80/20 Custody Schedules

About 78 overnights a year, extended alternating weekends, plus holidays.

Also written as 80 20 custody schedule, 80/20 parenting plan.

Overnight split: 79/21
Cycle length: 14 days
Exchanges: 2 per cycle
Longest gap: 11 nights

See Extended every other weekend on a calendar

Change the start date, swap which parent begins, or tap a night to move it. The overnight counts update as you go.

Schedule pattern

Majority time

Every second weekend runs Friday through Sunday night, with the children returning Monday morning, about a 79/21 split.

January 2026

Parent A
Parent B

Tap any night to switch parents.

An 80/20 target in practice almost always means extended alternating weekends, Friday through Sunday night. On the calendar that produces about 78 overnights a year for the non-primary parent, a 79/21 split, and it is the closest standard pattern to a true 80/20.

The plain every-other-weekend pattern, without the Sunday night, is 86/14, noticeably less than 80/20, even though the two are often talked about as if they were the same thing.

Holidays matter disproportionately at this end of the scale. A standard alternating-holiday rotation plus two weeks of summer can add 20 or more nights, taking a nominal 80/20 arrangement closer to 75/25.

How Extended every other weekend works

Extended alternating weekends

Friday, Saturday and Sunday nights every second week, with a Monday-morning school drop-off. Three nights out of fourteen, 79/21.

Plain alternating weekends

Friday and Saturday nights only, returning Sunday evening. Two nights out of fourteen, 86/14. This is closer to an 85/15 schedule than an 80/20 one.

The holiday effect

At 20%, holidays are a large proportion of the total. Alternating the major holidays and adding a summer block can lift the annual figure by a quarter or more. The builder recalculates the real total once you set the holiday rotation.

Deciding between this and another pattern? Put them side by side in the custody schedule comparison tool, check your exact numbers with the parenting time calculator, and when the schedule is settled, turn it into a court-ready parenting plan.

Pros and cons

What works well

Workable across long distances
Few exchanges and a very simple routine
One unambiguous primary home
Predictable for school and medical arrangements

What to watch for

Limited day-to-day involvement for the second parent
Up to eleven nights between contacts
The 80/20 label often overstates the plain weekend pattern

When 80/20 is the right target

Long distances, demanding or irregular work, or circumstances where a more even split isn't currently workable. Many 80/20 plans are written with an explicit step-up: more time as the children get older, or once a parent relocates closer.

How it compares

The same figures for the schedules parents usually weigh against this one.

Schedule	Split	Cycle	Exchanges	Longest gap
Extended every other weekendThis page	79/21	14 days	2 / cycle	11 nights
Every other weekend	86/14	14 days	2 / cycle	12 nights
Every other weekend + midweek	71/29	14 days	6 / cycle	6 nights
Every weekend	71/29	7 days	2 / cycle	5 nights

Common questions

How many overnights is 80/20 custody?

About 73 nights is a literal 20 percent of the year. The closest standard pattern, extended alternating weekends, gives 78 before holidays; plain alternating weekends give only 52.

Is every other weekend an 80/20 schedule?

Not quite. Plain alternating weekends are 86/14. You need the Sunday night, the Friday-to-Monday version, to reach roughly 80/20.

Can an 80/20 schedule be changed later?

Parenting plans can generally be modified when circumstances change materially, a move, a change in work, or the children getting older. Some plans build the step-up in from the start, which avoids going back to court. State law and local court rules vary, so confirm the specifics with your court or an attorney before you file.

Document preparation only: not legal advice. Not affiliated with any court.