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An FMCSA Warning Letter: What to Do Next

A warning letter arrived and the owner is treating it as either junk mail or a shutdown. It is neither. It is an early intervention aimed at one BASIC.

Not a fine

Not a rating

Named BASIC

Read that one

Thresholds

From the methodology PDF

DataQs

Wrong lines only

OQ

Ahmad Qazi

Founder & CEO, O Trucking LLC

Published: October 3, 2026Updated: October 3, 2026

Fact-Checked by O Trucking Owner-Operator Desk

Walks carriers through a warning letter without a seven-BASIC textbook

5+ Years Experience80+ Carriers ServedIndustry Data Verified

Written by Ahmad Qazi, founder of O Trucking LLC, drawing on 9+ years dispatching for owner-operators. Learn more about us.

Quick Answer
An SMS warning letter is an early intervention when a Behavior Analysis and Safety Improvement Category is at or above the intervention threshold. It is not a civil penalty and it is not an Unsatisfactory safety rating. The letter names the BASIC. The work is the inspections inside that BASIC, not a generic safety meeting. The current SMS Methodology document, Table 2-2, sets general-carrier thresholds at 65 percent for Unsafe Driving, the Crash Indicator, and HOS Compliance, and at 80 percent for Vehicle Maintenance, Controlled Substances and Alcohol, and Driver Fitness. Passenger thresholds in that table are 50 and 65 percent. Hazardous-materials thresholds are 60 and 75 percent. Hazardous Materials Compliance is 80 percent across carrier types in that table. Download the methodology PDF the week the letter arrives, because a later methodology change would move numbers. DataQs can correct a wrong citation or an eligible crash. It cannot remove a true violation because you fired the driver. Paths: DataQs and how to dispute a DOT violation. Percentiles are explained on SMS BASIC scores. This is not a seven-BASIC textbook.

Key Takeaways

  • A warning letter is an intervention, not a fine and not an Unsatisfactory rating.
  • Work the BASIC named in the letter.
  • Quote thresholds from the current SMS Methodology PDF, not from memory of an old class.
  • DataQs fixes wrong data. It does not forgive a true violation.
  • Ignoring the letter is how carriers reach the next intervention. The letter does not invent a day count.
  • The BASIC categories guide already exists. Do not rebuild it here.

A warning letter is an intervention, not a fine

FMCSA uses the Safety Measurement System to prioritize carriers whose percentiles sit at or above an intervention threshold. A warning letter is the early step in that system. It tells you a BASIC has crossed the line the methodology uses. It does not assess money. It does not assign a safety rating of Unsatisfactory or Conditional. Carriers who pay a stranger to make the letter go away are paying for a service the letter did not request. Carriers who throw it out are ignoring the step that exists so the next step does not have to be an investigation.

Read the date, the BASIC, and any instruction to log into the SMS portal. Then stop treating the envelope as either a bill or a shutdown order.

Which BASIC tripped it

The letter names the category. Unsafe Driving, Hours-of-Service Compliance, Vehicle Maintenance, Controlled Substances and Alcohol, Driver Fitness, Hazardous Materials Compliance, or the Crash Indicator: work the one that is named. If two letters name two categories, work both. A generic safety meeting that does not open those inspections will not change the percentile.

The seven-category textbook already exists. This page will not rebuild it. When you need the definition of the category, use the CSA basics guide. When you need what a percentile is, use SMS BASIC scores. When you need what to do this week, stay here.

What to pull: inspections, crashes, the percentile

Pull every inspection and crash that feeds the named BASIC for the SMS time window. Sort them by violation, not by driver gossip. A percentile is a comparison to peers in your safety-event group. It is not a count of tickets. Ten violations can be a high percentile in a small fleet and a lower one in a large fleet. Do not argue with the letter by saying we only had a few. Look at the percentile the portal shows and the violations under it.

Table 2-2 of the SMS Methodology PDF posted by FMCSA is the threshold table to quote. In the version carriers download from csa.fmcsa.dot.gov, a general carrier is prioritized at 65 percent in Unsafe Driving, the Crash Indicator, and HOS Compliance, and at 80 percent in Vehicle Maintenance, Controlled Substances and Alcohol, and Driver Fitness. Passenger-carrier thresholds in that table are 50 percent and 65 percent for those same groups. Hazardous-materials carrier thresholds are 60 percent and 75 percent. Hazardous Materials Compliance is listed at 80 percent for all three carrier types. Your carrier type, passenger, HM, or general, is defined in the methodology, not by what you feel your fleet is. If a newer PDF replaces those numbers, quote the newer PDF. Do not quote a classroom handout.

Download the methodology the week the letter arrives

Thresholds live in that PDF. A number remembered from a 2019 seminar is how you fix the wrong BASIC or none at all.

What to fix in the next 30 days

Thirty days is a planning habit, not a deadline FMCSA printed in every letter. Use it so the work does not wait for the next intervention. For a maintenance BASIC, repair the defects the inspections repeat and tighten the inspection that should have caught them. For hours, correct the logging practice the violations describe. For driver fitness, pull the licenses and medical status the inspections say were wrong. For crashes, look at preventability only through the CPDP rules, not through a hope that every crash leaves the math.

Write down what changed: who was trained, which truck was repaired, which driver was removed from a vehicle they were not qualified for. A sign-in sheet with no relation to the violation codes is the generic meeting this page told you not to hold.

What DataQs can and cannot remove

DataQs can remove or correct a wrong citation, a wrong carrier assignment, or an eligible crash through the right request. It cannot remove a true violation because you fired the driver, paid the driver, or promised it would not happen again. Use the DataQs challenge process and how to dispute a DOT violation when a line is actually wrong. File those challenges while the evidence exists. Do not file them as a substitute for fixing the trucks that were accurately written up.

A challenge that loses leaves the violation in the BASIC. Plan the fix as if the challenge will lose. If it wins, the percentile may improve. If it loses, the repair still had to happen.

What happens if you do nothing

Ignoring the letter is how carriers meet the next intervention, which can be an investigation. This page will not invent a number of days FMCSA did not put in your letter. Some letters are followed by quiet if the percentile falls because old inspections age out and new ones are clean. Some are followed by a review because the percentile stays up. You do not control which, except by changing the violations that feed the math.

A warning letter does not park the fleet. An investigation might produce a rating later, and a rating has its own rules. Do not skip the letter and then act surprised by the review. Do the BASIC work while the intervention is still a letter.

Pro Tip

Print the inspections in the named BASIC, highlight the repeated violation codes, and assign one fix to each repeated code this month. That list is the answer to the letter.

Keep the letter in the safety file with the list of fixes. When someone asks what you did after the warning, the file should answer without a speech.

The letter is also not a request to hire a consultant who promises to lower the percentile by a date. Percentiles move when violations age, when new clean inspections dilute the measure, and when wrong data is corrected. A promise of a specific percentile by a specific Friday is a sales line. Your job is the repairs and the qualifications the inspections already described.

If the named BASIC is the Crash Indicator, read the crash list before you write a training memo. A crash that fits a preventability category is a CPDP request, not a DataQs request about a citation. A crash that does not fit stays in the measure. Do not send the warning letter to a crash program as if the letter itself were a challenge.

Passenger and hazmat carriers should check the carrier-type column before they compare themselves to a general-freight neighbor. A 70 percent Vehicle Maintenance percentile can be over the passenger threshold and under the general threshold in the same table. Using the wrong column is how a letter gets dismissed as a mistake when it is not one.

Share the named inspections with the drivers who were in them, without turning the meeting into a speech about every BASIC. The driver who had the lamp out does not need a lecture on random testing. The driver who had the log violation does not need a lecture on coupling devices. Specific is faster, and specific is what the percentile responds to over time.

Log into the portal the letter points to and confirm the percentile matches the paper. A letter generated from an older snapshot can arrive after a violation has already aged off. If the portal is already under the threshold, keep the fixes anyway and keep the letter. If the portal is worse than the letter, use the portal. The paper is the notice. The account is the current math.

Frequently Asked Questions

Is the warning letter a fine?

No. It is an early SMS intervention. It does not assess a civil penalty and it is not an Unsatisfactory safety rating. Do not pay anyone who describes it as a fine you can settle with them.

Which BASIC do we fix?

The one the letter names. A meeting about every possible violation is not the work. The inspections and crashes inside that BASIC are the work.

What are the thresholds?

Use Table 2-2 of the SMS Methodology PDF. For a general carrier that table uses 65 percent for Unsafe Driving, Crash Indicator, and HOS Compliance, and 80 percent for Vehicle Maintenance, Controlled Substances and Alcohol, and Driver Fitness. Passenger and hazmat carrier types use the lower columns in the same table. If FMCSA has replaced the PDF, the new table wins.

Can DataQs remove the points if we fired the driver?

No. DataQs corrects inaccurate data. A true violation stays after the driver is gone. Firing the driver may stop the next one. It does not delete the last one.

How many days until the next intervention?

The letter does not create a universal day count, and this page will not invent one. The next step if the percentile stays over the threshold can be an investigation. Treat the letter as the notice to fix the BASIC now.

Where do percentiles get explained?

On the SMS BASIC scores guide. The seven categories are on the CSA basics page. This article is only the letter in your hand.

Open the BASIC the letter names. Fix those inspections.

O Trucking does not file DataQs challenges. After authority is ACTIVE, dispatch is a flat weekly fee.

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