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Colorado Department of Revenue
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2018 Individual Statistics of Income
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Table 16. Income and Tax Data by Size of Federal AGI and Standard/Itemized Deduction Returns 1
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This table summarizes standard and itemized deduction returns filed by full-year residents. Federal AGI and Colorado net tax are summarized for each category.
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I. Number of Returns, Income, and Tax Data
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 Standard Deduction Returns Itemized Deduction Returns
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Size of Federal AGI Number of Returns Federal AGI Colorado
Net Tax 		Number of Returns Federal AGI Colorado
Net Tax
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Negative IncomeNANANANANANA
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$ 0 to $ 9,999262,409$1,370,797,076 $1,569,744 3,849$19,643,649 $136,119
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$ 10,000 to $ 19,999278,656$4,149,545,545 $25,452,494 5,724$87,553,585 $440,292
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$ 20,000 to $ 29,999267,414$6,680,282,901 $112,692,487 7,211$181,997,269 $1,672,789
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$ 30,000 to $ 39,999242,161$8,436,169,935 $195,009,263 9,293$327,103,317 $4,807,892
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$ 40,000 to $ 49,999195,157$8,741,536,703 $230,656,544 12,749$576,483,169 $11,756,431
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$ 50,000 to $ 59,999153,120$8,389,786,462 $234,072,592 16,180$892,535,357 $22,067,569
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$ 60,000 to $ 74,999172,972$11,601,303,668 $333,306,856 27,637$1,867,897,095 $52,131,794
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$ 75,000 to $ 99,999196,814$17,042,825,024 $511,776,556 43,609$3,797,174,070 $115,802,367
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$ 100,000 to $ 199,999277,136$37,242,510,375 $1,254,771,890 113,660$16,356,290,966 $559,390,352
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$ 200,000 to $ 499,99963,608$17,636,825,790 $666,540,323 74,153$21,741,268,980 $808,154,252
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$ 500,000 to $ 999,9996,520$4,320,860,463 $171,490,570 13,980$9,434,676,227 $351,522,781
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$ 1,000,000 and over2,214$4,644,055,325 $186,451,744 7,719$25,913,007,863 $914,964,213
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Total2,118,181$130,256,499,267 $3,923,791,063 335,764$81,195,631,547 $2,842,846,851
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II. Average Dollar Amounts per Return
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 Standard Deduction Returns Itemized Deduction Returns
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Size of Federal AGI Federal AGI Colorado
Net Tax 		Federal AGI Colorado
Net Tax
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Negative IncomeNANANANA
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$ 0 to $ 9,999$5,224 $6 $5,104 $35
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$ 10,000 to $ 19,999$14,891 $91 $15,296 $77
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$ 20,000 to $ 29,999$24,981 $421 $25,239 $232
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$ 30,000 to $ 39,999$34,837 $805 $35,199 $517
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$ 40,000 to $ 49,999$44,792 $1,182 $45,218 $922
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$ 50,000 to $ 59,999$54,792 $1,529 $55,163 $1,364
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$ 60,000 to $ 74,999$67,070 $1,927 $67,587 $1,886
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$ 75,000 to $ 99,999$86,594 $2,600 $87,073 $2,655
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$ 100,000 to $ 199,999$134,384 $4,528 $143,905 $4,922
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$ 200,000 to $ 499,999$277,274 $10,479 $293,195 $10,898
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$ 500,000 to $ 999,999$662,709 $26,302 $674,870 $25,145
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$ 1,000,000 and over$2,097,586 $84,215 $3,357,042 $118,534
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Average$61,495 $1,852 $241,824 $8,467
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Source: Federal and Colorado individual income tax returns (full-year residents only)
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NA - Not applicable
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1 Returns reporting itemized deductions on Schedule A are assumed to be using itemized deductions to reduce their taxable income, and are therefore categorized as Itemized Deduction Returns. All other returns are categorized as Standard Deduction Returns. Taxpayers with zero or negative AGI are not categorized as Standard or Itemized because their taxable income cannot be reduced further.
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Prepared by: Office of Research and Analysis, Colorado Department of Revenue | dor_ora@state.co.us
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Data extracted: August 20, 2020
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Publish date: November 2021
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