A functional capacity assessment (FCA) is often the most important piece of evidence in an NDIS planning process. Done well, it accurately documents the functional impact of disability and leads to a plan reflecting actual support needs. Done poorly, it leads to an underfunded plan and months of appeals.

This article is for clinicians writing FCAs and for participants and coordinators wanting to understand what makes one strong.

What a functional capacity assessment is

A functional capacity assessment is a clinical assessment that documents how a person's disability affects their daily functioning. It's not a diagnostic report — that's separate. The FCA's purpose is functional analysis.

A good FCA addresses:

Each of the NDIS six functional domains: communication, social interaction, learning, mobility, self-care, self-management.

The participant's strengths and capacities as well as limitations.

The supports needed to achieve the participant's goals.

The reasonable and necessary basis for those supports.

The expected trajectory — what's likely to improve, what's likely to stay the same, what may deteriorate.

Different participants need different types of FCA. A child with autism needs different assessment from an adult with chronic mental illness or a person with spinal cord injury. The clinical approach varies; the structure follows NDIS criteria.

Who can write one

NDIS doesn't specify exactly who must write an FCA, but practical reality is that NDIA gives most weight to assessments from clinicians with relevant expertise.

For physical disability:

Occupational therapists are the standard discipline.

Physiotherapists for mobility-specific assessment.

Some specialist medical practitioners (rehabilitation physicians, neurologists).

For psychosocial disability:

Psychologists or psychiatrists with NDIS-relevant experience.

Mental health nurses or social workers with appropriate qualifications.

The Evidence of Psychosocial Disability (EPD) form is the standard tool — completed by treating psychiatrist or specialist clinician.

For intellectual disability and autism:

Clinical psychologists with developmental experience.

Paediatricians and developmental specialists.

Multidisciplinary teams.

For other disabilities:

Speech pathologists for communication-related assessment.

Specialised disciplines as relevant.

The clinician's relationship to the participant matters. Long-term treating clinicians who know the participant well can write more grounded assessments than one-off assessors. But specialist NDIS assessors, properly briefed, can also write strong reports.

What NDIA looks for

NDIA decision-makers reading FCAs look for:

Specific functional impact. Not "patient struggles with daily living" but "patient cannot prepare meals safely without prompting; needs verbal cues to complete personal hygiene tasks; tires after 20 minutes of light household activity."

Connection to disability. How does the disability cause this impact? Without the disability, would these limitations exist?

Permanence. Is this expected to be lifelong? Or treatable? NDIA wants clarity on whether functional impact will improve.

Domain-by-domain analysis. Address each NDIS domain even if some don't apply (state that they don't apply and why).

Support recommendations grounded in evidence. What supports does the assessment indicate are needed? How much, of what kind, addressing which functional needs?

Consideration of informal support. What can family, friends, or partners reasonably provide? What can't they?

Goal-oriented framing. What does the participant want to do or be? How do supports enable those goals?

What NDIA doesn't want:

Vague generalities.

Wishlist-style support recommendations without functional grounding.

Reports that don't address NDIS-relevant domains.

Reports that confuse diagnosis with functional impact.

Reports that don't acknowledge participant strengths and capacities.

Common mistakes that lead to underfunding

Patterns that produce weak FCAs:

Brevity at the wrong level. Two-page FCAs rarely contain enough functional detail. Six-page FCAs that are mostly diagnosis and history don't help either. Functional analysis needs space.

Not addressing all domains. If the FCA only addresses physical mobility but the participant has communication and self-management needs, the assessment misses critical funding categories.

Vague language. "Patient sometimes needs help with daily activities" doesn't tell NDIA what to fund. Specifics do.

Disconnect between recommendations and assessment. FCA recommends 20 hours per week of personal care but the functional analysis only describes occasional difficulty. Mismatch undermines the recommendation.

Treating symptoms instead of disability impact. Lots of clinical detail about the diagnosis without translating into functional limitations.

Underclaiming. Some clinicians underclaim impact to seem moderate or balanced. NDIS isn't about moderate descriptions — it's about accurate descriptions.

No engagement with the participant's life. FCAs that read as if the clinician saw the participant for a single appointment without real understanding of their daily reality.

How to document ADL impacts clearly

Activities of daily living (ADL) and instrumental activities of daily living (IADL) are central to most FCAs. Strong documentation:

Be specific about what's affected. Is showering the issue? Dressing? Toileting? Medication? Be specific.

Quantify when possible. "Requires verbal cues for at least 80% of personal care tasks." "Cannot independently prepare meals; can heat pre-prepared food only." "Walks with assistance for 50 metres before needing rest."

Describe variability. Many disabilities have good and bad days. Document the range.

Document consequences. What happens when support isn't available? Skipped meals, missed medication, falls, hygiene neglect, social withdrawal.

Reference assessment tools. Specific scores from standardised assessments (Vineland, Functional Independence Measure, Modified Barthel Index, etc.) give NDIA quantitative reference points.

Include observations. What did you observe during assessment? Real-time observations are powerful.

Address both physical and cognitive aspects. A physical task may require both physical capacity and cognitive judgment. Address both where relevant.

Frequently asked questions

Can I update an existing FCA rather than starting fresh?

Updates can work if the existing assessment is recent (under 12 months). Older assessments usually need replacement.

Does NDIA accept FCAs done for other purposes (e.g. workers' compensation, DVA)?

They can be considered. NDIS criteria are specific, so non-NDIS assessments may need supplementation.

How do I know if my FCA is strong enough?

Have it reviewed by an experienced NDIS coordinator or advocate before submission. They can identify gaps.

Can I do my own FCA as a participant?

Self-completed assessments aren't the standard. NDIA wants clinical assessment from qualified clinicians. Participant input within a clinical assessment is appropriate.

How much should I expect to pay for an FCA?

Varies. Comprehensive FCAs from experienced clinicians range from $400 to $2,500+ depending on complexity, scope, and discipline. Some are NDIS-fundable as Capacity Building. Self-funded in many cases.

If you're a clinician writing FCAs and want to discuss approach with someone who reads many of them, Seareal works with clinicians across Queensland.