Child Support Calculator — Alberta

The Federal Child Support Guidelines were introduced in 1997 to bring consistency and predictability to child support in Canada. Before the guidelines, support amounts varied widely depending on which judge heard the case and the negotiating positions of the parties. The guidelines establish a formula that makes child support primarily a function of the payer's income and the number of children, reducing conflict and litigation over the base amount.

The guidelines apply to all married couples divorcing under the Divorce Act, and to unmarried parents in most provinces (including Alberta) under provincial family law legislation. Quebec has its own provincial child support model that operates somewhat differently. The Federal Child Support Tables have province-specific columns because provincial income tax rates differ — a person with $70,000 gross income in Alberta keeps more after-tax income than the same income in Ontario, so Alberta's table amounts are adjusted slightly.

The base table amount covers the child's ordinary everyday expenses: food, clothing, shelter, transportation, and similar regular costs. In addition to the base amount, both parents share certain designated special or extraordinary expenses (Section 7 expenses) proportionally to their incomes. Common Section 7 expenses include childcare costs that allow the custodial parent to work, extraordinary school fees, post-secondary education, medical and dental expenses not covered by insurance, and extracurricular activities that are consistent with the family's prior standard of living.

In sole (or primary) custody arrangements, one parent (the custodial parent) has the children more than 60% of the time. The other parent (the access parent) pays the full table amount based on their income and the number of children. This is the most straightforward application of the guidelines — look up the payer's income in the Alberta table, find the column for the number of children, and that monthly amount is the starting point for support.

Shared custody applies when each parent has the children for at least 40% of the time (roughly 146+ days per year). In this case, each parent is considered both a payer and a recipient, and Section 9 of the guidelines allows the court to consider both parents' table amounts, the actual increased costs of shared custody, and the conditions and means of each party. In practice, the most common shared custody calculation is the offset method: calculate each parent's table amount based on their respective income, then the higher-earning parent pays the difference.

Split custody applies when there are multiple children and each parent has primary care of at least one child — for example, two children where one lives primarily with the mother and one primarily with the father. In this situation, the guidelines say each parent calculates their table amount for the children in the other parent's care, and the higher obligation is offset against the lower one. The net result is the difference between the two amounts. Split custody situations often require detailed analysis and may benefit from legal advice to ensure the correct table amounts are applied.

In addition to the base table amount, parents share certain designated expenses proportionally to their incomes. The most common Section 7 expense is childcare — daycare, after-school care, or summer camp costs that allow the lower-earning parent to work, attend school, or pursue training. If the custodial parent pays $1,500/month in daycare and the parents earn $70,000 and $50,000 respectively, the paying parent contributes $70,000 ÷ ($70,000 + $50,000) = 58.3% of the childcare cost, or roughly $875/month on top of the base support amount.

Medical and dental expenses above those covered by benefits plans, orthodontic treatment, and extraordinary medical needs are also Section 7 expenses. Educational expenses that are extraordinary — private school tuition, tutoring for a diagnosed learning disability, post-secondary tuition — qualify as well. Extracurricular activities can be Section 7 expenses if they're consistent with the family's prior standard of living and the family's capacity to pay. Parents can agree on how to handle these expenses or apply to court if they disagree.

To calculate your total support obligation including Section 7 expenses: add up the annual cost of all qualifying expenses, subtract any government subsidies or tax benefits received, and multiply by your proportional income share. This additional amount is paid monthly or reimbursed upon presentation of receipts, depending on your agreement or court order. Keeping accurate records of all Section 7 expenses throughout the year is important for year-end reconciliation and to support any future variation applications.