The deductibility of support payments depends on the type of payment, when the agreement was made, and whether there is a valid written agreement or court order. Child support is generally not deductible, while spousal support can be. The rules are similar for both federal and Quebec tax returns.
Tax Rules for Support Payments
Child Support: Agreements after April 1997: Child support payments under any court order or written agreement after April 1997 are not deductible by the payer and not taxable to the recipient.
Agreements before May 1997: Payments under agreements before May 1997 may be deductible for the payer and taxable for the recipient unless the agreement has been modified since that date. If an order does not distinguish between child and spousal support, the entire amount is considered child support and is not deductible. Spousal support payments are generally deductible by the payer and must be included as income by the recipient.
Conditions for deductibility:
- A written agreement or court order must exist.
- Payments must be made periodically.
- Parties must be separated due to a relationship breakdown.
- All child support payments must be fully paid for the current and prior years.
- Lump-sum payments: Generally not deductible for the payer or taxable for the recipient.
- Registration: Registering the court order or written agreement with the CRA using Form T1158 is recommended to avoid delays.
Claiming Support Payments: Total payments, including non-deductible child support, are reported on line 21999 of the T1 return and line 225 of TP1 return. Deductible spousal support payments are entered on line 22000. All child support payable must be fully paid before any spousal support deduction can be claimed.
Example:
John, a Quebec resident, made all 12 monthly support payments of $1,500 in 2025, consisting of $1,000 for child support (non-deductible) and $500 for spousal support (deductible).
Answer: John reported the total $18,000 on federal line 21999, deducted $6,000 on line 22000, and claimed $6,000 spousal support on Québec line 225.
Example:
John, a Quebec resident, paid $15,000 in 2025 ($1,500/month Jan–Oct), covering $12,000 child support (non-deductible.)
Answer: The remaining $3,000 toward the $6,000 spousal support is deductible; on the federal return, $15,000 is reported on line 21999 with $3,000 deducted on line 22000, and Québec line 225 claims $3,000 spousal support, as child support is always prioritized before any spousal support deduction.
Carry-forward of non-deductible support
In Québec, if a support-payment agreement includes both child and spousal support, all current and prior years’ child support must be fully paid before any spousal support is deductible.
To Process to calculate:
- Any unpaid child support for the year is treated as non-deductible support.
- Work Chart 225 is used to track total support required and amounts paid.
- If line 5 of Work Chart 225 is negative (i.e., less child support paid than required), the difference is carried forward to the next year and must be paid before any spousal support can be deducted in that year.
Example:
Suppose Danny is obligated to pay $10,000 annually in spousal support and only paid $8,000 last year. In the current year, Danny pays the full $10,000 for the current year plus the $2,000 arrears from the previous year.
Answer: Danny reports the total payment of $12,000 on the provincial tax return, enters the $2,000 arrears on line 276, and checks box 404.
Posted on 15 January, 2026