What Is CSA?
CSA (Compliance, Safety, Accountability) is FMCSA’s system for measuring motor carrier safety. It collects data from roadside inspections, crash reports, and investigations, then assigns scores across seven safety categories called BASICs.
Think of it as a credit score for trucking safety. High scores are bad (more violations), and they affect everything from insurance premiums to whether brokers will work with you.
Score Range 0-100 (percentile)
Higher = Worse You’re compared to similar carriers
Data Window 24 months of data
Updated Monthly by FMCSA
The 7 BASICs Explained
Each BASIC measures a different safety dimension. Not all are publicly visible — some are only shown to the carrier and FMCSA.
1
Unsafe Driving
Threshold: 65%
What it measures: Dangerous driving behaviors recorded during inspections or from crash reports.
Violations that count:
- Speeding (including 15+ over)
- Reckless/careless driving
- Following too closely
- Improper lane change
- Failure to use seatbelt
- Using a handheld phone while driving
Publicly visible. Directly affects insurance rates.
2
Hours of Service (HOS) Compliance
Threshold: 65%
What it measures: Violations related to HOS rules, ELD requirements, and fatigue management.
Violations that count:
- Driving beyond 11-hour limit
- Exceeding 14-hour window
- Insufficient 30-minute break
- Falsifying logs/ELD records
- No ELD or malfunctioning ELD
- Operating after being placed OOS for HOS
Publicly visible. High correlation with crash risk — insurers watch this closely.
3
Driver Fitness
Threshold: 80%
What it measures: Whether drivers are properly licensed and medically qualified.
Violations that count:
- No valid CDL or wrong class
- Expired or no medical certificate
- No CDL endorsement for cargo type
- Operating without valid authority
Publicly visible. Easy to fix — keep documents current.
4
Controlled Substances & Alcohol
Threshold: 80%
What it measures: Drug and alcohol violations.
Violations that count:
- Positive drug or alcohol test
- Possession of controlled substance
- Operating under the influence
- Refusal to submit to testing
NOT publicly visible. Only carrier and FMCSA see these scores. But any positive test is career-altering.
5
Vehicle Maintenance
Threshold: 80%
What it measures: Vehicle condition violations from inspections.
Violations that count:
- Brake adjustment/components
- Tire tread depth/condition
- Lights and reflectors
- Frame, suspension, steering
- Coupling devices
- Exhaust and fuel systems
Publicly visible. The most common violations — brake issues dominate this category.
6
Hazmat Compliance
Threshold: 80%
What it measures: Violations related to hazardous materials transport (only applies to hazmat carriers).
Violations that count:
- Missing or incorrect placards
- Shipping papers not accessible
- No emergency response information
- Improper packaging or containment
Publicly visible. Only scored for carriers that transport hazmat.
7
Crash Indicator
Threshold: 65%
What it measures: Crash involvement based on state-reported crash data.
What counts:
- All DOT-reportable crashes (fatality, injury, or tow-away)
- Crashes count regardless of fault
- Severity is weighted (fatal > injury > tow-away)
NOT publicly visible. But insurance underwriters see crash data from other sources.
How Scores Are Actually Calculated
CSA scoring is more complex than most drivers realize. Understanding the mechanics helps you game the system — legally.
1
Violation severity points
Each violation has a severity weight from 1-10. Brake violations score 5-8. Speeding scores 4-7. Expired med card scores 4. More serious = more points.
2
Time weighting
Recent violations count more. Violations in the last 6 months are weighted at 3x. 6-12 months ago: 2x. 12-24 months ago: 1x. This means a 2-year-old violation has 1/3 the impact of a fresh one.
3
Normalized by inspections
Your total violation points are divided by the number of relevant inspections. More clean inspections = lower score. This is why some carriers encourage weigh-station visits — a clean inspection dilutes your score.
4
Compared to peer group
Your normalized score is ranked against carriers of similar size and type. The result is a percentile: 85% means you’re worse than 85% of similar carriers. Lower is better.
The Clean Inspection Strategy
Because scores are normalized by inspection count, clean inspections actively lower your score. Some carriers instruct drivers to pull into weigh stations (instead of using PrePass to bypass) specifically to accumulate clean inspections. A truck that passes 10 inspections with 1 violation scores much better than a truck that passes 2 inspections with 1 violation — even though they have the same number of violations.
What Happens When You Exceed Thresholds
| Score Level | What Happens | Action Required |
|---|---|---|
| Below Threshold | No FMCSA action. Normal operations. | Keep it up. Monitor monthly. |
| At Threshold | Warning Letter from FMCSA. | Review violations. Implement corrective action. Document everything. |
| Above Threshold | Investigation — FMCSA may conduct a focused or comprehensive review. | Proactive improvement plan. Fix root causes. Consider hiring a compliance consultant. |
| Persistent Above | Proposed Unsat Rating or targeted enforcement. | Immediate corrective action. Unsatisfactory rating can shut your operation down. |
The thresholds vary by BASIC: 65% for Unsafe Driving, HOS, and Crash Indicator; 80% for Vehicle Maintenance, Driver Fitness, Controlled Substances, and Hazmat. These are percentile thresholds — not absolute scores. A 65% threshold means you’re in the worst 35% of carriers in that category.
How CSA Scores Affect Your Insurance
This is where CSA scores hit your wallet — hard. Insurance underwriters check your scores before quoting or renewing.
Premium Impact
Clean BASICs (all below threshold)Best rates available
1 BASIC above threshold10-25% surcharge
2+ BASICs above threshold25-50% surcharge
Unsafe Driving above threshold30-50% surcharge (worst one)
Active Warning Letter/InvestigationSome insurers won’t quote at all
Beyond Insurance
- Brokers check CSA — many won’t book loads with carriers above thresholds
- Shippers check CSA — major shippers have CSA requirements in contracts
- Lease-on carriers check CSA — your scores affect whether you can lease to a carrier
- Banks check CSA — some lenders factor safety scores into truck financing decisions
- New authority applications — FMCSA reviews scores during the new-entrant period
The Insurance Renewal Meeting
When your policy is up for renewal, your underwriter pulls your SMS (Safety Measurement System) data. They see every BASIC score, every violation detail, every crash report. If your Vehicle Maintenance BASIC went from 40% to 75% since last renewal, expect questions — and a rate increase. Conversely, if you dropped from 70% to 30%, that’s leverage for a better rate. Know your scores before your underwriter does.
How to Improve Your Scores
Immediate Actions
- DataQs challenges — review every violation. Challenge incorrect ones through dataqs.fmcsa.dot.gov. Success rate varies but even 1 removed violation helps.
- Fix root causes — if brakes keep failing, fix the maintenance program. Symptoms repeat until you fix the system.
- Driver training — safety meeting documented with sign-in sheets. Shows FMCSA you’re taking action.
- Pre-trip discipline — rigorous pre-trip inspections catch violations before inspectors do.
Strategic Actions
- Accumulate clean inspections — don’t bypass weigh stations. Clean inspections dilute your score.
- Wait for time decay — violations lose weight over time (3x → 2x → 1x over 24 months). Sometimes patience is the best strategy.
- Target worst BASICs first — focus improvement on the category closest to or above threshold.
- Preventive maintenance program — documented PM schedule reduces Vehicle Maintenance violations dramatically.
What NOT to Do
- Don’t ignore Warning Letters — they escalate to investigations if unaddressed
- Don’t retaliate against drivers for violations — creates legal liability and doesn’t fix the problem
- Don’t avoid inspections — it looks suspicious and you miss clean inspection opportunities
- Don’t pay a “CSA score fixer” — scam companies promise to clean your scores. Only DataQs and time actually work.
Where to Check Your Scores
FMCSA SMS Portal
ai.fmcsa.dot.gov — The official source. Enter your DOT number to see publicly visible BASIC scores. Create a carrier account (PIN required) to see all 7 BASICs including Crash Indicator and Controlled Substances.
SAFER System
safer.fmcsa.dot.gov — Shows your company snapshot, operating authority, and inspection/crash history. Less detail than SMS but useful for a quick overview.
ISS Score
Your Inspection Selection System score (1-100) determines how likely you are to be pulled in for inspection at weigh stations. Higher = more inspections. Check through your carrier account in the SMS portal.
Monthly Review Habit
Check your SMS portal on the 1st of every month. Scores update monthly. Catch new violations early — you have 90 days to file a DataQs challenge from the date of the inspection. Set a calendar reminder.
Frequently Asked Questions
Do owner-operators have their own CSA scores?
CSA scores are assigned to the motor carrier (DOT number), not individual drivers. If you’re an O/O with your own authority (your own DOT number), then yes — you have your own scores. If you’re leased to a carrier, violations go on the carrier’s record, not yours personally. However, your personal inspection history is tracked in the Pre-Employment Screening Program (PSP) — carriers check this before hiring you.
How long do violations affect my CSA scores?
Violations remain in the CSA system for 24 months from the inspection date. They’re time-weighted: 0-6 months = 3x weight, 6-12 months = 2x weight, 12-24 months = 1x weight. After 24 months, they drop off your BASIC calculations entirely. The inspection record itself stays in the FMCSA database permanently, but it no longer affects your active scores after 24 months.
Can I see which specific violations are driving my scores?
Yes. Log into the SMS portal (ai.fmcsa.dot.gov) with your carrier PIN. Click on any BASIC to see the individual inspections and violations contributing to that score, including severity weights and time multipliers. This is exactly what your insurance underwriter sees. Use this data to identify patterns — if brake adjustment violations appear repeatedly, that’s your maintenance program failing, not bad luck.
My scores are high because of one bad inspection — will it go away?
Yes, eventually. A single inspection with multiple violations can spike your scores, especially for small carriers (fewer total inspections = each one counts more). The time decay helps: after 6 months, the weight drops from 3x to 2x. After 12 months, it drops to 1x. After 24 months, it drops off entirely. Meanwhile, clean inspections actively dilute the impact. If you had one bad inspection 6 months ago, getting 3-4 clean inspections will help significantly.
Related Tools
Free Tool CSA Score Checker Look up your CSA BASIC scores and see how they compare to intervention thresholds. Free Tool DOT Audit Self-Check Run through a self-audit to identify compliance gaps before FMCSA finds them. Free Tool Compliance Calendar Never miss a filing deadline with a 12-month compliance calendar for trucking companies.
Worried About How Your CSA Scores Affect Your Rates?
We help carriers understand their scores, build improvement plans, and find insurance markets that look at the whole picture — not just one bad quarter.