Credits based on adjusted gross income.

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(a)(1) Any person, other than a trust or estate, subject to the tax under this chapter for any taxable year who files under the federal income tax for such taxable year as a married individual filing separately or for taxable years commencing prior to January 1, 2000, who files under the federal income tax for such taxable year as an unmarried individual shall be entitled to a credit in determining the amount of tax liability for purposes of this chapter in accordance with the following schedule:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $12,000 but
not over $15,000 75%
Over $15,000 but
not over $15,500 70%
Over $15,500 but
not over $16,000 65%
Over $16,000 but
not over $16,500 60%
Over $16,500 but
not over $17,000 55%
Over $17,000 but
not over $17,500 50%
Over $17,500 but
not over $18,000 45%
Over $18,000 but
not over $18,500 40%
Over $18,500 but
not over $20,000 35%
Over $20,000 but
not over $20,500 30%
Over $20,500 but
not over $21,000 25%
Over $21,000 but
not over $21,500 20%
Over $21,500 but
not over $25,000 15%
Over $25,000 but
not over $25,500 14%
Over $25,500 but
not over $26,000 13%
Over $26,000 but
not over $26,500 12%
Over $26,500 but
not over $27,000 11%
Over $27,000 but
not over $48,000 10%
Over $48,000 but
not over $48,500 9%
Over $48,500 but
not over $49,000 8%
Over $49,000 but
not over $49,500 7%
Over $49,500 but
not over $50,000 6%
Over $50,000 but
not over $50,500 5%
Over $50,500 but
not over $51,000 4%
Over $51,000 but
not over $51,500 3%
Over $51,500 but
not over $52,000 2%
Over $52,000 but
not over $52,500 1%

(2) For taxable years commencing on or after January 1, 2000, any person, other than a trust or estate, subject to the tax under this chapter for any taxable year who files under the federal income tax for such taxable year as an unmarried individual shall be entitled to a credit in determining the amount of tax liability for purposes of this chapter in accordance with the following schedule:

(A) For taxable years commencing on or after January 1, 2000, but prior to January 1, 2001:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $12,250 but
not over $15,300 75%
Over $15,300 but
not over $15,800 70%
Over $15,800 but
not over $16,300 65%
Over $16,300 but
not over $16,800 60%
Over $16,800 but
not over $17,300 55%
Over $17,300 but
not over $17,800 50%
Over $17,800 but
not over $18,300 45%
Over $18,300 but
not over $18,800 40%
Over $18,800 but
not over $20,400 35%
Over $20,400 but
not over $20,900 30%
Over $20,900 but
not over $21,400 25%
Over $21,400 but
not over $21,900 20%
Over $21,900 but
not over $25,500 15%
Over $25,500 but
not over $26,000 14%
Over $26,000 but
not over $26,500 13%
Over $26,500 but
not over $27,000 12%
Over $27,000 but
not over $27,500 11%
Over $27,500 but
not over $49,000 10%
Over $49,000 but
not over $49,500 9%
Over $49,500 but
not over $50,000 8%
Over $50,000 but
not over $50,500 7%
Over $50,500 but
not over $51,000 6%
Over $51,000 but
not over $51,500 5%
Over $51,500 but
not over $52,000 4%
Over $52,000 but
not over $52,500 3%
Over $52,500 but
not over $53,000 2%
Over $53,000 but
not over $53,500 1%

(B) For taxable years commencing on or after January 1, 2001, but prior to January 1, 2004:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $12,500 but
not over $15,600 75%
Over $15,600 but
not over $16,100 70%
Over $16,100 but
not over $16,600 65%
Over $16,600 but
not over $17,100 60%
Over $17,100 but
not over $17,600 55%
Over $17,600 but
not over $18,100 50%
Over $18,100 but
not over $18,600 45%
Over $18,600 but
not over $19,100 40%
Over $19,100 but
not over $20,800 35%
Over $20,800 but
not over $21,300 30%
Over $21,300 but
not over $21,800 25%
Over $21,800 but
not over $22,300 20%
Over $22,300 but
not over $26,000 15%
Over $26,000 but
not over $26,500 14%
Over $26,500 but
not over $27,000 13%
Over $27,000 but
not over $27,500 12%
Over $27,500 but
not over $28,000 11%
Over $28,000 but
not over $50,000 10%
Over $50,000 but
not over $50,500 9%
Over $50,500 but
not over $51,000 8%
Over $51,000 but
not over $51,500 7%
Over $51,500 but
not over $52,000 6%
Over $52,000 but
not over $52,500 5%
Over $52,500 but
not over $53,000 4%
Over $53,000 but
not over $53,500 3%
Over $53,500 but
not over $54,000 2%
Over $54,000 but
not over $54,500 1%

(C) For taxable years commencing on or after January 1, 2004, but prior to January 1, 2007:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $12,625 but
not over $15,750 75%
Over $15,750 but
not over $16,250 70%
Over $16,250 but
not over $16,750 65%
Over $16,750 but
not over $17,250 60%
Over $17,250 but
not over $17,750 55%
Over $17,750 but
not over $18,250 50%
Over $18,250 but
not over $18,750 45%
Over $18,750 but
not over $19,250 40%
Over $19,250 but
not over $21,050 35%
Over $21,050 but
not over $21,550 30%
Over $21,550 but
not over $22,050 25%
Over $22,050 but
not over $22,550 20%
Over $22,550 but
not over $26,300 15%
Over $26,300 but
not over $26,800 14%
Over $26,800 but
not over $27,300 13%
Over $27,300 but
not over $27,800 12%
Over $27,800 but
not over $28,300 11%
Over $28,300 but
not over $50,500 10%
Over $50,500 but
not over $51,000 9%
Over $51,000 but
not over $51,500 8%
Over $51,500 but
not over $52,000 7%
Over $52,000 but
not over $52,500 6%
Over $52,500 but
not over $53,000 5%
Over $53,000 but
not over $53,500 4%
Over $53,500 but
not over $54,000 3%
Over $54,000 but
not over $54,500 2%
Over $54,500 but
not over $55,000 1%

(D) For taxable years commencing on or after January 1, 2007, but prior to January 1, 2008:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $12,750 but
not over $15,900 75%
Over $15,900 but
not over $16,400 70%
Over $16,400 but
not over $16,900 65%
Over $16,900 but
not over $17,400 60%
Over $17,400 but
not over $17,900 55%
Over $17,900 but
not over $18,400 50%
Over $18,400 but
not over $18,900 45%
Over $18,900 but
not over $19,400 40%
Over $19,400 but
not over $21,300 35%
Over $21,300 but
not over $21,800 30%
Over $21,800 but
not over $22,300 25%
Over $22,300 but
not over $22,800 20%
Over $22,800 but
not over $26,600 15%
Over $26,600 but
not over $27,100 14%
Over $27,100 but
not over $27,600 13%
Over $27,600 but
not over $28,100 12%
Over $28,100 but
not over $28,600 11%
Over $28,600 but
not over $51,000 10%
Over $51,000 but
not over $51,500 9%
Over $51,500 but
not over $52,000 8%
Over $52,000 but
not over $52,500 7%
Over $52,500 but
not over $53,000 6%
Over $53,000 but
not over $53,500 5%
Over $53,500 but
not over $54,000 4%
Over $54,000 but
not over $54,500 3%
Over $54,500 but
not over $55,000 2%
Over $55,000 but
not over $55,500 1%

(E) For taxable years commencing on or after January 1, 2008, but prior to January 1, 2012:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $13,000 but
not over $16,300 75%
Over $16,300 but
not over $16,800 70%
Over $16,800 but
not over $17,300 65%
Over $17,300 but
not over $17,800 60%
Over $17,800 but
not over $18,300 55%
Over $18,300 but
not over $18,800 50%
Over $18,800 but
not over $19,300 45%
Over $19,300 but
not over $19,800 40%
Over $19,800 but
not over $21,700 35%
Over $21,700 but
not over $22,200 30%
Over $22,200 but
not over $22,700 25%
Over $22,700 but
not over $23,200 20%
Over $23,200 but
not over $27,100 15%
Over $27,100 but
not over $27,600 14%
Over $27,600 but
not over $28,100 13%
Over $28,100 but
not over $28,600 12%
Over $28,600 but
not over $29,100 11%
Over $29,100 but
not over $52,000 10%
Over $52,000 but
not over $52,500 9%
Over $52,500 but
not over $53,000 8%
Over $53,000 but
not over $53,500 7%
Over $53,500 but
not over $54,000 6%
Over $54,000 but
not over $54,500 5%
Over $54,500 but
not over $55,000 4%
Over $55,000 but
not over $55,500 3%
Over $55,500 but
not over $56,000 2%
Over $56,000 but
not over $56,500 1%

(F) For taxable years commencing on or after January 1, 2012, but prior to January 1, 2013:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $13,500 but
not over $16,900 75%
Over $16,900 but
not over $17,400 70%
Over $17,400 but
not over $17,900 65%
Over $17,900 but
not over $18,400 60%
Over $18,400 but
not over $18,900 55%
Over $18,900 but
not over $19,400 50%
Over $19,400 but
not over $19,900 45%
Over $19,900 but
not over $20,400 40%
Over $20,400 but
not over $22,500 35%
Over $22,500 but
not over $23,000 30%
Over $23,000 but
not over $23,500 25%
Over $23,500 but
not over $24,000 20%
Over $24,000 but
not over $28,100 15%
Over $28,100 but
not over $28,600 14%
Over $28,600 but
not over $29,100 13%
Over $29,100 but
not over $29,600 12%
Over $29,600 but
not over $30,100 11%
Over $30,100 but
not over $54,000 10%
Over $54,000 but
not over $54,500 9%
Over $54,500 but
not over $55,000 8%
Over $55,000 but
not over $55,500 7%
Over $55,500 but
not over $56,000 6%
Over $56,000 but
not over $56,500 5%
Over $56,500 but
not over $57,000 4%
Over $57,000 but
not over $57,500 3%
Over $57,500 but
not over $58,000 2%
Over $58,000 but
not over $58,500 1%

(G) For taxable years commencing on or after January 1, 2013, but prior to January 1, 2014:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $14,000 but
not over $17,500 75%
Over $17,500 but
not over $18,000 70%
Over $18,000 but
not over $18,500 65%
Over $18,500 but
not over $19,000 60%
Over $19,000 but
not over $19,500 55%
Over $19,500 but
not over $20,000 50%
Over $20,000 but
not over $20,500 45%
Over $20,500 but
not over $21,000 40%
Over $21,000 but
not over $23,300 35%
Over $23,300 but
not over $23,800 30%
Over $23,800 but
not over $24,300 25%
Over $24,300 but
not over $24,800 20%
Over $24,800 but
not over $29,200 15%
Over $29,200 but
not over $29,700 14%
Over $29,700 but
not over $30,200 13%
Over $30,200 but
not over $30,700 12%
Over $30,700 but
not over $31,200 11%
Over $31,200 but
not over $56,000 10%
Over $56,000 but
not over $56,500 9%
Over $56,500 but
not over $57,000 8%
Over $57,000 but
not over $57,500 7%
Over $57,500 but
not over $58,000 6%
Over $58,000 but
not over $58,500 5%
Over $58,500 but
not over $59,000 4%
Over $59,000 but
not over $59,500 3%
Over $59,500 but
not over $60,000 2%
Over $60,000 but
not over $60,500 1%

(H) For taxable years commencing on or after January 1, 2014, but prior to January 1, 2016:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $14,500 but
not over $18,100 75%
Over $18,100 but
not over $18,600 70%
Over $18,600 but
not over $19,100 65%
Over $19,100 but
not over $19,600 60%
Over $19,600 but
not over $20,100 55%
Over $20,100 but
not over $20,600 50%
Over $20,600 but
not over $21,100 45%
Over $21,100 but
not over $21,600 40%
Over $21,600 but
not over $24,200 35%
Over $24,200 but
not over $24,700 30%
Over $24,700 but
not over $25,200 25%
Over $25,200 but
not over $25,700 20%
Over $25,700 but
not over $30,200 15%
Over $30,200 but
not over $30,700 14%
Over $30,700 but
not over $31,200 13%
Over $31,200 but
not over $31,700 12%
Over $31,700 but
not over $32,200 11%
Over $32,200 but
not over $58,000 10%
Over $58,000 but
not over $58,500 9%
Over $58,500 but
not over $59,000 8%
Over $59,000 but
not over $59,500 7%
Over $59,500 but
not over $60,000 6%
Over $60,000 but
not over $60,500 5%
Over $60,500 but
not over $61,000 4%
Over $61,000 but
not over $61,500 3%
Over $61,500 but
not over $62,000 2%
Over $62,000 but
not over $62,500 1%

(I) For taxable years commencing on or after January 1, 2016:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $15,000 but
not over $18,800 75%
Over $18,800 but
not over $19,300 70%
Over $19,300 but
not over $19,800 65%
Over $19,800 but
not over $20,300 60%
Over $20,300 but
not over $20,800 55%
Over $20,800 but
not over $21,300 50%
Over $21,300 but
not over $21,800 45%
Over $21,800 but
not over $22,300 40%
Over $22,300 but
not over $25,000 35%
Over $25,000 but
not over $25,500 30%
Over $25,500 but
not over $26,000 25%
Over $26,000 but
not over $26,500 20%
Over $26,500 but
not over $31,300 15%
Over $31,300 but
not over $31,800 14%
Over $31,800 but
not over $32,300 13%
Over $32,300 but
not over $32,800 12%
Over $32,800 but
not over $33,300 11%
Over $33,300 but
not over $60,000 10%
Over $60,000 but
not over $60,500 9%
Over $60,500 but
not over $61,000 8%
Over $61,000 but
not over $61,500 7%
Over $61,500 but
not over $62,000 6%
Over $62,000 but
not over $62,500 5%
Over $62,500 but
not over $63,000 4%
Over $63,000 but
not over $63,500 3%
Over $63,500 but
not over $64,000 2%
Over $64,000 but
not over $64,500 1%

(b) Any person subject to tax under this chapter who files a return under the federal income tax for such taxable year as a head of household, as defined in Section 2(b) of the Internal Revenue Code, shall be entitled to a credit in determining the amount of tax liability for purposes of this chapter in accordance with the following schedule:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $19,000 but
not over $24,000 75%
Over $24,000 but
not over $24,500 70%
Over $24,500 but
not over $25,000 65%
Over $25,000 but
not over $25,500 60%
Over $25,500 but
not over $26,000 55%
Over $26,000 but
not over $26,500 50%
Over $26,500 but
not over $27,000 45%
Over $27,000 but
not over $27,500 40%
Over $27,500 but
not over $34,000 35%
Over $34,000 but
not over $34,500 30%
Over $34,500 but
not over $35,000 25%
Over $35,000 but
not over $35,500 20%
Over $35,500 but
not over $44,000 15%
Over $44,000 but
not over $44,500 14%
Over $44,500 but
not over $45,000 13%
Over $45,000 but
not over $45,500 12%
Over $45,500 but
not over $46,000 11%
Over $46,000 but
not over $74,000 10%
Over $74,000 but
not over $74,500 9%
Over $74,500 but
not over $75,000 8%
Over $75,000 but
not over $75,500 7%
Over $75,500 but
not over $76,000 6%
Over $76,000 but
not over $76,500 5%
Over $76,500 but
not over $77,000 4%
Over $77,000 but
not over $77,500 3%
Over $77,500 but
not over $78,000 2%
Over $78,000 but
not over $78,500 1%

(c) Any husband and wife subject to tax under this chapter for any taxable year who file a return under the federal income tax for such taxable year as married individuals filing joint returns or any person who files a return for such taxable year as a surviving spouse, as defined in Section 2(a) of the Internal Revenue Code, shall be entitled to a credit in determining the amount of tax liability for purposes of this chapter in accordance with the following schedule:

Connecticut
Adjusted Gross Income
Amount of Credit
Over $24,000 but
not over $30,000 75%
Over $30,000 but
not over $30,500 70%
Over $30,500 but
not over $31,000 65%
Over $31,000 but
not over $31,500 60%
Over $31,500 but
not over $32,000 55%
Over $32,000 but
not over $32,500 50%
Over $32,500 but
not over $33,000 45%
Over $33,000 but
not over $33,500 40%
Over $33,500 but
not over $40,000 35%
Over $40,000 but
not over $40,500 30%
Over $40,500 but
not over $41,000 25%
Over $41,000 but
not over $41,500 20%
Over $41,500 but
not over $50,000 15%
Over $50,000 but
not over $50,500 14%
Over $50,500 but
not over $51,000 13%
Over $51,000 but
not over $51,500 12%
Over $51,500 but
not over $52,000 11%
Over $52,000 but
not over $96,000 10%
Over $96,000 but
not over $96,500 9%
Over $96,500 but
not over $97,000 8%
Over $97,000 but
not over $97,500 7%
Over $97,500 but
not over $98,000 6%
Over $98,000 but
not over $98,500 5%
Over $98,500 but
not over $99,000 4%
Over $99,000 but
not over $99,500 3%
Over $99,500 but
not over $100,000 2%
Over $100,000 but
not over $100,500 1%

(June Sp. Sess. P.A. 91-3, S. 54, 168; May Sp. Sess. P.A. 92-5, S. 4, 37; May Sp. Sess. P.A. 94-4, S. 25, 85; P.A. 95-160, S. 64, 69; P.A. 99-173, S. 6, 65; May 9 Sp. Sess. P.A. 02-1, S. 79; June 30 Sp. Sess. P.A. 03-1, S. 116; P.A. 05-251, S. 75; June Sp. Sess. P.A. 09-3, S. 123; P.A. 15-244, S. 68.)

History: June Sp. Sess. P.A. 91-3, S. 54, effective August 22, 1991, and applicable to taxable years of taxpayers commencing on or after January 1, 1991; May Sp. Sess. P.A. 92-5 made a technical change, effective June 19, 1992, and applicable to taxable years of taxpayers commencing on or after January 1, 1992; May Sp. Sess. P.A. 94-4 amended section to graduate the tax credits from 75% to 1% and to expand the income levels eligible for the credits from $48,000 to $52,000 for individuals, from $74,000 to $78,500 for heads of households and from $96,000 to $100,500, effective January 1, 1995, and applicable to taxable years commencing on or after said date; P.A. 95-160 revised effective date of May Sp. Sess. P.A. 94-4 but without affecting this section; P.A. 99-173 amended Subsec. (a) to adjust the credit schedule for unmarried single filers over an eight-year period from a starting amount of $12,250 in 2000 to $15,000 in 2007, effective June 23, 1999, and applicable to tax years commencing on or after January 1, 2000; May 9 Sp. Sess. P.A. 02-1 amended Subsec. (a)(2) to defer by two years the increase in the credit for single filers, effective July 1, 2002, and applicable to taxable years commencing on or after January 1, 2002; June 30 Sp. Sess. P.A. 03-1 added Subsec. (a)(2)(C) re credit amount for unmarried filers for taxable year 2004, redesignating existing Subparas. (C) to (H) as Subparas. (D) to (I) and amending said Subparas. to delay the change in credit amounts for unmarried filers by one year, effective August 16, 2003, and applicable to taxable years commencing on or after January 1, 2004; P.A. 05-251 amended Subsec. (a)(2)(C) to (I) to delay for two years the change in credit amounts for single filers, effective June 30, 2005, and applicable to taxable years commencing on or after January 1, 2005; June Sp. Sess. P.A. 09-3 amended Subsec. (a)(2)(E) to (I) to delay change in credit amounts for single filers for 3 years, effective September 9, 2009, and applicable to taxable years commencing on or after January 1, 2009; P.A. 15-244 amended Subsec. (a)(2)(H) and (I) to delay change in credit amounts for any taxpayer filing as an unmarried individual for one year, effective June 30, 2015, and applicable to taxable years commencing on or after January 1, 2015.


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