Northwest Cook County taxpayers will see a total of $435 million in state income tax increases after SB 9, a tax hike measure, passed the Democrat-controlled Illinois State Senate to become law.
The Northwest Cook County community that will see the largest increase is Barrington/South Barrington/West Inverness, which would see a total increase of $55 million and an average increase of $2,650.
Other communities that will see a large collective increase include North Arlington Heights ($27.5 million), West Palatine/East Inverness ($26.4 million), Park Ridge ($25.1 million) and Buffalo Grove ($22.7 million).
Taxpayers from West Palatine/East Inverness ($1,341), Park Ridge ($1,328), Lincolnwood ($1,172) and West Hoffman Estates ($1,093) will see the highest average increases.
Senate Bill 9, a revenue bill that would generate $5.4 billion by raising the income tax rate to 4.95 percent from 3.75 percent and the corporate tax rate to 7 percent from 5.25 percent, passed 36-18 on Tuesday. It passed the House on Sunday. Gov. Bruce Rauner then vetoed the bill, but the Senate quickly overrode his veto. The House is expected to vote on an override Thursday.
LGIS looked at 2014 income taxes paid by zip code to create a ranking of the highest-paying Northwest Cook County communities.
Its analysis looked at the percentage of total state income taxes paid by zip code, as reported by the Illinois Department of Revenue. It then applied that percentage to the amount Senate Democrats expect their tax hike will raise to calculate an average increase.
The analysis used 2014 tax return data, which is the latest available and also represents a year in which state income taxes were higher-- five percent, or approximately the level to which the Democrats are hoping to raise them.
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Top income tax-paying communities in NW Cook County
Which communities pay the highest income taxes in Northwest Cook County?
| Ranking | Communities | Zip | Average State Income Tax Increase | Total Returns filed by Zip |
| 1 | Barrington / South Barrington / Inverness (West) | 60010 | $2,650 | 20,747 |
| 2 | Palatine (West), Inverness (East) | 60067 | $1,341 | 19,706 |
| 3 | Park Ridge | 60068 | $1,328 | 18,893 |
| 4 | Lincolnwood | 60712 | $1,172 | 6,065 |
| 5 | Hoffman Estates (West) | 60192 | $1,093 | 7,356 |
| 6 | Buffalo Grove | 60089 | $1,073 | 21,127 |
| 7 | Arlington Heights (North) | 60004 | $1,067 | 25,736 |
| 8 | Arlington Heights (South) | 60005 | $1,017 | 14,933 |
| 9 | Schaumburg (Northeast) | 60173 | $963 | 6,811 |
| 10 | Bartlett | 60103 | $916 | 19,609 |
| 11 | Skokie (West) | 60077 | $807 | 13,132 |
| 12 | Schaumburg (Far North) | 60195 | $793 | 2,651 |
| 13 | Des Plaines (South) | 60018 | $779 | 14,508 |
| 14 | Rosemont | 60018 | $779 | 14,508 |
| 15 | Roselle | 60172 | $775 | 12,462 |
| 16 | Skokie (East) | 60076 | $765 | 16,015 |
| 17 | Schaumburg (South) | 60193 | $750 | 20,001 |
| 18 | Morton Grove | 60053 | $735 | 11,797 |
| 19 | Mount Prospect | 60056 | $722 | 27,789 |
| 20 | Prospect Heights | 60070 | $711 | 7,795 |
| 21 | Elk Grove Village | 60007 | $704 | 17,953 |
| 22 | Schaumburg (Northwest) | 60194 | $687 | 9,739 |
| 23 | Rolling Meadows | 60008 | $642 | 11,108 |
| 24 | Palatine (East) | 60074 | $633 | 18,492 |
| 25 | Hoffman Estates (East) | 60169 | $615 | 16,089 |
| 26 | Streamwood | 60107 | $609 | 18,679 |
| 27 | Wheeling | 60090 | $575 | 19,101 |
| 28 | Des Plaines (North) | 60016 | $573 | 30,622 |
| 29 | Niles | 60714 | $553 | 15,003 |
| 30 | Hanover Park | 60133 | $490 | 16,995 |
| 31 | Elgin (East) | 60120 | $464 | 22,307 |
| 32 | Schiller Park | 60176 | $434 | 5,931 |
Source: Illinois Department of Revenue; Blockshopper.com
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How much more will your community pay?
With state income taxes increased to 4.95 percent from 3.75 percent, how much more will taxpayers in your community pay for state government?
| Ranking | Communities | Zip | Estimated State Income Tax Increase |
| 1 | Barrington / South Barrington / Inverness (West) / Barrington Hills | 60010 | $54,972,193 |
| 2 | Arlington Heights (North) | 60004 | $27,469,479 |
| 3 | Palatine (West), Inverness (East) | 60067 | $26,419,667 |
| 4 | Park Ridge | 60068 | $25,091,630 |
| 5 | Buffalo Grove | 60089 | $22,665,393 |
| 6 | Mount Prospect | 60056 | $20,067,935 |
| 7 | Bartlett | 60103 | $17,953,720 |
| 8 | Des Plaines (North) | 60016 | $17,559,308 |
| 9 | Arlington Heights (South) | 60005 | $15,191,059 |
| 10 | Schaumburg (South) | 60193 | $15,009,801 |
| 11 | Elk Grove Village | 60007 | $12,630,347 |
| 12 | Skokie (East) | 60076 | $12,247,500 |
| 13 | Palatine (East) | 60074 | $11,706,894 |
| 14 | Streamwood | 60107 | $11,370,653 |
| 15 | Des Plaines (South) | 60018 | $11,300,372 |
| 16 | Rosemont | 60018 | $11,300,372 |
| 17 | Wheeling | 60090 | $10,987,934 |
| 18 | Skokie (West) | 60077 | $10,593,141 |
| 19 | Elgin (East) | 60120 | $10,355,922 |
| 20 | Hoffman Estates (East) | 60169 | $9,889,995 |
| 21 | Roselle | 60172 | $9,662,905 |
| 22 | Morton Grove | 60053 | $8,671,979 |
| 23 | Hanover Park | 60133 | $8,333,750 |
| 24 | Niles | 60714 | $8,289,631 |
| 25 | Hoffman Estates (West) | 60192 | $8,042,136 |
| 26 | Rolling Meadows | 60008 | $7,126,015 |
| 27 | Lincolnwood | 60712 | $7,105,718 |
| 28 | Schaumburg (Northwest) | 60194 | $6,687,132 |
| 29 | Schaumburg (Northeast) | 60173 | $6,557,906 |
| 30 | Prospect Heights | 60070 | $5,540,555 |
| 31 | Schiller Park | 60176 | $2,575,731 |
| 32 | Schaumburg (Far North) | 60195 | $2,103,373 |
| TOTAL | $435,480,146 |
Sources: Illinois Department of Revenue; Blockshopper.com; Illinois Senate Democrats
*Assumes tax increase will meet Senate Democrats' projections.
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