What Is a CSA Score and How Does It Affect Your Fleet?

Key Takeaways

• CSA stands for Compliance, Safety, Accountability. Your score is a percentile from 0 to 100 inside the FMCSA Safety Measurement System and lower is better. A high percentile means most comparable carriers outperform you on safety.
• FMCSA scores your fleet across seven Behavior Analysis and Safety Improvement Categories, each scored independently. Crossing a threshold in even one category triggers enforcement attention regardless of how the other six look.
• Each violation is weighted by severity and recency. A citation from the past six months carries three times the impact of the same citation from 18 months ago, per FMCSA’s CSA methodology.
• Out-of-service violations carry an additional severity multiplier on top of their base weight, making a single OOS order more damaging to your percentile than several standard citations combined.
• HOS violations rose from 410,000 in 2023 to more than 500,000 in 2025, per RigDig data cited by Overdrive, April 2026, making HOS Compliance the fastest-growing risk category for most fleets.
• Your CSA data is publicly visible to anyone with your USDOT number. Insurance underwriters, freight brokers, and shippers pull it during their own risk reviews, so a high score affects your revenue, not only your audit frequency.
• Violations stay in the SMS window for 24 months and then drop off automatically. Consistent clean inspections are the most reliable way to reduce your percentile without waiting for a formal challenge.
• Carriers can formally challenge inspection records they believe are inaccurate through the FMCSA DataQs system, which is a direct route to removing a wrongly assigned violation from the SMS record.

Introduction

Your CSA score is one of the most consequential numbers attached to your operation, and most fleet managers are not checking it nearly as often as the people who use it to make decisions about your fleet. FMCSA recalculates it every month, insurance underwriters pull it at renewal, freight brokers check it before offering loads, and enforcement officers use it to decide which trucks to stop at the next weigh station. None of them ask for your input before acting on what they find.

The score is a percentile ranking inside FMCSA’s Safety Measurement System, produced separately for each of seven safety categories using your fleet’s roadside inspection history, crash data, and compliance review findings from the past 24 months. A rising percentile in any single category is enough to trigger enforcement attention regardless of how clean the other six look, and a score that crosses an intervention threshold sets off a sequence that moves from warning letters to off-site investigations to full compliance reviews.

How each category is scored, what the 2026 SMS methodology changes mean for your fleet right now, what a high percentile costs you beyond the audit itself, and how your ELD records connect directly to your HOS Compliance category are all covered below.

If you have questions about your fleet’s current compliance position or want to understand how your ELD records feed into your SMS profile, schedule a call with our team or reach us at (800) 261-4361.

What FMCSA Has on Your Fleet

Most carriers do not find out their CSA score is a problem until a warning letter arrives, an auditor calls, or an insurance renewal comes back higher than expected. By that point, the violations driving the score have been sitting in FMCSA’s Safety Measurement System for months, moving the percentile toward a threshold that enforcement treats as a flag. The warning letter is not the beginning of the problem. It is confirmation that the problem has already been building in public data that anyone with your USDOT number can pull at any time, without notifying you.

The gap between what most fleet managers know about their own score and what FMCSA, underwriters, and brokers already know is exactly where compliance risk lives. None of them wait for your input before acting on what they find, and none of them are required to tell you they checked.

Your CSA score is not a verdict and it is not permanent. It is a running calculation built from individual data points, and individual data points can be managed, challenged, and prevented. For context on how violations follow both a driver and a carrier through the FMCSA system over time, our article on how ELD violations affect your record covers the scoring timeline in full.

What Is a CSA Score and How Does the System Work?

Your CSA score is a percentile ranking inside FMCSA’s Safety Measurement System, recalculated monthly using a rolling 24-month window of your fleet’s roadside inspection history, crash data, and compliance review findings. The percentile runs from 0 to 100, and lower is better. A score of 20 in a given category means your fleet performs better than 80 percent of comparable carriers. A score of 78 means 78 percent of comparable carriers outperform you, which is where enforcement attention concentrates.

FMCSA does not produce a single overall score for your fleet. It produces a separate percentile for each of seven categories called BASICs, which stands for Behavior Analysis and Safety Improvement Categories. Each BASIC tracks a distinct type of safety behavior, each carries its own intervention threshold, and crossing a threshold in even one category can trigger warning letters, targeted inspections, or a full compliance review regardless of how clean the other six look.

The data feeding each category comes from three sources. Roadside inspection results are the most frequent contributor, since every citation written during a Level I, II, or III inspection flows into your record within days. DOT-reportable crash data adds a second layer, tracking crash frequency and severity. Findings from compliance reviews make up the third source. Every piece of this data belongs to your USDOT number, so every driver operating under your carrier authority contributes to your CSA record when they receive a citation at a roadside stop.

How Does FMCSA Actually Calculate Each Score?

FMCSA does not count violations and produce a raw number. Each violation goes through a two-factor weighting process before your carrier is ranked against peers, and those two factors are what make recent, serious citations far more damaging than older or minor ones.

The first factor is severity, which determines how much each citation damages your percentile. Every violation code carries a weight from 1 for minor paperwork issues up to 10 for the most serious safety violations, reflecting how closely the behavior correlates with crash risk. Out-of-service violations receive an additional multiplier on top of their base weight, which is why a single OOS order typically does more damage to your percentile than several standard citations combined.

The second factor is recency, which determines how much time-based weight each violation carries depending on when it was recorded. A violation from the past six months carries a time multiplier of 3, the same violation from seven to twelve months ago carries a multiplier of 2, and anything beyond twelve months drops to 1. After 24 months the violation exits the window entirely and no longer affects your score. Older violations shed weight steadily as they age, which means sustained clean performance moves your percentile down even without disputing a single historical record, because new clean inspection activity gradually replaces the weighted citations that are pulling your score up.

Once violations are weighted by both severity and recency, FMCSA normalizes the result by your fleet’s exposure, roughly how often your trucks get inspected relative to how much they operate, and ranks you against carriers with a similar inspection volume. A carrier with high inspection frequency and few violations can rank better than one with fewer violations but almost no inspection history, because the exposure adjustment accounts for operational scale rather than penalizing fleets that face more inspection opportunities.

What the 2026 SMS Overhaul Changed

FMCSA restructured its SMS methodology in 2026 in ways that affect scoring directly. The 950-plus violation codes previously in the system were consolidated into 116 violation groups, reducing the score volatility caused by minor coding differences between jurisdictions. Vehicle Maintenance was split into two separately scored categories: one for defects found by roadside inspectors during a physical inspection, and a new Driver Observed category for defects a driver should have caught during a pre-trip or post-trip inspection under 49 CFR 396.11. The Driver Fitness intervention threshold was raised from 80 percent to 90 percent after FMCSA found a lower crash correlation in that category than its prior analysis assumed. Carriers still referencing the old framework need to reassess which categories carry the most exposure under the current structure.

What Are the 7 BASIC Categories and What Feeds Each One?

Each BASIC is scored independently, which means a clean score in six categories does not protect you if the seventh crosses its threshold. Understanding what feeds each one is the starting point for identifying where your fleet’s actual risk is concentrated.

Unsafe Driving

Unsafe Driving covers speeding, reckless driving, improper lane changes, and following too closely. Under the 2026 overhaul, this BASIC absorbed all out-of-service and drug and alcohol violations that previously sat in a standalone Controlled Substances category, making it the broadest and highest-consequence category in the current system. A single OOS order now flows into Unsafe Driving, which is a meaningful change from how violations were distributed before 2026.

HOS Compliance

Every hours-of-service citation your drivers receive feeds this BASIC: exceeding the 11-hour driving limit under 49 CFR 395.3, violating the 14-hour on-duty window, failing to maintain accurate records of duty status under 49 CFR 395.8(a)(1), and ELD-related violations including operating on a revoked device under 49 CFR 395.22(a). HOS violations rose from 410,000 in 2023 to more than 500,000 in 2025, per RigDig data cited by Overdrive in April 2026. Your ELD records are the primary evidence an officer reviews when writing an HOS citation, and accurate, unedited logs are your first line of protection in this category.

Driver Fitness

Driver Fitness tracks CDL validity, medical certificate status, and driver qualification file documentation. The 2026 overhaul segmented this category between straight vehicles and combination vehicles and raised the intervention threshold from 80 percent to 90 percent. Carriers with current, complete qualification files for every active driver are in a strong position here, and the raised threshold gives most fleets more room before FMCSA attention concentrates in this category.

Vehicle Maintenance

This category tracks brake defects, tire violations, lighting failures, and other mechanical issues found by a roadside inspector during a physical inspection. Defects an inspector finds at roadside are, by definition, defects that were present when the truck left your yard. Consistent pre-trip inspection discipline is the most direct way to keep this category from accumulating points between formal inspections.

Vehicle Maintenance, Driver Observed

This is the new category created by the 2026 overhaul. It scores defects a driver should have caught during a required DVIR under 49 CFR 396.11 but did not. Fleets where drivers genuinely complete inspections rather than signing off without checking now receive direct scoring credit in a category that did not exist before this year. If your inspection reports look identical across every driver and every vehicle with no variation day to day, that pattern draws auditor attention and does not protect your score the way a documented, genuine inspection does.

Hazardous Materials Compliance

This BASIC applies only to carriers transporting hazardous materials and tracks placarding violations, packaging failures, and documentation deficiencies. Carriers not transporting hazmat are not scored in this category at all.

Crash Indicator

Crash Indicator tracks the frequency and severity of DOT-reportable crashes over the 24-month window. A crash is reportable when a vehicle was towed or when an injury or fatality occurred, regardless of fault. Because fault does not determine whether a crash appears in your record, reviewing crash data for errors and filing disputes through the FMCSA DataQs system is worth pursuing when the underlying record contains an inaccuracy.

What Happens When You Cross an Intervention Threshold?

Crossing a threshold does not automatically produce a fine or an out-of-service order. What it does is move your carrier into the portion of FMCSA’s prioritization system where closer attention follows in a defined sequence, and the sequence moves faster for carriers with multiple elevated categories or a pattern of recent violations.

The three categories most directly tied to crash risk, Unsafe Driving, HOS Compliance, and Crash Indicator, carry thresholds around 65 percent under the current methodology. Driver Fitness, Vehicle Maintenance, and Vehicle Maintenance Driver Observed carry thresholds in the 80 to 90 percent range. Hazmat Compliance carries stricter thresholds for carriers holding hazmat authority. The current figures are confirmed in FMCSA’s CSA methodology, which is worth checking directly since several thresholds shifted under the 2026 overhaul.

Once a carrier is above a threshold in one or more categories, the intervention sequence begins with a warning letter notifying the carrier of the elevated score and requesting corrective action documentation. If the percentile does not improve, an off-site investigation follows where auditors review your records remotely without visiting your facility. A full compliance review is the most intensive outcome, with auditors examining driver qualification files, HOS records, vehicle maintenance documentation, drug and alcohol program records, and your accident register either remotely or in person. The result of a compliance review is a safety fitness determination: Satisfactory, Conditional, or Unsatisfactory. An Unsatisfactory rating, under the FMCSA safety fitness procedures, can lead to loss of operating authority.

What Does a High CSA Score Actually Cost Your Fleet?

A high percentile in one or more categories produces three types of cost that compound each other, and most fleet managers do not see the connection between them until they are managing all three at the same time.

Enforcement exposure is the first and most immediate cost. Carriers above intervention thresholds are prioritized for targeted roadside inspections, which increases the frequency with which your drivers get pulled. More inspections create more opportunities for additional citations to enter the 24-month window and push the percentile higher. That cycle is far easier to prevent than to break once it is established.

Insurance cost is the second. Underwriters review your SMS data as part of the risk evaluation at renewal. A carrier with multiple categories above threshold represents measurably higher risk than a comparable carrier with clean scores, and that gap shows up in premium pricing. The FMCSA Safety Measurement System makes this data publicly accessible without your involvement, which means underwriters do not need to ask you for it and you have no visibility into when they pull it.

Freight access is the third. Shippers and brokers screen carrier safety data before awarding loads, and the filtering is typically automated. A carrier with an elevated Unsafe Driving or Crash Indicator score may not appear in a shipper’s approved-carrier pool at all. There is usually no explanation when this happens because the decision is made by a system rather than a person, and the only signal your operation receives is that the volume has dropped.

CSA Score Comparison Table

Thresholds vary by BASIC category and carrier type. The 65 percent figure applies to the three high crash risk BASICs. Driver Fitness and Vehicle Maintenance thresholds sit higher under the 2026 SMS overhaul. Confirm current figures against FMCSA’s CSA methodology.

Questions to Ask Before Your Next Inspection

Do we know our current percentile in each of the seven BASICs right now?

If you cannot answer that question immediately, you are managing compliance without a current picture of where you stand. Your percentile is publicly available through the FMCSA Safety Measurement System and updates monthly. Building a monthly review of each category into your compliance calendar costs nothing beyond the time to check, and carriers who catch a rising percentile early have months to correct it before a threshold is crossed. Carriers who discover the problem after a warning letter arrives do not have that runway.

Which violations from the past six months are carrying the most weight in our score right now?

Because violations from the past six months carry a 3x time multiplier, recent citations are doing the most damage to your current percentile. Pulling a list of roadside inspection results from the past 180 days and identifying which citations carry the highest severity weight in each BASIC tells you exactly where to concentrate improvement effort, rather than treating all historical violations as equally urgent. The recent and severe ones are the ones moving your score most directly today, and those are the ones worth addressing first.

Are all of our drivers operating on currently registered ELD devices?

FMCSA has removed 79 devices from the FMCSA registered ELD list since January 2025, with the most recent batch of 12 devices announced on May 20, 2026. A driver operating on a revoked device is treated under 49 CFR 395.22(a) as operating without an ELD, which generates a no-records-of-duty-status citation under 49 CFR 395.8(a)(1). That citation feeds your HOS Compliance BASIC with significant severity weight, and it is entirely avoidable. Verifying registration for every device in your fleet takes a few minutes and eliminates that exposure. Geosavi Compliance Now is currently listed on the FMCSA registered ELD list, and you can confirm hardware and connection options on our ELD platform and hardware.

Do we have a pre-trip inspection process that creates a verifiable documented record?

The 2026 SMS overhaul created the Vehicle Maintenance Driver Observed category specifically for defects a driver should have caught during a pre-trip or post-trip inspection under 49 CFR 396.11 but did not. Fleets where drivers genuinely complete and document their inspections now receive direct scoring credit in this category. If your inspection reports look identical across every driver and every vehicle with no variation day to day, that pattern draws auditor attention and does not protect your score the way a genuinely completed inspection does. The value of the process is in the documentation, not in the form being signed.

Have we reviewed our SMS inspection records for accuracy in the past 90 days?

Not every violation in your SMS record is necessarily correct. Officers sometimes assign citations to the wrong carrier, reference the wrong regulation, or record defects that were not present. Reviewing your inspection history and filing a Request for Data Review through the FMCSA DataQs system when a record is wrong removes points from your score before they age off naturally. Building a quarterly review of new inspection records into your compliance routine catches errors while they are recent and the dispute is most straightforward to resolve.

Do our drivers understand that their citations affect the fleet’s public CSA profile?

Drivers who understand that their roadside citations affect the carrier’s public CSA record, which in turn affects load access and insurance costs for the entire operation, take log accuracy more seriously. A brief orientation on how the scoring system works, delivered at onboarding and refreshed annually, is one of the lower-cost compliance investments available to a small or mid-size fleet. Our article on how fleet management connects to compliance outcomes explains how operational discipline across the fleet translates to a measurably cleaner SMS record over time.

Are our HOS records accurate enough to hold up under a targeted inspection right now?

The CVSA’s 2026 International Roadcheck, which ran May 12 to 14, 2026, named ELD tampering and log integrity as its primary focus. Falsification of records of duty status was the second most-cited driver violation in 2024, with 58,382 violations recorded nationally per CVSA data. Officers in the current enforcement environment are trained specifically to identify unidentified driving time, edits without annotations under 49 CFR 395.30(c)(2), and supporting documents that do not align with ELD entries. Logs that cannot explain every edit with a documented reason carry risk at every inspection stop, not only during a formal roadcheck period.

If we are already above a threshold in one category, what should our next 90 days look like?

Disputing every historical violation is not required to bring a score down. The time-weighting mechanism does most of the work once new violations stop entering the window, because older violations shed weight steadily as they age. A carrier running 90 days of clean, documented inspections will see a measurable percentile reduction in any BASIC where the elevated score is built on violations from the past 12 to 24 months. The practical focus for those 90 days is to confirm device registration, enforce pre-trip inspection documentation, brief drivers on current log accuracy expectations under the FMCSA HOS regulations, and review every new inspection report for errors within 30 days of the event while the DataQs window is clearest.

Frequently Asked Questions

Scorecard and CSA Basics

What does CSA stand for?

CSA stands for Compliance, Safety, Accountability. It is the FMCSA program that uses roadside inspection data, crash records, and compliance review findings to produce a monthly percentile ranking for every registered motor carrier in the United States, running from 0 to 100 with lower meaning better performance relative to comparable carriers.

How often does my CSA score update?

FMCSA’s Safety Measurement System updates monthly. A citation from a roadside inspection typically appears in the system within a few days of the event, but your percentile recalculates on the monthly cycle as new data from all carriers in your comparison group is processed together.

Can I see my own CSA score?

Yes. Your carrier’s SMS data is available through the FMCSA Safety Measurement System using your USDOT number and PIN. Some BASIC categories and underlying data are not publicly displayed for every carrier, but registered motor carriers can access their full profile through the system.

Who else can see my CSA score?

The data is publicly accessible to insurance underwriters, freight brokers, shippers, and anyone else with your USDOT number. There is no opt-out from this public visibility, and carriers receive no notification when someone checks their profile.

Does my CSA score affect my drivers individually?

The CSA percentile score is primarily a carrier metric tied to your USDOT number. Individual driver violation records are tracked separately in the Driver Safety Measurement System and are visible to prospective employers through the Pre-Employment Screening Program. A driver’s citations contribute to your carrier’s score and to their own individual record at the same time.

Does a clean inspection improve my score?

A clean inspection does not add positive points, but it improves your standing by increasing your inspection count without adding violations. Because your percentile compares your weighted violations against carriers with a similar inspection volume, a higher inspection count with no new violations generally improves your comparative ranking over time.

How long does a violation stay on my record?

Violations remain in the 24-month rolling SMS window from the date of the inspection. After 24 months, the violation exits the calculation entirely. The full inspection record remains in the Motor Carrier Management Information System as a historical record even after it leaves the scoring window.

ELD, HOS, and Score Management

How do ELD violations feed my CSA score?

ELD violations, including operating without a registered ELD under 49 CFR 395.22(a) and failing to maintain accurate records of duty status under 49 CFR 395.8(a)(1), feed directly into your HOS Compliance BASIC. Because HOS Compliance carries a 65 percent intervention threshold and is one of the three highest-scrutiny categories, violations here create significant enforcement exposure. Accurate, engine-connected ELD records are your primary protection at every roadside inspection.

What happens if my ELD device gets removed from the FMCSA registered list?

FMCSA gives carriers up to 60 days from the removal announcement to replace the device. During that window, per FMCSA’s own guidance for the May 2026 removal batch, officers are directed not to cite drivers solely for using the removed device. After the grace period closes, using the device is treated as operating without an ELD, and the driver can be cited under 49 CFR 395.8(a)(1) and placed out of service under CVSA’s Out-of-Service Criteria. That citation enters the HOS Compliance BASIC immediately. Checking the FMCSA registered ELD list regularly is the most direct way to confirm your device is still registered.

Can I dispute a roadside inspection violation I believe is wrong?

Yes. Carriers and drivers can file a Request for Data Review through the FMCSA DataQs system to challenge violations recorded incorrectly, assigned to the wrong carrier, or based on a factual error. If the review determines the record was wrong, the violation is adjusted or removed from your SMS profile, which improves your percentile directly. Filing promptly while inspection records are recent gives the dispute the clearest basis for resolution.

What is the difference between a warning letter and a compliance review?

A warning letter notifies your carrier that a percentile has crossed a threshold and requests a corrective action plan. A compliance review is a formal investigation where FMCSA auditors examine your driver qualification files, HOS records, vehicle maintenance documentation, drug and alcohol program records, and accident register either remotely or on-site. A compliance review produces a safety fitness rating, and an Unsatisfactory rating can affect your operating authority.

Does the 2026 SMS overhaul change what I need to do operationally?

The overhaul changes how violations are grouped and how some categories are structured, but the behaviors that produce citations have not changed. Accurate ELD records, completed DVIRs, current driver qualification files, and genuine pre-trip inspections remain the foundation of a low CSA score under any version of the methodology. The new Vehicle Maintenance Driver Observed category adds a direct scoring benefit for fleets with documented inspection habits that was not available before 2026.

How does a high HOS Compliance score change what happens at roadside?

Carriers with elevated HOS Compliance percentiles are prioritized for targeted inspections. Officers use SMS data to decide which trucks to examine more closely at a given stop. A carrier above the HOS Compliance threshold is more likely to get pulled, more likely to have their ELD records examined in detail, and more likely to receive additional citations if those records contain any irregularity. The FMCSA HOS regulations govern what officers are checking against during that review.

Can a small fleet or owner-operator improve their CSA score?

Yes. The percentile comparison is made against carriers with a similar inspection volume, which adjusts for fleet size meaningfully. A one-truck operation is not ranked against a 200-truck fleet. The time-weighting mechanism works the same way regardless of fleet size, and 90 days of clean inspections moves the percentile down for any carrier. For owner-operators, where every citation lands on both the driver record and the carrier SMS profile simultaneously, accurate daily logs and a registered, functioning ELD carry particular importance. Our guide on ELD requirements for owner-operators explains how those obligations work in practice.

Conclusion

Your CSA score updates every month whether you are checking it or not. FMCSA, insurance underwriters, and freight brokers are drawing conclusions from it on a regular basis, and those conclusions shape your enforcement exposure, your premium at renewal, and your access to loads. The carriers managing their score well are not doing anything complicated. They check the score monthly, review new inspection records without delay, keep their ELD devices on the registered list, and treat a rising percentile as a signal to act rather than a problem to revisit later.

The 2026 SMS overhaul introduced a new scored category for pre-trip inspection quality, consolidated violation codes to reduce volatility, and shifted several thresholds. None of those changes alter the underlying compliance behaviors that keep a score clean. Accurate logs, completed inspections, current driver files, and a registered ELD remain the practical foundation under any version of the methodology.

We built Geosavi Compliance Now as an FMCSA-registered ELD that produces the accurate, engine-connected records your HOS Compliance BASIC depends on at every inspection stop. If you want to talk through your fleet’s current compliance position or see how the platform fits your operation, schedule a call with our team or reach us at (800) 261-4361.