If you're searching "how is child support calculated in Alberta," you're probably in the middle of a separation, a new parenting arrangement, or a change in income, and you want a straight answer. The short version: child support generally starts with a table lookup based on income, but a few other factors can shift that starting point — and one of those factors changed recently.
Child support is the right of the child, not something either parent can bargain away. Alberta courts and the federal government both treat it that way: support is meant to reflect what a child would generally have had the benefit of if their parents lived together.
On October 1, 2025, updated Federal Child Support Tables came into effect across Canada, including Alberta. Whether you're working out a new amount or wondering if an existing Edmonton-area order still reflects current figures, the date matters. This article walks through how the base amount is actually worked out — income, the tables, shared and split parenting, and unclear income — then points to a separate article for the add-on costs that can sit on top of that base amount.
How is child support calculated in Alberta?
Child support in Alberta is generally calculated by applying the Federal Child Support Tables to a paying parent's income, then adjusting for specific circumstances such as shared parenting or additional child-related costs.
At a high level, reaching a child support amount generally follows these steps:
- Determine each parent's income under the Federal Child Support Guidelines
- Identify the number of children being supported
- Apply the Federal Child Support Table for the paying parent's province of residence
- Adjust the approach if parenting time is shared or split between the parents
- Add any applicable section 7 special or extraordinary expenses on top of the table amount
This applies whether a family proceeds under the federal Divorce Act or Alberta's Family Law Act — both rely on the same Federal Child Support Guidelines and tables for this base calculation.
Does the Divorce Act or Alberta's Family Law Act apply to my situation?
Which law applies generally depends on whether the parents were married. Married or divorcing (or already divorced) parents generally proceed under the federal Divorce Act, typically in the Court of King's Bench of Alberta. Parents who were never married, including adult interdependent partners, generally proceed under Alberta's Family Law Act, often in the Alberta Court of Justice.
For Edmonton families, this affects procedure and which court a claim is filed in — it does not generally change how the base support amount is calculated, since both statutes direct the same Federal Child Support Guidelines and tables. Because jurisdiction can involve exceptions, confirm which process applies to your situation with a family lawyer.
How is the paying parent's income worked out?
A parent's income for child support purposes generally starts with their total income as reported to the Canada Revenue Agency, then may be adjusted under specific rules in the Federal Child Support Guidelines.
Documents typically used to establish income include:
- Recent Notices of Assessment and filed tax returns
- Pay stubs and employment letters
- Financial statements for self-employment or business income
- Records of other income, such as rental or investment income
Because the table amount flows directly from this figure, complete and honest financial disclosure from both parents is usually the first practical step in any child support discussion.
What are the Federal Child Support Tables, and how do they set the amount?
The Federal Child Support Tables set a base monthly amount using three main inputs:
- The paying parent's income
- The number of children being supported
- The paying parent's province of residence
Because the tables are organized by province, a parent in Alberta and a parent with a similar income elsewhere in Canada can see a different result — the tables are not one national number. Once income and the number of children are established, the table amount is generally applied consistently, except where circumstances covered below — shared parenting or unclear income — change the approach.
What changed with the new 2025 Federal Child Support Tables?
The current Federal Child Support Tables came into effect on October 1, 2025, replacing the previous tables used across Canada.
If a family already has an order or agreement from before that date, the new tables do not automatically apply to it — the federal government has been explicit that the 2025 tables will not automatically apply to a child support order made before October 1, 2025. If recalculating support under the new tables would produce a different amount, though, that difference may be treated as a change in circumstances, allowing either parent to ask a court, or an available recalculation service, to review the amount going forward.
In Alberta, parents with an existing order or agreement may also be able to use the Alberta Child Support Recalculation Program, an administrative option for updating support based on current income without necessarily returning to court. Confirm current eligibility and process directly, as program rules can change.
How does shared or split parenting change the calculation?
Shared parenting can change how child support is calculated, but reaching a particular percentage of parenting time does not automatically produce a different result — it opens the door to a different approach rather than guaranteeing one.
Under the Federal Child Support Guidelines, when a parent exercises parenting time with a child for not less than approximately 40 percent of the year, a court may move away from a straightforward table lookup and instead consider:
- The table amount each parent would otherwise pay based on their own income
- The increased costs generally associated with shared parenting arrangements
- The conditions, means, needs, and other circumstances of each parent and of the children
This is often called a "set-off" approach informally, though the amount actually reached depends on the family's specific facts, not a fixed formula. Split parenting is different: it applies when there are two or more children and each parent has the majority of parenting time with at least one child, with the table amounts generally worked out in each direction and offset against one another.
What happens if a parent's income is unclear, or seems too low?
When a parent's real income is hard to verify — because they are self-employed, paid partly in cash, receiving benefits in kind, or appear intentionally under-employed or unemployed — a court can impute an income to that parent for child support purposes rather than relying only on what's reported.
Imputing income means the court assigns a figure it considers more realistic, based on evidence such as work history, qualifications, past earnings, and the current job market, even where that differs from what appears on paper. Full and honest financial disclosure from both parents generally reduces the likelihood of this becoming a contested issue.
How do section 7 special expenses fit alongside the table amount?
Section 7 special and extraordinary expenses are additional child-related costs — certain childcare, medical, or extracurricular expenses — that sit on top of the base table amount rather than replacing it. The table amount and section 7 expenses are worked out differently, as summarized below.
| Base table amount | Section 7 special expenses | |
|---|---|---|
| What it covers | General, day-to-day costs of raising a child | Specific added costs, such as certain childcare, medical, or extracurricular expenses |
| How it's set | Federal Child Support Tables, based on income, number of children, and province | Assessed expense by expense against a "necessary and reasonable" test |
| How it's shared | Generally paid in full by the paying parent, per the tables | Generally shared between parents, often in proportion to income |
We cover section 7 expenses in more depth — including what typically qualifies and how they tend to be divided — in our article on special and extraordinary expenses.
Common questions
Does the 2025 table update automatically change my existing Alberta support order?
No. An order or agreement made before October 1, 2025 continues to apply as written; the new tables become relevant if recalculating under them produces a different result, which may then support a request to change the order.
Do both parents have to disclose their income for child support?
Generally, yes. Accurate calculations depend on both parents providing honest, complete financial information, and disclosure is typically ongoing as incomes change.
Is child support the same as a parenting arrangement?
No. Child support addresses the financial contribution to raising a child; a parenting arrangement addresses where a child lives and how time and decisions are shared. The two are connected — parenting time can affect the calculation — but they're legally separate questions. See our article on parenting arrangements for more on that topic.
Practical takeaway
The base amount of child support in Alberta generally comes down to three things: a parent's income, the number of children, and which Federal Child Support Table applies — with shared parenting, split parenting, or unclear income changing the approach in specific, defined ways. The October 2025 table update adds one more question worth checking: whether an existing order still reflects current figures.
This article is general information only and is not legal advice. If you are trying to determine or review a child support amount in Edmonton or elsewhere in Alberta, speak with a family lawyer about your specific circumstances.