Alimony & Child Support Guideline Calculator
Estimate US child support and spousal maintenance (alimony) obligations, Income Shares model, overnight custody credits, and marriage duration formulas.
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Frequently Asked Questions
How is child support calculated under the Income Shares Model?
Used by over 40 US states, the Income Shares Model combines both parents' net incomes to determine total baseline monthly child expenditure, then allocates the support burden proportionally based on each parent's share of income and physical overnight custody percentages.
Are alimony payments tax-deductible for the payer?
For all divorces finalized after January 1, 2019 (Tax Cuts and Jobs Act), alimony payments are NO LONGER tax-deductible by the paying spouse, and the receiving spouse does NOT pay income tax on alimony received.
How long does spousal alimony maintenance typically last?
Judges generally award alimony duration based on marriage length: Under 5 years: short rehabilitative support; 5 to 10 years: roughly 20% to 30% of marriage length; 10 to 20 years: roughly 30% to 50%; Over 20 years: potentially permanent support until retirement or remarriage.
How do parenting custody overnights impact child support?
Shared parenting time (typically 25% or more overnights per year) introduces an overnight cross-credit reduction, decreasing the higher earner's cash transfer to account for food, utilities, and direct housing expenses provided during their custody periods.