FEFO vs FIFO in your pantry: which to use and when
The difference between FIFO and FEFO, why what you bought yesterday sometimes needs to be used before what you bought last month, and how to order your pantry by expiration date.
Most people rotate their pantry the way they were taught: old stuff in front, new stuff in back. That is FIFO, "first in, first out". It works well until the day you buy a few discounted cans with a short expiration date and tuck them behind cans that have been sitting there for months.
That is where FEFO comes in: "first expired, first out". They sound the same. They are not.
The difference in one sentence
FIFO orders by when you bought it. FEFO orders by when it expires. If everything you buy has similar dates, they give the same result. If not, FEFO is the one that keeps food from going to waste.
An example. In January you buy three cans of tuna that expire in 2029. In October you buy two cans of peaches on sale that expire in April 2027. With FIFO, the tuna (older) goes in front. With FEFO, the peaches go in front, because they expire first.
When FIFO is enough
- When you always buy the same things at the same times and everything arrives with similar dates.
- With products that barely change over time, like salt or sugar.
- If checking dates feels like a chore: FIFO beats having no system at all.
When you need FEFO
- Sales and clearance. Discounted food usually has less life ahead of it.
- Mixed batches. Two bags of rice bought months apart can have almost the same date.
- Cans with different acidity. According to the USDA, canned high-acid foods (tomatoes, fruit, pickles) keep their best quality for about 12 to 18 months, and low-acid ones (meat, beans, vegetables) for 2 to 5 years. A can of tomatoes bought today may need to go before a can of tuna bought a year ago.
- Emergency kit. The things you do not touch for years are the ones that get forgotten.
What the date really says
This is a very common confusion. In the United States, the USDA explains that, except for infant formula, product dates are not a safety indicator and are not even required by federal law: they are the manufacturer's quality guide. "Best if used by" is about flavor and texture, not danger.
Every country has its own rules, and in many of them an "expiration date" on perishable products is used as a safety limit. The practical rule: for dairy, meat, eggs and infant formula, respect the date; for dry goods and cans in good condition, use it to decide the order, not as a verdict. A swollen, rusted or leaking can goes in the trash, whatever its date.
How to do it at home without overthinking it
- Order by date, not by purchase. When you put something away, place it where its expiration says it belongs: what expires first, at the front.
- Make the date visible. If the label is unreadable or the date is on the lid, write the month and year on the front with a marker.
- A "use first" shelf. One shelf or box for what expires in the next 60 days. Cook from there.
- A 10-minute monthly check. Look at what is getting close and plan the week's meals around it. For ideas, see how to rotate your pantry with FIFO.
How Despendo does it
When you save a product in Despendo you enter its expiration date, and the Rotation tab shows the list ordered by that date: it is FEFO without you having to think about it. It alerts you by email or Telegram when something is about to expire, and it recently gained an expiration calendar to see what is coming in the next months. If you already keep your inventory in a spreadsheet, you can import it with a CSV file.
To decide how much of each thing to keep, start with how much food to store per person.
Sources and further reading
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