How to maximize your CCB with RRSP contributions

The Canada Child Benefit is not a flat payment. It is reduced against adjusted family net income, and an RRSP contribution lowers that income. One deposit therefore buys two things: a tax refund and a bigger benefit.

How the reduction works

For the 2026 benefit year the maximum is $7,997 per child under six and $6,748 per child aged six to seventeen. Nothing is clawed back below $37,487 of AFNI. Between $37,487 and $81,222 the reduction is steep; above $81,222 it flattens out.

A family with two children in the first band loses 13.5 cents of benefit per extra dollar of income. Reverse that: every dollar of RRSP deduction returns 13.5 cents of CCB — on top of the income tax it saves.

What that combines to

Take an Ontario family with two children and $90,000 of household income. A $10,000 RRSP contribution saves roughly $2,965 in income tax at a 29.65% marginal rate. It also pulls AFNI from $90,000 to $80,000, recovering benefit at 5.7% on the first slice and 13.5% below $81,222 — roughly $1,180 more CCB over the benefit year.

Three practical rules

• Contribute in the calendar year that matters. CCB for July 2026 to June 2027 is based on your 2025 return, so the benefit follows a year behind the deduction.
• The higher earner does not automatically get the deduction. AFNI is a family figure for CCB, but the income tax saving follows whoever claims it — so claim it against the higher marginal rate.
• Watch the $81,222 line. Crossing back below it is where the leverage is largest, because the reduction rate roughly doubles below it.

The CCB is the largest income-tested benefit most Canadian families receive. Treating it as fixed leaves real money on the table.