TPHC for US Restaurants: FDA Food Code Rules & SOP

Understanding Time as a Public Health Control (TPHC)

In busy commercial kitchens, maintaining continuous temperature control—using steam tables or cold wells—for every item on the line can slow service, dry out delicate foods, and crowd stations. This is why Time as a Public Health Control (TPHC) is such a valuable operational tool.

Defined under Section 3-501.19 of the FDA Food Code, TPHC is a food safety practice allowing restaurants to hold Time/Temperature Control for Safety (TCS) foods without active temperature control. Rather than relying on continuous heating or cooling, TPHC uses a strict time limit to prevent pathogens like Salmonella and Listeria monocytogenes from multiplying to dangerous levels.

While TPHC improves kitchen efficiency, health departments audit this practice closely. Failure to manage TPHC correctly is a direct route to critical violations during health inspections.

The Core FDA Rules: 4-Hour vs. 6-Hour TPHC

The FDA Food Code provides two TPHC paths. Operators must document their chosen option in their written procedures.

The 4-Hour TPHC Option

The 4-hour option applies to both hot-holding and cold-holding TCS foods.

• Hot Foods: Must begin at 135°F (57°C) or above when removed from temperature control.
• Cold Foods: Must begin at 41°F (5°C) or below when removed from refrigeration.
• 2022 Food Code Exception: Ready-to-eat produce cut on-site (such as sliced tomatoes or cut melons) can begin their 4-hour window at room temperature (70°F/21°C or below). They must not exceed 70°F during the 4 hours.
• Action: Food must be cooked and served, served immediately, or discarded within 4 hours.
• Marking: Containers must be marked with the exact removal time, the 4-hour discard time, or both.

The 6-Hour TPHC Option

The 6-hour option is reserved strictly for cold-holding TCS foods.

• Initial Temperature: Cold foods must begin at 41°F (5°C) or below when removed from refrigeration.
• Active Monitoring: The food's temperature must never exceed 70°F (21°C) during the 6 hours.
• Immediate Discard: If the food rises above 70°F (21°C) at any point, it must be discarded immediately.
• Action: Food must be served, cooked and served, or discarded within 6 hours.
• Marking: Containers must be marked with the starting time and the 6-hour discard time.

Crucial Constraints and Prohibitions

To safely implement TPHC, kitchen staff must treat its limits as absolute. There are three primary restrictions that inspectors audit.

The Point of No Return

Once food is placed under TPHC, it can never go back into temperature control. For example, if a pan of cheese slices is held under TPHC, any remaining slices cannot be returned to the walk-in cooler at shift end. Once food is removed from temperature control, it is on a one-way path to consumption or disposal. Returning TPHC items to refrigeration is a critical safety violation.

Highly Susceptible Populations (HSPs)

Establishments serving highly susceptible populations—such as nursing homes, hospitals, schools, or daycares—face stricter regulations. Under the FDA Food Code, TPHC cannot be used for raw shell eggs in these facilities. Some local health jurisdictions prohibit TPHC entirely for high-risk establishments.

No Mixing or Topping Up

Kitchen staff must never add fresh food to an active TPHC container. Pouring fresh cooked food into a pan that has been sitting out for two hours resets the clock for the entire container to the older batch's expiration, creating a major cross-contamination hazard. Every batch must be kept in its own separate, marked container.

Step-by-Step TPHC Implementation SOP

Establishing a compliant TPHC system requires a structured Standard Operating Procedure (SOP) that aligns with active managerial control.

1. Maintain Written Procedures on Site

Before starting TPHC, you must draft a detailed written procedure. This document must be kept in the kitchen and be immediately available to your health inspector. It must list every food item held under TPHC, the time option chosen (4 or 6 hours), the marking method, and the discard protocol.

2. Standardize Your Marking Method

Choose a clear way to mark time. Common methods include writing directly on the pan with a grease pencil, using color-coded adhesive labels, or maintaining a station whiteboard. The chosen method must be explained in your written procedures and applied consistently.

3. Verify Initial Temperatures

Food cannot go under TPHC if it starts in the temperature danger zone. Before removing food from refrigeration or hot holding, use a calibrated probe thermometer to verify that the food meets starting temperature requirements. Check our [/resources/food-temperature-log-template/](/resources/food-temperature-log-template/) for step-by-step instructions on calibrating thermometers and keeping accurate logs.

4. Execute Timely Discard and Station Cleaning

When the expiration time is reached, the remaining food must be thrown away immediately. The container must then be taken to the dish pit to be washed, rinsed, and sanitized. It cannot be refilled on the line. Incorporating this step into your regular [/resources/kitchen-cleaning-schedule/](/resources/kitchen-cleaning-schedule/) ensures that stations remain sanitary and free from biofilm buildup.

Practical TPHC Written Procedures Template

Use this template to document your kitchen's TPHC protocol. Keep a printed copy of this document in your food safety binder.

• Establishment Name: [Insert Restaurant Name]
• Permit/License Number: [Insert Permit Number]
• Date Implemented: 2026-07-17

Specific Food Items and Time Options

Monitoring and Discard Protocol

• At the sushi station, the sushi chef must discard any remaining sushi rice when the countdown timer hits zero.
• For 6-hour cold holding, the kitchen supervisor must probe the cheese every 2 hours. If the internal temperature exceeds 70°F (21°C), the cheese is discarded immediately.
• Once the time limit expires, all leftover food must be discarded. Empty pans must be moved to the dishwashing station for complete cleaning and sanitizing before being reused.

Common Failure Modes and Corrective Actions

Training your crew to recognize these failure modes and execute immediate corrective actions is a key part of active managerial control.

• No Written Procedures On-Site: Holding TCS foods without a written TPHC document on-site violates FDA Food Code Section 3-501.19(A). Corrective Action: Discard the food immediately if removal time cannot be proven. Draft the written procedures, train the crew, and keep the document in the food safety binder.
• Unmarked or Post-Expiration Containers: An inspector finding an unmarked or expired pan on the line will issue a critical violation. Corrective Action: Discard the food immediately. No debate or re-probing is permitted. Assign a line lead to audit labels during the pre-service walk. See our [/resources/restaurant-line-check-template/](/resources/restaurant-line-check-template/) to see how pre-service checks catch labeling issues before service begins.
• Returning TPHC Food to Refrigeration: Attempting to save TPHC food at shift end by placing it back in the walk-in cooler is a severe safety violation because pathogens may have already started growing. Corrective Action: Discard the food immediately. Adjust prep pars so that smaller quantities of TCS foods are used.
• Cold Food Exceeding 70°F Under the 6-Hour Rule: If cold shredded cheese held under the 6-hour TPHC rule exceeds 70°F (21°C), the food safety barrier is broken. Corrective Action: Discard the cheese immediately. If the room temperature is too warm, switch to the 4-hour option or return to active refrigeration.
• Pencil-Whipping the Log Sheets: Falsifying log sheet times is extremely dangerous and exposes guests to foodborne illness. Corrective Action: Discard any food associated with falsified logs. Real-time logging is required. Check our detailed guide on [/resources/stop-pencil-whipping-checklists/](/resources/stop-pencil-whipping-checklists/) to establish a kitchen culture that eliminates falsification and protects guests.

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 write custom amendments.

• Older Food Code Adoption: Some states still operate under older versions (such as 2013 or 2017). These do not contain the 2022 room-temperature-start exceptions for raw cut produce. In these jurisdictions, cut tomatoes must start at 41°F or below to use TPHC.
• Prior Approval Requirements: Many local health departments require restaurants to formally submit written TPHC procedures for review and approval before using time as a control. Operating without prior approval can lead to an automatic critical violation.
• Prohibitions on the 6-Hour Option: Some local jurisdictions do not allow the 6-hour cold holding option at all, restricting all TPHC operations to a 4-hour window.
• Establishment Restrictions: Certain local health departments restrict TPHC to specific food items or forbid mobile food units and temporary food booths from using it.

Always contact your local environmental health specialist to verify the exact TPHC adoption status and local requirements in your county or municipality.

Streamline Your Kitchen Operations with Food Ops

If you are managing kitchen operations across multiple locations, tracking manual logs and ensuring that written SOPs are actually followed on the line can be a major challenge. Paper binders get lost, and grease pencil markings on pans are easy to skip. Food Ops helps restaurant groups digitize operational checklists, temperature logs, and TPHC procedures into a single, intuitive system that your crew will actually use. Book a demo with the Food Ops team today to see how we help kitchens stay compliant and eliminate paper log hassle.

Official sources

• FDA Food Code 2022 Section 3-501.19 - The current federal model code outlining the official 4-hour and 6-hour TPHC standards and exceptions.
• CDC Food Safety Contributing Factors - CDC outbreak data showing that improper time and temperature control remains a leading cause of foodborne illness in US restaurants.
• Florida Department of Health TPHC Guidelines - A practical example of a state-level health agency's written procedures and compliance requirements.
• Tennessee Department of Health TPHC Standard Operating Procedure - A comprehensive guide on state-level adoption, including checklists and training standards.