Delaware Child Support — Calculator, Laws & Guide (2026)

Understanding Delaware child support laws helps both custodial and non-custodial parents know their rights and obligations. This comprehensive Delaware child support guide covers how payments are calculated, what income counts, when support can be modified, and how orders are enforced. Whether you are going through a divorce, seeking a modification, or dealing with non-payment, this guide explains Delaware’s child support system in plain language.

Verified against Delaware statutes and federal OCSE guidelines as of April 2026.

Delaware Child Support Overview

Delaware uses the Melson formula, a variation of the income shares model that accounts for each parent’s basic self-support needs before calculating the child support obligation. This model ensures both parents can meet their own living expenses while supporting their children.

How Delaware Calculates Child Support

The Delaware child support calculation considers multiple factors:

1. Determine each parent’s gross income — wages, salary, commissions, bonuses, self-employment income, investment income, and other sources.
2. Calculate combined parental income — add both parents’ adjusted gross incomes together.
3. Apply the guideline schedule — Delaware’s guidelines provide a base support amount based on combined income and number of children.
4. Prorate between parents — each parent’s share is proportional to their percentage of the combined income.
5. Add healthcare and childcare costs — these are added to the base amount and divided proportionally.
6. Apply adjustments — parenting time credits, other child obligations, and special circumstances may adjust the final amount.

Online calculator: Use our child support estimator below to calculate your estimated obligation.

What Counts as Income in Delaware

Gross income from all sources: wages, salaries, commissions, bonuses, overtime, self-employment income, rental income, interest, dividends, pensions, Social Security benefits, workers’ compensation, unemployment benefits, and alimony received. Mandatory deductions are subtracted to reach net income: federal and state income taxes, Social Security (FICA), Medicare taxes, and mandatory retirement contributions.

Imputed income: YES. Delaware imputes income (reasonable earning capacity) when a parent is voluntarily unemployed or underemployed, when income is undocumented, when unemployment results from the parent’s own misconduct, or when a parent fails to appear for a hearing or mediation. A parent working fewer than 35 hours per week in an appropriate job is imputed at a minimum of 35 hours per week.

Deviation factors: The Melson Formula amount is a rebuttable presumption. Courts may deviate if the formula result would be inequitable. Under 13 Del.C. § 514, courts consider: (1) the health, relative economic condition, financial circumstances, income, and earning capacity of the parties and children; (2) the manner of living to which the parties were accustomed when living together; and (3) the general equities inherent in the situation. Because the Melson Formula is highly specific and already accounts for many variables, deviations are uncommon and require written findings explaining the specific reason.

Healthcare & Childcare in Delaware Child Support

Health insurance: Health insurance premiums for the child are classified as a Primary Expense under Family Court Civil Rule 503. The cost is added to the basic primary support calculation and allocated between parents in proportion to their respective income shares. All child support orders since 1988 include automatic provisions for health insurance coverage.

Childcare costs: Work-related childcare expenses are a Primary Expense under Rule 503. Costs necessary for either parent to maintain employment, seek employment, or attend job training or education are added to the basic support obligation and allocated between parents by income share. If the custodial parent qualifies for Delaware’s Child Care Assistance-Purchase of Care program (available at 185% of Federal Poverty Level or below), the subsidized portion is excluded from the support calculation.

When Does Delaware Child Support End?

In Delaware, child support generally ends when the child reaches 18. However, if the child is over 18 and still enrolled in high school, support continues until the child receives a high school diploma or turns 19, whichever occurs first. Support may also end before 18 if the child is emancipated through marriage, military enlistment, or court determination of self-sufficiency. Per 13 Del.C. § 517.. However, support may continue or end earlier based on:

• The child graduates from high school (if still a minor)
• The child becomes emancipated (marriage, military service, self-supporting)
• The child has special needs requiring ongoing support
• College support: NO. Delaware courts cannot order a parent to pay child support for a child attending college or university. No statute authorizes post-secondary education support orders. However, parents may voluntarily agree to share college costs in a separation agreement, which becomes enforceable if incorporated into a court order.

Modifying Delaware Child Support

When to modify: Within 2.5 years of the last order: the petitioner must allege with particularity a substantial change of circumstances not caused by the petitioner’s voluntary or wrongful conduct, AND the change must produce more than a 10% difference in the support amount. After 2.5 years: neither the particularity requirement nor the 10% threshold applies — any party may petition. Qualifying changes include: changes in income, health insurance cost or availability, daycare or private school tuition, number of minor children under the order, or number of other minor children to support.

How to modify: File a petition for modification with the Delaware Family Court that issued the original order, or request a review through the Division of Child Support Services (DCSS) at https://dhss.delaware.gov/dcss/modorder/. Evidence of changed circumstances is required. A court hearing determines whether modification is warranted. Modifications take effect from the filing date of the petition and are not retroactive beyond that date (retroactive only to 3 days after summons is mailed).

Either parent can request a modification. Changes are typically not retroactive to before the date of filing the modification request.

Delaware Child Support Enforcement

Delaware has multiple tools to enforce child support orders when a parent fails to pay:

• Automatic income withholding/wage garnishment (mandatory in all orders since 1988; up to 50% of disposable earnings if supporting another spouse/child
• 60% if not
• additional 5% if arrears exceed 12 weeks per federal CCPA); federal and state tax refund intercept; driver’s license suspension; professional license suspension; bank account seizure; liens on real property; passport denial (arrears exceeding 2500); consumer credit reporting of delinquent support; contempt of court proceedings; incarceration until designated amount is paid in serious non-payment cases

Contact Division of Child Support Services (DCSS), under the Delaware Department of Health and Social Services (DHSS) at https://dhss.delaware.gov/dcss/ for enforcement assistance.

Additional Delaware rules: Delaware is one of only three states using the Melson Formula (with Hawaii and Montana), making its calculation methodology unique. The self-support allowance (1570/month in 2026) is adjusted annually based on HHS federal poverty guidelines. The formula includes a built-in Standard of Living Adjustment (SOLA) so children benefit from parental income above subsistence — this is distinctive to the Melson approach. The formula also includes an automatic undue-hardship check to prevent the paying parent’s total obligations across households from being excessive. Private school tuition can be included as a Primary Expense in the calculation. Extracurricular activity costs are generally not included in the guideline calculation but may be addressed separately by the court.

Official Sources & Resources

• Division of Child Support Services (DCSS), under the Delaware Department of Health and Social Services (DHSS): https://dhss.delaware.gov/dcss/
• Federal OCSE: acf.hhs.gov/css
• Cornell LII — Child Support: law.cornell.edu
• Delaware Guidelines Statute: 13 Del.C. §§ 501-514 (substantive child support law, Title 13 Chapter 5); Delaware Family Court Civil Rules 500-510 (Melson Formula calculation rules); 13 Del.C. Chapter 22 (Division of Child Support Services enabling statute)

Last verified April 2026. Contact us if you notice outdated information.

Estimate Your Child Support

Use our free child support estimator to calculate estimated monthly payments. Enter both parents’ incomes, number of children, and custody arrangement to see a personalized breakdown based on your state’s formula.

Related Guides

• Delaware Divorce Process Guide
• Delaware Child Custody Guide
• Delaware Alimony Guide
• All Child Support Guides