How is parenting time calculated?

By counting overnights. Each night the child sleeps at a parent's home counts toward that parent's percentage. The total is divided by 365.

Is parenting time the same as custody percentage?

Often, yes, though some states use day-counts or specific hour-thresholds rather than overnights. The IRS and most state child support formulas use overnights as the standard unit.

What is a 50/50 parenting time percentage?

A schedule where each parent has roughly half the overnights, 183 or 182 nights per year. 2-2-3, 5-2-2-5, 3-4-4-3, and alternating weeks all qualify.

Does parenting time percentage affect child support?

Yes. Higher parenting time generally reduces the support the higher-time parent pays or increases what they receive, depending on state formula.

What if my parenting time percentage drifts from the plan?

Track it. Small drifts are normal. A sustained drift greater than 10 percent over a year may justify modifying the underlying order and child support.

Parenting time percentage, CoFam Learn

Q: What is parenting time percentage?

The share of overnights each parent has with the child across a calendar year, expressed as a percentage. It is used to calculate child support, determine joint custody status, and resolve tax dependency.

What is parenting time percentage?

Parenting time percentage is the proportion of overnights each parent has with the child across the year, expressed as a percentage. A 50/50 schedule yields 50 percent for each parent. A 5-2-2-5 schedule yields exactly 50 percent. A every-other-weekend schedule yields roughly 80/20. The percentage is calculated on a 365-day base, not a school-year base, and includes vacations, holidays, and summer weeks. State child support formulas use the percentage as a primary input. A few states use the day-count rather than the percentage, but the underlying math is identical.

How To Calculate Parenting Time Percentage

Count the overnights each parent has across a full calendar year. The annual base is 365 nights (366 in leap years). Divide each parent's overnight count by the total. A parent with 183 overnights has 50.1 percent. A parent with 110 overnights has 30.1 percent. The simplest counting unit is the night the child sleeps at that parent's home. Travel days where the child changes homes mid-day are usually counted by where the child sleeps that night. Summer camp, hospital stays, and overnight school trips typically count to the parent who would have had the child but for the event.

Why Parenting Time Percentage Matters

The percentage drives three downstream legal effects. First, child support, most state formulas use the percentage as a multiplier in the support calculation, with the higher-time parent receiving more or the lower-time parent paying less. Second, joint custody thresholds, most states require a parent to cross some percentage floor (30 to 40 percent in most jurisdictions) to qualify for joint physical custody. Third, tax dependency, the parent with more than 50 percent of overnights gets the default right to claim the child as a dependent on federal taxes.

Tracking Parenting Time Percentage Accurately

Most disputes over parenting time percentage come from sloppy tracking rather than bad-faith disagreement. Parents who do not log overnights as they happen often disagree about what actually occurred six months later. Three practices make tracking reliable. First, log each overnight in real time, not retrospectively. Second, log who had the child during ambiguous moments, summer camp, sleepovers at grandparents, school trips. Third, share the running count with the co-parent monthly so disputes surface before they accumulate. The audit log matters in court if the percentage is ever contested.

When Parenting Time Percentage Changes

Schedules drift. The parenting plan says 50/50, but one parent travels more for work and the actual time-share lands at 55/45. Or the children spend more time at one parent's house because the school is closer. These drifts matter, if they persist for years and exceed 10 percent variance from the plan, the lower-time parent may have grounds to modify the order. Most courts will not modify based on small variances or temporary patterns, but a sustained drift can trigger a recalculation of child support and a formal modification.

How CoFam Calculates Parenting Time Percentage

CoFam shows the percentage live as the schedule plays out. The number updates every night based on the actual overnights in the system. The view distinguishes between the parenting plan target (what the plan says the percentage should be) and the actual percentage (what has been logged). If actual drifts from target, the app surfaces it. The audit log is exportable to PDF for any year, showing each overnight, the parent who had the child, and the cumulative percentage.

See how CoFam tracks parenting time percentage live → the CoFam calendar