Parenting schedules get described in shorthand, every other weekend, week on week off, 5-2-2-5, but the parenting plan and the child support worksheet both come down to one unit: overnights per year with each parent. That figure describes the residential schedule, it is what the court reads when someone asks for a residential schedule deviation, and it is what changes when summer blocks and holidays are allocated.
Parenting Time and Overnights in Washington
How overnights are counted, and what they actually mean for child support
Schedule a ConsultationWhy Overnights Are the Number That Matters
RCW 26.09.187 and RCW 26.19.075
There is no automatic credit in Washington
Unlike some states, Washington has no statutory table that converts overnights into a child support credit. The 2026 amendments did not add one. Instead, RCW 26.19.075(1)(d) lets the court deviate from the standard calculation when a child spends a significant amount of time with the paying parent, after weighing that parent’s increased expenses and the receiving parent’s decreased ones. The deviation is not available if it would leave the receiving household without enough to meet the child’s basic needs or if the child receives TANF. In practice, many Washington attorneys treat roughly ninety overnights, about a quarter of the year, as the point where a request becomes realistic.
Why we don't give you a number here
We built calculators for child support, maintenance and property. We deliberately did not build one for parenting time.
Washington has no statutory table that converts overnights into a child support credit. A residential schedule deviation under RCW 26.19.075(1)(d) is discretionary. The court weighs the paying parent’s increased costs against the receiving parent’s decreased ones, has to put its reasons in writing, and cannot grant it if it would leave the receiving household short of the children’s basic needs.
A calculator would hand you a percentage. It could not tell you whether a court would give you the credit, and a number on a screen has a way of becoming an expectation. Parenting schedules also aren’t built backwards from a support figure. Residential time is decided on the best interests of the children under RCW 26.09.187 and 26.09.191.
What we can do is walk through your actual schedule, count the overnights the way a court and the Division of Child Support count them, and tell you honestly where a deviation request stands.
Why Your Real Number May Differ
Where estimates meet reality
A residential schedule deviation is discretionary. The court must make written findings, and the parent asking for it needs evidence of the extra expenses that come with the time.
The deviation cannot leave the receiving household without enough to meet the children's basic needs, and it is unavailable when the child receives TANF.
Equal time does not mean no support. The parent with the larger obligation, usually the higher earner, normally still pays, and the deviation reduces rather than erases the transfer payment.
Holidays, school breaks and summer blocks often move the real total well away from the base rotation, which is why they are separate inputs here.
Where each parent has primary care of different children, support is calculated for each household and offset, a different exercise from a residential credit.
Residential time is decided on the best interests of the child under RCW 26.09.187 and 26.09.191, not by working backwards from a support figure.
Frequently Asked Questions
Parenting time calculator
How are overnights counted in Washington?
An overnight is a night the child spends in that parent’s care. The total across the year, out of 365, describes each parent’s residential time. A parenting plan states the regular schedule, then allocates holidays, school breaks and summer, and the final count is what a court or the Division of Child Support looks at when someone asks for a residential schedule deviation.
What is a standard parenting time schedule in Washington?
There is no legally standard schedule. Common arrangements range from every other weekend, about 52 overnights a year, through every other weekend with a midweek overnight, about 104, up to equal-time rotations such as week on week off, 5-2-2-5 or 2-2-3 at roughly 182 overnights each. What matters is the best interests of the children.
Does 50/50 parenting time mean no child support?
No. Equal time gives the court a reason to consider a residential schedule deviation, but support is still driven by the difference in incomes. A parent earning substantially more will usually still pay something with an equal schedule.
Is there a 90-overnight rule in Washington?
Not in the statute. Ninety overnights, about 25 percent of the year, is a practice benchmark many attorneys use for when a residential credit request is realistic. The law itself says only that the child must spend a significant amount of time with the paying parent, and the court decides case by case.
Can a parenting plan be changed?
Yes, though the standard depends on what you are changing. Minor adjustments to the schedule can be made on a lower showing, while changing the parent the child primarily lives with requires a substantial change of circumstances and a finding of adequate cause under RCW 26.09.260.
Ready to talk through your numbers?
An estimate is a starting point. A conversation with a Washington family law attorney is where it becomes a plan. We treat your consultation as confidential.
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