CDL Hours of Service Rules Explained (Plus What Violations Cost)

CDL hours of service (HOS) rules limit how long a commercial driver can be behind the wheel before taking a break. The core numbers: 11 hours of driving after 10 consecutive hours off duty, a 14-hour window to get that driving done, a 30-minute break required after 8 hours of driving, and a 60/70-hour cap over 7 or 8 days that resets with a 34-hour restart. These are federal rules under 49 CFR Part 395, and they apply the same way whether you run Texas to Oklahoma or Ohio to Michigan. You can confirm the exact language anytime at fmcsa.dot.gov.

Most articles stop there. But if you're searching this phrase, you're probably not trying to memorize a rulebook. You want to know what happens to your wallet if you get it wrong, and what you can actually do about it. That's what this post covers.

What are the CDL hours of service rules, in plain terms?

The rules boil down to five numbers you need to know cold: 11 hours driving, 14-hour on-duty window, 30-minute break after 8 hours, 60 hours over 7 days (or 70 over 8), and a 34-hour restart to reset the weekly clock. There are exceptions for short-haul drivers and adverse driving conditions, and the rules interact with your ELD data automatically, so there's no gray area on the enforcement side.

What are the sleeper-berth split and short-haul exceptions?

Two details trip up a lot of drivers who otherwise know the basics:

• Sleeper-berth split: drivers can split their required 10-hour off-duty period into two periods, as long as one is at least 7 consecutive hours in the sleeper berth and the other is at least 2 consecutive hours off duty (either resting or in the sleeper berth). Neither period counts against the 14-hour driving window while it's in progress, which is the main reason teams and long-haul solo drivers use it.
• Short-haul exemption: drivers who operate within a 150 air-mile radius of their normal work reporting location and return to that location within 14 hours (or in some cases 16 hours, twice a week) can skip the RODS logging requirement and don't need an ELD for those days. This is common for local box truck and hotshot runs that never leave a home region.

If you're new to trucking or just got your CDL, it's worth also understanding the physical and licensing side of compliance. We've covered CDL physical requirements and what a CDL actually costs to obtain in separate posts if you need that background.

What does an HOS violation actually cost you?

An HOS violation costs you in three separate ways: a direct civil penalty, a CSA score hit that follows your DOT number, and downtime while you're placed out of service. This section is informational, not legal advice; if you're facing an active enforcement action, talk to an attorney or your safety consultant about your specific case. As of 2026, FMCSA civil penalties for hours of service violations can run from roughly $1,000 on the low end up to more than $19,000 per violation for carriers on egregious or repeat offenses, adjusted annually for inflation under federal penalty rules. Confirm the current figures with eCFR, Appendix B to 49 CFR Part 386 or your state DOI before assuming a specific number applies to your situation, since penalty tables get updated and enforcement varies by state.

All figures above are the current federal maximums under FMCSA's inflation-adjusted penalty schedule, per eCFR, Appendix B to 49 CFR Part 386 (current as of early 2026). Federal law does not set separate dollar bands for each violation subtype; penalties scale by severity within these ceilings rather than by fixed subtype. Actual amounts assessed depend on the inspector, the carrier's history, and enforcement discretion, so treat these as planning numbers, not a guarantee. Verify current figures with FMCSA or your state DOI before assuming a specific number applies to your case.

The bigger hidden cost is usually the out-of-service time. If a roadside inspector puts you down for the rest of your available hours, that's a full day of lost revenue on top of whatever the ticket runs.

How does an HOS violation affect your insurance premium?

A pattern of HOS violations raises your CSA score, and underwriters price commercial auto liability partly off that score, so repeated violations tend to push your premium up at renewal rather than causing an immediate spike. It's less about one bad inspection and more about the trend line an underwriter sees when they pull your safety record.

Here's something most drivers never think about until it bites them: keeping your authority active matters just as much as keeping your logs clean. Trucker Path Insurance analyzed filings from across the country's FMCSA database, tracking 47,234 insurance cancellation filings between April 6, 2026 and May 25, 2026. Of those, 93% were primary liability cancellations (Form BMC-91X), 5.3% were surety bonds (Form BMC-84), and 0.7% were cargo coverage (Form BMC-34). In other words, losing your primary liability filing, often from a missed payment or a lapsed policy, is by far the most common way a carrier's authority gets flagged, more common than any single HOS issue. If you're stacking HOS compliance risk on top of a shaky insurance filing, you're compounding exposure that doesn't need to be there. Reviewing your coverage options and making sure your filing stays current is a cheap way to remove one entire category of risk.

What can you actually change to lower these costs?

The three biggest levers are your ELD setup, your dispatch scheduling, and how you plan restarts. An ELD that's configured correctly and synced properly prevents the most common violation type: logging errors that read as false logs. Dispatchers who route loads with realistic drive times instead of squeezing every last mile out of your 14-hour window keep you from getting forced into a violation just to make a delivery window. And planning your 34-hour restart around actual freight demand, rather than taking it reactively when you're out of hours, keeps your weekly average lower and your CSA score cleaner.

None of this requires new equipment or a big investment. It's mostly about building slack into your schedule so one traffic jam or one late load doesn't force a choice between missing a delivery and breaking a federal rule.