MCS-150 Update Deadlines and Filing Guide
Stay off the DOT out-of-service list by filing your MCS-150 on time and with the right data.
Biennial Update Schedule
Your update month is determined by the last digit of your USDOT number and must be filed every two years.
Failure to update can lead to fines up to $1,000 per day and deactivation of your DOT number.
Information Required
Total mileage from the prior year, number of power units and drivers, hazardous materials details if applicable.
Operating authority status and insurance information must match what FMCSA has on file.
Filing Options
File online through the FMCSA portal for the fastest confirmation, or mail a paper form if you have portal issues.
Keep the confirmation page as proof—inspectors may request it during compliance reviews.
Frequently Asked Questions
Do private carriers need biennial updates?
Yes. Every entity with an active USDOT number must update on the assigned schedule.
What if I miss my month?
File immediately. FMCSA often reinstates numbers once the update is completed, but fines remain possible.