In the November 2000 election, Colorado voters passed a Property Tax Exemption for Seniors, known as Referendum A. Qualifying Seniors will see 50 percent of the first $ 200,000 of actual value of their primary residence exempted from property tax. To qualify, at least one owner of a home must be 65 years or older as of January 1, and must have occupied the home as a primary residence for at least 10 consecutive years prior to January 1 of the year he/she applies. The Colorado Assembly reviews annually and has approved funding for the senior citizen property exemption for tax year 2020, payable in 2021.