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How is child support calculated in North Carolina?

Federal & State Law Editorial TeamLast reviewed: 2026-04-30

North Carolina child support is governed by N.C.G.S. § 50-13.4 and the North Carolina Child Support Guidelines promulgated by the Conference of Chief District Judges (last revised effective Jan. 1, 2023).

1. The Three Worksheets

  • Worksheet A — Sole Custody: Used when one parent has primary custody and the other parent has fewer than 123 overnights per year.
  • Worksheet B — Shared Custody: Used when each parent has the child at least 123 overnights per year (approximately one-third of the year). Includes a shared-parenting calculation that multiplies the basic obligation by 1.5.
  • Worksheet C — Split Custody: Used when each parent has primary custody of at least one of the children.
  • 2. Calculation Steps

  • Determine each parent's gross monthly income.
  • Combine incomes.
  • Look up the Basic Child Support Obligation on the Schedule.
  • Add adjustments for work-related childcare, health insurance premium for the child, and extraordinary expenses.
  • Compute each parent's pro rata share by income.
  • For Worksheet B, apply the shared-parenting offset.
  • 3. Gross Income Definition

    Includes income from any source — salary, wages, commissions, bonuses, dividends, severance, pensions, retirement, gifts, prizes, alimony from prior marriages, unemployment, workers' comp, and disability. Excludes means-tested public assistance.

    4. Self-Support Reserve

    The Guidelines protect a minimum subsistence amount for the obligor — currently set at the federal poverty level for one person.

    5. Duration (N.C.G.S. § 50-13.4(c))

    Support continues until the child:

  • Reaches age 18, OR
  • If still in primary or secondary school when reaching 18, until graduation, otherwise ceases to attend regularly, fails to make satisfactory academic progress, or reaches age 20, whichever first.
  • 6. Modification (N.C.G.S. § 50-13.7)

    Modification requires either:

  • A substantial change in circumstances, OR
  • The order is at least 3 years old AND a guideline recomputation differs by 15% or more.
  • 7. Deviation (Guideline § 4)

    The guideline amount is rebuttably presumed correct but may be deviated from with written findings when application would be unjust or inappropriate (e.g., extraordinary travel costs for visitation, child's special needs).

    This is legal information, not legal advice.

    When to Talk to a Lawyer
    • You qualify for Worksheet B shared-parenting (123+ overnights)
    • You need a deviation due to special-needs child or travel expenses
    • Modifying an order older than 3 years
    Related Statutes & Laws
    • N.C.G.S. § 50-13.4
    • N.C.G.S. § 50-13.7
    • N.C.G.S. § 50-13.10

    This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.