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The second to last number in your DOT Number determines what year your biennial update needs to be filed. If it’s odd, you’re required to file your MCS-150 in every odd-numbered calendar year. If it’s even, then you file in even-numbered calendar years.Nov
The FMCSA requires all interstate carriers to file a MCS-150 or MCS-150B, if a Safety permit is required, every 24 months based on the last two digits of the US DOT number.

MCS-150 / Bi-Annual / Biennial update is required to be filed every 2 years. Every USDOT has a specific month they have to file and it is based on your DOT number. The last number corresponds with the month and the second to last number corresponds to even or odd years. You are allowed to file the MCS-150 6 months before your due month.

USDOT number ending in: Must file by last day of:

1 – January

2 – February

3 – March

4 – April

5 – May

6 – June

7 – July

8 – August

9 – September

0 – October

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MCS-150 / Biennial Update

Frequently Asked Questions | MCS-150 Form FAQ

About MCS-150 Form

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