How Delaware Calculates Child Support
Delaware is one of only three states in the country that uses the Melson formula for child support. The other two are Hawaii and Montana. Delaware Family Court Civil Rule 52 governs child support proceedings in the state. The Melson formula is more sophisticated than the standard Income Shares model — it is designed to ensure that basic needs are met first, for both the children and the parents, before any additional obligation is calculated.
Understanding the Melson formula requires following three sequential steps. Each step builds on the one before it. The formula uses net income rather than gross income, which is another key difference from most states.
The Delaware Melson Formula — Three Steps
Step 1: Calculate each parent's Self-Support Reserve.
Before calculating how much a parent owes for their children's support, Delaware first identifies how much each parent needs for their own basic living expenses. This is called the Self-Support Reserve (SSR). The SSR is a fixed monthly dollar amount set by Delaware's guidelines. It represents the minimum income a parent needs to meet their own basic needs. In 2026, the SSR in Delaware is approximately $1,000 per month for most parents, though courts may adjust this based on actual circumstances.
Start with each parent's net monthly income — gross income minus federal taxes, Delaware state income taxes (2.2 percent to 6.6 percent depending on income), Social Security, and Medicare. Subtract the SSR. What remains is each parent's available income for child support purposes.
Step 2: Calculate the children's Primary Support need.
Delaware sets a per-child monthly support amount that covers each child's basic needs. This Primary Support amount is established in the guidelines and is tied to the number of children. Both parents contribute proportionally to the children's Primary Support based on their available income after the SSR deduction. This portion of the obligation ensures the children's basic needs are funded first.
Step 3: Apply the Standard of Living Adjustment (SOLA).
After the children's basic needs are covered, Delaware allows children to share in a higher standard of living when parents can afford it. The SOLA is calculated as a percentage — typically 10 percent — of the paying parent's remaining net income after the SSR and Primary Support obligations are deducted. The SOLA increases the total monthly obligation above the bare-minimum Primary Support amount.
The final monthly child support payment is the paying parent's share of the Primary Support plus their SOLA contribution.
Why the Melson Formula Is Different
The Melson formula has two advantages over the Income Shares model. First, it protects lower-income parents from being ordered to pay more than they can reasonably afford after meeting their own basic needs. A parent cannot be ordered into poverty to pay child support. Second, it allows children of higher-income parents to benefit from that higher income beyond just their basic needs — the SOLA scales with the paying parent's disposable income.
The trade-off is complexity. The Melson formula has more moving parts than Income Shares, and the result depends heavily on accurate net income figures and the current SSR and Primary Support amounts set by Delaware's guidelines.
What Counts as Income in Delaware
Delaware uses gross income as the starting point before net income deductions. Courts include wages, salaries, commissions, bonuses, overtime, self-employment income, rental income, pension and retirement distributions, Social Security benefits, SSDI payments, unemployment compensation, and workers' compensation.
Courts can impute income to a parent who is voluntarily unemployed or working below their capacity. Delaware courts evaluate work history, qualifications, and the local employment market when determining an appropriate imputed income level.
Delaware also excludes means-tested public assistance programs such as Temporary Assistance for Needy Families (TANF) from the income calculation. SSDI, however, does count as income.
Step-by-Step: How to Use This Calculator
Step 1 — Calculate your net monthly income. Start with gross monthly income. Subtract federal income tax (based on your filing status and effective rate). Subtract Delaware state income tax (progressive rates from 2.2 percent to 6.6 percent). Subtract Social Security and Medicare. The result is your net monthly income.
Step 2 — Note the Self-Support Reserve. The calculator applies the current SSR automatically. Your available income for child support is your net income minus the SSR.
Step 3 — Calculate the other parent's net monthly income using the same method.
Step 4 — Enter the number of children. Delaware's Primary Support amount per child determines how the Step 2 calculation works.
Step 5 — Enter your parenting time. Count overnights per year and divide by 365.
Step 6 — Add healthcare costs. Enter the monthly children's health insurance premium.
Step 7 — Review all three steps in the breakdown. The calculator shows you the SSR deduction, the Primary Support allocation, and the SOLA calculation separately.
Parenting Time Adjustments in Delaware
Delaware adjusts child support for parenting time when the paying parent has significant overnights with the children. As parenting time increases, the paying parent's direct spending on the children during that time is factored into the formula. Near equal parenting time results in a substantially reduced obligation.
Courts in Delaware also consider the specific needs of the children when determining whether any adjustment or deviation from the Melson result is appropriate.
Add-On Expenses in Delaware
Healthcare premiums and childcare costs are handled within Delaware's formula and allocated proportionally based on each parent's available income after the SSR deduction. Extraordinary medical costs and other necessary expenses may be added and split proportionally by court order.
Reading Your Results
The Delaware results section is more detailed than most states. You will see the gross income for both parents, the net income after tax deductions, the Self-Support Reserve deduction for each parent, the available income figure, the Primary Support allocation, the SOLA calculation for the paying parent, and the final monthly obligation.
Pay close attention to the available income figure — this is the key driver of both Step 2 and Step 3. If a parent's net income is close to the SSR amount, their obligation may be limited to a minimal amount to protect their self-support.
After You Get Your Estimate
Delaware Family Court follows the Melson formula in all standard cases. Deviation is allowed when the formula produces a result that is inequitable given the specific circumstances. Courts consider the totality of both parents' financial situations, the needs of the children, and any special circumstances.
Modification is available when there has been a material change in circumstances — typically at least a 10 percent change in the calculated obligation. Given the Melson formula's complexity, even a moderate income change can have a nonlinear effect on the final obligation because of how the SSR and SOLA interact.
A licensed Delaware family law attorney familiar with the Melson formula can walk you through your specific numbers — many offer a free first call.