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Colorado Department of Revenue
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2020 Individual Statistics of Income
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Table 23C. Income and Tax Data for Boulder County by Size of Federal AGI ¹
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This table shows aggregate income and tax data for full-year residents by major Colorado county (i.e., most populated counties) and AGI group. Mailing addresses are used to categorize returns into a Colorado county. See Table 22 for data on all counties.
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I. Number of Returns and Aggregate Dollar Amounts
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Size of Federal AGI Number
of Returns 		Federal AGI Federal
Taxable Income 		Colorado
Taxable Income ² 		Federal Tax Colorado
Gross Tax ³ 		Colorado
Net Tax
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Negative Income 2,462 ($427,689,579)$0 ($366,716,581)$1,291,692 $124,749 $170,441
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$0 under $10K 17,514 $80,109,456 $2,365,596 ($96,385,611)$1,928,517 $388,822 $386,105
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$10K under $20K 14,116 $209,361,513 $30,560,736 $3,599,206 $6,511,703 $1,974,094 $1,958,504
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$20K under $30K 13,454 $336,429,098 $134,435,433 $112,969,128 $15,901,036 $6,257,226 $6,212,808
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$30K under $40K 13,364 $466,160,316 $256,393,926 $230,019,666 $27,785,962 $11,110,821 $11,045,517
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$40K under $50K 10,931 $490,429,503 $310,103,932 $276,484,246 $33,373,539 $12,961,302 $12,848,247
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$50K under $60K 8,896 $487,898,381 $332,609,208 $290,487,568 $37,273,914 $13,598,321 $13,487,111
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$60K under $75K 10,877 $730,664,524 $522,490,896 $460,975,892 $64,399,468 $21,179,743 $20,995,226
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$75K under $100K 13,636 $1,183,772,465 $884,439,493 $785,405,448 $115,289,467 $35,902,704 $35,469,542
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$100K under $200K 27,175 $3,822,443,394 $3,093,422,142 $2,862,295,550 $465,167,062 $130,456,783 $128,441,082
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$200K under $500K 14,485 $4,257,095,113 $3,733,739,241 $3,630,544,356 $735,358,097 $165,200,870 $160,193,427
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$500K under $1M 2,540 $1,716,117,477 $1,567,356,640 $1,551,678,149 $402,543,842 $70,643,867 $66,359,104
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$1M and over 1,250 $3,991,638,551 $3,649,004,786 $3,630,358,355 $1,022,166,843 $165,491,510 $152,736,658
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Total 150,700 $17,344,430,212 $14,516,922,029 $13,371,715,372 $2,928,991,142 $635,290,812 $610,303,772
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II. Number of Returns and Average Dollar Amounts per Return
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Size of Federal AGI Number
of Returns 		Federal AGI Federal
Taxable Income 		Colorado
Taxable Income ² 		Federal Tax Colorado
Gross Tax ³ 		Colorado
Net Tax
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Negative Income 2,462 ($173,716)$0 ($148,951)$525 $51 $69
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$0 under $10K 17,514 $4,574 $135 ($5,503)$110 $22 $22
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$10K under $20K 14,116 $14,832 $2,165 $255 $461 $140 $139
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$20K under $30K 13,454 $25,006 $9,992 $8,397 $1,182 $465 $462
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$30K under $40K 13,364 $34,882 $19,185 $17,212 $2,079 $831 $827
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$40K under $50K 10,931 $44,866 $28,369 $25,294 $3,053 $1,186 $1,175
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$50K under $60K 8,896 $54,845 $37,389 $32,654 $4,190 $1,529 $1,516
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$60K under $75K 10,877 $67,175 $48,036 $42,381 $5,921 $1,947 $1,930
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$75K under $100K 13,636 $86,812 $64,861 $57,598 $8,455 $2,633 $2,601
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$100K under $200K 27,175 $140,660 $113,833 $105,328 $17,117 $4,801 $4,726
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$200K under $500K 14,485 $293,897 $257,766 $250,642 $50,767 $11,405 $11,059
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$500K under $1M 2,540 $675,637 $617,070 $610,897 $158,482 $27,813 $26,126
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$1M and over 1,250 $3,193,311 $2,919,204 $2,904,287 $817,733 $132,393 $122,189
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Average 150,700 $115,092 $96,330 $88,731 $19,436 $4,216 $4,050
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Source: Federal and Colorado individual income tax returns (full-year residents only)
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NR - Not releasable due to confidentiality requirements. Total includes NR data.
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¹ Returns with a mailing address that do not match a Colorado county are excluded from this table.
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² The Colorado Taxable Income (CTI) reported on Colorado returns can be positive, zero, or negative. The CTI is negative when the taxpayer reports losses and/or subtractions greater than their income and additions. Negative values do not reduce their tax liability to be less than $0.
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³ Colorado Gross Tax is determined based on Colorado Taxable Income greater than zero. To calculate positive Colorado Taxable Income, divide the Colorado Gross Tax by the income tax rate.
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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 25, 2022
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Publish date: September 2024
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