Michigan Parenting Time Calculator

Michigan calculates parenting time by counting annual overnight stays with each parent under MCL 722.27a of the Child Custody Act of 1970. The total 365 nights per year are divided between parents to determine each parent's percentage—for example, 73 overnights equals approximately 20% parenting time while 182 overnights equals approximately 50%. The Michigan Child Support Formula then uses these overnight counts on a sliding scale to adjust support obligations based on each parent's actual caregiving time.

Michigan does not use a single percentage threshold for shared custody. Instead, the Michigan Child Support Formula applies a sliding scale that adjusts support obligations proportionally as overnights increase. Moving from 73 overnights (20%) to 182 overnights (50%) significantly reduces support payments—for example, from $1,097 monthly to $199 monthly in one illustrative case. Equal parenting time at 50% does not eliminate child support; the higher-earning parent typically still pays some support.

A 2-2-3 custody schedule in Michigan divides parenting time equally over a two-week rotation. One parent has Monday and Tuesday overnight while the other has Wednesday and Thursday overnight, then parents alternate the three-day weekend from Friday through Sunday. This schedule achieves true 50/50 custody with 182.5 overnights per parent annually. Michigan courts often recommend this arrangement when parents live close together because frequent exchanges work best with minimal travel time.

Under the Michigan Child Support Formula, more overnight parenting time directly reduces child support obligations. The formula applies a parental time offset recognizing that the parent with the child covers food, utilities, and direct expenses during that time. For example, increasing from 73 overnights (80/20 split) to 109 overnights (70/30 split) reduced one parent's monthly support from $1,097 to $952—a savings of $1,740 annually. The 2025 formula uses refined calculations to avoid abrupt swings when schedules approach 50/50.

Yes, Michigan allows parenting time modifications under MCL 722.27a by filing Form FOC 65 (Motion Regarding Parenting Time) with the Friend of the Court. Courts require evidence that circumstances have changed—a difference of at least 21 overnights from the original order or other significant changes. For modifications affecting the established custodial environment, clear and convincing evidence must show the change serves the child's best interests. The non-filing parent may respond using Form FOC 66.

Michigan's Parenting Time Guideline recommends frequent but shorter parenting time for toddlers to accommodate their developing memory and attachment needs. Infants under nine months have memory spans of only several days to one week, so consistent routines and regular contact with both parents help maintain bonds. For children under age two, courts often favor several shorter visits per week rather than extended overnights. Standard parenting time schedules typically apply to children age two and older in many Michigan counties.

Michigan courts typically alternate major holidays annually between parents using an even/odd year system. In even-numbered years, one parent receives Thanksgiving, Christmas Day, Easter, and Fourth of July while the other receives Christmas Eve, Memorial Day, Labor Day, and Halloween—then they switch in odd-numbered years. Holiday schedules take precedence over regular parenting time. Mother's Day always goes to the mother and Father's Day to the father regardless of the regular schedule.

First right of refusal is a clause Michigan parents can add to custody agreements requiring each parent to offer childcare time to the other parent before hiring a babysitter or using third-party care. While not required by statute, courts commonly include this provision under MCL 722.27a's authority to add reasonable parenting time conditions. A typical clause applies when a parent will be away overnight or for a 12-hour work shift. This provision reduces childcare costs and maximizes each parent's time with the child.