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№ 77 Family Law

How to Change a Child Support Order in BC When Income Changes

Income went up or down? Learn how to apply to change a child support order in British Columbia, what disclosure to gather, and how arrears can build up.

Family Law5 min readTSLBy the Treadstone Law Team · British ColumbiaUpdated November 6, 2026
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Key takeaways
  • A court can change a child support order, prospectively or retroactively, if there is a change in circumstances as provided for in the child support guidelines.
  • A payor cannot end or reduce support by their own decision; the order continues until a court changes it.
  • Arrears and interest can keep building while you wait, so applying promptly matters.

Incomes change. A job loss, a raise, a new career or a reduced work schedule can make an existing child support order feel out of step with reality. The order still stands, though, until it is formally changed.

This article explains in general terms how a child support order can be changed in British Columbia, what financial information to gather, and why timing matters. Your own situation may differ, so treat it as a starting point.

This article covers the law of British Columbia.

The order stays in force until a court changes it

Every parent and guardian has a duty to provide support for the child. Support obligations under an order continue until the order is changed, suspended or terminated by a court under s. 152, and a payor cannot end it by their own decision.

This is why quietly paying less is risky. Arrears under a maintenance order bear simple interest at the rate set by regulation, and the court cannot reduce or cancel arrears except as the Act allows.

When can a child support order be changed?

Under Family Law Act s. 152, a court can change, suspend or terminate a child support order, prospectively or retroactively, on application, if a change in circumstances as provided for in the child support guidelines has occurred since the order was made. Under the Federal Child Support Guidelines s. 14, where the amount includes a table-based determination, a change of circumstances means any change that would result in a different child support order or any provision of it. Otherwise, it means any change in the condition, means, needs or other circumstances of either spouse or an eligible child.

There is also an exception. A child support order can be changed on substantial new evidence that was unavailable at the previous hearing, or where evidence of non-disclosure is discovered later, even without a guideline change in circumstances.

If your order was made under the federal Divorce Act, child support variation requires a change of circumstances as provided for in the applicable guidelines, and the variation order may be retroactive or prospective.

How the court recalculates

The amount of child support is determined under the child support guidelines, and the court may depart from them only in limited cases and must give reasons. In practice, a change in income is often the key fact, because a table-based amount depends on it. A lawyer can explain how the guidelines apply to your numbers.

Forms and disclosure

In Provincial Court, an application to change or cancel an order under the Family Law Act is made on Form 3 (Application About a Family Law Matter) with the schedule for the order type, such as Schedule 4 for child support, and a copy of the order or agreement is attached. The Supreme Court uses its Family Rules instead, and the forms and filing steps differ, so confirm them with a lawyer or the court registry.

Complete and honest financial disclosure matters. For non-compliance with a disclosure order, or incomplete, false or misleading disclosure, the court may draw an adverse inference, require security, or order expenses or a fine of up to $5,000.

Timing, arrears and what to do next

A payor who applies promptly to change support may get a retroactive reduction, because the court may reduce or cancel arrears when they are reduced or cancelled in a proceeding to change the order. A payor who waits risks arrears and interest continuing to accumulate. On a variation, the court may also vary an order without reducing or cancelling the aggregate of the arrears.

A proceeding under the Family Maintenance Enforcement Act is not itself a way to change support. Appeals from Provincial Court orders under that Act go to the Supreme Court, and a final family order can otherwise be challenged by appeal rather than variation.

Frequently asked questions

Can I just pay less if my income dropped?

No. Support under an order continues until a court changes, suspends or terminates it, and a payor cannot end it by their own decision. Unpaid amounts can become arrears that bear simple interest.

Can a change be made retroactive?

Yes, a court can change a child support order prospectively or retroactively if there has been a change in circumstances as provided for in the guidelines. Whether it will do so depends on the facts, and applying promptly helps.

Can we change support by agreement?

An existing court order continues until a court changes it, so a private agreement alone does not change what the order requires. A written agreement can be incorporated into an order by the court. A child support agreement is binding only if made after separation, or when the parties are about to separate and intend it to take effect on separation.

Which form do I use?

In Provincial Court, you use Form 3 with Schedule 4 for child support and attach a copy of the order. Supreme Court uses its Family Rules, so confirm the correct forms with a lawyer.

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. British Columbia 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 British Columbia. Reach us at 1-844-900-1070 or send our Team a message.

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