Learn how shared parenting child support works in Alberta, including the 40% parenting rule, set-off calculations, income differences and special expenses.
Child Support in an Alberta Shared Parenting Arrangement
Shared parenting does not eliminate child support. Alberta law states that “every parent has an obligation to provide support for his or her child,” and courts must generally make support orders according to the applicable guidelines. Family Law Act, RSA 2000, c F-4, ss 49(1), 51(1).
For parents navigating separation or divorce, understanding how shared parenting child support in Alberta works can be an important part of establishing a parenting arrangement. While shared parenting means that children spend substantial time in both households, the financial responsibilities of each parent may not be equal.
A common misconception is that sharing parenting time equally automatically eliminates child support obligations. However, parenting time is only one part of the calculation. The incomes of both parents, the costs associated with maintaining two households, and the child’s financial needs are also important considerations.
Alberta’s child support guidelines provide a framework for determining support in shared parenting arrangements. Understanding how these guidelines apply can help parents better prepare for conversations about financial responsibilities and the ongoing costs of raising children after separation.
When does the shared-parenting rule apply?
The special shared-parenting rules apply when each parent has at least 40% of the parenting time over a year. The Alberta guidelines require the court to consider each parent’s table amount, the increased costs of shared parenting, and “the condition, means, needs and other circumstances” of the parents and child. Alberta Child Support Guidelines, s 9. The federal guidelines contain materially similar wording. Federal Child Support Guidelines, s 9.
Understanding the 40% Parenting Time Rule in Alberta
One of the most important considerations when determining child support in a shared parenting arrangement is whether both parents meet the 40% parenting time threshold.
This threshold recognizes arrangements in which children spend a significant amount of time with each parent rather than primarily residing in one household.
For example, a parenting schedule may involve children alternating weeks between households, or following another arrangement that allows both parents to have substantial parenting time throughout the year.
However, shared parenting does not necessarily mean that parenting time must be divided exactly 50/50.
The distinction matters because the child support calculation for a shared parenting arrangement involves additional considerations beyond those used in a situation where a child primarily resides with one parent.
Does Having Joint Custody Mean You Have Shared Parenting?
Parents sometimes use the terms joint custody and shared parenting interchangeably, but they do not necessarily describe the same circumstances.
An arrangement involving shared decision-making responsibilities does not automatically establish that both parents meet the parenting time threshold required for shared parenting child support calculations.
When assessing child support obligations, it is important to distinguish between how parenting decisions are made and how much time the child spends in each household.
Understanding this distinction can help parents avoid making assumptions about their financial obligations based solely on the terminology used in a parenting agreement.
How is the amount calculated?
The usual starting point is to calculate the table amount each parent would pay based on income and the number of children, then subtract the lower amount from the higher amount. This is often called a “set-off.” However, set-off is not automatically the final answer. The Supreme Court of Canada explains that it “serves as the starting point, but it cannot be the end of the inquiry.” Contino v. Leonelli-Contino, 2005 SCC 63 at para 49.
The court must consider duplicated expenses, such as maintaining suitable housing, food, clothing, transportation and activities in two homes. It may also consider differences in household income, budgets, standards of living and the child’s needs. Alberta’s Court of Appeal describes the analysis as “contextual and highly fact-dependent.” MacDonald v Brodoff, 2020 ABCA 246 at para 15.
Understanding Set-Off Child Support in Alberta
The set-off method is an important starting point when calculating child support under a shared parenting arrangement.
Rather than considering only one parent’s income, the initial calculation looks at the applicable child support table amount for each parent.
For example, consider a hypothetical situation where one parent’s monthly table amount is $1,000 and the other parent’s monthly table amount is $600.
The initial set-off calculation would be:
- Parent A’s table amount: $1,000 per month
- Parent B’s table amount: $600 per month
- Initial set-off amount: $400 per month
In this example, the difference between the two table amounts is $400.
However, this example illustrates only the mathematical starting point. It does not establish what the final child support payment would be.
The court must still consider the broader financial circumstances of the family, including the additional costs of shared parenting and each parent’s ability to meet the child’s needs.
This is why using a basic child support calculator may not provide a complete picture of the amount payable in an Alberta shared parenting arrangement.
Why Income Differences Matter in Shared Parenting
When parents have different incomes, those differences can influence how child support is assessed, even when parenting time is shared equally.
Consider a situation where one parent earns significantly more than the other. Both parents may provide suitable homes, purchase groceries, arrange transportation, and cover everyday expenses during their respective parenting time.
However, the financial impact of those expenses may differ substantially between households.
A higher-income parent may have greater resources available after meeting household expenses, while a lower-income parent may face greater financial limitations.
This is one reason shared parenting child support calculations in Alberta involve more than simply dividing expenses according to the percentage of time a child spends with each parent.
The court’s consideration of the parents’ financial circumstances helps ensure that the calculation reflects the actual needs and resources of the family.
Why Maintaining Two Homes Can Increase Parenting Costs
Shared parenting arrangements can create additional household expenses because both parents must provide an appropriate environment for their children.
Depending on the family’s circumstances, both households may need to account for:
- Suitable living and sleeping arrangements
- Clothing and everyday necessities
- Groceries and household supplies
- Transportation to school and activities
- School-related materials and equipment
- Recreational activities and other routine expenses
Many of these expenses do not disappear when a child moves between homes.
For example, the cost of maintaining appropriate housing may remain relatively consistent for each parent regardless of whether the child is staying there on a particular day.
Other expenses, such as groceries or transportation, may vary depending on parenting schedules.
Understanding the difference between fixed and variable expenses can help explain why the set-off amount does not automatically determine the final child support obligation.
What about special expenses?
Child care, uninsured medical costs, education and extraordinary extracurricular expenses may be added to support. These expenses are generally shared in proportion to the parents’ incomes. Alberta Child Support Guidelines, ss 7(1), 7(2).
Understanding Section 7 Expenses in Alberta
In addition to regular child support, parents may need to address certain costs that fall outside ordinary household expenses.
These are commonly referred to as Section 7 expenses or special or extraordinary expenses.
Depending on the circumstances, they may include eligible child care costs, certain health-related expenses that are not covered by insurance, educational expenses, and extraordinary extracurricular activities.
These expenses are an important consideration because a child may participate in activities or require services that involve costs beyond those contemplated by the basic monthly child support amount.
For example, a child might require ongoing medical treatment that is not fully covered by insurance, or participate in an extracurricular program that qualifies as an extraordinary expense.
When determining how these costs should be shared, the parents’ respective incomes are generally relevant.
Consequently, an equal division of parenting time does not necessarily mean that every additional child-related expense will be divided equally.
Planning for Special Expenses in a Shared Parenting Arrangement
Special expenses can be an important subject for parents to address when discussing the financial details of a shared parenting arrangement.
Beyond determining monthly child support, it may be helpful to establish a clear understanding of how qualifying additional expenses will be managed.
Parents may wish to consider how expenses will be communicated, what documentation may be needed, and how payments or reimbursements will be handled.
These practical discussions can help both parents understand their respective financial responsibilities and reduce uncertainty when additional expenses arise.
Can Child Support Change if a Shared Parenting Arrangement Changes?
Parenting arrangements and financial circumstances can evolve over time.
A parent’s income may increase or decrease, a child’s needs may change, or the amount of parenting time exercised by each parent may become different from the original arrangement.
Because shared parenting child support calculations depend on the circumstances of the family, these changes may raise questions about whether an existing child support arrangement remains appropriate.
However, a change in circumstances does not necessarily mean an existing child support order automatically changes.
Parents who experience a significant change in their parenting arrangements or financial circumstances may benefit from obtaining legal advice about whether their existing child support obligations should be reviewed.
Understanding Your Child Support Obligations in Alberta
Every family’s circumstances are different, and calculating child support in a shared parenting arrangement requires attention to more than parenting schedules alone.
Parents may find it useful to have accurate information about their respective incomes, household expenses, parenting arrangements, and the additional costs associated with their children.
Having a clear understanding of these financial circumstances can make it easier to assess how the Alberta Child Support Guidelines may apply.
For parents going through separation or divorce, understanding the legal framework for child support can also help clarify expectations and support informed discussions about their children’s financial needs.
Shared parenting therefore means a tailored calculation—not automatically no support or a simple 50/50 split.
Additional Resources
Here are a few external resources that may be helpful to you. Ultimately, our family law experts will help guide you through this process.
- Government of Alberta — Family Law Legislation
- Federal Child Support Guidelines — Section 9
- Alberta — Changes to Federal Child Support Tables
Speak With an Alberta Family Lawyer About Shared Parenting and Child Support
Determining child support in a shared parenting arrangement can involve several interconnected financial and legal considerations. The applicable guideline amounts, each parent’s income, additional household expenses, and the child’s individual needs can all influence the outcome.
At Soby Boyden Lenz Family Law, our team understands that questions about parenting arrangements and child support can be an important part of the separation and divorce process.
If you have questions about shared parenting child support in Alberta, obtaining advice specific to your family’s circumstances can help you better understand your legal obligations and the considerations that may apply to your situation.
Contact Soby Boyden Lenz Family Law to discuss your family law matter and learn more about your options.
