Delaware Child Support Calculator
Estimate Delaware child support for 2026 using the Melson Formula guideline model under Del. Fam. Ct. Civ. R. 500-509 (Delaware Child Support Formula). Enter both parents' incomes and the parenting-time split to see what you may owe or receive.
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.
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.
The cost of the child's health insurance premium is treated as a support add-on in Delaware. The amount one parent pays to cover the children is built into the Melson Formula calculation and shared between the parents in proportion to their income. This keeps the parent who carries the coverage from absorbing the full premium alone. The actual split appears on the official Delaware child support worksheet, not on this estimating tool.
Work-related child care, such as daycare needed so a parent can hold a job, is included as an adjustment in Delaware's Melson Formula. These costs are added to the support figure and divided between the parents based on their incomes. Keep receipts and provider statements, because the court and the Division of Child Support Services will want proof of the actual expense. The on-page calculator is only an estimate, so confirm the child care figure on the official worksheet.
Delaware judges generally follow the Melson Formula result, but a Family Court judge may deviate when the standard number would be unfair given the specific facts of a case. The parent asking for a different amount carries the burden of showing why the guideline figure should not apply, and the judge must explain the reason on the record. Because deviations are case-specific, treat this calculator as an estimate and confirm any departure with the official worksheet or a licensed Delaware attorney.
Frequently asked questions
How is child support calculated in Delaware?
Delaware uses the Melson Formula, set out in the Delaware Child Support Formula at Del. Fam. Ct. Civ. R. 500-509. The court starts with each parent's monthly net income from all sources, then sets aside a self-support reserve for each parent's basic needs and a primary support amount for the children. Any income left above subsistence adds a standard-of-living adjustment so the children share in the parents' earnings. Health insurance, child care, and shared placement adjustments are then applied. The calculator on this page is an estimate, not legal advice, and the official Delaware worksheet controls the final number.
What is the official Delaware child support worksheet, and does it control my case?
Yes. The official Delaware child support worksheet, which applies the Melson Formula under Del. Fam. Ct. Civ. R. 500-509, is the controlling form for setting support. Family Court and the Delaware Division of Child Support Services (DCSS) use this worksheet to run each parent's net income, self-support reserve, the children's primary support amount, and the standard-of-living adjustment. You can find the formula and related material through the Delaware courts at courts.delaware.gov/family/childsupport/. The estimate you get here is a helpful starting point, but only the completed official worksheet, reviewed by the court or a licensed attorney, decides your actual obligation.
What income counts when Delaware figures child support?
Delaware works from monthly net income, not gross. The formula counts income from all sources, including wages, self-employment, retirement, Social Security, unemployment, and disability. From that total, the formula subtracts federal and state taxes, FICA, mandatory retirement contributions, and a self-support allowance for the parent's own basic needs. What remains is the income the Melson Formula uses to set primary support for the children and the standard-of-living adjustment. Because self-employment and side income can be easy to miss, gather pay stubs, tax returns, and profit-and-loss records. This page only estimates the result, so verify your figures on the official worksheet.
How do overnights or 50/50 parenting change support in Delaware?
Delaware applies a shared-care adjustment, so a more balanced schedule can change the support figure. When both parents have substantial overnights, the Melson Formula accounts for the fact that each household directly covers part of the children's costs, which can reduce the amount that moves between parents. A roughly equal 50/50 arrangement does not automatically zero out support, because the formula still compares each parent's net income and the children's needs. The official Delaware worksheet calculates the shared placement adjustment precisely. Use this calculator only to estimate, then confirm the number with the worksheet or a Delaware attorney.
Can a Delaware judge order an amount different from the formula result?
Yes, but not lightly. Family Court judges in Delaware generally follow the Melson Formula result from Del. Fam. Ct. Civ. R. 500-509, since it is designed to protect each parent's basic needs while letting children share in income above subsistence. A judge may deviate when applying the standard number would be unfair given the facts, such as unusual expenses or a special need. The parent requesting the deviation must prove why the guideline figure should not apply, and the judge has to state the reason. Treat any departure as case-specific, and confirm it through the official worksheet or a licensed attorney rather than this estimate.
When does child support end in Delaware?
In Delaware, support generally continues until the child turns 18, or until the child graduates from high school but not past age 19, whichever comes later. If the child is still finishing high school at 18, the obligation can run through graduation up to that age 19 limit. A disabled adult child may receive continuing support beyond these ages in appropriate cases. Support does not always stop on its own, so review your order and the Melson Formula rules under Del. Fam. Ct. Civ. R. 500-509, and contact the Delaware Division of Child Support Services or an attorney to confirm the correct end date for your situation.
How do I change or enforce a Delaware child support order?
You can ask to modify a Delaware order 2½ years after it was entered, or sooner if you show a real and substantial change in circumstances. Modification petitions can be filed in Family Court or processed administratively through the Delaware Division of Child Support Services (DCSS). For collection, DCSS uses immediate income withholding, tax intercept, license suspension, credit reporting, liens, and contempt proceedings in Family Court. These tools also support interstate cases. Because timing and proof matter, use this page only to estimate a new amount, then rely on the official worksheet and DCSS or a licensed Delaware attorney.