TL;DR

FIFO — First In, First Out — is the stock rotation method every food handler must know. It means the food that arrived first is used first. You arrange items so the earliest use-by or expiration dates sit in front or on top, so older stock gets used before it expires. FIFO depends on date marking: every item needs a clear date for rotation, and ready-to-eat TCS food prepared on-site can be kept for up to seven days at 41°F (5°C) or below, counting the preparation day as Day 1. For your food handler exam, know what FIFO stands for, how to arrange stock, and the seven-day date-marking rule.

What FIFO means

FIFO stands for First In, First Out. It is a simple system for storing and rotating food: the items that came into storage first are the items used first. When you place a new delivery behind or beneath the stock already on the shelf, you guarantee that the older product gets reached for before the newer product. The food that has been in storage longest is always the next food out.

FIFO is not limited to one part of the kitchen. It applies in dry storage, in the cooler, and in the freezer. Canned goods, bagged rice, refrigerated dairy, frozen meat, and food you prepared yourself all get rotated the same way — oldest first.

Why FIFO matters for food safety

There are two reasons FIFO is a required practice, and the exam expects you to know the first one especially well.

The most important reason is safety. FIFO reduces the risk of using or serving food that is past its use-by date. This matters most for time-temperature control for safety food, known as TCS food — items like dairy, cooked rice, sliced melon, and prepared salads that support the rapid growth of bacteria. Refrigeration does not stop bacteria from multiplying; it only slows them down. So a TCS item left too long, even in a cold cooler, can become unsafe. By always reaching for the oldest stock first, FIFO keeps food from sitting forgotten at the back of a shelf until it is no longer safe to serve. To understand why time and temperature control is so central, see our guide to the temperature danger zone.

The second reason is waste. When older food is used before it expires, less food has to be thrown away. Less spoilage means lower costs and a more organized storeroom. Safety comes first, but reduced waste is a real benefit of doing FIFO well.

How to arrange stock the FIFO way

Putting FIFO into practice comes down to three habits. First, date mark food as it comes in or as it is prepared. Second, arrange storage so the items with the earliest use-by or expiration dates are in front or on top, where they will be picked up first. Third, maintain the order every time a new delivery arrives — shift the older stock forward and place the newer stock behind it.

That third step is the one most often skipped. When a delivery arrives, it is tempting to set the new boxes wherever there is space, which often means right at the front. Done that way, the new stock gets used while the old stock is buried and forgotten. Proper FIFO means taking the extra minute to move the existing stock forward first. Receiving and inspecting deliveries correctly sets FIFO up to succeed; see our guide to receiving and inspecting food deliveries.

Date marking: the foundation of FIFO

FIFO cannot work without dates, because the system organizes food by use-by date. Every item in dry storage, the cooler, and the freezer should carry or be associated with a clear date for rotation. Many packaged products already show a manufacturer use-by or expiration date. If a packaged item does not show one, the food handler marks it with the date it was received and uses that date as the storage reference.

Food prepared or opened on-site needs its own date mark. Ready-to-eat TCS food that is prepared in-house or taken out of its original packaging can be stored for a maximum of seven days, as long as it is held at 41°F (5°C) or colder. The day the food is prepared or opened counts as Day 1. So food prepared on a Monday must be used, sold, or thrown out by the following Sunday. When a dish combines several prepared ingredients, it is marked with the earliest use-by date among those ingredients — the whole dish is only as fresh as its oldest component.

FIFO and the FDA Food Code

FIFO and date marking are not just good habits; they reflect what regulators expect. The FDA Food Code, the model code most state and local food safety rules are based on, addresses date marking of ready-to-eat TCS food and the disposition of food that is no longer safe. The seven-day limit and the requirement to date mark on-site prepared food come from that framework. For a food handler, the practical takeaway is simple: a properly date-marked, properly rotated storeroom is also a compliant one. Storing food correctly is one part of the larger subject of safe storage, covered in our guide to proper food storage methods.

Common misconceptions

  1. "FIFO means First In, Fast Out." Wrong. FIFO stands for First In, First Out — the food that arrived first is used first, regardless of how fast the kitchen is moving.
  2. "New deliveries go in front because they are freshest." Wrong. New stock goes behind or beneath the older stock. The oldest items belong in front so they are used first.
  3. "FIFO is only for refrigerated food." Wrong. FIFO applies to dry storage and the freezer too, not just the cooler. All stored food is rotated oldest-first.
  4. "If food is in the refrigerator it cannot go bad." Wrong. Refrigeration only slows bacterial growth. A TCS item kept past its use-by date can be unsafe even in a properly cold cooler.

Frequently asked questions

What does FIFO stand for?
First In, First Out. The food that was placed in storage first is the food used first, so older stock is used before newer stock.
Where do the oldest items go on the shelf?
In front or on top, where they will be picked up first. New stock goes behind or beneath the older stock.
How long can ready-to-eat TCS food prepared on-site be stored?
Up to seven days, when held at 41°F (5°C) or colder. The day it is prepared or opened counts as Day 1.
What do you do with a packaged item that has no date on it?
Mark it with the date it was received and use that date as the storage reference for rotation.
Does FIFO apply to the freezer and dry storage?
Yes. FIFO applies to dry storage, the cooler, and the freezer. All stored food is rotated so the oldest is used first.
How do you date mark a dish made from several prepared ingredients?
Use the earliest use-by date among the ingredients. The finished dish is only as fresh as its oldest component.

Bottom Line

FIFO — First In, First Out — keeps a kitchen safe by making sure older food is used before it expires. Arrange stock with the earliest use-by dates in front, place new deliveries behind the old, and rotate every part of storage, not just the cooler. FIFO only works when food is date marked: every item carries a date, and ready-to-eat TCS food prepared on-site lasts up to seven days at 41°F (5°C) or below, counting the prep day as Day 1. Learn those points and you can answer any FIFO question with confidence. Keep building your food safety knowledge with our complete food handler exam guide.

Source: U.S. FDA Food Code (date marking and disposition of ready-to-eat foods), fda.gov/food/retail-food-protection/fda-food-code; FoodSafety.gov, Storage and food safety basics, foodsafety.gov/keep-food-safe/4-steps-to-food-safety; StateFoodSafety, Date Marking and FIFO training resource, statefoodsafety.com/Resources/Resources/stand-up-training-date-marking-and-fifo.