Equal and Extensive Time-Sharing in Hawai‘i Child Support
Hawai‘i treats 143 or fewer overnights as sole physical custody, more than 143 and fewer than 183 as extensive time-sharing with a credit for each extra overnight, and about 183 each as equal time-sharing, where support is the difference between the parents’ yearly obligations divided by 12.
The three zones
Under the Guidelines, a parent with 143 or fewer overnights a year is treated as having sole physical custody for child support, and the standard worksheet applies. A parent with more than 143 and fewer than 183 overnights has extensive time-sharing, and support is figured on the Extensive Time-Sharing Worksheet. About 183 overnights each is equal time-sharing, and support is figured from the difference between the two parents’ yearly obligations (2024 Guidelines, Section V.H).
Equal time-sharing
Complete the standard worksheet for both parents and take each parent’s Line 17 amount. Each yearly obligation is the monthly amount times six months, the difference between the two is divided by 12, and the parent with the larger obligation pays that amount, rounded to the nearest dollar. In the example below, equal time-sharing support is $717 a month.
Extensive time-sharing
Take the standard support for the parent with fewer overnights (Line 23) and the equal time-sharing support (Line 24). If the same parent pays under both, subtract; if different parents pay, add. Divide the difference by 40 overnights, the gap between 143 and 183, to get an adjustment rate, multiply it by the number of overnights above 143, and subtract the result from the standard support.
| Line | Amount |
|---|---|
| Standard support for the parent with fewer overnights (Line 23) | $1,885 |
| Equal time-sharing support (Line 24) | $717 |
| Difference (Line 25 = 23 − 24) | $1,168 |
| Adjustment rate per overnight (Line 26 = 25 ÷ 40) | $29.20 |
| Overnights above 143: 160 − 143 (Line 27) | 17 |
| Credit (Line 28 = 26 x 27) | $496 |
| Extensive time-sharing support (Line 29 = 23 − 28) | $1,389 |
The credit grows with each additional overnight, so the order moves smoothly from the standard amount at 143 overnights to the equal time-sharing amount at 183.
When the other parent pays
Occasionally the parent with more overnights has the much higher income, and the formula can produce a result in which that parent owes support under equal time-sharing. In that case the Guidelines add the two amounts instead of subtracting, and the calculator handles the direction for you.
Counting overnights
Child support is based on the number of overnights each parent actually has, not on the label of the custody arrangement. Enter the overnights for the parent who has fewer; the calculator assigns the rest to the other parent.
Questions to bring to an attorney
Ask which number of overnights the court will use, whether your actual schedule matches the order, and how a few more overnights near 143 or 183 would change the result.
Try your own schedule
Move the overnight slider in the Hawai‘i child support calculator across 143 and 183 to see the three zones.
Frequently asked questions
How many overnights is extensive time-sharing in Hawai‘i?
More than 143 and fewer than 183 overnights a year for the parent with fewer overnights.
What is equal time-sharing in Hawai‘i?
About 183 overnights each. Support is the difference between the two parents' yearly obligations divided by 12.
What is sole physical custody for child support in Hawai‘i?
The other parent has 143 or fewer overnights per year.
Is the label joint custody what counts in Hawai‘i?
No. Under the Guidelines child support is based on the number of overnights, not the label.
How is the extensive time-sharing credit calculated?
The difference between standard and equal time-sharing support is divided by 40, then multiplied by the overnights above 143.
Official sources
- 2024 Hawai‘i Child Support Guidelines
- 2024 Child Support Guidelines Excel Worksheets
- Appendix B: Table of Incomes
- Hawai‘i State Judiciary: Child Support Guidelines
A local family law attorney can review your situation — many offer a free consultation.
This is general information, not legal advice. It is based on the cited Hawaii statutes, rules and court opinions, and every case turns on its own facts. Confirm how the law applies to your situation with a licensed Hawaii attorney.