Reviewed August 2026
Child Support in Delaware
Delaware calculates child support with a formula set out in Family Court Civil Rules 500 through 510. Most lawyers call it the Melson formula, since it gives each parent a self-support allowance before splitting the cost of raising the children. Family Court's own instructions call the formula a rebuttable presumption. The calculated amount applies unless the court finds it unfair or against the child's best interest. Every order needs a support calculation attached, even if the parents agree on a different number. Delaware's Family Court hears child support cases. The Division of Child Support Services, the state's IV-D agency, helps parents apply for services, run the calculation, and enforce an order that already exists.
Virdix's document-preparation product currently prepares divorce paperwork for California and Florida cases. This page explains how child support works under Delaware law for people researching before they file. It is not legal advice, and Virdix does not prepare or file Delaware paperwork. See how Virdix works for California divorces.
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The Melson formula: self-support allowance first
Unlike an income shares state, Delaware's formula starts by giving each parent a self-support allowance. That is the minimum income Family Court considers necessary for a parent to stay in the workforce, before anything is allocated to the children. After deducting taxes, health insurance, and the self-support allowance from gross income, what is left is each parent's net available income for primary support. The formula then applies a primary support allowance based on the number of children. It divides that cost between the parents based on their share of the remaining net income. It can add a standard of living adjustment, called a SOLA, when a paying parent's income exceeds what primary support alone requires.
Applying through the Division of Child Support Services
The Division of Child Support Services is Delaware's IV-D agency, created under Title 13 of the Delaware Code. It accepts payments made under a Family Court order, issues the medical support notices required in federal IV-D cases, and coordinates enforcement. A parent can apply for DCSS services online or by contacting the division directly. DCSS can help with paternity establishment, setting up a new order, or collecting on one that already exists.
Who hears a Delaware child support case
Delaware's Family Court has jurisdiction over child support matters statewide. Title 13, sections 513 and 514 of the Delaware Code let the court order periodic or lump-sum support. The court must weigh each parent's health, income, and earning capacity, plus the family's standard of living before the separation. It uses an automated version of the calculation, available on its website, along with Formula Instructions that walk through each line by hand.
Modifying an existing order
A petition to modify filed within two and a half years of the last support order must spell out, with particularity, a substantial change in circumstances. That change cannot be caused by the requesting parent's own voluntary or wrongful conduct. The court will not modify the order unless the recalculated amount changes by more than 10 percent. After two and a half years, neither the particularity requirement nor the 10 percent threshold applies. A revision to the formula itself is not, on its own, grounds for modification.
Enforcement tools
Delaware's Division of Child Support Services can pursue income withholding through employers and issue medical support notices in IV-D cases. It can use administrative hearings to resolve some enforcement disputes without a full court hearing. A parent who violates a support order can be brought before the Family Court on a rule to show cause. The court can hold that parent in contempt. Retroactive support in a new case is presumed for up to six months before filing, and can extend further with evidence. A modification generally cannot reach back further than shortly after the other parent was served.
Sources: Delaware Family Court, Instructions for Child Support Calculation (Form 509i, 2026), Delaware Code, Title 13, Chapter 5 (support order authority), Delaware Family Court, Child Support Calculator page, Delaware Division of Child Support Services (DCSS)
Not independently confirmed
- Whether Family Court Civil Rules 500-510 themselves use the term 'Melson formula' or only describe the mechanics (the term is standard in outside legal literature)
- Current DCSS online application URL and any application fee
Child Support in Delaware: frequently asked questions
Does Delaware use the income shares model for child support?+
No. Delaware uses a formula, commonly called the Melson formula, set out in Family Court Civil Rules 500 through 510. It gives each parent a self-support allowance before allocating a primary support amount for the children. It can also add a standard of living adjustment when a paying parent's income is high enough.
How do I apply for child support services in Delaware?+
You apply through Delaware's Division of Child Support Services, the state's IV-D agency created under Title 13 of the Delaware Code. DCSS can help establish paternity, set up a new support order, issue the required medical support notices, and enforce or collect on an order that already exists.
What court hears child support cases in Delaware?+
Delaware's Family Court hears child support matters statewide. Title 13, sections 513 and 514 of the Delaware Code let the court set periodic or lump-sum support. The court must weigh each parent's income, earning capacity, and the family's standard of living before separation.
When can I get my Delaware child support order modified?+
Within two and a half years of the last order, you must spell out with particularity a substantial change in circumstances, not caused by your own voluntary or wrongful conduct. The recalculated amount must also differ by more than 10 percent. After two and a half years, neither requirement applies, so a later modification is easier to bring.
Is there an official Delaware child support calculator?+
Yes. Delaware's Family Court publishes an automated online calculator and manual worksheets. It also provides detailed Child Support Formula Instructions that walk through each line of the self-support-allowance calculation.
What happens if a parent stops paying child support in Delaware?+
The Division of Child Support Services can pursue income withholding and use administrative hearings for certain enforcement disputes. A parent can also be brought before the Family Court on a rule to show cause, and held in contempt for failing to comply with a support order.
This page is general information about child support in Delaware, not legal advice for your situation. Laws, fees, and procedures change over time; confirm current details with Delaware's own courts before relying on anything here. Virdix is not a law firm and is not licensed to practice law in Delaware. Virdix does not prepare or file Delaware divorce paperwork. It is not a substitute for an attorney licensed in Delaware.
More Delaware divorce guides
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