# Child Support Calculator > Estimate monthly child support payments based on income, custody arrangement, and number of children **Category:** Utility **Keywords:** calculator, tool **URL:** https://complete.tools/child-support-calculator ## How it calculates The child support calculations can be based on different formulas: Income Shares, Flat Percentage, and Melson Formula. For the Income Shares model, the formula is: CS = (P1 + P2) × (Percentage Share). Here, CS represents child support, P1 is the income of the non-custodial parent, P2 is the income of the custodial parent, and Percentage Share is the portion of combined income designated for child support. For the Flat Percentage model, the formula is: CS = P1 × Flat Rate. In this case, P1 is the income of the non-custodial parent, and Flat Rate is the percentage dictated by local laws. The Melson Formula is more complex and includes calculations for both parents' basic living expenses and the needs of the child, often represented as: CS = (P1 - E1) × (Percentage Share) + (P2 - E2) × (Percentage Share). Here, E1 and E2 are the necessary expenses for each parent. This formula aims to provide a balanced support amount considering the financial demands on both parents. ## Who should use this This tool can be utilized by family law attorneys calculating potential child support obligations for clients during divorce proceedings. Child support mediators can use it to facilitate discussions between parties about financial responsibilities. Additionally, judges may reference it to ensure equitable support award decisions. Single parents seeking clarity on expected child support amounts can also benefit from the calculations provided. ## Worked examples Example 1: Using the Income Shares model, if Parent 1 earns $4,000 and Parent 2 earns $3,000, and the combined income percentage for child support is set at 20%, the calculation would be: CS = ($4,000 + $3,000) × 0.20 = $1,400. Therefore, the estimated child support payment is $1,400 per month. Example 2: For the Flat Percentage model, if the non-custodial parent earns $5,000 and the jurisdiction mandates a 25% support obligation, the calculation would be: CS = $5,000 × 0.25 = $1,250. Thus, the monthly child support payment is $1,250. Example 3: In the Melson Formula scenario, if Parent 1 has an income of $3,500, Parent 2 has $2,500, and their necessary expenses (E1 and E2) are $1,000 and $800 respectively, with a child support percentage of 30%, the calculation would be: CS = (($3,500 - $1,000) + ($2,500 - $800)) × 0.30 = ($2,500 + $1,700) × 0.30 = $1,050. Therefore, the estimated child support payment is $1,050. ## Limitations This tool has specific limitations, including precision limits, as it rounds financial figures to the nearest dollar, which may affect the total. It assumes that both parents report accurate income and expense data; discrepancies can lead to inaccurate estimates. The tool may not account for additional expenses such as healthcare or education, which can vary significantly by case. Furthermore, jurisdictional differences in child support laws and formulas are not comprehensively covered, potentially leading to variations in results based on local regulations. Finally, this tool does not take into account extraordinary circumstances that may affect child support obligations, such as changes in income or custody arrangements. ## FAQs **Q:** What factors influence the percentage share in the Income Shares model? **A:** The percentage share in the Income Shares model is influenced by the combined income of both parents, the number of children, and the specific guidelines set by the state or jurisdiction. **Q:** How does the Flat Percentage model differ across jurisdictions? **A:** The Flat Percentage model varies significantly across jurisdictions, as each state has its own predetermined percentage rates which can be influenced by the non-custodial parent's income level and number of dependents. **Q:** Can adjustments be made to child support payments over time? **A:** Yes, child support payments can be adjusted based on changes in financial circumstances, such as job loss, changes in income, or changes in the needs of the child, but these adjustments typically require legal proceedings. **Q:** What role do additional expenses play in the Melson Formula? **A:** In the Melson Formula, additional expenses such as childcare, education, and healthcare are considered to ensure that support payments are reflective of the total financial requirements for raising the child. --- *Generated from [complete.tools/child-support-calculator](https://complete.tools/child-support-calculator)*