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Step 1 of 7: Income

Step 4: Time-Sharing & Social Security

Set the overnight time-sharing schedule and any Social Security benefits paid to the child. When both parents have substantial time-sharing (≥20% overnights), the obligation is adjusted using a special formula.

Parent A Overnights
182 (49.9%)
≥20% — Substantial
Parent B Overnights
183 (50.1%)
≥20% — Substantial
Adjustment Status
Active
§154.129 Possession Adjustment:
Overnight Time-Sharing §154.129 Possession Adjustment:

Under §154.129 Possession Adjustment:, if both parents have substantial time-sharing(≥20% overnights, or 73+ nights per year), the child support obligation is adjusted using a special formula. Each parent's share is reduced based on the other parent's overnight percentage, and each parent pays their share of child care and health insurance directly.

Enter the number of overnights the child(ren) spend with Parent A per year. Parent B's overnights are automatically calculated (365 minus Parent A). Under {lc.timeSharing.formulaLabel.replace(" Formula:", "")}, if BOTH parents have at least 73 overnights (20%), a time-sharing adjustment applies.

0 nights73 (20%)182 (50%)292 (80%)365 nights
nights per year
Parent A✓ Substantial
182
49.9% of year
Parent B✓ Substantial
183
50.1% of year
Annual Overnight Split
182 nights
183 nights
Parent AParent B
Calculation Method How It Works
✓

Substantial Time-Sharing Applies

When both parents have substantial time-sharing (≥20% overnights each), the support obligation is recalculated: the base amount is multiplied by 1.5, then each parent's obligation is reduced by the other parent's overnight percentage. Each parent also pays their share of child care and health insurance directly.

§154.129 Possession Adjustment: Formula:
1. Base obligation × 1.5 = adjusted base
2. Parent A pays: adjusted base × 50.1%(other parent's nights)
3. Parent B pays: adjusted base × 49.9%(other parent's nights)
4. Difference = net transfer between parents
5. Adjust ± for each parent's child care + health insurance share
Social Security Credit §154.132

If a Social Security benefit is paid to the child (or to the caregiver on the child's behalf) due to a parent's retirement, disability, or death, that benefit is credited against the parent's child support obligation. If the benefit equals or exceeds the parent's share, the obligation is fully satisfied. If it's less, the parent owes the difference. Any excess goes to the child with no credit on arrears.

Monthly Social Security benefit paid to the child (or caregiver on behalf of the child) due to a parent's retirement, disability, or death. Per {lc.ssCredit.creditLabel}, this is credited against that parent's support obligation.

Select which parent's Social Security record generates the benefit for the child. The credit is applied to that parent's obligation.