In Delaware, child support ends when the child turns 18 years old. If the child is still enrolled in high school at age 18, support continues until the child receives a high school diploma or turns 19, whichever comes first. Delaware Code title 13, section 517 governs termination, and past-due arrearages survive termination indefinitely. Delaware does not require parents to pay child support through college.
Key Facts: Delaware Child Support Termination
| Factor | Details |
|---|---|
| Age of Termination | 18 (or 19 if still in high school) |
| Governing Statute | Del. Code tit. 13, § 517 |
| High School Extension | Support continues to diploma or age 19 |
| College Support | Not required by law |
| Emancipation Statute | No formal statute; case-by-case |
| Filing Fee (Divorce Petition) | $165 + $10 court security fee |
| Residency Requirement | 6 months in Delaware |
| Support Formula | Melson Formula (Income Shares variant) |
| Arrearages After Termination | Remain enforceable until paid in full |
| Enforcement Agency | Division of Child Support Services (DCSS) |
When Does Child Support End in Delaware by Law
Child support in Delaware terminates automatically when the last minor child reaches age 18 under Del. Code tit. 13, § 517. If the child is still attending high school at 18, the obligation extends until the child graduates or turns 19, whichever occurs first. This rule applies to all child support orders entered by Delaware Family Court.
The duty to support arises under Del. Code tit. 13, § 501, which places the financial obligation equally on both parents. Section 501(a) establishes that the duty applies to children under 18, while section 501(d) extends it to children over 18 who are enrolled in high school and likely to graduate. Delaware law does not distinguish between children born during marriage and those born outside marriage for purposes of support duration.
Delaware Family Court handles all child support matters across three counties. New Castle County Family Court can be reached at 302-255-0300, Kent County at 302-672-1000, and Sussex County at 302-855-7400. The court website at courts.delaware.gov/family/support provides forms, calculators, and filing instructions for parents seeking modification or termination of support orders.
The High School Extension Rule in Delaware
Delaware extends child support past age 18 only when the child is enrolled in high school and is reasonably expected to graduate before turning 19. Under Del. Code tit. 13, § 501(d), both parents must continue supporting a child over 18 who remains in secondary school. This extension caps at age 19 regardless of graduation status.
The high school extension in Delaware applies automatically and does not require a separate court motion. The paying parent continues making payments under the existing order until the child graduates or reaches 19. If the child drops out of high school before turning 19, the support obligation terminates at that point. Parents who believe the extension should not apply must file a petition with Delaware Family Court to modify the existing order, citing evidence that the child is no longer enrolled or unlikely to graduate.
This provision distinguishes Delaware from states like Mississippi, where child support ends at 21, or New York, which extends support to age 21. Delaware's approach aligns with the majority of states that use 18 as the baseline termination age, with the high school exception serving as a narrow safeguard rather than a broad extension.
Delaware Does Not Require College Support
Delaware courts cannot order a parent to pay child support for a child attending college or university. No provision in Del. Code tit. 13, Chapter 5 authorizes judges to extend support for post-secondary education. Once a child graduates high school or turns 19, the legal obligation ends completely. This makes Delaware one of approximately 34 states that do not mandate college support contributions.
Parents can voluntarily agree to share college expenses as part of a divorce settlement or separation agreement. When both parents sign such an agreement and the court incorporates it into the final order, the terms become enforceable. However, a judge cannot impose college support over a parent's objection. Parents negotiating divorce settlements should address college costs explicitly if they want any post-majority financial arrangement for their children.
States that do require college support include Indiana (up to age 19), Missouri (up to age 21 if enrolled), and New Jersey (no specific age cap if the child is still a dependent student). Delaware parents concerned about college funding should consider establishing 529 savings plans or including college contribution clauses in their separation agreements as a planning strategy.
How to Terminate a Child Support Order in Delaware
A child support order in Delaware terminates automatically when the child turns 18 (or 19 under the high school rule) per Del. Code tit. 13, § 517. The paying parent does not need to file a motion for termination when the child ages out. However, if payments are collected through income withholding via the Division of Child Support Services (DCSS), the parent should contact DCSS to stop the wage garnishment after the obligation ends.
Termination before age 18 requires a court order. A parent seeking early termination must file a petition with Delaware Family Court and demonstrate one of the following circumstances:
- The child has married, which emancipates the child under Delaware common law
- The child has enlisted in active-duty military service
- The child has become financially self-supporting and is living independently
- Custody of all children has transferred to the paying parent through court order or written agreement
- The child has died
The filing fee for a divorce petition in Delaware Family Court is $165 plus a $10 court security fee, totaling $175. Modification petitions for child support may carry separate fees. As of March 2026, parents should verify current fees with the Family Court Clerk or at courts.delaware.gov/help/fees/familyfiling.aspx. Fee waivers are available through an Affidavit in Support of Application to Proceed In Forma Pauperis for parents who demonstrate financial hardship.
Emancipation and Early Termination of Child Support in Delaware
Delaware has no formal emancipation statute, making it one of approximately 15 states without a codified emancipation process. Minors seeking emancipation must petition Delaware Family Court, which decides each case individually. The court considers factors including whether the minor is at least 16 years old, lives separately from parents, earns sufficient income, and demonstrates the ability to manage personal affairs.
When a Delaware court grants emancipation, the child support obligation terminates because the child is no longer considered a dependent minor. Marriage and military enlistment also trigger emancipation by operation of law, ending the support duty automatically. However, these situations are relatively uncommon for children under 18.
Emancipation does not affect past-due child support arrearages. Under Del. Code tit. 13, § 517, unpaid support that accrued before emancipation remains a valid debt. The custodial parent or DCSS can continue enforcement actions including wage garnishment, tax refund intercepts, and professional license suspension until all arrearages are satisfied.
How Delaware Calculates Child Support Using the Melson Formula
Delaware uses the Melson Formula to calculate child support, a method developed by Delaware Family Court Judge Elwood F. Melson Jr. in the 1970s. The formula is codified in Delaware Family Court Civil Rules 500 through 510 and operates as a rebuttable presumption under Del. Code tit. 13, § 514. Courts must apply the calculated amount unless doing so would be unjust or contrary to the child's best interest.
The Melson Formula differs from the standard Income Shares Model used by most states in one critical way: it first ensures each parent retains a self-support allowance before calculating the child's share. For 2024, this self-support reserve was set at $1,510 per month. The formula follows three steps:
- Calculate each parent's net income after taxes and mandatory deductions
- Subtract the self-support allowance ($1,510/month) from each parent's net income
- Apply the standard of living adjustment (SOLA) to allocate remaining income for the child's needs
The formula accounts for health insurance premiums, childcare costs, and extraordinary medical expenses. Delaware Family Court provides a child support calculator worksheet (Form 509) at courts.delaware.gov/family/support/forms.aspx. The entire Melson Formula is scheduled for a comprehensive review in 2026, which may result in updated guideline amounts and self-support thresholds.
Child Support Arrearages Survive Termination in Delaware
Past-due child support in Delaware does not disappear when the child turns 18 or 19. Under Del. Code tit. 13, § 517, arrearages remain legally enforceable until the full balance is paid. Delaware has no statute of limitations on child support debt collection, meaning a parent can pursue unpaid support for decades after the child reaches adulthood.
The Division of Child Support Services (DCSS), established under Del. Code tit. 13, Chapter 22 (sections 2201 through 2215), enforces child support obligations through multiple mechanisms:
- Income withholding orders sent directly to the obligor's employer
- Interception of federal and state tax refunds
- Suspension of driver's licenses under Del. Code tit. 13, § 520
- Suspension of professional and occupational licenses
- Passport denial for arrearages exceeding $2,500 (federal enforcement)
- Reporting to credit bureaus, affecting the obligor's credit score
- Contempt of court proceedings, which can result in fines or incarceration
A parent who owes arrearages cannot avoid payment by claiming the child is now an adult. Delaware courts treat child support debt with the same seriousness as any other court-ordered obligation. Interest may accrue on unpaid balances depending on the terms of the original order.
Modifying Child Support Before Termination in Delaware
Either parent can petition Delaware Family Court to modify a child support order at any time by demonstrating a substantial change in circumstances. Common grounds for modification include job loss, significant income increase or decrease, changes in custody arrangements, or changes in the child's medical or educational needs. The court recalculates support using the Melson Formula based on current financial information.
Delaware Family Court Civil Rules require both parties to submit updated financial disclosures when a modification is requested. The court compares the proposed new amount against the existing order. If the recalculated amount differs by 10% or more from the current order, the court generally presumes that a material change in circumstances has occurred.
DCSS also conducts periodic reviews of child support orders, typically every 3 years, to determine whether modification is appropriate. Either parent can request a review through DCSS without hiring an attorney. The review process evaluates current income, employment status, and the child's needs. If DCSS determines that the order should be adjusted, it files the modification petition with the court on the parent's behalf at no cost.
When Does Child Support End in Delaware vs. Neighboring States
| State | Termination Age | College Support Required | High School Extension | Emancipation Statute |
|---|---|---|---|---|
| Delaware | 18 | No | Yes, to 19 | No formal statute |
| Pennsylvania | 18 | No | Yes, to 18 if enrolled | Yes |
| Maryland | 18 | No | Yes, to 19 | No formal statute |
| New Jersey | 19 | Yes (case law) | Yes, to 19 | Yes |
| New York | 21 | Yes (discretionary) | N/A (already 21) | Yes |
Delaware's child support termination age of 18 places it among the most common termination ages nationally. Approximately 28 states end support at 18, while states like New York (21), Mississippi (21), and Nebraska (19) extend the obligation further. Delaware's refusal to mandate college support aligns with the national majority but contrasts sharply with neighboring New Jersey, where courts routinely order college contributions based on the landmark Newburgh v. Arrigo decision.
Residency Requirements for Delaware Family Court
At least one spouse must have resided in Delaware for a minimum of 6 months immediately before filing a divorce or family court action under Del. Code tit. 13, § 1504. Military personnel stationed in Delaware for 6 or more months also satisfy the residency requirement. Filing occurs in the county where either the petitioner or respondent resides: New Castle County (Wilmington), Kent County (Dover), or Sussex County (Georgetown).
For child support modifications or termination petitions specifically, the parent filing must establish that Delaware Family Court has jurisdiction over the matter. If the original support order was entered in another state, the Uniform Interstate Family Support Act (UIFSA) governs whether Delaware can modify the order. Generally, Delaware can modify an out-of-state order only if neither parent nor the child still resides in the state that issued the original order, or if all parties consent to Delaware jurisdiction.
Frequently Asked Questions
At what age does child support end in Delaware?
Child support in Delaware ends when the child turns 18 under Del. Code tit. 13, § 517. If the child is still in high school at 18, support extends until graduation or age 19, whichever comes first. This termination occurs automatically without requiring a court filing.
Does Delaware require parents to pay child support through college?
Delaware does not require parents to pay child support for college-age children. No Delaware statute authorizes courts to order post-secondary education support. Parents can voluntarily agree to share college costs in a separation agreement, which becomes enforceable if incorporated into a court order, but judges cannot impose this obligation.
Can child support end before age 18 in Delaware?
Child support can end before age 18 in Delaware if the child becomes emancipated through marriage, military enlistment, or a court determination of self-sufficiency. Custody transfer to the paying parent also terminates the obligation. The parent seeking early termination must petition Delaware Family Court for a modification.
What happens to unpaid child support when the child turns 18 in Delaware?
Unpaid child support arrearages in Delaware survive the child's 18th birthday and remain enforceable indefinitely under Del. Code tit. 13, § 517. DCSS can continue wage garnishment, tax intercepts, license suspensions, and contempt proceedings until all past-due amounts are paid in full.
How is child support calculated in Delaware?
Delaware uses the Melson Formula, codified in Family Court Civil Rules 500-510, which first reserves a self-support allowance of $1,510 per month (2024 figure) for each parent before calculating the child's share. The formula considers both parents' net incomes, health insurance costs, childcare expenses, and a standard of living adjustment.
Can I modify child support in Delaware before it terminates?
Either parent can petition Delaware Family Court to modify child support by showing a substantial change in circumstances such as job loss, income change, or custody modification. If the recalculated Melson Formula amount differs by 10% or more from the current order, the court generally presumes modification is warranted. DCSS also reviews orders every 3 years.
Does Delaware have a formal emancipation process for minors?
Delaware has no formal emancipation statute. Minors seeking emancipation must petition Family Court, which evaluates each case individually. Courts consider whether the minor is at least 16, lives independently, earns sufficient income, and can manage personal affairs. Marriage and military service trigger automatic emancipation.
What is the filing fee for child support actions in Delaware?
The filing fee for a divorce petition in Delaware Family Court is $165 plus a $10 court security fee, totaling $175. As of March 2026, verify current fees for specific child support modification or termination petitions with the Family Court Clerk. Fee waivers are available for parents who demonstrate financial hardship.
Who enforces child support orders in Delaware?
The Division of Child Support Services (DCSS), established under Del. Code tit. 13, Chapter 22, enforces child support orders in Delaware. DCSS uses income withholding, tax refund intercepts, license suspensions, passport denial for arrearages over $2,500, and contempt proceedings. DCSS services are available to all parents regardless of income.
Can Delaware modify a child support order from another state?
Delaware can modify an out-of-state child support order under the Uniform Interstate Family Support Act (UIFSA) only if neither parent nor the child still resides in the issuing state, or if all parties consent to Delaware jurisdiction. At least one spouse must meet Delaware's 6-month residency requirement under Del. Code tit. 13, § 1504.
Disclaimer: This guide provides general legal information about when child support ends in Delaware as of March 2026. It is not legal advice. Child support laws and court fees are subject to change. Verify current filing fees with the Delaware Family Court Clerk. Consult a licensed Delaware family law attorney for advice specific to your situation.