Delaware requires both parents to financially support their children until age 18, or age 19 if the child remains enrolled in high school. The state uses the Melson Formula—a unique three-step calculation method employed by only three states—which first ensures each parent retains a self-support allowance, then calculates primary child support based on combined parental income, and finally applies a Standard of Living Adjustment (SOLA) that shares remaining parental income with children. For 2026, Delaware calculates primary support using the formula ($410 per child + $370), applies SOLA percentages ranging from 12% for one child to 21% for three children, and imputes a minimum income of $2,390 per month for voluntarily unemployed parents.
| Key Fact | Delaware 2026 |
|---|---|
| Calculation Method | Melson Formula (unique to 3 states) |
| Child Support Filing Fee | $25 (waived for DCSS clients) |
| Modification Filing Fee | $0 (DCSS clients); verify for private cases |
| Self-Support Allowance | 110% of federal poverty level (~$1,200/month) |
| Imputed Minimum Income | $2,390/month |
| SOLA Percentages | 12% (1 child), 17% (2), 21% (3+) |
| Primary Support Formula | ($410 × number of children) + $370 |
| Support Termination Age | 18 (or 19 if in high school) |
| Governing Statute | 13 Del. Code Chapter 5 |
| Maximum Wage Garnishment | 50-65% of disposable income |
What Is the Delaware Child Support Calculator
The Delaware child support calculator is an official online tool provided by the Delaware Family Court that computes child support obligations using the state's Melson Formula under 13 Del. Code § 501. The calculator requires both parents' gross incomes, number of children, parenting time (overnights per year), health insurance costs, and childcare expenses to produce a presumptive support amount. Delaware courts treat calculator results as a rebuttable presumption—meaning the calculated amount is assumed correct unless a party demonstrates with written findings that deviation is necessary.
The Delaware Courts official child support calculator is available free online. Parents can also use Form 509 (the manual worksheet) with Form 509-I (instructions) to calculate support without the online tool. As of March 2026, the formula values were last updated in February 2026 to reflect current federal poverty guidelines.
How the Melson Formula Works in Delaware
The Melson Formula operates on three foundational principles that distinguish it from the Income Shares Model used by 41 other states. First, both parents deserve a self-support allowance—each parent keeps enough income to meet their own basic needs before any support calculation begins. Second, children's needs take priority over parental lifestyle—after self-support, children's basic needs must be funded before either parent retains additional income. Third, children share in prosperity—when parents have income exceeding basic needs, children receive a percentage through the Standard of Living Adjustment.
Delaware Family Court Judge Elwood F. Melson Jr. developed this formula in the 1970s to address perceived inequities in earlier support calculations. Only Delaware, Hawaii, and Montana currently use the Melson Formula. The calculation process involves six sequential steps: (1) determine each parent's gross income, (2) subtract taxes and mandatory deductions, (3) subtract the self-support allowance, (4) calculate each parent's net available income, (5) apply the primary support obligation based on number of children, and (6) add the SOLA if income remains after basic obligations.
Step-by-Step Guide to Using the Calculator
Accessing Delaware's official child support calculator requires navigating to courts.delaware.gov and locating the Family Court section. The calculator accepts monthly income figures, so convert annual income by dividing by 12. For example, a parent earning $72,000 annually enters $6,000 as monthly gross income. The calculator automatically applies the 2026 self-support allowance (updated each February based on federal poverty guidelines) and computes the appropriate SOLA percentage based on the number of children entered.
Required Information for Accurate Calculations
Before using the Delaware child support calculator, gather: both parents' gross monthly incomes from all sources (wages, bonuses, commissions, rental income, disability, unemployment), health insurance premium costs for the child, work-related childcare expenses, the number of children requiring support, and the number of overnights each parent has per year. The calculator requires actual overnight counts—not percentages—from the current custody order or agreement.
Income Documentation Standards
Delaware courts require specific documentation to verify income figures entered in the calculator. Employed parents must provide the three most recent pay stubs and the previous year's W-2 forms. Self-employed parents need two years of federal tax returns including all schedules, plus profit-and-loss statements. Parents receiving benefits must document unemployment compensation, disability payments, Social Security, or workers' compensation amounts. Military personnel should include their Leave and Earnings Statement showing base pay, BAH (Basic Allowance for Housing), and BAS (Basic Allowance for Subsistence).
Understanding Delaware's Primary Support Calculation
Delaware calculates primary support using a specific formula that establishes baseline child support before any adjustments: multiply $410 by the number of children, then add $370. For one child, primary support equals $780 monthly ($410 + $370). For two children, primary support equals $1,190 ($820 + $370). For three children, primary support equals $1,600 ($1,230 + $370). This primary support amount is then allocated between parents based on their proportionate share of combined net available income.
| Number of Children | Primary Support Calculation | Monthly Amount |
|---|---|---|
| 1 child | (1 × $410) + $370 | $780 |
| 2 children | (2 × $410) + $370 | $1,190 |
| 3 children | (3 × $410) + $370 | $1,600 |
| 4 children | (4 × $410) + $370 | $2,010 |
| 5 children | (5 × $410) + $370 | $2,420 |
The self-support allowance—set at 110% of the federal poverty guideline for a one-person household—protects each parent's ability to maintain basic living standards. For 2026, this allowance is approximately $1,200 per month, though parents should verify the exact amount on Form 509 as it adjusts each February. Net available income equals gross income minus taxes, mandatory deductions, and the self-support allowance.
The Standard of Living Adjustment Explained
Delaware's SOLA ensures children benefit when their parents earn income beyond basic needs. After calculating primary support, the formula examines whether either parent has remaining income after their self-support allowance and their share of primary support. If remaining income exists, a percentage flows to the children as additional support. The SOLA percentage varies by number of children: 12% for one child, 17% for two children, 21% for three children, plus 2% for each additional child beyond three.
For example, if a non-custodial parent has $4,000 in net income after self-support and their primary support share equals $600, the remaining $3,400 would be subject to SOLA. With two children, 17% of $3,400 ($578) would be added to the primary support obligation. The SOLA represents one of the Melson Formula's key innovations—connecting children's support to their parents' actual prosperity rather than capping support at basic needs.
High-Income SOLA Offset
Delaware applies a high-income offset to SOLA calculations when a parent's net income available for SOLA exceeds $15,700. For income above this threshold, 20% of the excess amount is subtracted from the SOLA calculation. This offset acknowledges that at higher income levels, SOLA percentages may produce disproportionately large support amounts. Courts retain discretion to deviate from guideline amounts in high-income cases based on the children's actual needs and historical standard of living.
Parenting Time Adjustments and Overnights
Delaware's child support formula reduces obligations when the paying parent exercises substantial parenting time. Parents with 80-124 overnights per year receive a reduction in their primary support and SOLA obligations—the calculator automatically computes this adjustment. Parents with 125-163 overnights receive a larger reduction. Parents with 164 or more overnights (shared custody) may use a different calculation method that accounts for both parents bearing direct childcare costs.
The overnight count comes from the current custody order or parenting agreement, not actual exercise of parenting time. Delaware courts may impute the ordered number of overnights even if a parent fails to exercise their scheduled time. For parents with irregular schedules (such as those working offshore or in military service), courts may average overnights across a representative period.
Medical Support and Health Insurance
Delaware child support orders include mandatory provisions for children's health insurance coverage. Under 13 Del. Code § 513, courts direct employers to enroll children and withhold premium amounts when a parent has employer-sponsored coverage available. The child support calculator includes health insurance premiums in the total support calculation, allocating premium costs between parents based on their income shares.
If neither parent has access to employer-sponsored health insurance at reasonable cost (defined as no more than 5% of gross income), the court may order one or both parents to obtain coverage through the Health Insurance Marketplace or contribute to cash medical support. Cash medical support covers unreimbursed medical expenses including deductibles, copays, and costs for dental, vision, and orthodontic care not covered by insurance.
Childcare Costs in the Support Calculation
Work-related childcare expenses are added to the primary support obligation and divided between parents according to their income shares. Delaware recognizes childcare as necessary for parents to maintain employment and includes these costs in the support calculation rather than treating them as a separate expense. The calculator accepts monthly childcare costs and allocates them proportionally.
To qualify for inclusion, childcare must be work-related—meaning the parent needs childcare to work, seek employment, or attend job training. Summer camps, extracurricular activities, and educational enrichment programs generally do not qualify unless specifically work-related. Parents should document childcare costs with provider receipts, contracts, or tax records (such as the Child and Dependent Care Credit form).
Income Imputation for Unemployed Parents
Delaware courts impute income to parents who are voluntarily unemployed or underemployed to avoid child support obligations. Under Delaware law, unemployment lasting more than six months creates a rebuttable presumption of voluntary unemployment. The 2026 presumptive minimum income for imputation purposes is $2,390 per month, based on Delaware Department of Labor statewide entry-level wage data at 150 hours per month.
Courts examine a parent's education, training, work history, and local job market conditions when determining imputed income. A parent previously earning $80,000 annually who quits to take a $30,000 job without justification may have income imputed at their former earning capacity. Valid reasons for reduced income include disability, caring for a young child, pursuing education to improve earnings, or documented inability to find comparable employment despite diligent job searching.
Child Support Duration and Termination
Under 13 Del. Code § 517, Delaware child support terminates automatically when all children subject to the order reach age 18. If a child remains enrolled in high school past their 18th birthday, support continues until the child graduates or turns 19, whichever occurs first. Parents do not need to file a motion to terminate support—termination occurs by operation of law when the statutory conditions are met.
Support may also terminate if: custody transfers to the paying parent pursuant to a court order or written parental agreement, the child marries, the child enters military service, or the child becomes legally emancipated. Delaware does not require parents to pay child support for college or post-secondary education—support obligations end at high school graduation or age 19. However, parents may voluntarily agree to contribute to higher education costs in their divorce settlement or separation agreement.
Division of Child Support Services Free Assistance
The Delaware Division of Child Support Services (DCSS) provides free services to parents seeking to establish or enforce child support orders. DCSS handles approximately 80% of Delaware child support cases. Services include: establishing paternity through voluntary acknowledgment or genetic testing, filing support petitions, locating non-custodial parents, enforcing orders through income withholding, and modifying existing orders. Parents using DCSS services pay no filing fees for modification petitions.
To apply for DCSS services, parents can contact: New Castle County at 302-577-7171, Kent County at 302-739-8299, or Sussex County at 302-856-5386. The DCSS Automated Assistance Line operates 24/7 toll-free, while live specialists are available Monday through Friday from 8:00 AM to 4:00 PM. DCSS offices are located in Wilmington (84-A Christiana Road), Dover (Williams State Service Center), and Georgetown (Hudson State Service Center).
Child Support Enforcement in Delaware
Delaware employs multiple enforcement mechanisms when parents fail to pay court-ordered child support. Since 1988, all Delaware child support orders include automatic income withholding, which directs employers to deduct support payments from paychecks before the parent receives their wages. Income withholding takes priority over most other legal claims against wages, except for federal tax liens.
Wage garnishment limits in Delaware follow federal Consumer Credit Protection Act standards: up to 50% of disposable earnings may be garnished if the parent is supporting another spouse or child, up to 60% if not supporting others, and an additional 5% if arrears exceed 12 weeks. Beyond wage garnishment, DCSS enforcement tools include: intercepting federal and state tax refunds, suspending driver's, professional, and recreational licenses, denying or revoking passports for arrears exceeding $2,500, reporting unpaid support to credit bureaus, placing liens on real property, and intercepting unemployment, workers' compensation, and lottery winnings.
Contempt and Criminal Penalties
Parents who willfully refuse to pay child support despite having the ability to pay face contempt of court proceedings. Under 13 Del. Code § 521, a finding of contempt may result in a purge payment requirement, sanctions, or incarceration. Courts may not impose jail time unless the parent had actual clear notice of the support order and demonstrably had the ability to pay but willfully failed to comply.
Federal law imposes criminal penalties for child support non-payment: failure to pay for four consecutive months constitutes a federal misdemeanor, while failure for eight months or longer becomes a federal felony. Delaware prosecutors coordinate with federal authorities on cases involving parents who flee across state lines to avoid support obligations.
Modifying Child Support Orders
Delaware permits child support modifications when circumstances change significantly. Under Family Court Rule 52(c), parents may file a Petition for Modification (Form 342) if two-and-a-half years have passed since the last order, or sooner if a substantial change in circumstances exists. A modification will only be granted if the recalculated amount differs from the current order by 10% or more.
Substantial changes justifying modification include: significant income increase or decrease for either parent (job loss, promotion, disability), remarriage affecting household expenses, birth of additional children, changes in custody or parenting time, changes in the child's medical or educational needs, or changes in health insurance availability or cost. DCSS clients pay no filing fee for modification petitions; non-DCSS clients should verify current fees with the Family Court clerk (approximately $25 as of March 2026).
Common Calculator Errors to Avoid
Many parents make calculation errors that produce inaccurate support estimates. The most common mistake is entering annual income instead of monthly income—the calculator requires monthly figures, so divide annual salary by 12 before entering. Another frequent error is omitting income sources: the calculator requires all income including bonuses, commissions, overtime, rental income, and investment earnings, not just base salary.
Parents also err by entering incorrect overnight counts. Use the overnight number from the current custody order, not estimates or desired amounts. If no custody order exists, the court will typically assign overnights based on the status quo parenting arrangement. Finally, parents sometimes forget to include childcare and health insurance costs, which significantly affect the final calculation. Gather all required documentation before using the calculator to ensure accuracy.
When to Seek Legal Assistance
While Delaware's child support calculator provides presumptive support amounts, certain situations warrant attorney consultation. Complex income situations (self-employment, business ownership, stock options, or deferred compensation), high-income cases (combined income exceeding $15,000 monthly), cases involving children with special needs, disputes about imputed income, and deviation requests all benefit from legal representation.
Delaware Family Court Resource Centers in each county provide free assistance with forms and procedures but cannot give legal advice. Delaware Volunteer Legal Services (302-575-0408) offers free legal help to qualifying low-income parents. The Delaware State Bar Association Lawyer Referral Service (302-658-5279) can connect parents with family law attorneys who offer consultations.
Frequently Asked Questions
How is child support calculated in Delaware?
Delaware calculates child support using the Melson Formula, which first subtracts a self-support allowance (110% of federal poverty level, approximately $1,200/month in 2026) from each parent's income. The formula then applies a primary support calculation of ($410 × number of children) + $370, allocates this between parents based on income shares, and adds a Standard of Living Adjustment of 12-21% of remaining income depending on the number of children.
What is the minimum child support payment in Delaware?
Delaware has no statutory minimum child support payment. However, courts impute a minimum income of $2,390 per month to voluntarily unemployed parents. At this income level, after self-support allowance and standard deductions, a parent with one child might owe approximately $250-400 monthly depending on custody arrangement. Courts may deviate below guidelines only with written findings that the standard amount would be unjust.
How long does child support last in Delaware?
Delaware child support terminates when the child turns 18, or at age 19 if the child remains enrolled in high school, whichever comes first. Under 13 Del. Code § 517, support ends automatically by operation of law without requiring a motion to terminate. Delaware does not require parents to pay support for college or post-secondary education unless voluntarily agreed.
Can I modify child support in Delaware?
Yes, Delaware allows child support modification after two-and-a-half years from the last order, or sooner with a substantial change in circumstances. The modification must result in at least a 10% change from the current order amount. File a Petition for Modification (Form 342) with the Family Court. DCSS clients pay no filing fee; private cases pay approximately $25 as of March 2026.
What happens if I don't pay child support in Delaware?
Delaware enforces child support through automatic wage garnishment (up to 50-65% of disposable income), tax refund interception, license suspension, passport denial, credit reporting, and property liens. Willful non-payment may result in contempt of court, with potential jail time if the court finds the parent had ability to pay but refused. Federal law makes non-payment for 4+ months a misdemeanor and 8+ months a felony.
Does overtime count as income for Delaware child support?
Yes, Delaware includes overtime pay in gross income for child support calculations. The formula considers regular overtime as part of income if it represents a consistent earning pattern over time. Irregular or sporadic overtime may be averaged over a reasonable period. Courts examine overtime history when determining whether to include it in calculations.
How does shared custody affect child support in Delaware?
Parents with 80-124 overnights per year receive a reduction in primary support and SOLA obligations. Parents with 125-163 overnights receive a larger reduction. The calculator automatically applies these adjustments based on entered overnight counts. With 164+ overnights (true shared custody), both parents may have support obligations based on income differentials.
What if the other parent hides income in Delaware?
Delaware courts have broad authority to investigate hidden income through subpoenas of financial records, depositions, and forensic accounting. Lifestyle inconsistent with reported income raises red flags—courts may impute income based on observed spending. DCSS has access to employment databases, tax records, and financial institution information to verify income claims.
Can grandparents be ordered to pay child support in Delaware?
Under 13 Del. Code § 501, the duty to support minor children rests with parents, not grandparents. Grandparents have no legal obligation to pay child support in Delaware. However, if grandparents have legal custody or guardianship, they may seek support from the child's biological parents.
How does the child support calculator handle multiple families?
Delaware's calculator adjusts for pre-existing child support obligations. A parent paying support for children from a previous relationship receives a credit that reduces their net available income for calculating support in subsequent cases. The adjustment recognizes that parents may have support obligations to multiple children from different relationships.