ELI5 summary
How the CCB is reduced
The Canada Child Benefit is a tax-free monthly payment for families with children under 18. For the July 2025 to June 2026 benefit year, the maximum was $7,997 a year for each child under 6 and $6,748 for each child aged 6 to 17. Those amounts, and the income thresholds below, are indexed to inflation every July.
The benefit is reduced based on adjusted family net income (AFNI), which is essentially the net income of both parents combined, from line 23600 of each return. There are two reduction zones:
| Number of children | Reduction between the two thresholds | Reduction above the second threshold |
|---|---|---|
| 1 | 7% | 3.2% |
| 2 | 13.5% | 5.7% |
| 3 | 19% | 8% |
| 4 or more | 23% | 9.5% |
For the July 2025 to June 2026 year, the first threshold was $37,487 and the second $81,222 of AFNI. Above the first threshold, each extra dollar of family income cuts the benefit by the first-zone rate; above the second, by the lower second-zone rate on top of the maximum first-zone reduction.
Why deductions matter more to parents
RRSP and FHSA deductions are subtracted before line 23600, so they reduce net income and therefore AFNI. The value of a deduction for a parent is:
tax saved + CCB increase (+ any other income-tested benefit increase)
It does not matter which parent makes the deduction; AFNI combines both.
Worked example
A two-child family in Ontario has one parent earning $100,000 of taxable income and one at home, so AFNI is $100,000, in the second reduction zone. The working parent deducts a $10,000 RRSP contribution. Income tax falls by about $3,058 for 2026. AFNI falls to $90,000, still above the second threshold, so the CCB rises by 5.7% × $10,000 = $570 a year. Together, the deduction is worth about $3,628, or 36.3% of the contribution, compared with 30.6% from tax alone.
Worked example
Another two-child family in Ontario has AFNI of $60,000, in the first reduction zone, where the reduction rate is 13.5%. A $5,000 deduction saves about $1,254 of tax and adds 13.5% × $5,000 = $675 to the CCB. The total, about $1,929, is 38.6% of the deduction. For this family the benefit increase adds 54% on top of the tax saving.
The same logic applies to other income-tested payments, including the GST/HST credit, the Canada Workers Benefit and provincial programs such as the Ontario Child Benefit, the BC Family Benefit and Quebec’s family allowance. Each adds a little more to the value of a deduction for families in its phase-out range.
Timing: the benefit follows the tax year
The CCB for a benefit year from July to June is based on AFNI from the tax year that ended the previous December. A deduction claimed on your 2026 return, including a contribution made by March 1, 2027, changes the CCB paid from July 2027 to June 2028. You only see the increase if you file on time; late filing can interrupt payments.
What this means for the RRSP versus TFSA choice
The textbook rule compares your marginal tax rate now with your rate in retirement. For parents receiving the CCB, the rate now should include the benefit reduction, which can add 5.7 to 23 percentage points. That tilts the comparison toward the RRSP, and toward the FHSA if a first home is in the plan, during the years children are young. The TFSA remains the better place for money you may need soon, because TFSA withdrawals do not count as income and never reduce benefits.
Show the math
CCB(benefit year July Y+1 to June Y+2) = Σ maximum per child − reduction(AFNI_Y). Reduction = r1 × (min(AFNI, T2) − T1) for AFNI above T1, plus r2 × (AFNI − T2) above T2, where r1 ∈ {7%, 13.5%, 19%, 23%} and r2 ∈ {3.2%, 5.7%, 8%, 9.5%} by number of children. AFNI = combined line 23600 net income of the recipient and spouse or common-law partner, adjusted for UCCB and RDSP amounts. An RRSP deduction D changes the benefit by approximately D × the applicable reduction rate, as long as AFNI does not cross a threshold. Thresholds for July 2025 to June 2026: T1 = $37,487, T2 = $81,222; both are indexed each July.
Key takeaways
- The CCB is reduced by 3.2% to 23% of family income above indexed thresholds.
- RRSP and FHSA deductions raise the CCB as well as cutting tax.
- A deduction on the 2026 return changes payments from July 2027.
- In the first reduction zone, a two-child family’s combined saving can exceed 40% of a deduction.