FMCSA Biennial Update Due Date Calculator

Part of Authority, Registration & Taxes

Every USDOT number has to be updated every 24 months, and the number itself tells you when. The last digit picks the month, the digit before it picks odd or even years. Type yours in for the exact deadline, the one after it, and how many days you have.

When your next update is due

Pre-filled with a sample number ending in 2-0. Type your own; dates count from today on your device.

Filing month (last digit)
October (0)
Year (next-to-last digit)
Even years (2)
Cycle
Every 24 months
Previous deadline
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Next update due by

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Enter a number to see the dates.

Low-poly render of a stack of blank forms on a desk
The same form, every second year, in the month your number picks.

What it checks

Two digits and a calendar. The last digit maps to a month, with 0 standing in for October. The next-to-last digit decides the year: odd files in odd-numbered years, even (0 included) in even-numbered ones. The tool then finds the first matching month-end on or after today and adds 24 months for the one after.

The date comes from your own device, so the answer is right on the day you open it. A deadline day that is already over rolls forward two years. If you have just applied, the USDOT number guide covers the application itself; this page is only about keeping the number alive afterwards.

Worked example

Four sample numbers. Notice the last one: a six-digit number works the same way, and its January 2026 deadline has already passed, so its next one is in 2028.

USDOTLast two digitsMonthYears due, from 2026
31058202, 0October2026, 2028, 2030
28473161, 6June2027, 2029, 2031
14500939, 3March2027, 2029, 2031
9055414, 1January2026, 2028, 2030

Is it being enforced right now?

As of October 18, 2026: the UCR Plan's September 2026 newsletter reports that FMCSA has temporarily suspended enforcement of the biennial update, and the deactivation that goes with it, for updates due on or after June 1, 2026, while registration moves to its new MOTUS system. Those registrants get extra time to file, and FMCSA says it will give notice before enforcement resumes. The rule in the CFR has not changed, so the due dates above still stand.

Keep the update honest either way. The power-unit count on your latest MCS-150 is the count UCR uses when it auto-renews a registration, so a stale form can put you in the wrong bracket; check yours on the UCR fee calculator. The schedule is keyed to the USDOT number even when you also hold operating authority; the USDOT vs MC number comparison explains which number does what.

The rule it comes from

49 CFR §390.19T(b)(2) sets the 24-month cycle and the digit-to-month table; §390.19T(b)(3) sets the odd and even years; §390.19T(b)(4) makes a missed update subject to the penalties in 49 U.S.C. 521(b)(2)(B) or 14901(a) and to deactivation of the USDOT number. The recordkeeping and reporting tier in appendix B to part 386 currently runs to $1,584 a day, up to $15,846. The same schedule appears in §390.19 and §390.201(d)(3), both marked suspended in the current eCFR; the "T" section is the one in force.

Sources

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