Connecticut Child Support Calculator

How is Child Support Calculated in Connecticut?

Connecticut calculates child support by first combining your and the other parent's net weekly incomes to see what you would have spent on the children if you were together. Your share of this total obligation is based on your percentage of the combined income, as governed by Connecticut General Statutes § 46b-215a.

Understanding Shared Custody Adjustments in CT

In Connecticut, a shared physical custody adjustment may apply when a parent has the children for at least 146 overnights per year. Under the official guidelines (C.G.S.A. § 46b-215a), this triggers a specific formula where the basic support obligation is first multiplied by 1.5, and then parents are credited for the parenting time they have, which typically reduces the final support amount.

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✓ Verified for 2026 Guidelines • Reviewed October 2026 by Harmoney

Connecticut Child Support Guidelines at a Glance

Guideline Model Income Shares Model
Governing Legal Authority C.G.S.A. § 46b-215a
Shared Custody Threshold 146 Overnights (Approx. 40% Time)
Age Support Ends Age 18 (or 19 if in High School)
Modification Standard 15% Change in Support Amount or Substantial Change

Frequently Asked Questions About CT Child Support


At what age does child support end in CT?

Child support in Connecticut ends when a child turns 18, but it can be extended until age 19 if the child is still a full-time high school student. This rule is established under Connecticut General Statutes § 46b-84(b).

How is child support calculated if one parent is unemployed in CT?

If a parent is unemployed or underemployed in Connecticut, a judge can calculate child support based on their 'earning capacity' rather than their actual income. This process, known as imputing income, considers the parent's work history, skills, and local job opportunities.

How do I modify a child support order in CT?

You can modify a child support order in Connecticut if there is a substantial change in circumstances or if the new calculation shows a 15% or greater difference from the existing order. The legal standard for modification is detailed in Connecticut General Statutes § 46b-86.

Does CT child support cover college expenses?

Connecticut courts can order a parent to contribute to college expenses for a child up to age 23, but it is not automatic. A judge will consider several factors, including the parents' financial resources and the child's academic record, as outlined in C.G.S. § 46b-56c.

How does CT handle health insurance and childcare costs?

Health insurance premiums and work-related childcare costs are added to the basic child support obligation and are divided between the parents in proportion to their respective net incomes. This ensures both parents contribute to these necessary expenses according to their ability to pay.