Connecticut Child Support Guidelines: Calculation and Modification

The Connecticut child support guidelines use an income-shares model: the court adds both parents’ net weekly income, looks up a basic support amount on a schedule keyed to the number of children, and then splits that amount between the parents in proportion to what each earns. The noncustodial parent pays their share; the custodial parent’s share is assumed to be spent directly on the child. The framework sits under Connecticut General Statutes Section 46b-215a and is updated by the Commission for Child Support Guidelines every four years.¹

How the Calculation Actually Works

Start with combined net weekly income. The schedule maps that figure, along with the number of children, to a basic weekly support obligation. At the lowest income levels, only the noncustodial parent’s income drives the number. Once combined net income rises above roughly $290 per week, the schedule uses both parents’ income and the support percentage shifts.² For one child, the share of combined net income going to support ranges from about 10% at the bottom of the schedule to roughly 25% at moderate income levels, then gradually declines as income climbs.

Once the schedule produces a total, each parent picks up a slice sized to their earnings. A parent making 60% of the combined net income owes 60% of the basic obligation. The custodial parent is presumed to spend their share directly on housing, food, and daily needs. The noncustodial parent’s share is what shows up as the actual payment, then adjusted for add-ons like childcare and health insurance premiums.³

What Counts as Income

Connecticut casts a wide net. Gross income means earned and unearned income from all sources before deductions, and the regulations spell out the categories in detail.⁴

Employment income: salary, hourly wages (capped at 45 paid hours per week), commissions, bonuses, tips, profit sharing, severance, and in-kind compensation such as employer-provided housing or a company car
Benefits: workers’ compensation, unemployment, strike pay, disability insurance, veterans’ benefits, Social Security retirement and disability, and pension or retirement income
Investment and passive income: rental income after reasonable business expenses, interest, dividends, annuities, estate or trust distributions, royalties, and net self-employment earnings
Other income: lottery and gambling winnings, alimony received from someone outside the current case, adoption subsidies for the child at issue, and taxable education grants

The exclusions matter too. Supplemental Security Income is excluded entirely. If a parent receives both SSI and a Social Security disability or retirement benefit, only $5 per week of the Social Security payment counts. Public assistance grants, the earned income tax credit, and child support received for other children in the home also stay out of the calculation.⁵

When a Parent Reports Little or No Income

A parent who is voluntarily unemployed or underemployed cannot dodge support by putting a zero on the form. The court may impute income based on earning capacity, weighing work history, education, vocational skills, and employability.⁶ The deviation criteria list “the parent’s earning capacity” as a financial resource that supports adjusting the presumptive number.⁷ Quitting a job to lower support is not a strategy that works in Connecticut.

Deductions That Turn Gross into Net

Only specific deductions reduce gross income to the net figure used in the schedule:

Federal income tax, based on all allowable exemptions, deductions, and credits
State and local income tax
Social Security tax, or a mandatory retirement contribution in its place, capped at the Social Security maximum
Medicare tax
Health, dental, and medical insurance premiums for the parent and legal dependents, including the child at issue
Court-ordered life insurance for the child’s benefit
Court-ordered disability insurance
Mandatory union dues and initiation fees, only in the amount actually deducted by the employer
Mandatory uniform and tool costs, only in the amount deducted by the employer
Court-ordered alimony and child support paid for people outside the current case

Voluntary retirement contributions beyond what a mandatory plan or Social Security requires do not reduce net income for support purposes.³ The child’s current needs come ahead of a parent’s optional savings.

The Low-Income Floor

If the noncustodial parent’s net weekly income falls below $50, the guidelines eliminate the support obligation. Between roughly $50 and $290 per week, a special low-income section of the schedule uses only the noncustodial parent’s income and applies lower support percentages, so the paying parent keeps enough to cover basic living expenses.²

When the Court Departs from the Number

The number the schedule spits out is presumed correct, but either parent can argue it would be unfair on the facts. To deviate, the court has to make a finding on the record that the guideline amount is inequitable, identify the deviation criterion it is relying on, and state what the guideline amount would have been.⁸

The regulations list the categories that justify a deviation:

Other financial resources, including substantial assets whether or not they produce income, earning capacity, and regularly recurring gifts from a spouse or domestic partner that have reduced the parent’s expenses
Extraordinary child expenses such as education, unreimbursed medical costs, and special-needs expenses
Extraordinary parental expenses such as significant visitation-related travel and unreimbursed job-related costs
Shared physical custody arrangements that substantially reduce costs for one parent or increase them for the other, where both parents can still meet the child’s needs after the deviation

A parental agreement can support a deviation too, but the court still has to identify at least one recognized criterion on the record.⁷

How Long the Obligation Lasts

The default rule is support until the child turns 18. Three situations extend it:

A child still enrolled full-time in high school at 18 continues to receive support until finishing twelfth grade or turning 19, whichever comes first.
For orders entered on or after October 1, 2023, a court can order support for a child with an intellectual, mental, or physical disability who lives with and depends on a parent, running until the child turns 26. Orders entered before that date are capped at 21.
An educational support order can cover post-secondary costs for a child enrolled at least half-time in an accredited college or vocational school and in good academic standing, up to age 23.

The educational support order is a separate track with its own conditions. The child has to share academic records with both parents, and the order suspends for any academic period where the child falls out of compliance.⁶ A court can enter one at the time of divorce, in a pendente lite proceeding, or in a paternity case anytime before the child turns 23.

Modifying an Existing Order

An order can be modified when either parent shows a substantial change in circumstances. The statute doesn’t define “substantial,” so courts look case by case. Common triggers are a significant income change for either parent, a change in the child’s medical or educational needs, and a shift in custody.⁹

Once the court finds a substantial change, it recalculates under the current guidelines, which may have been updated since the original order. One trap catches parents repeatedly: modification is forward-looking. The court cannot rewrite arrears that built up before the motion was served on the other party.⁹ A parent who loses a job and simply stops paying, or pays what they can afford without filing anything, keeps accruing arrears at the original rate until a court signs off on a change.

What Happens If Payments Stop

Every Connecticut child support order includes automatic income withholding. The employer starts deducting the support amount within 14 days of being served with the order and forwards the money to the state disbursement unit within seven business days of each pay date.¹⁰ Firing or disciplining a worker over the withholding exposes the employer to a fine of up to $1,000.

When wages alone don’t cover it, the state can place liens on real or personal property, intercept federal and state tax refunds, and grab lottery winnings. Federal tax refund intercepts start at $150 in past-due support for families receiving Temporary Family Assistance and $500 for other cases.¹¹ Overdue amounts of $1,000 or more are reported to consumer credit agencies. A court or family support magistrate can suspend driver’s, professional, occupational, and even hunting and fishing licenses when nonpayment runs more than 90 days, after finding that the noncompliance was willful.¹² Federally, past-due support of $2,500 or more triggers passport denial or revocation.¹³ Willful refusal to support a child under 18 is also a criminal offense under Section 53-304, punishable by up to a year in prison.¹⁴

Taxes

Child support is tax-neutral. The paying parent gets no deduction, and the receiving parent does not report the payments as income or include them when figuring out whether a return is required.¹⁵ Alimony follows a different set of rules depending on when the divorce was finalized, so don’t assume the two work the same way.

If one parent lives outside Connecticut, the calculation itself doesn’t change, but jurisdiction and enforcement run through the Uniform Interstate Family Support Act at Sections 46b-301 through 46b-425 of the General Statutes rather than through Connecticut alone.¹⁶

1
Justia. Connecticut Code 46b-215a – Commission for Child Support Guidelines
2
Connecticut Judicial Branch. Child Support and Arrearage Guidelines
3
Connecticut eRegulations. Section 46b-215a-2c – Child Support Guidelines
4
Connecticut eRegulations. Section 46b-215a-1 – Definitions
5
Connecticut eRegulations. Connecticut Code 46b-215a-1 – Definitions
6
FindLaw. Connecticut General Statutes Title 46B – 46b-84
7
Connecticut eRegulations. Section 46b-215a-5c – Deviation Criteria
8
Connecticut eRegulations. Subtitle 46b-215a – Child Support Guidelines
9
Justia. Connecticut Code 46b-86 – Modification of Alimony or Support Orders and Judgments
10
Justia. Connecticut General Statutes 52-362 – Income Withholding
11
Justia. Connecticut General Statutes 52-362e – Tax Refund Intercept
12
Justia. Connecticut General Statutes 46b-220 – Suspension of License of Delinquent Child Support Obligor
13
The Administration for Children and Families. Passport Denial Program 101
14
Connecticut General Assembly. Connecticut Code Chapter 946 – Offenses Against Public Policy
15
Internal Revenue Service. Alimony, Child Support, Court Awards, Damages 1
16
Connecticut General Assembly. Chapter 817 – Uniform Interstate Family Support Act