Disability Tax Credit (DTC)
The Disability Tax Credit (DTC) is a federal tax credit administered by the Canada Revenue Agency (CRA). For people living with PKU, UCDs, HCU, MSUD and related metabolic disorders, eligibility often comes through the category of life-sustaining therapy.
Important: The DTC is not only for people who are visibly disabled. For metabolic disorders, eligibility often recognizes the time required to prevent serious health complications through ongoing therapy.
On this page:
1. What is the Disability Tax Credit?
The Disability Tax Credit is a non-refundable tax credit that can help reduce income tax owing for eligible individuals or their supporting family members.
DTC approval may also help open the door to other federal supports, including the Child Disability Benefit, the Canada Disability Benefit, the Registered Disability Savings Plan, and related savings grants and bonds.
Applications are submitted using the T2201 Disability Tax Credit Certificate.
Helpful links:
CRA - Form T2201
CRA - Disability Tax Credit
2. Understanding eligibility for metabolic disorders
Many families hesitate to apply because they do not see themselves, or their child, as disabled. This is understandable.
For metabolic disorders, the DTC may recognize the time required to maintain health and prevent serious complications, rather than only the presence of visible symptoms.
For PKU and related disorders, life-sustaining therapy may include:
- Strict dietary management
- Medical formula, medical foods, or supplements
- Specialized food preparation
- Monitoring, bloodwork, and clinic coordination
- Tracking and managing daily intake
Generally, life-sustaining therapy must require 14 hours or more per week to meet the time requirement.
3. 2026 update - Proposed DTC changes
The Government of Canada has proposed changes to make the DTC application process easier for people with certain long-lasting medical conditions.
PKU is included in the list of conditions identified for a streamlined application process.
Important points:
- The eligibility criteria are not changing
- The 14-hour life-sustaining therapy requirement still exists
- The application process may become simpler for some PKU applicants
- CRA may still request additional information or clarification
We are monitoring how CRA updates the T2201 form and will update this page when more information is available.
Helpful link:
Government of Canada - Spring Economic Update 2026
4. PKU and other inherited metabolic disorders
PKU is now recognized as a therapy example on the government form, which has helped make the process clearer for many families.
For UCDs, HCU, MSUD and related disorders, medical practitioners may explain how the treatment requirements are similar to PKU.
Tip: If applying for MSUD, HCU or a UCD, referencing PKU may help explain the time, structure and medical necessity of therapy.
If additional help is needed, CanPKU+ is here to support families with these disorders too.
5. How to apply
Applications are submitted using the T2201 Disability Tax Credit Certificate.
- Part A is completed by the applicant, parent, caregiver, or representative
- Part B is completed and certified by a qualified medical practitioner
Because rare disorders are not always well understood, clear documentation can help explain the daily reality of treatment.
Helpful link:
CRA - Form T2201
6. Need help?
CanPKU+ provides additional support to members preparing a DTC application or re-application.
If you are unsure where to start, reaching out is a good first step. You do not need to navigate this alone.
Last updated: April 2026.
Programs, information, and resources may change over time.
If you notice anything that should be updated, please let us know at website@canpku.org.