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.

Income Tax Year 2015

Individual and Corporate Statistics of Income for 2015 (PDF)

Note: Updates were made to the 2015 SOI to improve the accuracy of the reporting which may limit comparability of the data to prior years’ publications. Additional information is available in the PDF (such as Introductions, 2013-to-2015 Table Crosswalks, Data Glossaries, and Publication Changes).

Individual Statistics of Income Tables (Excel)

Individual Statistics of Income

Region 1. Logan, Morgan, Phillips, Sedgwick, Washington, and Yuma counties
Region 2. Larimer and Weld counties
Region 3. Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver, Douglas, Gilpin, and Jefferson counties
Region 4. El Paso, Park, and Teller counties
Region 5. Cheyenne, Elbert, Kit Carson, and Lincoln counties
Region 6. Baca, Bent, Crowley, Kiowa, Otero, and Prowers counties
Region 7. Pueblo county
Region 8. Alamosa, Conejos, Costilla, Mineral, Rio Grande, and Saguache counties
Region 9. Archuleta, Dolores, La Plata, Montezuma, and San Juan counties
Region 10. Delta, Gunnison, Hinsdale, Montrose, Ouray, and San Miguel counties
Region 11. Garfield, Mesa, Moffat, Rio Blanco, and Routt counties
Region 12. Eagle, Grand, Jackson, Pitkin, and Summit counties
Region 13. Chaffee, Custer, Fremont, and Lake counties
Region 14. Huerfano and Las Animas counties

Table 17. Income and Tax Data by County
Table 18. Income and Tax Data for Major Counties by Size of Federal AGI (Adams, Arapahoe, Boulder, Denver, Douglas, El Paso, Jefferson, Larimer, Mesa, Pueblo, Weld)
Table 19. Colorado Income and Tax Data by Size of Colorado Taxable Income in $10,000 Increments

Table 19 Supplement. Colorado Income and Tax Data by Size of Colorado Taxable Income in $10,000 Increments
This supplemental table to the Individual SOI summarizes all of the returns that were included in SOI and all Colorado income tax returns that were excluded from the SOI data set– either because the returns were not full-year residents or because they did not match up to an IRS return in the data merging process. This information is provided to help the data users apply their own weighting methodologies if needed.