Determination of income within this state of a part-year resident. Change of status.
Conn. Gen. Stat. § 12-717
in effect12-717. Determination of income within this state of a part-year resident. Change of status.
(a) The income derived from or connected with sources within this state of a part-year resident individual shall be the sum of the following: (1) Connecticut adjusted gross income for the period of residence, computed as if his taxable year for Connecticut income tax purposes were limited to the period of residence; (2) the income derived from or connected with sources within this state for the period of nonresidence determined in accordance with section 12-711 as if his taxable year for Connecticut income tax purposes were limited to the period of nonresidence; and (3) the special accruals required by subsection (c) of this section.
(b) The income derived from or connected with sources within this state of a part-year resident trust shall be the sum of the following: (1) The share of Connecticut adjusted gross income for the period of residence, determined as if such trust were an individual whose taxable year for federal income tax purposes were limited to the period of residence, allocated to the trust in accordance with the methods of allocation set forth in section 12-714. Such share of Connecticut adjusted gross income shall include the amount of any includable gain, reduced by any deductions properly allocable thereto, upon which tax is imposed for the taxable year pursuant to Section 644 of the Internal Revenue Code; (2) the income derived from or connected with sources within this state for the period of nonresidence determined in accordance with section 12-713 as if its taxable year for federal income tax purposes were limited to the period of nonresidence; and (3) the special accruals required by subsection (c) of this section.
(c) (1) If an individual changes his status from resident to nonresident he shall, regardless of his method of accounting, accrue to the portion of the taxable year prior to such change of status any items of income, gain, loss or deduction accruing prior to the change of status, if not otherwise properly entering into his federal adjusted gross income for such portion of the taxable year or prior taxable year under his method of accounting.
(2) If an individual changes his status from nonresident to resident he shall, regardless of his method of accounting, accrue to the portion of the taxable year prior to such change of status any items of income, gain, loss or deduction accruing prior to the change of status, other than items derived from or connected with Connecticut sources, if not otherwise properly entering into his federal adjusted gross income for such portion of the taxable year or for a prior taxable year under his method of accounting.
(3) No item of income, gain, loss or deduction which is accrued under this subsection shall be taken into account in determining Connecticut adjusted gross income or income derived from or connected with sources within this state for any subsequent taxable period.
(4) The accruals otherwise required under this subsection shall not be required if the individual files with the commissioner a bond or other security acceptable to the commissioner, conditioned upon the inclusion of amounts accruable under this subsection in Connecticut adjusted gross income or income derived from or connected with sources within this state for one or more subsequent taxable years as if the individual had not changed his resident status.
(5) If a trust changes its status from resident to nonresident or from nonresident to resident, the provisions of subdivisions (1) to (4), inclusive, of this subsection shall apply, except that the term “individual” shall be read as “trust”, reference to “items of income, gain, loss or deduction” shall mean the trust's share of such items determined in accordance with the methods of allocation set forth in section 12-714, reference to “gain” shall include any modification for includable gain under subdivision (9) of subsection (a) of section 12-701 and federal adjusted gross income shall be determined as if the trust were an individual.
(June Sp. Sess. P.A. 91-3, S. 68, 168; May Sp. Sess. P.A. 92-5, S. 12, 37; P.A. 22-110, S. 35.)
History: June Sp. Sess. P.A. 91-3, S. 68, 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 various technical and minor changes, effective June 19, 1992, and applicable to taxable years of taxpayers commencing January 1, 1992; P.A. 22-110 amended Subsec. (c)(5) by replacing reference to Sec. 12-701(9) with reference to Sec. 12-701(a)(9).
Source: Connecticut General Assembly (cga.ct.gov)URL: https://www.cga.ct.gov/current/pub/chap_229.htm#sec_12-717Fetched: 10/20/2026