Compare simplified income-shares and percentage-of-income child support worksheets using monthly income and child count inputs.
Child support is usually set under state guidelines that look at both parents’ finances and the needs of the child. The exact worksheet rules vary by jurisdiction, so this calculator uses simplified comparison models instead of pretending to reproduce every state formula.
The page lets you compare a basic income-shares-style estimate with a percentage-of-income estimate. That makes it useful for planning and negotiation, but it is not a court order and it does not resolve guideline credits, deviations, or local rule differences.
Understanding potential child-support ranges helps both parents plan budgets and compare settlement scenarios. A worksheet is more useful when the assumptions are visible instead of buried inside a jurisdiction-specific guideline table.
Income Shares Model: Combined Income = Parent A + Parent B; Support Obligation = Combined × Child Cost % (based on # children); Non-Custodial Share = Obligation × (Non-Custodial Income / Combined Income) Percentage-of-Income Model: Support = Non-Custodial Income × Rate (1 child: 17%, 2: 25%, 3: 29%, 4: 31%, 5+: 35%) This worksheet does not apply credits or deviations unless they are added manually through the inputs or a state-specific version of the calculator.
Result: $1,250/month
Combined monthly income is $8,000. For two children the cost percentage is 25%, yielding $2,000 in total obligation. The non-custodial parent earns 62.5% of combined income, so their share is $2,000 × 0.625 = $1,250 per month.
Family courts follow statutory guidelines that establish presumptive support amounts. Judges may deviate from the guidelines for specific circumstances such as extraordinary medical needs, private school tuition, or travel expenses for visitation.
The income shares model is considered more equitable because it accounts for both parents’ financial capacity. The percentage-of-income model is simpler to administer but can produce inequitable results when parents have disparate incomes.
Child support orders are enforceable through wage garnishment, tax refund interception, license suspension, and contempt proceedings. The Federal Office of Child Support Enforcement coordinates interstate collection efforts.
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This worksheet compares two simplified child-support models: an income-shares-style estimate and a percentage-of-income estimate. It uses the entered monthly incomes and the number of children to apply a rough cost factor, then shows a monthly and annual support estimate so users can compare scenarios.
The page is intentionally conservative. It does not calculate guideline adjustments, deviations, imputed income, health-insurance credits, childcare credits, or court-specific parenting-time offsets unless they are explicitly represented in the worksheet inputs. It is a planning aid, not a live guideline determination.
The income shares model combines both parents’ gross incomes and determines the total child-rearing cost based on published tables. Each parent’s share is proportional to their contribution to combined income. Most U.S. states use this approach.
The percentage-of-income model applies a fixed percentage to the non-custodial parent’s gross income. The percentage increases with more children. It is simpler but does not account for the custodial parent’s income.
Yes. Many states reduce child support when the non-custodial parent has substantial parenting time. This worksheet keeps custody time as a separate planning factor rather than baking in one jurisdiction’s rule.
Yes. Either parent can request modification if there is a substantial change in circumstances such as job loss, significant income change, or changes in custody. Courts require proof of the material change.
No. Under current federal tax law, child support payments are neither deductible by the payer nor taxable income for the recipient. That is one reason the worksheet keeps support and alimony separate.
Gross income generally includes wages, salary, bonuses, commissions, self-employment income, rental income, dividends, interest, pensions, and Social Security benefits. Some states also impute income if a parent is voluntarily underemployed.