If I just need to replace the month tag do you have to wait in line. What is the cost?

You may call the Larimer County Vehicle Licensing office at 970-498-7878, Option 5, to request a replacement month tab. The fee for a new month sticker is $0.11 (yes, eleven cents). The month sticker would then be mailed to you, which may take three to five business days to receive. You may also visit one of our locations in person to purchase this replacement sticker as well. Further information regarding Transactions by Phone or "PhoneTag" can be found at: www.larimer.org/clerk/vehiclelicensing/phonetag

You can't just replace the month tag. You need to pay for the year. There are no partial year registrations. As for the cost, depends on your vehicle type and the year of the vehicle