North Carolina Support Estimator

Updated for 2023 Guidelines (Worksheet A & B Logic)

Parent 1

Parent 2

Children & Expenses

Total Monthly Cost

Amount Paid by Parent 1

*Remainder of expenses is assumed to be paid by Parent 2.

Official North Carolina Resources

Worksheet A vs. Worksheet B

North Carolina uses two different worksheets depending on the custody arrangement. The math is completely different between them.

Worksheet A (Sole Custody)

Used when the non-custodial parent has fewer than 123 overnights per year. The non-custodial parent pays their full share of the basic obligation.

Worksheet B (Shared Custody)

Used when both parents have at least 123 overnights. The basic obligation is multiplied by 1.5 (to account for duplicated household costs), and the payments are offset based on time-sharing.

Frequently Asked Questions

What is the 123 overnight rule?

The 123 overnight rule is the threshold for "Shared Physical Custody" in North Carolina. If a parent has the child for at least 123 nights (approx. 33% of the year), the calculation switches to Worksheet B, which typically reduces the amount of support paid by the higher earner.

Is child support based on Gross or Net income?

North Carolina uses Gross Income (before taxes). This includes salary, wages, bonuses, commissions, self-employment income, and retirement. You do not deduct taxes before entering income into the calculator.