Alberta Canadian Parenting Time Calculator

The 40% threshold under Section 9 of the Federal Child Support Guidelines determines which child support calculation applies. If each parent has the child at least 40% of the time—146 days or 3,504 hours annually—the set-off formula replaces standard table amounts. Below 40%, the non-primary parent pays the full table amount based on their income alone.

Alberta courts use days, overnights, or hours to calculate parenting time percentage, with no single mandated method. Per L.C. v. R.O.C. [2007] A.J. No. 513, calculations must reflect actual evidence—courts cannot "deem" time. Time is measured annually (not monthly), averaging school-year and summer schedules over 12 months to determine the percentage.

An alternating weeks schedule provides each parent exactly 50% parenting time—182.5 days annually. The child spends one full week with one parent, then switches to the other parent the following week. This schedule clearly exceeds the 40% threshold, triggering the set-off child support formula under Section 9 of the Federal Child Support Guidelines.

School hours count toward the parent who has care and control during school attendance. Alberta courts typically credit school time to the parent who drops off and picks up the child that day. If Parent A drops the child at school and Parent B picks them up, courts may split those hours or credit the parent responsible for after-school care.

When parenting time falls near the 40% threshold, precise hour-by-hour calculation becomes critical. A parent at 38% using overnight counts might exceed 40% using hour-based calculation. Alberta courts examine the actual evidence of care and control time, and the counting methodology can determine whether Section 9's set-off formula or standard table amounts apply.

The set-off formula under Section 9 calculates each parent's notional table amount based on their income, then the higher earner pays the difference to the lower earner. Per Contino v. Leonelli-Contino (2005 SCC 63), the set-off is a starting point—courts also consider increased costs of shared parenting and each household's ability to meet the child's needs.

Parenting time schedules can be modified when there is a material change in circumstances affecting the child's best interests under Alberta's Family Law Act (SA 2003, c F-4.5). Applications are filed through Alberta Courts, with filing fees waivable for low-income parents at alberta.ca/waive-filing-fee. Family mediation through alberta.ca/family-mediation is encouraged before litigation.

The 5-2-2-5 schedule (also called 2-2-5-5) rotates the child between parents: two days with Parent A, two days with Parent B, then five days with each parent to complete the cycle. This creates approximately 50% parenting time for each parent, well above the 40% threshold. It works best when parents live near each other due to frequent transitions.