Child Support in North Carolina

How North Carolina calculates child support

North Carolina uses the income-shares model: a child should receive the same share of the parents' combined income they would have if the parents lived together. Both incomes go on the worksheet, a basic obligation is read from the state schedule, and certain expenses are added and divided in proportion to income.

The three worksheets

• Worksheet A — primary custody: one parent has the child 243+ nights/year; the other pays their income share.
• Worksheet B — shared custody: each parent has the child 123+ nights/year; the basic obligation is multiplied by 1.5 and adjusted for time with each parent.
• Worksheet C — split custody: each parent has primary custody of at least one of the children.

The 123-overnight rule

The number of overnights is decisive: at 123 overnights a year the case shifts from Worksheet A to the shared-custody Worksheet B, which usually lowers a higher earner's obligation — one of the most important numbers in any North Carolina support case.

What's added to the basic obligation

Work-related child care, the child's health-insurance premium, and certain extraordinary expenses (special-needs schooling, travel for visitation) are added and prorated by income.

"Shouldn't support wait until custody is decided?"

It's the most logical question in family court: the worksheet turns on overnights, overnights turn on the custody schedule, so how can support be set before custody is? The honest answer: there is no automatic right to wait. Support and custody are independent claims — courts can enter temporary support while custody is pending (§ 50-13.5(d)(2)), and agency (IV-D) support cases run on their own calendar regardless of your custody file. But the timing problem is real, judges know it, and there are legitimate tools to manage it:

• Ask to align the calendars. Move to continue the support hearing until the temporary-custody hearing, or to hear them together — the argument is judicial economy: a worksheet built on a guessed schedule guarantees an immediate modification motion once custody is set. This is discretionary, but it's a reasonable, frequently granted request when the custody hearing is actually near.
• If support is set first, make it expressly temporary. Ask that the order be designated temporary and without prejudice, based on the current actual overnight schedule, with recalculation when the custody order enters. A custody order that moves the 123-overnight line is a textbook change supporting modification — but an explicit recalculation framework saves you that fight.
• Know the trap: waiting doesn't erase the meter. When support is finally set, it can reach back — at minimum to the filing date, and North Carolina also allows retroactive support for periods before filing based on actual expenditures. A payor who stalls the support case while custody pends may simply be building a lump-sum arrears bill at the end. Often the smarter play is the opposite: get a fair temporary number on the record now, paid through withholding, so the history shows support — then true it up when custody lands.
• If the support case is an agency (IV-D) case, it's prosecuted by Child Support Services in its own file and won't pause for your private custody litigation — raise the pending custody schedule at the support hearing and ask for the temporary/recalculation framing there. See the hearing-day playbook for the exact requests.

Modifying support

An order at least three years old can be modified if the guideline amount differs by 15% or more; otherwise you generally must show a substantial change in circumstances.

Frequently asked questions