FMCSA detention time rules: what every fleet operations team needs to know

There is a common misconception that federal law requires shippers and brokers to pay carriers for detention time. It does not. For fleet operations teams managing 50 to 500 trucks, understanding the actual regulatory landscape is critical to building enforceable detention policies, training drivers on documentation standards, and recovering revenue at scale. Here is what the law actually says, what protections your fleet has, and where regulation may be headed.

Last updated: April 2026 · Bastion Recovery Research Team

What FMCSA defines as detention time

FMCSA defines detention time as any time a commercial motor vehicle driver spends at a shipping or receiving facility beyond two hours. This is the definition used in FMCSA's ongoing research studies and federal data collection efforts.

Under Hours of Service regulations (49 CFR Part 395), detention time is classified as on-duty not-driving time. This means it counts against the 14-hour driving window and the 60/70-hour weekly limits — even though your drivers are not moving freight. For fleet operations, this has a compounding effect: a single detention event can disrupt schedules across multiple subsequent loads.

Current federal regulations

There is no federal regulation that requires shippers, receivers, or brokers to pay carriers for detention. Detention pay is governed entirely by the contract between the parties — specifically the rate confirmation and broker-carrier agreement.

Here is what federal law does address:

Coercion prohibition rule (49 CFR 390.6)

Effective January 29, 2016, this rule prohibits motor carriers, shippers, receivers, and transportation intermediaries from coercing a driver to operate a commercial motor vehicle in violation of Hours of Service regulations (Parts 390-399) or hazmat regulations (Parts 171-180).

In the detention context: if a shipper or receiver detains one of your drivers for hours and then pressures them to drive beyond legal limits to make up time, that is coercion. Penalties can apply to the entity that coerced the violation. Your fleet should establish a clear internal reporting protocol so drivers can flag these incidents in real time, and your operations team can file a coercion complaint with FMCSA within 90 days of the event under 49 CFR 386.12.

Broker surety bond requirements (49 CFR 387.307)

Freight brokers must maintain a $75,000 surety bond (BMC-84) or trust fund (BMC-85). While not specific to detention, carriers can file claims against a broker's bond for unpaid contractual obligations — including detention charges specified in the rate confirmation.

Legislative history

MAP-21 (2012)

The Moving Ahead for Progress in the 21st Century Act directed FMCSA to conduct a study on the impacts of driver detention time, including frequency and severity.

FAST Act (2015)

The Fixing America's Surface Transportation Act directed FMCSA to issue regulations covering the collection of data on delays experienced by CMV operators at loading and unloading facilities. It also directed the DOT Office of Inspector General to report on the effects of driver detention.

Infrastructure Investment and Jobs Act (2021)

Mandated a study by the Transportation Research Board on the effects of various driver compensation methods on safety and retention, including payment for detention time.

Recent FMCSA activity (2023-2026)

In February 2024, FMCSA approved a new three-year information collection request titled "Impact of Driver Detention Time on Safety and Operations." This study is scheduled to conclude in mid-2025 and will inform future policy decisions.

In September 2025, FMCSA proposed a pilot program allowing drivers to "pause" their 14-hour driving window for up to 3 hours. This is explicitly designed to mitigate the safety impacts of detention time — but it is an HOS flexibility measure, not a detention pay rule.

As of April 2026, no proposed rulemaking on detention pay has been published by FMCSA. The agency remains in the study and data-collection phase.

What rights do carriers actually have?

1. Contractual rights — whatever detention terms are specified in your rate confirmations are binding. This is your fleet's primary legal basis for collecting detention pay.
2. Protection from coercion — your drivers cannot be forced to violate HOS after being detained (49 CFR 390.6).
3. Right to file a coercion complaint — within 90 days, with OSHA retaliation protections.
4. Bond claims — your fleet can file a claim against a broker's $75,000 surety bond for unpaid contractual obligations.
5. State contract law — breach of contract claims under applicable state law.

The bottom line: your rate confirmation is your detention policy. If detention terms are not in writing before your driver accepts the load, federal law will not help your fleet collect after the fact.

Training drivers on detention documentation standards

For mid-size fleets, inconsistent documentation is the single largest reason detention claims get denied. According to TCA's 2024 carrier benchmarking report, carriers with standardized detention documentation protocols recover 2-3x more detention revenue than those without. Your operations team should build a fleet-wide documentation standard and train every driver on it.

What to train on

• Arrival time capture — drivers must record the exact time they arrive at the facility gate, not when they reach the dock. Use GPS-stamped timestamps from the ELD or TMS when possible.
• Free time threshold — every driver should know the contractual free time for each load (typically 2 hours, but varies by rate confirmation). Train drivers to check the rate confirmation before arrival.
• Departure time capture — record the time the driver is released from the facility, not when loading/unloading ends. The difference matters.
• Facility contact names — drivers should note the name and role of the facility contact they check in with. This strengthens claims when disputes arise.
• Photo evidence — timestamped photos of dock signage, check-in sheets, and any facility-issued paperwork. ATRI research shows that claims with photographic evidence are resolved 40% faster.
• Written notes on delays — a brief note explaining the reason for the delay (e.g., "Waited 3 hours for dock assignment — facility understaffed"). Drivers do not need to write a report; one sentence is enough.

Fleet-wide documentation protocol

Your operations team should standardize detention documentation into a repeatable process:

1. Pre-dispatch — include detention terms in the driver's load packet or TMS workflow. Make the free time threshold and hourly rate visible before the driver arrives.
2. On-site — drivers follow the documentation checklist: arrival time, facility contact, photo evidence, departure time, delay notes.
3. Post-delivery — drivers submit detention documentation within 24 hours. Delays beyond 48 hours drastically reduce recovery rates.
4. Operations review — a designated team member reviews submissions for completeness before filing the claim. Flag incomplete records for driver follow-up.

How to audit compliance

Run a monthly audit on a random sample of loads where detention was likely (dwell time over 2 hours per ELD data) and check whether documentation was submitted. Track a fleet-wide documentation compliance rate. ATRI's 2024 operational costs study found that fleets averaging above 80% documentation compliance recovered significantly more detention revenue per truck per year than fleets below that threshold.

Key metrics to track: documentation submission rate, average time from detention event to claim filing, claim approval rate by broker, and revenue recovered per truck per quarter.

DOT Inspector General findings on detention safety

The DOT OIG report (ST2018019, January 2018) found that a 15-minute increase in average detention time increases the expected crash rate by 6.2%. Each one-minute reduction in average detention time nationwide would prevent roughly 400 crashes per year.

ATRI's September 2024 study found that detained trucks drove 15% faster than non-detained trucks, and 57% of drivers reported being late or cancelling subsequent pickups due to detention at a previous facility. For fleet operations teams, these findings underscore why detention is not just a revenue problem — it is a safety and compliance liability that affects CSA scores and insurance costs.

For a step-by-step guide to recovering detention pay across your fleet, see our complete fleet detention pay recovery guide. For information on calculating the full cost of detention to your operations, see calculating fleet detention costs.