How Long Do CSA Violations Stay on Your Record?

A lot of carriers think the 24-month window means they just need to wait it out. Sometimes that is true. But if you have a cluster of violations from six to nine months ago and you have not changed anything operationally, you are going to get another cluster in the next six to nine months. Time erases old violations. It does not fix the operation that created them.

The 24-month rolling window: how FMCSA counts violations

FMCSA's Safety Measurement System uses a 24-month rolling window. Every inspection with a violation is weighted based on severity, time, and inspection type.

Here is how the time weighting works:

• Months 1 to 6: highest time weight. A violation from last month counts more heavily than one from 18 months ago.
• Months 7 to 12: slightly lower time weight, but still in the top half of the weighting range.
• Months 13 to 24: lowest time weight. The violation is still in your record, but its contribution to your BASIC percentile is reduced significantly.
• Month 25 onward: the violation drops off entirely. No action required on your part.

This rolling window means your BASIC percentile is always a snapshot of the most recent 24 months. A carrier with mostly older violations will see their score improve over time as those violations shift into the lower-weight periods and eventually age off. A carrier that keeps adding new violations resets the clock on those newer entries.

The BASIC percentile calculation also factors in inspection frequency. A carrier with 5 inspections and 3 violations looks different than a carrier with 20 inspections and 3 violations. More inspections (especially clean ones) change the denominator.

How violation weight changes at the 12-month mark

At the 12-month mark, FMCSA's SMS applies a 50 percent weight reduction to violations. This is a meaningful shift for carriers with older violations.

But it is important to understand what this does and does not do.

What it does: a violation that was contributing, say, 10 points to your BASIC calculation now contributes closer to 5 points. If you had several violations all hitting the 12-month mark around the same time, you may see a noticeable drop in your percentile during that period.

What it does not do: it does not reset your percentile to zero. It does not remove you from comparison against peer carriers. If the violation was high-severity (a brake-out-of-service condition, for example), it still counts at half its original weight for another 12 months. High-severity violations at full weight for 12 months, then half weight for another 12 months, still add up.

This is why carriers who are waiting for the 12-month mark to "fix" their scores are only getting half the relief they expect. The violation is still there. It is just less heavy.

The maximum civil penalty for an HOS violation can reach $19,246. A vehicle placed out of service can trigger penalties up to $23,048 per violation. These do not disappear from your operational reality because the SMS weight shifted. They sit in your record for the full 24 months regardless.

What DataQs challenges can do that waiting cannot

DataQs is FMCSA's Data Quality system. It allows carriers and drivers to challenge inspection records that contain factual errors. Unlike waiting for violations to age off, a successful DataQs challenge removes the violation from your SMS record immediately.

Valid grounds for a DataQs challenge:

• The violation code cited does not match the regulation that actually applies.
• The inspection was attributed to the wrong carrier (your DOT number is on a record that belongs to another operation).
• A violation was dismissed in court or by a state agency after the roadside stop.
• The inspection data contains factual errors in what was recorded.

Not valid for DataQs:

• "My driver disagrees with what the officer observed." Judgment calls made at the roadside stop are not DataQs issues.
• "We did not think the regulation applied to us." Regulatory interpretation disputes go through different channels.

When a DataQs challenge succeeds, the violation is gone. It does not count at partial weight. It does not reappear when the original inspection date hits the 24-month mark. It is removed.

That is the key difference between DataQs and waiting. Waiting reduces the weight of a violation over time. DataQs removes it entirely if the data is actually wrong.

Most carriers I work with have at least one or two violations in their SMS record that are technically challengeable. Wrong codes, dismissed violations still showing, data attributed to the wrong carrier. These are worth filing. The process is free and faster than 24 months.

Clean inspections: why they matter more than calendar time

Clean inspections do not remove old violations. But they improve your BASIC percentile calculation by increasing the total inspection count in your record.

FMCSA's SMS uses a relative scoring method. Your BASIC percentile reflects how you compare to other carriers with a similar number of inspections. A carrier with 10 inspections and 2 violations is scored differently than a carrier with 20 inspections and 2 violations. The carrier with more inspections, same violations, looks better in the calculation because the violation rate is lower.

The most impactful clean inspections are Level I. A Level I (full driver and vehicle inspection) carries more weight in the calculation than a Level II (driver-only or walk-around). If your trucks are being inspected frequently, you want those inspections to come back clean.

This is why pre-trip discipline matters beyond just daily compliance. A driver who catches a brake defect before the roadside officer does is not just avoiding an out-of-service order. That driver is protecting the BASIC percentile for the whole fleet.

Crash Indicator: how preventable vs. non-preventable affects the record

The Crash Indicator BASIC tracks crash data, not violation codes from inspections. It uses the same 24-month rolling window.

Here is the important distinction: a crash flagged as "non-preventable" through a DataQs challenge can be excluded from the Crash Indicator calculation entirely. That is different from how violation challenges work. With violations, a successful DataQs removes the data error. With crash data, a successful non-preventable determination can remove the crash from the BASIC calculation even if the crash itself is accurate.

Not all crashes qualify. A carrier that was rear-ended while fully stopped has a strong argument for non-preventable. A single-vehicle rollover is harder. The evidence matters: accident reports, witness statements, photos, and police narrative all support the challenge.

If you have a crash in your Crash Indicator BASIC and you believe the carrier was not at fault, filing a DataQs challenge is worth doing before you decide to just wait it out. A 24-month wait on a crash that qualifies for non-preventable determination is 24 months of unnecessary score impact.

What to focus on when CSA scores are elevated right now

If your BASIC scores are elevated today, here is the practical sequence:

• Pull your SMS data first. Log into ai.fmcsa.dot.gov/SMS and look at the actual inspection records behind your BASICs. Know what is in there before making decisions about what to fix.
• File DataQs on any disputable violations immediately. Do not wait. Every month a challengeable violation sits in your record unchallenged is a month it is counting against you.
• Identify the violation categories driving your highest BASICs. If Unsafe Driving is at 72 and HOS is at 40, your coaching and monitoring resources go toward Unsafe Driving first.
• Add a monthly CSA monitoring review. Most carriers discover violation patterns only when they check their SMS quarterly or when someone mentions it. Monthly review catches new violations before they compound.
• Fix the operation, not just the score. The BASICs are a symptom. If brake violations keep appearing inspection after inspection, the pre-trip process is broken. Fix that. The score follows.

Waiting 24 months is not a compliance strategy. It is a calendar. The carriers who show genuine BASIC improvement do it by changing what caused the violations in the first place. That is a different kind of work, and it is worth starting now.

For a deeper look at how the scores are calculated, see FMCSA safety scores explained. For what happens when scores trigger a compliance review, see DOT audit help.

The Safety Gal's Take

I talk to carriers all the time who think time will fix their CSA problem. And sometimes it does. But if you have a cluster of violations from six to nine months ago, and you have not changed what caused them, you are going to get another cluster in the next six to nine months. Time erases old violations. It does not fix the operation that created them. Those two things are different.

Rhythm Gandhi

Founder, Fleet Regulators | The Safety Gal

Rhythm Gandhi is the founder of Fleet Regulators and is known publicly as The Safety Gal. She writes about practical DOT/FMCSA compliance, audit preparation, HOS, driver files, and fleet safety systems.