Disability Tax Credit (DTC)
A non-refundable tax credit for people with a severe and prolonged impairment. Approval also unlocks the RDSP, the Canada Disability Benefit and the Canada Workers Benefit disability supplement.
Who it's forPeople whose ADHD makes them unable to perform mental functions like attention, memory or emotional regulation, or take three times longer than others, all or nearly all the time (generally 90%) for at least 12 months, even with treatment. A diagnosis alone does not qualify.
- What it's worth: Disability amount of $10,341 for 2026 ($10,138 for 2025), plus a supplement for under-18s. Claims can go back up to 10 years.
- Effort: Part A takes minutes in your CRA account. Your practitioner completes Part B. CRA aims to decide within 8 weeks.
Heads up. The bar is high: the limits must be there nearly all the time, not just on bad days. You don't need a paid service. A 2021 federal cap of $100 on what filing firms charge has been suspended by a court ever since, so ask about fees before you sign anything.
How to do it (4 steps)
- Complete Part A in your CRA account or by phone, and tick the box asking CRA to adjust past years.
- Give the reference number to a doctor, nurse practitioner or psychologist who knows you well.
- They describe your daily limits in Part B and submit it online.
- When the approval notice arrives, claim the amount on line 31600.
Sources
- canada.ca/en/revenue-agency/services/tax/individuals/se… (opens in a new tab)
- canada.ca/en/revenue-agency/services/tax/individuals/se… (opens in a new tab)
- canada.ca/en/revenue-agency/services/tax/individuals/se… (opens in a new tab)
- canada.ca/en/revenue-agency/services/tax/individuals/se… (opens in a new tab)
- canada.ca/en/revenue-agency/services/tax/individuals/fr… (opens in a new tab)
- canada.ca/en/revenue-agency/services/about-canada-reven… (opens in a new tab)
- canada.ca/en/revenue-agency/services/tax/individuals/se… (opens in a new tab)
Checked October 31, 2026.

