Strategies to Maximize the Canada Child Disability Benefit

If your child was diagnosed with autism years ago but you never applied for the DTC, you can file retroactively. The CRA allows DTC applications to be backdated up to 10 years. If approved, the CDB is recalculated for all eligible years.

Retroactive CDB payments can be substantial, but the amount depends on each benefit year, income, eligible months, and the date CRA accepts. Do not estimate a lump sum from the current maximum alone.

To claim retroactively, submit Form T2201 with the DTC application. Indicate the year the disability began. The CRA will reassess your past tax returns and issue any owed CDB payments.

From July 2026 to June 2027, the CDB starts to decrease when adjusted family net income is more than $82,847. The reduction is 3.2% of income above that amount for one eligible child and 5.7% for two or more eligible children.

Moving income between spouses usually does not reduce combined adjusted family net income. Business allocations are also limited by tax law.

Use only lawful deductions that apply to your return. Ask a qualified tax professional before making tax-planning decisions for CDB.

The Registered Disability Savings Plan (RDSP) is a separate program but works alongside the CDB. Children approved for the DTC are eligible for the RDSP. The federal government matches RDSP contributions through the Canada Disability Savings Grant.

Families may choose to contribute CDB funds to an RDSP. Grants depend on contributions, income, age, available entitlement, and program rules. A deposit does not guarantee a match.

The Canada Disability Savings Bond is separate from the Grant. It may be available without personal contributions, depending on income and eligibility.