Support in Connecticut (2026)

The 40% Shared Custody Threshold

One of Connecticut’s most distinctive child support features is its shared physical custody adjustment, which applies when each parent has the child for at least 40% of overnights per year (approximately 146 nights). This threshold is higher than many states, which typically trigger shared custody adjustments at 30% or 35%.

When the 40% threshold is met, the guidelines apply a calculation that offsets each parent’s theoretical obligation against the other, resulting in a net payment from the higher-earning parent to the lower-earning parent. This adjustment recognizes that both households incur direct child-related expenses during their respective periods of care.

The 40% threshold creates a significant practical dynamic: parents who share custody at 39% versus 41% of overnights can see meaningfully different support calculations. This makes the precise overnight count — and the custody schedule that determines it — a financially significant aspect of Connecticut custody and support negotiations.

How Connecticut Calculates Child Support

Connecticut uses an income shares model to determine child support obligations. The Connecticut Child Support and Arrearage Guidelines, established under CGS Section 46b-215a and maintained by the Commission for Child Support Guidelines, provide a formula based on the combined net weekly income of both parents.

The calculation begins by determining each parent’s net weekly income — gross income minus taxes, Social Security contributions, mandatory retirement contributions, union dues, and existing support orders for other dependents. The parents’ combined net income is then applied to the guidelines schedule, which produces a basic child support obligation based on income level and number of children.

Each parent’s proportional share of the basic obligation is determined by their percentage of the combined net income. The parent who does not have primary physical custody typically pays their share directly to the custodial parent. Additional amounts may be added for work-related child care expenses and unreimbursed medical costs, also divided proportionally.

For a broader overview of how support calculations work, see our guide on how child support is calculated. You can also estimate your potential obligation using our child support calculator.

The Self-Support Reserve

Connecticut’s guidelines include a self-support reserve provision that protects low-income parents from support obligations that would push them below poverty level. When the non-custodial parent’s net income falls below a specified threshold, the guidelines reduce or cap the support obligation to ensure the parent retains enough income for basic subsistence.

This provision balances the child’s right to support against the parent’s need to maintain a minimal standard of living. If the parent’s income is sufficiently low, the guideline minimum may apply rather than the percentage-based calculation.

Deviation Criteria

The guidelines amount is presumptive, but the court may deviate from it when strict application would be inequitable or inappropriate. Under the guidelines, permissible deviation criteria include:

• Other financial resources available to a parent or the child
• Extraordinary expenses for the child, such as special medical or educational needs
• Combined net income substantially exceeding the upper limit of the guidelines schedule
• Combined net income falling below the self-support reserve
• Shared physical custody arrangements that create duplicated expenses
• Existing obligations for the support of other dependents
• Extraordinary parenting time arrangements
• Any other special circumstances making the guideline amount inequitable

When a court deviates, it must make a written finding stating the guideline amount and the reasons for the deviation.

Spousal Support (Alimony) in Connecticut

Connecticut courts award alimony under CGS Section 46b-82. The court considers a broad range of factors when determining both the amount and duration of alimony:

• The length of the marriage
• The causes for the dissolution of the marriage
• The age, health, station, occupation, income, earning capacity, vocational skills, education, employability, estate, and needs of each party
• The property division award
• The desirability of the custodial parent securing employment
• Each party’s contribution to the acquisition, preservation, or appreciation of assets
• The opportunity of each party for future acquisition of capital assets and income

Connecticut recognizes several types of alimony. Temporary alimony is awarded during the pendency of the divorce proceedings. Rehabilitative alimony provides support for a defined period to allow a spouse to obtain education, training, or work experience sufficient to become self-supporting. Permanent alimony may be awarded in longer marriages, particularly when one spouse has limited earning capacity. Lump-sum alimony involves a one-time payment rather than periodic installments.

Unlike many states, Connecticut permits the court to consider marital fault when determining alimony. A spouse who committed adultery or engaged in other misconduct may receive a reduced award, or the other spouse may receive a larger one, depending on the circumstances.

Modification of Support Orders

Either parent may petition for modification of child support by showing a substantial change in circumstances under CGS Section 46b-86. Common grounds for modification include significant changes in income, job loss, changes in the child’s needs, or changes in custody arrangements.

Alimony may also be modified upon a showing of substantial change in circumstances. Alimony terminates upon the death of either party or the remarriage of the recipient. Connecticut law also provides that cohabitation by the recipient may be grounds for modification or termination, depending on the terms of the original order.

Enforcement

Connecticut employs a range of enforcement tools when a parent or spouse fails to comply with a support order:

• Income withholding (wage garnishment)
• Interception of state and federal tax refunds
• Suspension of driver’s, professional, and recreational licenses
• Contempt of court, which may result in fines or incarceration
• Liens on real and personal property
• Passport denial for arrearages exceeding $2,500
• Credit bureau reporting
• Bank account levies

The Connecticut Department of Social Services, through its Bureau of Child Support Enforcement, assists custodial parents in establishing, modifying, and enforcing child support orders.

When to Seek Legal Guidance

Connecticut’s child support guidelines and alimony factors involve detailed financial analysis and significant judicial discretion. Whether you are establishing a new support order, seeking a modification, or dealing with enforcement issues, consider scheduling a free consultation with an experienced family law attorney.

Frequently Asked Questions

How is child support calculated in Connecticut?

Connecticut uses the income shares model under CGS Section 46b-215a. Both parents’ net weekly incomes (gross income minus taxes, Social Security, mandatory retirement, union dues, and existing support orders) are combined and applied to the guidelines schedule, which produces a basic child support obligation based on income level and number of children. Each parent’s share is proportional to their percentage of the combined net income.

How does shared custody affect child support in Connecticut?

When each parent has the child for at least 40% of overnights per year, Connecticut’s guidelines apply a shared custody adjustment. The calculation offsets each parent’s theoretical obligation against the other, resulting in a net payment from the higher-earning parent to the lower-earning parent.

What types of alimony does Connecticut award?

Connecticut recognizes temporary alimony (during proceedings), rehabilitative alimony (time-limited to allow a spouse to become self-supporting), permanent alimony (for longer marriages or limited earning capacity), and lump-sum alimony (a one-time payment). Under CGS Section 46b-82, the court considers the length of the marriage, causes for dissolution, each party’s earning capacity, and the property division award. Marital fault may influence the amount.

When does alimony terminate in Connecticut?

Alimony terminates upon the death of either party or the remarriage of the recipient. Cohabitation by the recipient may also be grounds for modification or termination, depending on the terms of the original order. Either party may petition for modification by showing a substantial change in circumstances under CGS Section 46b-86.

Why does the 40% overnight threshold matter so much in Connecticut?

The 40% threshold triggers the shared custody adjustment in child support calculations. Parents who fall just below 40% (for example, 39% of overnights) use the standard formula, while parents at or above 40% use the shared custody formula — which can result in a meaningfully lower net support payment. This makes the precise custody schedule a financially significant negotiation point in many Connecticut cases.

How does the self-support reserve work in Connecticut child support?

The self-support reserve ensures that a non-custodial parent retains enough income for basic subsistence. When the parent’s net income falls below a specified threshold, the guidelines reduce or cap the support obligation. This prevents the support calculation from pushing a low-income parent below the poverty line, while still ensuring the child receives some level of support.

How This Guide Was Researched

This guide was developed through a detailed analysis of the Connecticut Child Support and Arrearage Guidelines, including the income shares formula, the 40% shared custody adjustment, the self-support reserve, and deviation criteria. The alimony provisions were reviewed under CGS Section 46b-82, with attention to the role of marital fault and the distinction between rehabilitative and permanent alimony. Modification and enforcement provisions were analyzed under CGS Sections 46b-84 through 46b-86 and through the Connecticut Department of Social Services Bureau of Child Support Enforcement publications. Additional sources included the Commission for Child Support Guidelines documentation, Connecticut Superior Court decisions on the shared custody adjustment, and the Connecticut Bar Association’s family law section resources.

Sources and Legal References

• CGS Section 46b-215a — Child support guidelines authority and the Commission for Child Support Guidelines
• CGS Sections 46b-84 through 46b-86 — Child support establishment, modification, and enforcement
• CGS Section 46b-82 — Alimony factors, types, and the role of marital fault
• Connecticut Child Support and Arrearage Guidelines — Current schedule, shared custody adjustment, self-support reserve, and deviation criteria
• Connecticut Department of Social Services, Bureau of Child Support Enforcement — Enforcement tools and procedures
• Connecticut Superior Court decisions on the 40% shared custody threshold

Official Connecticut Resources

• Connecticut Judicial Branch – Divorce, Custody and Visitation

For more about how we research our guides, see our editorial policy and sources methodology.

Related Guides

• Child custody in Connecticut — Best interests factors, mediation, and the coercive control reform
• Divorce in Connecticut — Broad judicial discretion over property, the return date system, and grounds
• How child support is calculated — National overview of child support models
• Modifying child support — When and how to request a support change
• Property division in divorce — How equitable distribution works
• How alimony works — Types, duration, and modification across states
• Child support by state — Compare support frameworks across all 50 states