Your adjusted family net income is the single figure the Canada Revenue Agency uses to decide how much you get from the Canada Child Benefit, the GST/HST credit, the Canadian Dental Care Plan, and several other income-tested programs. It combines your net income with your spouse or common-law partner’s, then strips out certain government supports so that receiving one benefit doesn’t shrink another. Understanding how AFNI is built, and what moves it, is what keeps you from being surprised by a smaller payment or a repayment notice.
How AFNI Is Calculated
The starting point is Line 23600 on each partner’s T1 return, which shows net income after most deductions.1Canada Revenue Agency. Line 23600 – Net Income If you have a spouse or common-law partner, both Line 23600 figures are added together. From that combined total, the CRA subtracts any Universal Child Care Benefit income (Line 11700) and any Registered Disability Savings Plan income (Line 12500). If either partner repaid UCCB or RDSP amounts during the year, those repayments (Lines 21300 and 23200) are added back.2Canada Revenue Agency. Canada Child Benefit (CCB) – How Much You Can Get
The reason for those adjustments is simple. The UCCB and RDSP are themselves government supports, so counting them as regular income would create a circular problem where receiving one benefit pushes you out of another. Removing them gives the CRA a cleaner view of what your household actually earns from work, investments, pensions, and other standard sources.3Canada Revenue Agency. Canada Child Benefit and Related Federal, Provincial, and Territorial Programs
The UCCB was replaced by the CCB in 2016, so most families won’t have UCCB amounts on current returns. The formula still references it to account for lingering repayments or reassessments from earlier years. For most households today, AFNI is simply combined Line 23600 minus any RDSP income, plus any RDSP repayments.
Which Benefits Use AFNI
Every program below pulls from the same AFNI figure, so a single error on your return can ripple across several payments at once.
Canada Child Benefit
For the July 2025 to June 2026 benefit year, the maximum CCB is $7,997 per year for each child under 6 and $6,748 per year for each child aged 6 through 17. Families with an AFNI below $37,487 receive the full amount. Between $37,487 and $81,222 a first-tier reduction applies, and above $81,222 a second-tier reduction takes over. The percentage used depends on the number of children in the household, and at high enough incomes the benefit reaches zero.2Canada Revenue Agency. Canada Child Benefit (CCB) – How Much You Can Get
Canadian Dental Care Plan
AFNI decides both eligibility and your co-payment share. To qualify, your AFNI must be under $90,000, you must be a Canadian resident for tax purposes, you and your spouse (if applicable) must have filed tax returns, and you must not have access to private dental coverage through an employer, pension, professional organization, or any plan you could purchase.4Government of Canada. Canadian Dental Care Plan – Do You Qualify That last point catches people out: declining your employer’s dental plan doesn’t restore eligibility, because access alone is disqualifying.
Once you qualify, your co-payment depends on income:
- AFNI under $70,000: no co-payment; the government covers the full CDCP fee.
- AFNI between $70,000 and $79,999: you pay 40%, the government pays 60%.
- AFNI between $80,000 and $89,999: you pay 60%, the government pays 40%.
These percentages apply to the CDCP fee schedule, not necessarily what your dentist charges. If a provider’s rate exceeds the CDCP fee, you cover the difference on top of your co-payment.5Government of Canada. Examples of Co-payments and Additional Charges Factsheet
GST/HST Credit
The quarterly GST/HST credit uses the same AFNI figure, together with your marital status and the number of eligible children under 19.6Canada Revenue Agency. GST/HST Credit – How Much You Can Get Above the phase-out threshold the credit shrinks and eventually disappears. The CRA won’t send a notice when your income is too high to qualify.
Canada Workers Benefit
The CWB is a refundable credit for low-income workers. For the 2025 tax year, a single person without children becomes ineligible once adjusted net income exceeds roughly $37,742, and families lose eligibility around $49,393 in most provinces. Quebec, Nunavut, and Alberta use different thresholds, and a disability supplement extends the phase-out range.7Canada Revenue Agency. Canada Workers Benefit (CWB) – Who Is Eligible
Why Last Year’s AFNI Governs This Year’s Payments
The CRA doesn’t adjust benefits in real time. It works on a July-to-June cycle, recalculating each July using the tax return you filed for the previous calendar year.8Canada Revenue Agency. Payment Dates – Canada Child Benefit (CCB) Payments between July 2025 and June 2026 are based on your 2024 AFNI. In July 2026, your 2025 return takes over.
That lag cuts both ways. A high-income year in 2024 followed by a job loss in early 2025 won’t shrink your benefit picture until July 2026. A big raise in 2025 won’t trim your payments until that same date. Filing on time matters because the CRA cannot recalculate without a completed return, and late filers often see benefits paused entirely until the return arrives.
Life Changes That Shift Your AFNI
Some events force a recalculation outside the normal July cycle. The most common is a change in marital status. Marriage, a new common-law partnership, separation, or divorce must be reported to the CRA by the end of the month following the change. Report a March marriage by the end of April. The adjustment starts the month after the status changed, and the CRA warns against waiting until tax season to report it.9Canada Revenue Agency. Update Your Personal Information With the CRA – Change Your Marital Status
The recalculation can push either direction. A new partner with meaningful income raises your AFNI and usually cuts your benefits. A separation drops the higher-earning partner’s income from the calculation and can increase payments substantially.
Shared Custody
When you share custody, the CRA treats the arrangement as shared if the child lives with each parent roughly 40% to 60% of the time. Each parent then receives 50% of the CCB they would have received as the sole caregiver, calculated using their own AFNI.3Canada Revenue Agency. Canada Child Benefit and Related Federal, Provincial, and Territorial Programs If a child lives with you less than 40% of the time, you receive no CCB for that child.
Death of a Spouse
When a spouse or common-law partner dies, contact the CRA as soon as possible so benefits can be recalculated on the surviving partner’s income alone. Delays can create overpayments that have to be repaid later.10Canada Revenue Agency. Notify the CRA of a Date of Death
Newcomers and World Income
If you recently became a Canadian resident, your AFNI includes world income from all sources, inside and outside Canada, converted to Canadian dollars, for the portion of the year you were a resident. When claiming credits that depend on spousal income, you must report your spouse’s net world income for the full tax year, whether or not they live in Canada.11Canada Revenue Agency. Completing Your Return for Newcomers Income earned in a country with a Canadian tax treaty may be exempt from Canadian tax but still has to appear on the return, with the exempt portion deducted on Line 25600.
If You’re Overpaid
If a reassessment or an unreported life change shows that you received more than you were entitled to, the CRA sends a notice with a remittance voucher. The main recovery tool is withholding future payments: all or part of your upcoming CCB, GST/HST credit, Canada Carbon Rebate, and income tax refunds can be kept until the debt clears.12Canada Revenue Agency. Balance Owing – Benefits Overpayment CCB payments are only held back to recover CCB overpayments, not other tax debts.
CWB overpayments come out of your income tax refund, and the CRA can hold back future CWB advance payments. GST/HST credit overpayments, in contrast, can be applied against other tax debts, not only GST/HST balances.12Canada Revenue Agency. Balance Owing – Benefits Overpayment The CRA’s prescribed interest rate on overdue amounts was 7% annually in the second quarter of 2026.13Canada Revenue Agency. Prescribed Interest Rates: 2026 – Q2
The most common trigger for an overpayment is failing to report a change in marital status promptly. Adding a higher-earning partner raises your AFNI retroactively for the months between the actual change and the date you report it, creating a gap where benefits were calculated on your income alone. Filing your return on time and reporting life changes within the month-end deadline are the two habits that prevent it.