Wyoming uses the Wyoming Child Support Guidelines (WY Stat § 20-2-304) to determine child support obligations. Under the Income Shares model, both parents' incomes are combined to estimate what the family would have spent on the child if the household were intact. The obligation is then divided proportionally based on each parent's contribution to combined net income.

Wyoming has several distinctive features in its child support system. Wyoming uses net income with presumptive guidelines that create a rebuttable presumption. The state includes specific provisions for mineral rights and royalty income, common in Wyoming. Wyoming courts can deviate for "any other relevant factor" — giving judges broad discretion.

Wyoming bases calculations on net income — meaning income after mandatory deductions like taxes, Social Security, and Medicare. This gives a more accurate picture of each parent's take-home pay. The self-support reserve in Wyoming is $1,300/month, ensuring the paying parent retains enough income to cover basic living expenses.

Wyoming recognizes "Shared Custody" when the non-custodial parent has the children for at least 128 overnights per year (approximately 35% of the time). When this threshold is met, the standard child support formula is adjusted to reflect the increased direct expenses borne by both parents.

Under Wyoming's Income Shares approach, the shared parenting adjustment typically calculates each parent's obligation based on their income share, then applies a credit or cross-calculation that accounts for the time each parent directly supports the child. The more overnights the non-custodial parent has, the greater the reduction in their payment — but the adjustment is not dollar-for-dollar because fixed costs like housing don't decrease when the child is away.

Below 128 overnights, Wyoming generally treats the arrangement as a sole custody situation with standard visitation, and no custody time adjustment is applied to the child support calculation.