notice how much you have.
Put the savings somewhere useful
Money you stop spending on waste only helps if it goes somewhere. Work out roughly what you are saving each week, perhaps £10 from less food waste and £5 from fewer bottles and coffees, and move it to savings on payday. The savings goal calculator shows what a small weekly amount adds up to.
If you like seeing progress, the SYM app tells you how much to put aside each day and logs it with one tap, which pairs well with a low-waste habit. Keep the pot in an easy-access account; our savings accounts guide explains how to compare.
Frequently asked questions
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