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How to cut your grocery bill by twenty percent

Four weeks, a price book of fifteen staples, and a waste log. Most of the cut is food you were throwing out, plus five items cheaper at a second store.

Hristo Stefanov · Wildwood, New Jersey · Sep 23, 2026 · 2 min · Money

Lemons, kale, eggs, and milk beside a paper grocery bag on a kitchen counter

Start from last month, not a fantasy budget

Pull four weeks of grocery spending from your bank or receipts. Include the corner-store runs. If the total is $560, twenty percent is $112 — about $28 a week. That is the target. Do not aim for half. Half is how people quit in week two.

Write the number on a note you will see when you shop. The method below is built to hit that cut without a coupon hobby.

Week one: a price book and a waste log

Pick fifteen staples you buy every month: milk, eggs, rice, oats, chicken, beans, oil, coffee, bread, bananas, and whatever else is always in the cart. Record the price per unit, not the package price. A “deal” on a huge box is not a deal if the unit price is worse.

The same week, write down everything you throw away. Most households that try this find the waste — spoiled greens, duplicate snacks, bread that went hard — is close to the whole twenty percent. Cutting waste is free. It does not require a second store.

Week two: a default list

Build a list of about twenty-five items you actually finish. Shop from that list first. Anything off-list waits until the next trip unless you are out of a staple. This is the rule that stops the “I was just looking” aisle.

Swap one expensive repeat for a cheaper one you will still eat. Ground turkey or beans instead of the pricey cut, store-brand oats instead of single-serve cups, frozen vegetables if the fresh ones die in the drawer. Keep the swap only if you finish it.

Weeks three and four: the two-store rule

Choose one primary store and one backup. From the price book, mark the five staples that are clearly cheaper at the backup. Buy those there, or on the way home, and do the rest of the cart at the primary store. Two full shops a week erase the savings in time and extra snacks.

At the end of week four, total the groceries again the same way you did at the start. If you are near twenty percent, keep the default list and the five-item split. If you are short, the waste log is usually still the leak — not the brand of coffee.

How do I cut my grocery bill by 20 percent?

Write a price book of staples and a waste log. Most of the cut is food you were throwing out, not a new coupon app.

Open the tool: Grocery bill calculator

Sunday money note

One guide a week. Saved in this browser only — it is not sent to a list yet.

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