Conn. Agencies Regs. § 46b-215a-3a
(b) General rule
(1) Except as provided in subsections (c), (d) and (e) of this section, the weekly arrearage payment shall equal the lesser of:
(c) Special rule for low-income obligorsSubject to subsection (e)(1) of this section, the weekly arrearage payment of a low-income obligor shall equal the greater of:
(d) Special rule if there is no current support orderSubject to subsection (e)(1) of this section, the weekly arrearage payment when there is no current support order in effect for any child of the parties shall equal:
(e) Special rule for child living with the obligor
(1) ApplicabilityThis subsection applies when the child for whom the arrearage is owed is living with the obligor. If this subsection applies, subsections (c) and (d) of this section shall not be used to determine the arrearage payment. For the purposes of this subsection, a child is deemed to be living with the obligor if the circumstances in either subparagraph (A) or subparagraph (B) of this subdivision are found.
(i) the six months immediately preceding the determination of the arrearage payment, or(ii) six of the twelve months immediately preceding such determination.
(2) Special rule When this subsection applies, the weekly arrearage payment shall be:
(f) Use of the worksheet in arrearage determinationsLine references throughout this subsection are to the worksheet included in section 46b-215a-6 of the Regulations of Connecticut State Agencies, which worksheet is intended for use with the following instructions.
(1) Determine the total arrearage Add all amounts described in subparagraphs (A), (B) and (C) of this subdivision to determine the total arrearage to be paid for past support of the subject child. Enter the sum on line 32, indicating separately, if applicable, amounts due to the state and amounts due to the family. Amounts comprising the total arrearage are:
(2) Determine the arrearage payment Enter on line 29 either twenty percent of the line 30 amount or, if applicable, the amount determined in one of subparagraphs (A) to (D), inclusive, of this subdivision (corresponding to paragraphs A to D, inclusive, in section VI of the worksheet). The line 29 amount is the presumptive arrearage payment. Enter this amount on line 31 unless a deviation criterion applies. If the amount entered on line 31 differs from the line 29 amount, complete section VIII of the worksheet.
(i) $1 per week if the obligor’s gross income is less than or equal to two hundred fifty percent of poverty level for the obligor's household size, or (ii) twenty percent of an imputed support obligation for the child if the obligor’s gross income is greater than two hundred fifty percent of poverty level for the obligor's household size.
(i) twenty percent of an imputed support obligation if the parents have a present duty to provide support for the child, or (ii) one hundred percent of an imputed support obligation if the parents have no present duty to provide support for the individual.
(Effective July 1, 2015)