Illinois Parenting Plan Calculator

Illinois replaced 'custody' with **allocation of parental responsibilities** and **parenting time** in 2016 (750 ILCS 5/602.7). There's **no presumption** favoring any particular allocation — courts apply the **best interests** standard using 17 enumerated factors, including each parent's willingness to facilitate the child's relationship with the other parent.

No statutory default schedule. Illinois courts have wide discretion. Common arrangements include **alternating weekends plus midweek overnights** or **equal-time schedules** (2-2-3 or week-on/week-off). The court weighs the child's needs, each parent's work schedule, distance between homes, and the child's wishes (especially at **age 14+**, where preferences carry significant weight).

Illinois requires **60 days' written notice** before a relocation (750 ILCS 5/609.2). The distance trigger depends on the child's current county: **25 miles** in Cook, DuPage, Kane, Lake, McHenry, or Will counties; **50 miles** in all other counties. If the non-relocating parent objects, the court applies 11 statutory factors and the **relocating parent bears the burden**.

Modification of parenting time requires a **substantial change in circumstances** (750 ILCS 5/610.5). Within the first **2 years** of an order, the standard is stricter — modification requires showing the child's present environment seriously endangers the child's mental, moral, or physical health.

The calculator works best when you enter a full 12-month schedule, not just a weekly pattern. Include school breaks, summer weeks, holidays, exchange times, transportation duties, video calls, and make-up parenting time. Those details change overnight totals and the practical custody schedule.

A California parenting plan calculator should also separate legal custody, physical custody, joint custody, sole custody, child support, parenting time, visitation schedule, school decisions, medical decisions, extracurricular activities, travel consent, and dispute resolution. Those terms matter because the court needs a written parenting plan, not just an overnight count.

For California searches, the same worksheet also works as a California child support calculator preview: enter gross income, net disposable income, health insurance, daycare, union dues, mandatory retirement, tax filing status, other support orders, and parenting time percentage. California child support uses guideline math, so custody, timeshare, child support payments, and child and spousal support assumptions should be tested together before a family law hearing.

A California parenting plan calculator is often used next to a California child support guideline calculator because the parenting time percentage can change the monthly child support amount. Calculate custody time first, then compare how the support amount changes when the child is with each parent for 20%, 30%, 40%, or 50% of annual overnights.

The practical checklist is simple: calculate annual overnights, identify legal custody and physical custody, confirm each parent's income, include child care and health insurance, then test whether the proposed parenting plan is in the child's best interests. If the schedule changes, the child support order may need to be recalculated even when both parents already have a court order.

California child support guideline calculator inputs include each parent's income, parenting time, custody time, tax filing status, health insurance, child care, union dues, retirement deductions, spousal support, other child support orders, and the number of children. The support amount per month can change when a custody order shifts from sole custody to joint custody or when the parenting time percentage changes.

The California child support calculator guideline uses income, parenting time, tax filing status, health insurance, child-care costs, and add-ons to determine the amount. The calculation should be run before mediation because child support guidelines can make a schedule that looks equal on paper produce a different support amount per month.

California courts and local child support services usually need more than a schedule label. Calculate the child support amount, child support payment, monthly child support, parenting time calculator result, and guideline support before settlement, mediation, or a family law hearing. A family law attorney can then compare the child support guideline result with the proposed parenting plan.

A useful custody schedule explains weekdays, weekends, holidays, school breaks, summer vacation, birthdays, exchanges, transportation, right of first refusal, phone calls, video calls, and how parents handle late pickups or missed time. A 2-2-3 schedule, 2-2-5-5 schedule, every-other-weekend schedule, and week-on/week-off schedule can produce very different annual overnights.

Before filing, compare the proposed plan with the child's school calendar, parent work schedules, daycare, medical needs, distance between homes, domestic violence concerns, and the best interest factors the family court applies.

Use the calculator to calculate parenting time, overnights, guideline child support, spousal support, gross income, net disposable income, add-on expenses, child-care costs, health insurance, and the support amount before filing. California courts expect the parenting plan and child support calculation to tell the same story.

Contact the family law facilitator, local child support agency, or a family law attorney if the parents disagree about income, per month expenses, timeshare, imputed earnings, guideline deductions, or whether the proposed schedule is in the child's best interests.

• Current custody order, temporary order, or proposed parenting plan.
• School calendar, daycare schedule, work schedule, and travel limits.
• Holiday rotation, summer schedule, birthday schedule, and vacation rules.
• Exchange location, transportation split, communication rules, and decision-making terms.
• Child-support worksheet or overnight threshold used by the court.

Revisions are most common when a child starts school, a parent relocates, work schedules change, conflict at exchanges increases, support math no longer matches overnights, or the existing order does not explain holidays clearly. A calculator estimate should become a written plan before either parent relies on it.

Illinois cost and deadline signals is the right starting point because statewide law sets the baseline, while the facts of your parenting plan determine the actual risk band. Use the calculator before you compare attorney quotes, court options, or settlement choices.

Factors that affect the Illinois estimate usually comes down to three inputs: the amount at stake, the deadline or statutory rule, and whether the matter can be resolved before a contested filing. The calculator keeps those inputs separate so the result is easier to challenge.

County variation matters in Illinois because clerk practices, hearing calendars, and local filing steps can change the time cost even when the statewide rule is fixed.

• Cook County: 5,267,072 residents, county seat in Chicago.
• DuPage County: 931,508 residents, county seat in Wheaton.
• Lake County: 713,426 residents, county seat in Waukegan.
• Will County: 696,909 residents, county seat in Joliet.
• Kane County: 516,403 residents, county seat in Geneva.

1. Run the calculator with your current numbers and save the 2026 result.
2. Compare the result with documents, notices, invoices, or deadlines already in hand.
3. Use the estimate to prepare a focused consultation or filing plan before the next deadline.