Child Support in Delaware: How Much Will You Owe?

Quick answer: it depends on both parents' incomes, how many children you have, and the parenting schedule. The calculator on this page turns those numbers into a real guideline estimate in about a minute. It is an educational estimate, not legal advice, and the judge always sets the final amount. FamilyCourtHelp.com is a self-help resource, not a law firm.

Wondering how much child support you will owe or receive in Delaware? The state uses one formula everywhere, so the same math applies in every county. This page explains how it works, lets you run a live estimate, and links to a dedicated page for each county at the bottom.

Delaware uses the Melson Formula. The court first sets aside a self-support reserve for each parent's basic needs and a primary support amount for the children, then divides any remaining income with a standard-of-living adjustment so children share in the parents' income above subsistence.

What counts as income? Delaware runs the formula on income after certain allowed deductions are taken out. Monthly net income from all sources including wages, self-employment, retirement, Social Security, unemployment, and disability, reduced by federal and state taxes, FICA, mandatory retirement, and a self-support allowance for the parent.

Parenting time matters directly in Delaware: the number of overnights each parent has changes the math itself. Delaware uses a shared-care adjustment, so how much time the child spends with each parent can change the support number. When a parent has substantial overnights, the Melson Formula factors that shared placement into the calculation because each home covers part of the child's day-to-day costs. The more balanced the parenting schedule, the more the formula reflects each parent's direct spending. The official Delaware worksheet applies this adjustment, and the on-page calculator only estimates it.

When does it end? Support generally ends when the child turns 18 or graduates from high school, but not past age 19. Disabled adult children can receive continuing support.

Can the amount change later? Modification petitions can be filed in Family Court or processed administratively through DCSS. Under Family Court Civil Rule 508, a petition filed within 2½ years of the order must particularly allege a substantial change of circumstances not caused by the petitioner's own voluntary or wrongful conduct (exceptions in Rules 501(j) and 506(c)) and show that a new calculation differs by MORE THAN 10%. Filed more than 2½ years after the order, neither of those extra requirements applies.

If payments fall behind, Delaware has real enforcement tools. Delaware DCSS uses immediate income withholding, tax intercept, license suspension, credit reporting, lien recordation, and contempt proceedings in Family Court.

Child support cases in Delaware are generally handled through the state's Family Court, and Delaware Division of Child Support Services (DCSS) runs the state's child support services program. Forms and local practice can vary, so confirm the current details with your local court or the agency.

The calculator on this page is the same live engine behind our full Child Support Calculator. Enter both incomes, the number of children, and the overnight split, and the estimate updates instantly. The full calculator page adds extras like health insurance, child care costs, and saved scenarios.

Bottom line for Delaware: the guideline number comes from incomes, children, and parenting time. Run the estimate on this page, keep your paperwork honest and complete, and let the court confirm the final amount.

Frequently asked questions

How much child support will I owe in Delaware?

There is no flat amount. Delaware uses the Melson Formula model under Del. Fam. Ct. Civ. R. 500-509 (Delaware Child Support Formula), so the number depends on both parents' incomes, the number of children, and the parenting schedule. The calculator on this page gives you a guideline estimate, and the court sets the final amount.

When does child support end in Delaware?

Age 18, or until graduation from high school not past age 19, whichever is later.

Can the child support amount be changed later in Delaware?

Usually yes, when circumstances change enough. Del. Fam. Ct. Civ. R. 508: within 2½ years of the order the petition must particularly allege a substantial change of circumstances that is not the petitioner's own voluntary or wrongful conduct (except under Rules 501(j) and 506(c)) AND a new calculation must differ by MORE THAN 10%. After 2½ years neither the particularity requirement nor the 10% condition applies.

Who handles child support cases in Delaware?

Cases are generally heard in the state's Family Court, and Delaware Division of Child Support Services (DCSS) handles services like locating parents, establishing orders, and collecting payments.