British Columbia doesn’t have a “child tax exemption” in the sense of a line item on your provincial return. What the province offers is the BC Family Benefit, a monthly tax-free payment for families with children, and it stops when your child turns 18. The final deposit that includes money for that child lands in the same month as the birthday. After that, the provincial payment ends, whether or not the child is still in school or living at home.
Why 18 Is the Cutoff
Your child qualifies for the BC Family Benefit from birth until their eighteenth birthday. If the birthday falls in October, October is the last month you receive a payment for that child. The CRA uses birth records to end payments automatically, so you don’t need to send a notice when the date arrives.1Province of British Columbia. B.C. Family Benefit
The age-18 rule is a hard cutoff. There is no extension for full-time high school or post-secondary students, and no extension for children with disabilities under this provincial benefit. The federal Canada Child Benefit, which is delivered in the same monthly deposit, ends at 18 as well.2Canada Revenue Agency. Canada Child Benefit
One Provincial Payment That Runs a Year Longer
The BC climate action tax credit also includes an amount for dependent children, and it uses a different age line. Children under 19 qualify, so families get one additional year of the child portion of that credit after the Family Benefit ends. To receive the child amount, the child must be registered for the Canada Child Benefit.3Province of British Columbia. Climate Action Tax Credit
When Payments Can Stop Before 18
Two situations end the benefit early. If you move out of British Columbia, you lose eligibility for the provincial portion, even if you still qualify for the federal Canada Child Benefit. And in a shared custody arrangement, if a child begins living with you less than 40 percent of the time, only the other parent receives payments. Where the child lives with each parent at least 40 percent of the time, each parent gets exactly half the amount they would have received with full custody.2Canada Revenue Agency. Canada Child Benefit
The CRA determines who counts as the primarily responsible parent based on day-to-day care: meals, school, medical needs, and similar responsibilities. If you separate, gain or lose custody, or a child moves out of the home, contact the CRA directly rather than waiting until you file your next return.2Canada Revenue Agency. Canada Child Benefit
Keeping Payments Coming Until Your Child Turns 18
You don’t apply to the province. When you register your child for the federal Canada Child Benefit, usually as part of birth registration, the CRA automatically checks whether you qualify for the BC portion and adds it to your monthly payment.4Canada Revenue Agency. How to Apply – Canada Child Benefit
The most common reason families lose payments before the age-18 cutoff is a missed tax return. Both you and your spouse or common-law partner have to file a T1 return every year, even if one of you had no income. Without both returns, the CRA cannot calculate your entitlement, and payments stop until the filing is complete.1Province of British Columbia. B.C. Family Benefit