Advanced Child Support Calculator
Calculate child support obligations based on global standards and guidelines
Input Parameters
Calculation Results
International Comparison
Note: This child support wi calculator provides estimates based on standard guidelines. Actual court-ordered amounts may vary based on specific circumstances, local laws, and judicial discretion.
How Child Support is Calculated Worldwide
Parental Income
Most countries consider both parents’ incomes when calculating child support. Some jurisdictions use gross income, while others use net income after taxes and deductions. The United States typically uses the Income Shares Model which estimates the amount that would have been spent on the child if the parents lived together.
Number of Children
Support amounts generally increase with more children, though not proportionally. Many countries use percentage scales that decrease marginally per additional child. For example, Germany’s Düsseldorf Table applies a descending percentage scale for additional children.
Custody Arrangement
The time each parent spends with the child significantly impacts support calculations. Most systems reduce obligations for non-custodial parents who have substantial parenting time (often called “shared custody” or “joint physical custody” arrangements).
Additional Expenses
Extraordinary expenses like childcare, health insurance, education costs, and special needs are typically added to basic support amounts. Some countries prorate these expenses based on income shares, while others have specific allowances.
International Comparison Table
| Country | Calculation Model | Key Characteristics | Typical Range (% of income) |
|---|---|---|---|
| United States | Income Shares Model | Based on combined parental income and shared parenting time | 15-35% |
| Canada | Federal/Provincial Guidelines | Table amounts based on payer’s income and number of children | 10-30% |
| United Kingdom | Child Maintenance Service Formula | Percentage of gross income with reductions for shared care | 12-25% |
| Australia | Child Support Formula | Considers both parents’ incomes, care percentages, and costs | 17-32% |
| Germany | Düsseldorf Table | Fixed amounts based on income brackets and child’s age | 10-25% |
This child support wi calculator is for informational purposes only and does not constitute legal advice. Calculations are estimates based on generalized models and may not reflect actual court-ordered amounts. Always consult with a legal professional in your jurisdiction for accurate child support determinations.