Mental functions necessary for everyday life: The cognitive and psychological functions required to manage daily life independently, including memory, problem-solving, goal-setting, judgment, adaptive functioning, and the ability to regulate behaviour and emotions.

For a comprehensive overview of the DTC, see our Complete Guide to the Disability Tax Credit in Canada.

Why Mental Functions Is the Most Common DTC Category

Mental functions necessary for everyday life is the most frequently claimed DTC category — and also one of the most frequently denied. This is because mental health and cognitive conditions are inherently more difficult to describe in the functional terms CRA requires. Unlike walking (where a measurable distance and time can be documented) or vision (where clinical thresholds exist), mental functions require the practitioner to describe cognitive and behavioural impacts that are often invisible to outside observers.

What CRA Evaluates

CRA assesses whether a person's mental functions are markedly restricted by evaluating their ability to perform the following cognitive tasks independently and within a reasonable timeframe:

Mental Function	What CRA Assesses
Memory	Can the person remember to complete routine tasks, appointments, and daily responsibilities?
Problem-solving	Can the person identify problems and develop solutions in everyday situations?
Goal-setting	Can the person set realistic goals and create plans to achieve them?
Judgment	Can the person make safe, appropriate decisions in daily life?
Adaptive functioning	Can the person adapt to changes in routine or unexpected situations?
Behaviour regulation	Can the person regulate emotions and behaviour appropriately in social and personal contexts?

Common Qualifying Conditions

The following conditions frequently qualify under the Mental Functions category. Click any condition for a detailed guide including CRA evaluation criteria, required documentation, and how My Benefits Canada can help:

Marked Restriction Indicators

CRA looks for the following indicators when assessing mental functions:

Requires supervision for safety or daily tasks
Takes 3x time for decision-making or routine tasks
Cannot manage daily routines without support
Severe behavioural dysregulation
Inability to plan, sequence, or remember steps

The Challenge of T2201 Language for Mental Functions

The most common reason mental functions DTC applications are denied is that the T2201 form describes the diagnosis without adequately describing the functional impact. For example:

Insufficient Language	Effective Language
"Patient has ADHD"	"Patient requires supervision for daily task completion and takes approximately three times longer than peers to plan, sequence, and execute routine activities, all or substantially all of the time"
"Patient experiences anxiety"	"Patient's anxiety causes inability to manage daily routines without support, including inability to independently plan meals, manage appointments, or make routine decisions"
"Patient is on the autism spectrum"	"Patient requires daily supervision for safety and is unable to adapt to changes in routine without significant behavioural dysregulation, present all or substantially all of the time"