Child Support Income Share
Calculator
Results
- Combined income
- 100,000
- Income share (%)
- 60
- Annual obligation
- 7,200
- Obligation after the parenting-time adjustment
- 5,760
- Monthly obligation
- 480
Legal and admin results
| Combined income | 100,000 |
| Income share (%) | 60 |
| Annual obligation | 7,200 |
| Obligation after the parenting-time adjustment | 5,760 |
| Monthly obligation | 480 |
formula-map diagram
- Combined income
- 100,000
- Income share (%)
- 60
- Annual obligation
- 7,200
- Obligation after the parenting-time adjustment
- 5,760
- Monthly obligation
- 480
Legal and admin relationship
Formula
Share = payer income ÷ combined income ; obligation = total × share × (1 − parenting time%)= 100000
Note
This is NOT legal advice and NOT a statement of any law. It is generic arithmetic: it applies the displayed formula to the figures you entered, and every rate, fraction, factor, cap and threshold shown is a value YOU supply, not a statutory or court-approved figure. No jurisdiction's rule is built in. Real entitlements, fees, interest, support amounts and deadlines depend entirely on the jurisdiction, the wording of the contract, the day-count and rounding conventions the court applies, and the facts of the case. Use these figures only as a rough arithmetic check and consult a qualified lawyer in the relevant jurisdiction before relying on any number.
More in Legal and admin
See all →Frequently asked questions
How does the income shares model calculate child support?+
It estimates the amount parents would have spent on the child if the household were intact, based on combined parental income, then splits that obligation proportionally between parents based on each one's share of the combined income. The parent with placement receives support to cover their share.
What counts as income for this calculation?+
Most guidelines use gross income from all sources — wages, self-employment income, bonuses, and sometimes benefits — before taxes, though specific exclusions vary by jurisdiction. Confirm your jurisdiction's definition, since some exclude certain benefits or apply imputed income rules for underemployed parents.
Does parenting time or custody split change the result?+
Yes, most income-shares guidelines adjust the obligation based on the number of overnights or percentage of time each parent has the child, since shared custody offsets some of the calculated support. This calculator uses the basic income-shares split; check whether your jurisdiction applies a separate shared-custody adjustment.
Are childcare and health insurance costs included in the basic calculation?+
Typically these are added as extras on top of the base obligation, split proportionally between the parents by income share rather than built into the base table. Confirm whether your jurisdiction's worksheet requires these as a separate add-on line.
Is this calculator's result a guaranteed legal amount?+
No — this is an estimate based on standard income-shares logic; actual court-ordered support depends on your specific jurisdiction's guideline tables, deviations, and judicial discretion. This is not legal advice, and an attorney or your local child support agency can confirm the figure that applies to you.