FDA Date Marking Guide for US Restaurants (SOP & Rules)

Understanding FDA Food Code Date Marking Rules

In the fast-paced environment of a commercial kitchen, food safety regulations can sometimes feel like a collection of administrative hurdles. However, date marking is one of the most critical safeguards against foodborne illness. According to Section 3-501.17 of the FDA Food Code, restaurants must implement a strict system to track and discard perishable foods before they become hazardous.

The core rule is straightforward: any ready-to-eat (RTE), Time/Temperature Control for Safety (TCS) food prepared in-house or opened from a commercial package and held under refrigeration at 41°F (5°C) or below for more than 24 hours must be clearly marked. This food can be held for a maximum of 7 calendar days, after which it must be consumed, sold, or discarded.

Day 1 is the day the food is prepared on-site or the day the commercial package is opened. The discard date is calculated as Day 1 plus 6 days (completing the 7-day maximum window). For example, if a batch of chicken soup is prepared on Monday, October 1, the discard date must be marked as Sunday, October 7, and any remaining soup must be thrown away by midnight of that day.

Failing to properly mark dates or keeping foods past their 7-day threshold is a major focus of health inspections. This guide covers how to establish a compliant Standard Operating Procedure (SOP), calculate complex freeze-thaw timelines, identify exemptions, and train your staff to pass every health department audit.

The Public Health Reason: Controlling Listeria monocytogenes

Unlike many other common foodborne pathogens, such as *Salmonella* or *Escherichia coli*, the bacterium *Listeria monocytogenes* is uniquely dangerous because it is psychrotrophic. This means it can actively grow, multiply, and thrive at refrigerated temperatures of 41°F (5°C) or below.

While standard commercial refrigeration slows the growth of most bacteria, it merely decelerates Listeria. Over a prolonged period, Listeria can multiply to an infectious dose even on properly chilled food. Listeriosis, the infection caused by consuming contaminated food, is a severe public health threat. It carries a high rate of hospitalization (exceeding 90%) and a mortality rate of approximately 20%, particularly among highly susceptible populations such as pregnant individuals, newborns, elderly adults, and immunocompromised individuals.

The 7-day date marking limit is a scientifically validated public health threshold. Restricting the refrigeration life of RTE TCS foods to 7 days ensures that even if Listeria is present, it does not have enough time to multiply to a concentration that causes foodborne illness.

What Foods Must Be Date Marked? (And What is Exempt?)

To maintain compliance, kitchen managers and line staff must understand exactly which foods require date marking and which are exempt.

Date marking applies to any food that meets all three of these criteria:

• Ready-to-Eat (RTE): The food does not require any further cooking, washing, or preparation steps to make it safe.
• Time/Temperature Control for Safety (TCS): The food requires strict temperature control (refrigeration) to limit pathogen growth or toxin formation.
• Held Over 24 Hours: The food is stored under refrigeration at 41°F (5°C) or below for more than 24 hours.

Date Marking Requirement Reference Chart

The following table details common restaurant foods that require date marking and lists the specific commercial items that are officially exempt under Section 3-501.17(G) of the FDA Food Code.

Important Exemption Rules

The exemptions for hard and semi-soft cheeses, cultured dairy, preserved fish, and dry cured meats only apply if these products are manufactured and packaged in a federally or state-inspected food processing plant.

For example, a block of commercially processed Cheddar cheese does not require date marking once opened because its low moisture content prevents Listeria growth. However, if your kitchen grates that Cheddar cheese and mixes it with cream cheese to make a house-made cheese spread, that spread is now a house-made RTE TCS food and must be date marked.

Similarly, commercially packaged potato salad purchased from an inspected supplier is exempt. But if your staff adds chopped hard-boiled eggs or sliced celery to that commercial potato salad on-site, the exemption is void, and the mixture must be date marked with a 7-day discard limit.

How Freezing Affects the Date Marking Clock

Freezing food stops the date marking clock, but it does not reset it. This is a common point of confusion for kitchen staff. Freezing temperatures (0°F / -18°C or below) stop bacterial growth entirely, suspending Listeria in a dormant state. However, freezing does not kill Listeria.

When food is thawed and returned to refrigerated cold holding (41°F or below), the date marking clock resumes exactly where it left off before freezing. The total cumulative time the food spends under refrigeration before freezing and after thawing must not exceed 7 days.

To stay compliant, the container must be labeled with three distinct dates:

1. The original preparation or opening date.
2. The date the food was placed in the freezer.
3. The date the food was removed from the freezer to thaw.

Under Section 3-501.18, if a kitchen cannot provide clear documentation showing how many of the original 7 days were used before the food was frozen, the thawed food must be used or discarded within 24 hours of removal from the freezer.

The Freeze-Thaw Math: A Concrete Timeline

This step-by-step example illustrates the correct way to calculate the shelf life of a TCS food that undergoes freezing and thawing:

• Day 1 (October 1): The kitchen cooks a large batch of marinara sauce, cools it, and stores it in the walk-in cooler at 41°F.
• Day 2 (October 2): The marinara sauce remains in cold holding at 41°F. (1 day of refrigerated life used).
• Day 3 (October 3): The kitchen manager decides to freeze the remaining sauce. It is placed in the freezer at 0°F. (2 days of refrigerated life used. The clock stops. The label is marked with the prep date of October 1 and the freeze date of October 3).
• October 4 to October 9: The sauce remains frozen solid. (Clock is paused; no days are counted).
• Day 4 (October 10): The sauce is moved back to the walk-in cooler to thaw at 41°F. (The clock resumes. The label is marked with the thaw date of October 10).
• Day 5 (October 11): The sauce is fully thawed and held at 41°F. (3 days of refrigerated life used).
• Day 6 (October 12): Held at 41°F. (4 days of refrigerated life used).
• Day 7 (October 13): Held at 41°F. (5 days of refrigerated life used).
• Day 8 (October 14): Held at 41°F. (6 days of refrigerated life used).
• Day 9 (October 15): Held at 41°F. (7 days of refrigerated life used. The marinara sauce must be consumed, sold, or discarded by midnight tonight).

Rules for Combining Ingredients: The Oldest Ingredient Rule

In a commercial prep kitchen, ingredients are constantly combined to create new menu items. For example, sliced turkey prepped on Monday might be combined with bacon prepped on Tuesday and tomatoes sliced on Wednesday to make turkey wraps.

When different ready-to-eat TCS ingredients are combined, the discard date of the final mixture is determined entirely by the oldest ingredient in the mix. The clock never resets, and you cannot use the date of the newest ingredient to extend the life of the older components.

Consider this scenario:

• Ingredient A: Cooked chicken breast prepared on Monday, October 1 (Discard date: Sunday, October 7).
• Ingredient B: Fresh celery diced on Wednesday, October 3 (Discard date: Tuesday, October 9).
• Ingredient C: House-made mayonnaise opened on Thursday, October 4 (Discard date: Wednesday, October 10).
• The Mixture: On Thursday, October 4, the chef mixes the chicken, celery, and mayonnaise to create chicken salad.
• The Mark: The container of chicken salad must be date marked with a discard date of Sunday, October 7. This matches the cooked chicken breast, which is the oldest ingredient.

The Danger of Topping Off

Kitchen staff must never "top off" or mix older batches of food with freshly prepared batches in the same container. Pouring fresh ranch dressing into a squeeze bottle that still has a cup of week-old dressing at the bottom forces the entire new batch to inherit the older batch's discard date.

This practice is highly dangerous because Listeria in the old dressing can quickly contaminate the fresh product. Every batch of food must be stored in its own clean, sanitized, and separately marked container.

Step-by-Step SOP for a Compliant Date Marking System

Establishing a compliant date marking system requires a structured Standard Operating Procedure (SOP) that aligns with active managerial control. Use these steps to build a reliable system in your kitchen:

1. Standardize Your Marking Method

Choose one marking system and apply it consistently across your entire operation. Common methods include:

• Handwritten Labels: Using a moisture-resistant marker on green painter's tape or dedicated dissolvable food safety labels. Labels must show the item name, preparation/opening date, and the mandatory discard date.
• Color-Coded Day Dots: Applying adhesive dots where each day of the week has a designated color (e.g., blue for Monday, yellow for Tuesday). Ensure the day dot represents the discard day, not the prep day, and train your staff to recognize this difference.
• Digital Label Printers: Using smart kitchen scales and label printers that automatically calculate and print the 7-day discard date when an employee selects an item from a digital menu.

2. Verify and Log Holding Temperatures

Date marking is only valid if cold holding equipment consistently maintains food at 41°F (5°C) or below. If a refrigeration unit fails and temperatures rise into the danger zone, the 7-day clock is broken, and pathogens will grow rapidly. Ensure your team checks refrigeration temperatures at least twice daily. You can download and print our [/resources/food-temperature-log-template/](/resources/food-temperature-log-template/) to keep accurate, manual logs at every station.

3. Conduct Daily Pre-Service Audits

Before lunch and dinner rushes, a manager or station lead must walk the prep lines and walk-in coolers to check that every container has a valid label and that no expired food is on the line. Integrating this task into your shift routines prevents expired items from reaching customers. Our [/resources/restaurant-line-check-template/](/resources/restaurant-line-check-template/) offers an excellent framework for structuring these daily line checks.

4. Build a Culture of Real-Time Compliance

Ensure your crew understands that date marking must happen immediately. Slicing deli meat or prepping sauces and leaving them unlabeled in the walk-in "to label later" is a direct path to critical violations. Address and eliminate shortcuts like "pencil-whipping" logs (falsifying dates on records). Check out our guide on [/resources/stop-pencil-whipping-checklists/](/resources/stop-pencil-whipping-checklists/) to learn how to foster an honest, safety-first kitchen culture.

5. Enforce Deep Cleaning and Sanitization

When a food item reaches its discard date, it must be thrown away immediately. The empty container must be taken directly to the dishwashing station to be thoroughly washed, rinsed, and sanitized. Never refill a container that has not been sanitized. Incorporate container rotation and line audits into your regular [/resources/kitchen-cleaning-schedule/](/resources/kitchen-cleaning-schedule/) to prevent cross-contamination.

What Health Inspectors and Managers Check

During a routine health inspection, the officer will closely evaluate your date marking practices. In almost all jurisdictions, a failure in date marking or disposition is classified as a Priority Foundation or Priority Violation—commonly known as a critical violation. These violations must be corrected on-site immediately.

The health inspector will check:

• Thermometer Calibrations: Verifying that your walk-in coolers and prep top refrigerators are maintaining an internal food temperature of 41°F (5°C) or below.
• Unmarked Containers: Searching for any eligible RTE TCS foods stored for more than 24 hours that lack a day or date mark.
• Expired Inventory: Looking for containers where the marked discard date has passed.
• Mismatched Dates: Checking for frozen prep items that lack prep, freeze, or thaw dates.
• Log Verifications: Reviewing your temperature logs to ensure they match real-time observations and have not been backfilled.

As a kitchen manager, you should perform internal audits using these exact same criteria. If you catch an unlabeled container or an expired product during your shift walk, take immediate corrective action.

Common Failure Modes and Corrective Actions

Train your kitchen team to recognize these common date marking failures and execute the correct, non-negotiable corrective actions.

Unmarked RTE TCS Food on the Line

• The Failure: An inspector or manager finds a container of prepped cooked chicken in the walk-in cooler that has been stored for more than 24 hours but has no date label.
• Corrective Action: Discard the food immediately. Under FDA Food Code Section 3-501.18, if the preparation or opening date of a TCS food cannot be proven, the food cannot be served. It must be thrown away. Do not attempt to guess the prep date or ask staff when they think it was prepped.

Expired Food in Storage

• The Failure: A container of house-made marinara sauce marked with a discard date of yesterday is found in the reach-in cooler.
• Corrective Action: Discard the food immediately. You must never cook, reheat, or freeze expired food in an attempt to save it. Reheating does not destroy heat-stable toxins that may have been produced by bacteria during prolonged storage.

Missing Freeze-Thaw Documentation

• The Failure: A container of thawed beef stew is marked with a thaw date, but the original prep date and the freeze date are missing.
• Corrective Action: The food must be consumed or discarded within 24 hours of thawing. If you cannot prove how many of the original 7 days were used before freezing, you must treat the food as if it only has 24 hours of safe refrigerated life remaining.

Returning Time-As-A-Control (TPHC) Food to Cold Holding

• The Failure: At the end of a dinner service, a cook places leftover shredded lettuce held under the 4-hour TPHC rule back into the walk-in cooler to be date marked for tomorrow's shift.
• Corrective Action: Discard the lettuce immediately. Once food is removed from temperature control under TPHC, it is on a one-way path to service or disposal. Returning TPHC items to cold holding is a severe food safety violation.

US Jurisdictional Caveats & Adoption Variances

Because the FDA Food Code is a model code and not a federal law, its provisions are not automatically binding across the United States. Each state, county, or municipality decides whether to adopt the Food Code, which version to adopt, and whether to introduce custom amendments.

This creates critical regulatory variances that restaurant operators must navigate:

• Older Food Code Adoptions: Some states still operate under older versions of the Food Code (such as the 2013 or 2017 editions). While the core 7-day date marking rule remains consistent across these versions, minor details—such as specific exemptions for certain types of pre-packaged foods—can vary.
• Custom State Codes: States like California (California Retail Food Code) and Texas (Texas Food Establishment Rules) write their own custom codes. These codes are heavily based on the FDA Food Code but contain regional amendments regarding labeling formats, training credentials, and enforcement procedures.
• Local Policy Approvals: Certain municipal and county health departments require restaurants to submit their written date marking SOP for formal review and approval before they can obtain a health permit. Other jurisdictions do not require prior approval but will inspect the active execution of the system on the line.

Always contact your local environmental health specialist or local health department to verify the exact edition of the Food Code enforced in your county or municipality, along with any specific local amendments that apply to your restaurant.

Streamline Your Restaurant Operations with Food Ops

If you are managing kitchen operations across multiple locations, tracking manual date labels, ensuring compliance, and verifying temperature logs can be a massive operational challenge. Paper binders easily get lost, grease pencil markings on pans wear off, and manual log sheets are highly susceptible to being backfilled or ignored.

Food Ops helps multi-location restaurant groups digitize and automate their entire food safety system. By moving from paper logs to a centralized digital platform, managers can oversee temperature logs, date marking checklists, and kitchen cleaning schedules in real-time. This eliminates paper clutter, ensures 100% compliance during inspections, and fosters a strong food safety culture across your teams.

Book a demo with the Food Ops team today to see how we help kitchens eliminate paper logs and run compliant, high-performing operations.

Official sources

• FDA Food Code 2022 - The official federal model code outlining the detailed ready-to-eat TCS food date marking (§ 3-501.17) and disposition (§ 3-501.18) requirements.
• FDA Date Marking Fact Sheet - The official National Retail Food Team guidance document providing visual examples of compliant date marking and discard calculations.
• Michigan Department of Agriculture and Rural Development (MDARD) Date Marking Guide - A practical, state-level regulatory guide detailing cheese exemptions and freezing math.
• Wisconsin Department of Health Services Admin Code 3-501.17 - Legal administrative code detailing state-specific date marking rules, cheese moisture parameters, and exemptions.
• Indiana State Department of Health Date Marking Guidelines - A comprehensive state-level guidelines sheet clarifying rules on cultured dairy, dry fermented sausages, and preserved fish products.