When do I have to renew the license plate/tag?

This depends on the state your license plate is from. You can find a list of states below with the renewal dates.

South Dakota

If registered in a person's name, the renewal month is based on the first letter of your last name as shown here.

If registered in a business name, the registration expires 12 months from the month in which it was first registered.

Vermont

The registration expires 12 months from the month in which it was first registered.

Montana

If your vehicle is a motorcycle, ATV, UTV, jet ski, or automobile 11 years old or older, you will get a permanent plate. Otherwise, the registration expires 12 months from the month in which it was first registered. You must renew your registration by the end of the following month, which is indicated on the registration decal on the rear license plate.

Arizona

The registration expires 12 months from the month in which it was first registered.

Utah

The registration expires 12 months from the month in which it was first registered.