Publish date: February 14, 2026

How long do HOS violations stay on my score?

Long enough to cost you money. Most HOS violations can influence safety scoring for up to 24 months because FMCSA’s Safety Measurement System (SMS) uses a 24-month lookback window—and it applies time weighting, meaning the newest violations hit the hardest.

And this is where people argue at the truck stop: “Does it hit the driver or the carrier?”

Answer: both. Same inspection, two different impacts. I’m going to break it down clearly so you can stop guessing and start controlling the damage.

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Before you guess, pull your data. Drivers and carriers can check everything here: Check CSA/SMS (carriers) + inspection history (drivers).

How long do HOS violations stay on your score?

Up to 24 months. FMCSA’s SMS uses a 24-month lookback period for roadside inspections and violations when calculating carrier measures and percentiles. But the impact isn’t equal for the full 24 months.

What really happens: the violation “fades” over time because FMCSA applies time weights. The same violation counts more when it’s fresh and less as it gets older.

Official reference: FMCSA: SMS Methodology (Sept 2025)

Next, I’ll show you why the first 6 months is where you feel the punch the most.

Time weighting: why the first 6 months hurts the most

FMCSA applies time weighting so recent safety problems count more than older ones. The SMS time windows are:

0–6 months: highest impact window
6–12 months: medium impact window
12–24 months: lowest impact window

Trucking comparison: it’s like a broker judging you off your last 30 days before they care about what happened two years ago. Recent behavior is treated as “who you are right now.”

Official reference: FMCSA: SMS FAQs (time weights)

Truck stop debate: does an HOS violation hit the driver AND the carrier?

Yes. The same roadside inspection can affect both—just in two different systems:

Carrier impact (CSA/SMS): FMCSA’s Safety Measurement System (SMS) uses roadside inspection violations (including HOS violations) to calculate carrier measures and percentiles using a 24-month window with time weighting. That means an HOS violation can influence the carrier’s SMS results for up to 24 months, with the biggest impact in the most recent time period.
Driver impact (PSP-style inspection history): FMCSA’s Pre-Employment Screening Program (PSP) report includes a driver’s 3-year roadside inspection history. So that same inspection event can also show up on the driver’s inspection history when they apply to a new carrier or go through onboarding.

Why both are true: the roadside inspection creates an official inspection report. FMCSA regulations cover how that inspection report is handled, and FMCSA’s SMS and PSP programs explain how that inspection data is used and displayed for carriers and drivers.

Sources: FMCSA SMS Methodology (24-month window + time weighting) • FMCSA SMS FAQ (24-month use of inspection violations) • FMCSA PSP (3-year inspection history) • 49 CFR § 396.9 (inspection report)

Now that you know who it hits, let’s talk about why small fleets feel like “one ticket ruined my whole year.”

Why small carriers feel like the points never drop off

If you’re running a small fleet, one bad inspection can dominate your profile because your inspection history is thin. FMCSA uses safety event groups to compare carriers with similar event counts, but percentiles can still swing hard when your sample is small.

Plain English: one violation in 3 inspections is a much stronger signal than one violation in 300 inspections.

Pain point reality: that swing can trigger questions from an agent, brokers, shippers, or even internal safety reviews—especially during renewals.

Official reference: FMCSA: SMS Methodology (safety event groups)

Do all HOS violations hit the same?

No. SMS uses severity weights. Some violations carry more weight than others, and then that severity gets multiplied by time weighting.

The real impact is a combo of:

Severity weight (how FMCSA weights the violation)
Time weight (how recent it is)
Exposure (how many total inspections you have)

Why you feel it: a higher-weight HOS hit in the last 0–6 months window can act like a multiplier—especially if you don’t have a lot of clean inspections to balance it out.

Official reference: FMCSA: SMS Methodology (severity + time weighting)

Speeding violations: same 24-month window, different kind of pain

Speeding violations also fall under the SMS time weighting approach and can influence results for up to 24 months. In the real world, speeding often creates faster trust problems because it signals crash risk—so it can show up quickly in underwriting conversations and broker decisions.

Bottom line: treat speeding like HOS—fix the root cause and stack clean history so one hit doesn’t become your reputation.

What to do next: drivers

If you’re a driver, the mission is to protect your inspection history and keep one mistake from becoming a pattern that follows you around.

1) Pull your inspection history and identify the exact violation

Find the inspection date and the exact violation. Once you see what it is, you can fix what caused it.

2) Fix the system that created it

Most repeat HOS issues come from dispatch pressure, poor trip planning, or sloppy log edits. If the system stays the same, the violation repeats—just with a different date.

3) Keep roadside communication clean when logs come up

Short answers and clean log presentation reduces friction during the stop—and friction is where inspections get longer and more expensive.

Next read: DOT English Test: What They Ask

What to do next: carriers

If you’re a carrier, the mission is to protect the company profile so it doesn’t turn into higher premiums, intervention risk, and broker trust issues.

1) Identify what category moved and what inspection caused it

Don’t generalize. Find the inspection that created the movement and the window it’s in (0–6 months is the one that hurts the most).

2) Build clean inspection buffer on purpose

Clean inspections stabilize your profile over time because they increase exposure without adding violations. That reduces how much power a single bad inspection has.

3) Put a weekly HOS and speeding check on autopilot

You don’t need a massive safety department. You need a consistent weekly rhythm: review logs, review speed events, fix repeat patterns, document corrective action.

4) If it’s wrong, dispute it correctly

Bad data left unchallenged becomes “truth” inside the system until it’s corrected.

Next read: How to get a ticket off my CSA record in 2026

Want the systems that keep you inspection-ready and audit-ready? Get access here: Free DOT Compliance Checklist Bundle.

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Sources

Regulatory note: Regulations, enforcement guidance, and scoring methodologies can change. Always verify current requirements using FMCSA sources before making compliance or business decisions.