A 70/30 custody schedule is a "physical custody" arrangement. Physical custody determines where a child actually lives day to day. In a 70/30 split, one parent has the child about 70% of the time, and the other has about 30%. Over a 365-day year, that works out to roughly 256 nights for one parent and 109 for the other.

It's an alternative to more evenly split schedules like 50/50 or 60/40. A 70/30 split usually shows up when a 50/50 or 60/40 schedule isn't realistic. One parent might travel often for work. Another might live too far from the child's school for daily exchanges. A third might have a job that rules out regular weekday parenting time.

A 70/30 physical custody split doesn't automatically change legal custody. Legal custody covers decisions about school, medical care, and religion. Most parents on a 70/30 schedule still share joint legal custody, even though one parent has much less day-to-day time with the child.

The most common version is the 5-2 schedule. One parent has the child for the five weekdays. The other has the child for the weekend, with Friday and Sunday as the usual exchange days. This works well when the 70% parent handles the school-week routine and the 30% parent's schedule only allows for weekends.

Which version fits best often depends on the child's age. Our guide to custody schedules by age walks through examples at each stage, from infants to teens.

The Texas Attorney General's parenting time guidance walks through several of these variations. Terminology and default assumptions vary once you leave Texas, though.

No state statute hands out a 70/30 split by formula. Courts apply a "best interest of the child" standard instead, then weigh a list of factors that differs by state. Florida directs judges to evaluate 20 separate factors under Fla. Stat. § 61.13(3). These include each parent's caregiving history and the child's ties to school and community. Illinois applies a similar 17-factor test under 750 ILCS 5/602.7. One factor there: how much caretaking each parent handled in the two years before the case.

Overnight counts feed directly into most states' child support guidelines. The parent with less parenting time typically pays more support. A 70/30 split often means a bigger adjustment than a 60/40 split would. The exact math depends on both parents' incomes and your state's guideline worksheet—a family law attorney can walk through it for your situation.

A 70/30 custody split doesn't affect how marital property gets divided. That's governed separately from parenting time.

The same principle applies. Custody percentage and property division are evaluated under different legal standards. Every one of Marble's 10 active states applies its own factor list for custody decisions, plus its own child support guideline formula. How much weight any factor gets, and how overnights translate into a support number, varies by state. That's why a local attorney's read matters more than a general rule.

A child custody law attorney can help in three ways. First, they can look at whether a 70/30 split actually fits your circumstances. Second, they can draft a parenting plan that holds up in your state. Third, they can estimate how the arrangement is likely to affect child support before you agree to it.

If a 70/30 split was ordered rather than agreed to, an attorney can also help. They can review whether the facts support asking for a modification later.

A 70/30 schedule isn't a verdict on either parent. It's usually a practical response to distance, work, or a child's routine. What matters most is consistency—and that both parents stay meaningfully involved, even if the time isn't split evenly.

If you're negotiating a 70/30 arrangement, or think your current schedule no longer fits, a family law attorney can help. They can help you build a plan that actually works, whether that's a 70/30 split or something else.

Disclaimer: This article is for general informational purposes only and is not legal advice. Laws vary by state and change over time, and your situation may differ from the examples described here. For advice about your specific circumstances, consult a licensed attorney in your state.