Child Support with 50/50 Custody: How Parenting Time Affects Payments
Equal parenting time doesn’t mean zero support in most states. How the offset method works, state thresholds, and what to expect at 50/50.
“We split custody 50/50, so nobody pays support” is one of the most common myths in family law. In reality, when incomes are similar, a court may order little or nothing — but when one parent earns substantially more, the higher earner usually still pays, even at equal parenting time.
The offset method
Most states handle 50/50 with an offset: each parent’s hypothetical support obligation is calculated as if the other parent had sole custody, then the smaller obligation is subtracted from the larger one. The higher earner pays the difference. Example: Parent A has $6,000/month in net resources and Parent B has $3,500. In Texas, A’s hypothetical one-child obligation is 20% × $6,000 = $1,200; B’s is 20% × $3,500 = $700. The offset is $500/month.
State thresholds for shared custody
- Income Shares states typically start a parenting-time credit around 35–40% of overnights (roughly 128+ nights/year)
- Nevada: joint physical custody above 40% overnights reduces the base obligation by 18%
- Some states apply a shared-custody multiplier to reflect two households’ duplicated costs (e.g., Wisconsin uses 1.5×)
- A few states presume no support at 50/50 when incomes are roughly equal — but that presumption is rebuttable
When 50/50 still means a payment
Because most states base the number on income disparity, the parent with the higher income typically pays the difference even with equal parenting time. The larger the gap, the larger the payment — which is why the reverse calculator is useful: enter the number you are being asked to pay and see what income it implies.