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How to Determine Your First Used Month
Written by the Consulics HVUT Compliance Team · Reviewed against the IRS Instructions for Form 2290
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e-File Form 2290 NowQuick answer
Your first used month is the month you first put the vehicle on a public highway during the tax period, not the month you bought it. For a truck you run all year that is July, the start of the period. A new truck uses the month you first drove it, and the tax is prorated from there.
The first used month is the month a vehicle first travels on a public highway during the tax period, which runs July 1 through June 30. It belongs on the return and sets your deadline, so it is worth pinning down for each truck.
How to determine it
- 1If the truck was already in service when the period opened, the first used month is July.
- 2If you placed the truck in service later, the first used month is the month you first drove it on a public highway.
- 3Your deadline is the last day of the month after the first used month (for July use, that is August 31).
- 4Enter the first used month on the return for each vehicle.
Why it matters
Carriers sometimes assume every truck is due in August, then miss the real deadline tied to a later first used month. Set the correct month for each unit, and confirm the exact due date with the deadline checker.
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Last reviewed July 30, 2026
This page is general information, not tax, legal, or financial advice. Rules, rates, and procedures change over time and may not fit your situation, so confirm anything you rely on with the IRS or the relevant agency, or with a qualified professional. Consulics does not guarantee this information is complete or current.