Statistics of Income

The Colorado Statistics of Income (SOI) is a complement to the IRS’s Statistics of Income with Colorado specific income tax details. The SOI reports tabulate Colorado income tax return data by income tax year and size of income and report on a variety of income information available.
 
The data used in the Individual SOI reports are drawn from a merged file of state and federal tax returns. The SOI reports for the most current income tax year are published with a three year lag due to the availability and release of federal income tax data. The timeline given below shows an example of the release of data to develop the reports.

Timeline for 2015 Individual Statistics of Income compilation:

Date

Statistics of Income Processing Activity

April 2016

2015 federal and Colorado individual income tax returns are filed by most taxpayers.

October 2016

2015 returns are filed by most of the remaining individual taxpayers who filed for extensions.

August 2017

IRS extracts 2015 federal individual income tax return data. This extract contains on time, extension, late, amended, and corrected 2015 individual income tax return data.

September - November 2017

IRS sends the extract of 2015 individual federal income tax return information to the states.

May 2018

Department staff begin matching and compiling federal and Colorado individual income tax filing data after legislative session closes.

December 2018

2015 Individual Statistics of Income is completed and published by DOR.

Additionally, the SOI reports are also included in the biennial Colorado Tax Profile & Expenditure Report, as required by §39-21-303, C.R.S.

 
Contact Us for more detailed requests.