Annual report pursuant to Section 13 and 15(d)


12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The Company derives substantially all of its revenue from subscriptions to its consumer aviation service, CLEAR Plus. For the years ended December 31, 2021 and 2020, no individual airport accounted for more than 10% of membership revenue.
Revenue by Geography
For the years ended December 31, 2021 and 2020, substantially all of the Company’s revenue was generated in the United States.
Contract liabilities and assets
The Company’s deferred revenue balance primarily relates to amounts received from customers for subscriptions paid in advance of the services being provided that will be earned within the next twelve months. The following table presents changes in the deferred revenue balance as of December 31:
2021 2020 2019
Balance as of January 1 $ 101,542  $ 121,339  $ 77,696 
Deferral of revenue $ 339,064  210,174  233,561 
Recognition of deferred revenue (252,043) (229,971) (189,918)
Balance as of December 31
$ 188,563  $ 101,542  $ 121,339 
The Company has obligations for refunds and other similar items of $2,661 as of December 31, 2021 recorded within accrued liabilities. The Company does not have any material variable consideration obligations.