North Carolina Child Support Calculator
Uses NC Income Shares — Worksheet A (primary) / Worksheet B (joint custody)
Table of Contents
How North Carolina Calculates Child Support
North Carolina uses the Income Shares model through guidelines established by the NC Conference of Chief District Judges. The calculation considers both parents' adjusted gross income, combines them, and uses the guidelines schedule to determine the basic child support obligation. Each parent's share is proportional to their income contribution. NC uses two worksheets: Worksheet A for primary (sole) custody and Worksheet B for joint (shared) custody.
The guidelines create a rebuttable presumption that the calculated amount is correct. NC courts can deviate when the guidelines would not meet the reasonable needs of the child or would be unjust to either party. The NC Division of Social Services, Child Support Enforcement Section, administers the state program.
Worksheet A vs. Worksheet B
Worksheet A applies when one parent has primary physical custody (the child lives with that parent more than approximately two-thirds of the year). The non-custodial parent's share of the basic obligation, plus their share of additional expenses, becomes the monthly support payment.
Worksheet B applies when each parent has the child for at least 123 overnights per year (approximately one-third). This worksheet accounts for duplicated fixed costs by calculating each parent's separate obligation and applying an adjustment factor of 1.5. The obligations are offset, and the parent with the higher obligation pays the difference.
Income Under NC Guidelines
NC includes all income: wages, salaries, bonuses, commissions, self-employment, rental, investment, pensions, Social Security, unemployment, workers' compensation, alimony, and military pay. Deductions include federal and NC state taxes, FICA, mandatory retirement, and pre-existing support. NC courts can impute income to voluntarily unemployed or underemployed parents based on earning capacity.
Special Provisions
NC has specific provisions for: children with extraordinary medical expenses, private school tuition when both parents agree or previously enrolled the child, travel expenses for long-distance visitation, and uninsured medical expenses. These are divided proportionally between parents. NC child support continues until the child turns 18, or through high school graduation if under age 20.
Modification and Enforcement
NC allows modification when there has been a substantial change in circumstances. A 15% change in the calculated amount is generally considered substantial. Enforcement tools include income withholding, tax interception, license suspension, contempt, liens, bank levies, and credit reporting. NC charges 8% annual interest on arrearages.
NC uses Worksheet A for primary custody, Worksheet B for joint (123+ overnights each)
North Carolina Child Support Schedule
Below is a representative sample of the North Carolina child support schedule showing basic monthly obligations:
| Combined Monthly Income | 1 Child | 2 Children | 3 Children | 4 Children | 5 Children |
|---|---|---|---|---|---|
| $1,500 | $282 | $424 | $486 | $526 | $561 |
| $2,500 | $413 | $622 | $712 | $770 | $821 |
| $3,500 | $513 | $771 | $873 | $950 | $1,018 |
| $5,000 | $645 | $969 | $1,095 | $1,193 | $1,279 |
| $7,500 | $843 | $1,256 | $1,408 | $1,544 | $1,661 |
| $10,000 | $1,022 | $1,516 | $1,697 | $1,864 | $2,007 |
| $15,000 | $1,326 | $1,955 | $2,194 | $2,415 | $2,604 |
| $20,000 | $1,578 | $2,298 | $2,590 | $2,856 | $3,084 |
NC Child Support Worksheet A — Primary Custody
Worksheet A is used when one parent has primary physical custody of the child, meaning the child resides with that parent for more than 243 overnights per year (approximately two-thirds of the time). This is the most commonly used worksheet in North Carolina child support cases.
Step-by-Step Worksheet A Calculation
- Determine each parent's gross monthly income from all sources including wages, self-employment, rental income, investments, pensions, and government benefits
- Calculate adjusted gross income by subtracting pre-existing child support obligations, responsibility for other children, and health insurance premiums for the child
- Combine both parents' adjusted gross incomes to find the total available income
- Look up the Basic Child Support Obligation on the NC Guidelines Schedule using the combined income and number of children
- Determine each parent's percentage share by dividing their individual income by the combined income
- Add work-related childcare costs and extraordinary expenses to the basic obligation
- Multiply the non-custodial parent's percentage by the total obligation to get the monthly payment
- Subtract any direct payments the non-custodial parent makes (e.g., health insurance premiums paid directly)
Worksheet A Example
Parent A (custodial) earns $3,000/month adjusted gross income. Parent B (non-custodial) earns $5,000/month. Combined income: $8,000/month. For 2 children, the schedule shows approximately $1,647. Parent B's share: 62.5% x $1,647 = $1,029/month. Add proportional share of childcare ($400 x 62.5% = $250) for a total of approximately $1,279/month.
NC Child Support Worksheet B — Joint/Shared Custody
Worksheet B applies when each parent has the child for at least 123 overnights per year (approximately one-third of the year). This threshold is critical — if one parent has 122 or fewer overnights, Worksheet A applies instead.
Why 123 Overnights Matter
The 123-overnight threshold recognizes that when both parents have substantial custodial time, both households bear significant direct costs for the child. At this level of shared time, the standard Worksheet A calculation would not fairly account for the non-custodial parent's direct expenditures on housing, food, utilities, and other child-related expenses during their custody periods.
Step-by-Step Worksheet B Calculation
- Determine each parent's adjusted gross income using the same income sources and deductions as Worksheet A
- Combine incomes and find the Basic Child Support Obligation from the NC Guidelines Schedule
- Multiply the basic obligation by 1.5 — this adjustment factor accounts for the increased total cost of maintaining the child in two households
- Calculate each parent's theoretical obligation by multiplying the adjusted obligation by their income percentage
- Multiply each parent's obligation by the percentage of time the child spends with the other parent
- Offset the two amounts — the parent with the higher resulting number pays the difference to the other parent
Worksheet B Example
Parent A earns $4,000/month (44.4%), Parent B earns $5,000/month (55.6%). Combined: $9,000. Basic obligation for 1 child: ~$1,100. Adjusted (x 1.5): $1,650. Parent A's share: $1,650 x 44.4% = $733, times Parent B's time (55%) = $403. Parent B's share: $1,650 x 55.6% = $917, times Parent A's time (45%) = $413. Offset: Parent B pays $10/month (the difference). In equal-income situations with 50/50 custody, the payment can be very small or zero.
Choosing Between Worksheet A and B
| Criterion | Worksheet A | Worksheet B |
|---|---|---|
| Overnights with non-custodial parent | 0-122 per year | 123+ per year |
| Custody type | Primary/sole custody | Joint/shared custody |
| Multiplier | None (1.0x) | 1.5x adjustment |
| Calculation method | Direct proportional share | Offset between parents |
| Typical result | Higher payment amount | Lower net payment |
When NC Courts Deviate from Guidelines
North Carolina courts may deviate from the calculated guideline amount when strict application would either fail to meet the reasonable needs of the child or would be unjust or inappropriate. Any deviation requires the court to make written findings of fact.
Common Deviation Factors
- Extraordinary medical expenses for a child with ongoing health conditions or special needs
- Private school or special education costs when both parents previously agreed or the child was already enrolled
- Long-distance travel expenses for parenting time when parents live far apart
- Combined income exceeding the schedule maximum ($30,000/month combined)
- A child's own income or assets that reduce the need for parental support
- Significant debt from the marriage affecting a parent's ability to pay
- Seasonal or irregular income making standard calculations unreliable
Deviations are the exception, not the rule. NC courts apply the guideline presumption strongly, and most orders fall within the calculated range. Parents seeking a deviation should document their reasons thoroughly and present evidence supporting why the standard calculation produces an unfair result.
How to Modify Child Support in North Carolina
North Carolina allows modification of child support when there has been a substantial change in circumstances since the original order. A change that would result in a 15% or greater difference in the calculated support amount is generally considered substantial.
Common Grounds for Modification
- Significant change in either parent's income (job loss, promotion, disability)
- Change in custody or overnights that crosses the 123-overnight threshold
- Child reaching emancipation age or graduating from high school
- Significant change in childcare costs
- Change in health insurance costs or availability
- New support obligations for other children
The NC Modification Process
File a Motion to Modify with the court that issued the original order. Provide current financial affidavits (Form AOC-CV-627) and documentation of changed circumstances. Both parents exchange updated income information. Uncontested modifications typically resolve within 60-90 days. Contested cases may require a hearing. Modifications take effect from the date of filing, not retroactively.
Enforcement of NC Child Support
North Carolina enforces child support through the NC Division of Social Services, Child Support Enforcement Section. The state has robust enforcement tools:
- Income withholding — required for all new orders; employers must comply within 7 days
- Tax refund interception — both federal and NC state refunds
- License suspension — driver's, professional, and recreational licenses
- Contempt of court — up to 30 days imprisonment for willful non-payment
- Property liens — on real estate, vehicles, and financial accounts
- Credit bureau reporting — delinquencies over 60 days are reported
- Passport denial — for arrearages exceeding $2,500
- Bank account seizure — funds can be frozen and seized
NC charges 8% annual interest on child support arrearages. The state collects approximately $900 million in child support annually through more than 350,000 active cases.
Duration of Child Support in North Carolina
In North Carolina, child support continues until the child reaches age 18, or through high school graduation if the child is still enrolled and under age 20. Support terminates early if the child marries, joins the military, or becomes emancipated.
For children with significant disabilities that prevent self-support, NC courts may order continued support beyond the standard age. Each case is individually evaluated based on the child's specific needs and circumstances.
Tax Implications
Under current federal tax law, child support payments are not tax-deductible for the paying parent and are not taxable income for the receiving parent. The dependency exemption is generally claimed by the custodial parent unless released via IRS Form 8332.