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What Is a Material Change in Circumstances in Alberta Family Law?

Find out what kind of change lets you vary a support or parenting order in Alberta, what usually does not count, and how the test differs by type of order.

Family Law4 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 6, 2026
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Key takeaways
  • The legal test differs depending on whether the order is for child support, spousal support or parenting.
  • For child support, the Divorce Act asks for a change of circumstances as provided for in the guidelines, while the Alberta Family Law Act asks for a change of circumstances or evidence of a substantial nature that was not available at the previous hearing.
  • Your support amount does not change until a court has made an order.

You may have been told you need a material change in circumstances before an order can be changed. People use that phrase as shorthand, but the statutes use more specific wording, and it differs depending on the kind of order.

This article walks through the tests for child support, spousal support and parenting, gives examples of changes that may matter, and explains what to gather before you apply. Whether your change is enough depends on your facts, so a lawyer can confirm.

This article covers the law of Alberta.

The test depends on the type of order

Type of orderWhat the court must be satisfied of
Child support (Divorce Act)A change of circumstances as provided for in the applicable guidelines
Child support (Family Law Act)A change of circumstances, including those in the guidelines, or evidence of a substantial nature not available at the previous hearing
Spousal support (Divorce Act)A change in the condition, means, needs or other circumstances of either former spouse
Spousal or adult interdependent partner support (Family Law Act)A change in the condition, means, needs or other circumstances of either spouse or partner
Parenting (Divorce Act)A change in the circumstances of the child since the order was made
Parenting (Family Law Act)A change in the needs or circumstances of the child

Child support: what counts

Where the amount includes a determination under the applicable table, a change of circumstances is any change that would result in a different child support order or any provision of it. In plain terms, if the new numbers would produce a different table amount, that can be enough.

Where the amount does not include a table determination, the test is any change in the condition, means, needs or other circumstances of either spouse or of any child entitled to support. For orders made before May 1, 1997, the coming into force of s. 15.1 of the Divorce Act is itself a change of circumstances.

Alberta.ca says a court may consider changing child support when the circumstances of the payor or recipient have changed significantly. Its examples are:

Spousal support and parenting orders

For spousal support, the focus is on the condition, means, needs or other circumstances of either former spouse. For parenting, the focus is on the child. A move, a new work schedule or a child's changing needs may be relevant, but the question is how it affects the child.

Even when a change is shown, parenting decisions turn on the child's best interests, with primary consideration to the child's physical, emotional and psychological safety, security and well-being. A former spouse's terminal illness or critical condition is to be considered a change in the circumstances of the child.

What generally does not help

In a variation application under the Divorce Act, the court must not consider conduct that could not have been considered when the original order was made. The tests above each look for a change, and the court must be satisfied that one has occurred. Whether something is enough depends on the facts, so ask a lawyer about your situation.

If you have simply stopped paying or started paying less, that does not change the order. The recipient applies for an increase and the payor applies for a decrease, and the support amount does not change until the court has made an order.

What to do next

Start by writing down what changed and when. Then gather your documents. A payor generally needs the order, complete tax returns and Notices of Assessment for the past 3 years, and pay stubs or other proof of current income. A recipient needs the order, Notices of Assessment for the past 3 years, current income proof and a list of special expenses.

Frequently asked questions

Is there a set dollar amount of income change that counts?

How much of an income change is enough for a court variation depends on your situation, so it is worth confirming with a lawyer. Where the amount includes a table determination, any change that would result in a different order can qualify. The Recalculation Program has its own $10 per month threshold.

Does losing my job automatically lower my child support?

No. The support amount does not change until the court has made an order. A long-term change in employment income is one example Alberta.ca lists as something a court may consider.

Is the test the same for spousal support and child support?

No. Spousal support uses a change in the condition, means, needs or other circumstances of either former spouse. Child support uses a guidelines-based change under the Divorce Act, or in Alberta a change of circumstances or substantial new evidence.

Can I use the other parent's bad behaviour as the change?

Under the Divorce Act, the court must not consider conduct that could not have been considered when the original order was made. Whether particular facts count depends on your situation.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Alberta laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Alberta. Reach us at 1-844-900-1070 or send our Team a message.

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