Child Support Estimator
Disclaimer: This is an estimate only. Actual amounts vary by state and court discretion.
Estimated Child Support by Number of Children
Approximate percentage of noncustodial parent's gross income (sole custody)
| Children | % of Income | Example ($5,000/mo income) | Notes |
|---|---|---|---|
| 1 child | 17–20% | $850–$1,000/mo | Most common guideline range |
| 2 children | 25% | $1,250/mo | Not simply double of 1 child |
| 3 children | 29% | $1,450/mo | Incremental increase per child |
| 4 children | 31% | $1,550/mo | Diminishing per-child increase |
| 5 children | 35% | $1,750/mo | Cap varies by state |
| 6+ children | 35–40% | $1,750–$2,000/mo | Many states cap at 50% |
How We Calculate This
This child support estimator uses established formulas and industry-standard data to provide accurate estimates.
- Enter your specific values into the calculator fields above
- Our algorithm applies the relevant formulas using your inputs
- Results are calculated instantly in your browser — nothing is sent to a server
- Review the detailed breakdown to understand how each factor affects your result
These calculations are estimates based on standard formulas. For critical decisions, always consult a qualified professional.
How to Convert Oven Recipes to Air Fryer
Child support is typically calculated using a percentage-of-income model. The noncustodial parent pays a share of their income based on the number of children and custody arrangement.
The basic rule:
- 1 child: approximately 17–20% of noncustodial gross income
- 2 children: approximately 25% of income
- 3 children: approximately 29% of income; 4+: approximately 31%
- Joint custody (50/50) typically reduces the obligation, and the higher earner pays the difference
Every state has its own guidelines. Some use a flat percentage model, others use an income-shares model that considers both parents' incomes. This calculator provides a simplified estimate — always consult your state's official guidelines or a family law attorney.
When Would You Use This Calculator?
This child support estimator is designed for anyone who needs quick, reliable estimates without complex spreadsheets or professional consultations.
- When you need a quick estimate before committing to a purchase or project
- When comparing different options or scenarios side by side
- When planning a budget and need to understand potential costs
- When you want to verify a quote or estimate you've received from a professional
- When teaching or learning about the concepts behind these calculations
Frequently Asked Questions
How does Wyoming handle this differently?
Wyoming has its own specific rules, rates, and limits that may differ significantly from federal guidelines or other states. This calculator uses Wyoming-specific data where available. Always verify with a local professional for important decisions.
How is child support calculated?
Most states use either a percentage-of-income model or an income-shares model. The percentage model takes a set percentage of the noncustodial parent's income. The income-shares model considers both parents' incomes and allocates costs proportionally. This calculator uses a simplified version that accounts for both incomes.
Does joint custody reduce child support?
Yes, in most states. When parents share custody 50/50, the support amount is typically reduced because both parents are directly covering the child's expenses during their parenting time. The higher-earning parent usually still pays some support to equalize the child's standard of living.
What income counts toward child support?
Gross income typically includes wages, salary, commissions, bonuses, overtime, self-employment income, rental income, dividends, pensions, and Social Security benefits. Some states allow deductions for taxes, mandatory retirement contributions, and health insurance premiums.
Can child support be modified?
Yes. Either parent can request a modification if there's a significant change in circumstances, such as job loss, substantial income change, change in custody, or a child's special needs. Most states require a change of 10-20% or more to grant a modification.
How long does child support last?
Child support typically continues until the child turns 18, though many states extend it to 19 or 21, especially if the child is still in high school or college. Some states also require support for children with disabilities indefinitely.
Is this calculator accurate for my state?
This provides a general estimate based on common formulas. Actual child support varies significantly by state, and courts consider many additional factors including childcare costs, healthcare, special needs, and the standard of living during the marriage. Always verify with your state's child support agency.