North Carolina Child Support Guidelines Explained

North Carolina calculates child support using the income shares model, which bases the support obligation on the combined income of both parents and the number of children. The legal authority for child support is found in N.C. Gen. Stat. 50-13.4, and the detailed calculation methodology is set forth in the North Carolina Child Support Guidelines, which are promulgated by the Conference of Chief District Court Judges and adopted as an administrative rule.

The Guidelines produce a presumptive support amount. The court must follow the Guidelines unless it makes specific written findings that applying them would be unjust or inappropriate. Understanding how the calculation works — including income definitions, adjustments, and deviation grounds — is essential for any parent navigating a child support case in North Carolina.

For a general overview of child support calculations nationwide, see our guide on how child support is calculated.

The Income Shares Model

North Carolina’s income shares approach is built on the principle that a child should receive the same proportion of parental income they would have received if the parents lived together. The calculation follows these general steps:

1. Determine each parent’s gross income.
2. Calculate each parent’s adjusted gross income after certain deductions.
3. Combine both parents’ adjusted gross incomes to find the combined adjusted gross income.
4. Use the Guidelines schedule to determine the basic child support obligation for the combined income level and number of children.
5. Allocate the obligation between the parents in proportion to each parent’s share of the combined income.
6. Apply adjustments for health insurance premiums, childcare costs, and extraordinary expenses.
7. Determine the final support amount owed by the noncustodial parent.

The Guidelines provide three different worksheets depending on the custody arrangement, which significantly affects the calculation.

Gross Income Definition

The Guidelines define gross income broadly to include income from virtually all sources:

• Salaries, wages, commissions, bonuses, and overtime
• Self-employment income (net of ordinary and necessary business expenses)
• Severance pay
• Social Security benefits, veterans’ benefits, and disability payments
• Unemployment insurance benefits
• Workers’ compensation benefits
• Alimony and post-separation support received from any source
• Rental income
• Interest, dividends, and investment income
• Trust income and annuities
• Pensions and retirement benefits being received
• Military pay and allowances

Income that is not included in gross income under the Guidelines includes means-tested public assistance benefits (such as TANF, SSI, and food stamps) and the income of a parent’s new spouse or partner.

Self-Employment Income

Self-employment income requires special attention in North Carolina child support cases. The Guidelines use gross receipts minus ordinary and necessary business expenses as the starting point. However, the court may scrutinize claimed deductions to ensure they are legitimate business expenses rather than personal expenditures. Depreciation, home office deductions, and other non-cash expenses may be added back to income when calculating child support because they do not reduce the parent’s actual cash available for support.

The Three Guidelines Worksheets

North Carolina uses three different worksheets depending on the parenting time arrangement:

Worksheet A: Primary Custody

Worksheet A applies when one parent has primary physical custody — meaning the child lives with that parent for 243 or more overnights per year. This is the most commonly used worksheet. The noncustodial parent pays the calculated support amount to the custodial parent.

Worksheet B: Shared Custody (123+ Overnights)

Worksheet B applies when each parent has the child for at least 123 overnights per year. This worksheet recognizes that both parents incur substantial direct costs for the child and adjusts the support calculation accordingly. The support obligation is offset to account for the noncustodial parent’s direct expenditures during their parenting time, and the higher-income parent typically pays the difference.

The 123-overnight threshold is a critical number in North Carolina child support cases. Parents who are close to this threshold should understand that even a small change in the parenting schedule — a few overnights one way or the other — can shift the case from Worksheet A to Worksheet B and significantly change the support amount.

Worksheet C: Split Custody

Worksheet C applies in split custody arrangements where each parent has primary custody of at least one of the children. This worksheet calculates separate obligations for each parent and offsets them.

Adjustments to the Basic Obligation

After the basic child support obligation is determined, the Guidelines require adjustments for three categories of expenses:

Health Insurance Premiums

The cost of the child’s portion of health insurance premiums is added to the basic obligation and allocated between the parents in proportion to their income shares. The court typically orders the parent with access to more affordable coverage to maintain the insurance.

Work-Related Childcare Costs

Childcare expenses incurred by either parent due to employment or job search are added to the basic obligation and shared in proportion to income. The Guidelines require that childcare costs be reasonable and necessary, and they account for any tax credits the parent receives for childcare.

Extraordinary Expenses

The Guidelines allow adjustments for extraordinary expenses, which may include:

• Extraordinary medical, dental, or mental health expenses not covered by insurance
• Special educational needs
• Transportation costs for visitation in long-distance cases

These expenses are added to the basic obligation and shared between the parents based on their income percentages.

Deviation Factors

The Guidelines establish a presumptive support amount, but the court may deviate from the Guidelines if it finds that applying them would be unjust or inappropriate. Under NCGS 50-13.4(c), the court must make written findings to justify a deviation. Factors that may support deviation include:

• The child’s special needs, including extraordinary medical, educational, or psychological expenses
• A parent’s extraordinarily high or low income that falls outside the Guidelines schedule
• Educational expenses for the child, including private school tuition in certain circumstances
• Prior support obligations for children from other relationships
• Assets and liabilities of the parties that make the Guidelines amount inequitable
• The child’s own income or independent resources
• Seasonal or irregular income that makes the Guidelines amount unrepresentative of the parent’s actual financial capacity
• Other factors the court deems relevant to the child’s best interest

When the court deviates, it must state in writing the amount that would have been required under the Guidelines, the basis for the deviation, and how the deviation serves the child’s best interest.

Imputed Income

When a parent is voluntarily unemployed or voluntarily underemployed, the court may impute income to that parent based on their earning capacity. This prevents a parent from reducing their support obligation by choosing not to work or by working below their capacity.

To impute income, the court considers:

• The parent’s recent work history and employment record
• Qualifications, education, and training
• The availability of jobs in the parent’s field and geographic area
• The parent’s age, physical and mental health, and ability to work
• Any legitimate reasons for reduced employment (such as caring for a very young child or a disability)

Income is typically imputed at the level the parent is capable of earning based on their skills and work history. At a minimum, income may be imputed at minimum wage for full-time employment (40 hours per week).

Modification of Child Support

Child support orders in North Carolina are not permanent and may be modified when there is a substantial change in circumstances. Under NCGS 50-13.7, either parent may seek modification based on:

• A significant increase or decrease in either parent’s income
• A change in the child’s needs (medical, educational, or otherwise)
• A change in the custody or parenting time arrangement
• A change in childcare or health insurance costs
• The child reaching the age of emancipation (generally 18, or through high school graduation if the child is still in school and under 20)

North Carolina also allows modification when a recalculation under the current Guidelines shows a difference of 15% or more from the existing order, which creates a presumption that a change in circumstances exists.

For more on the modification process, see our article on modifying child support.

What to Do Next

If you are dealing with a child support matter in North Carolina — whether establishing a new order, responding to a support claim, or seeking a modification — the following steps will help protect your interests:

1. Gather complete financial documentation. Collect recent tax returns, pay stubs, proof of all income sources, and records of health insurance and childcare costs. The Guidelines calculation depends on accurate income information.
2. Track your overnights carefully. The number of overnights determines which worksheet applies. Maintain a detailed calendar showing actual parenting time.
3. Understand the 123-overnight threshold. If your parenting schedule is near this number, know that small changes can significantly affect the support calculation.
4. Document extraordinary expenses. If your child has special medical, educational, or other needs, keep detailed records of those costs to support an adjustment or deviation argument.
5. Do not voluntarily reduce your income. Quitting a job, reducing hours, or turning down promotions to lower your support obligation can result in income imputation and potential sanctions.
6. Consult with a North Carolina family law attorney. The Guidelines calculation involves detailed income analysis and multiple adjustments. An experienced attorney can ensure the calculation is accurate and advocate for a fair result.

Schedule a free consultation to discuss your North Carolina child support questions with an experienced family law attorney.

Frequently Asked Questions

What factors are used to calculate child support?

Child support calculations typically consider both parents’ gross income, the number of children, the custody arrangement (parenting time), healthcare costs, childcare expenses, and any special needs of the child. Most states use either an income shares model or percentage of income model.

Can child support be different from the guideline amount?

Yes. Courts can deviate from the standard guidelines in certain circumstances, such as when a child has special needs, when one parent has extraordinarily high or low income, or when the existing arrangement involves unusual expenses. Either parent can request a deviation with proper justification.

How often can child support be reviewed?

Most states allow parents to request a review every two to three years or whenever there is a substantial change in circumstances. Changes that may warrant a review include significant income changes, changes in custody arrangements, or changes in the child’s needs.

How is child support calculated for self-employed parents?

For self-employed parents, courts look at gross receipts minus ordinary business expenses to determine income. Courts may impute income if a parent appears to be underreporting earnings or voluntarily reducing income. Tax returns, bank statements, and business records are key evidence.