How are aircraft assessed?

Aircrafts are assessed based on year, make, model number, and hours flown the previous year. We use the spring issue of the Aircraft Bluebook per the State of Missouri.

When will my aircraft be considered historic?

Aircraft is considered historic when it is 25 years or older and flown under 50 hours in a year.

My aircraft was a kit plane. How is that assessed?

Kit planes are always assessed at the historic aircraft percentage based on the purchase price of the kit, purchase amount for additional parts, and number of labor hours.

My aircraft is in parts, do I still need to claim it?

Yes, the aircraft will still need to be assessed even if it is in parts. It will be assessed at the historic percentage based on total purchase amount.

How do I get my aircraft assessed by the State Tax Commission?

Aircraft is eligible to be assessed by the State of Missouri if it is used for commercial purposes and has a gross take off weight of over 3,000 pounds.

If your aircraft meets those standards, you can learn more here: STC website

If you choose to have your aircraft assessed by the state, you will need to make sure to inform Clay County.

contact us

Cathy Rinehart
Clay County Assessor

Clay County Courthouse
1 Courthouse Square
Liberty, Missouri 64068

phone: (816) 407-3500
fax: (816) 407-3501

Office Hours


Clay County Courthouse Annex
1901 NE 48th St
Kansas City, Missouri 64118

phone: (816) 407-3470
fax: (816) 407-3461
business: (816) 407-3460

Office Hours


234 W. Shrader St, Suite D
Liberty, Missouri 64068

phone: (816) 407-3370
fax: (816) 407-3371

Office Hours