Can an activity I already do count as a CAS experience?

Yes, an existing interest can count if it fits a CAS strand and provides a meaningful opportunity for growth. Continuing exactly the same routine without a goal, challenge, or development may produce weak evidence. A regular pianist might learn an unfamiliar style, prepare a performance, compose original work, or mentor a less experienced musician. The important issue is not whether the activity is new, but whether you extend yourself purposefully and can explain the resulting learning. Agree on the proposed goal with your CAS coordinator before relying on the experience.

Can paid work count as CAS?

Paid employment is not normally accepted as CAS Service because Service is expected to be unpaid and voluntary. A job may also prioritize contractual duties over the personal growth and reciprocal community engagement expected in CAS. However, an unpaid initiative developed separately from your normal employment could potentially qualify if it meets the relevant criteria. For example, being paid to work in a sports centre is employment, while voluntarily designing an accessible community exercise session might become a separate CAS experience. Since school policies can be more specific, obtain approval before recording anything connected to paid work.

Does a one-day event count as a legitimate CAS experience?

A CAS experience can be a single event, so one-day participation is not automatically invalid. It still needs to fit at least one strand and create a real opportunity for engagement, growth, or learning. You should have a clear role rather than simply appearing for a photograph or attendance record. Preparation and follow-up can strengthen the experience, especially for Service involving a community need. A one-day event cannot by itself be your required CAS project because that project must be collaborative and last at least one month.

Can family responsibilities count for CAS?

Ordinary chores and expected family duties do not normally provide convincing CAS evidence. An exceptional responsibility may have genuine learning value, but personal circumstances must be handled sensitively and discussed with the CAS coordinator. Even then, the experience must fit a strand rather than merely involve effort or kindness. Caring for a relative, for example, should not automatically be converted into a portfolio entry, especially where privacy and dignity are involved. Never share photographs, medical details, or personal information without appropriate consent.

How many hours must a CAS experience last?

The IB does not set a universal minimum number of hours for an individual CAS experience. A single experience can be brief, while an ongoing one may continue for months. What matters is its purpose, connection to a strand, opportunity for growth, and place within a sustained overall CAS programme. The formal duration rule applies to the required CAS project, which must last at least one month and involve collaboration. Your school may track time for monitoring purposes, but a local logging system should not be confused with an IB-wide hourly completion requirement.

Does every CAS experience need a reflection and supervisor?

Your portfolio must contain enough reflection and evidence to demonstrate genuine engagement and achievement of the learning outcomes. The IB does not require an identical essay after every session, and excessive repetitive reflections add little value. Reflect at significant moments, such as the beginning, a challenge, a change of plan, or the conclusion of an experience. Supervisor expectations can vary by school, particularly for verification, safety, and approval, so follow your coordinator's procedures. Useful evidence may include supervisor confirmation, but also plans, drafts, products, feedback, correspondence, photographs, or records of decisions.

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What Counts as a Legitimate CAS Experience?

IB Diploma CAS IB Study Guides

• 3 Oct 2026•10

What Counts as a Legitimate CAS Experience?

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What Counts as a Legitimate CAS Experience? | RevisionDojo

Back to all posts

What Counts as a Legitimate CAS Experience?

IB Diploma CAS IB Study Guides

• 3 Oct 2026•10

A legitimate CAS experience is a specific, purposeful experience that fits Creativity, Activity, or Service, creates an opportunity for personal growth, and remains separate from your Diploma Programme course requirements. It may be a one-off event or continue over several weeks, but spending time on something does not automatically make it CAS.

September-November is a useful period for establishing sustainable experiences, collecting evidence, and testing potential project ideas. Understanding the criteria early prevents weak portfolio entries and rushed attempts to manufacture CAS later.

The official test for a legitimate CAS experience

The official IB CAS subject brief defines a CAS experience as a specific event in which a student engages with one or more CAS strands. It can be a single event or an extended series of events.

A legitimate experience must:

Fit one or more CAS strands
Build on an interest, skill, talent, or opportunity for growth
Offer opportunities to develop IB learner profile attributes
Remain separate from DP course requirements

Your experience should also support genuine reflection. You need to explain your intentions, decisions, difficulties, learning, and next steps, rather than merely report attendance.

What the three CAS strands mean

An activity does not count simply because you label it Creativity, Activity, or Service. Its substance must match the strand definition.

CAS strand	What it requires	Legitimate example
Creativity	Exploring and extending ideas toward an original or interpretive product or performance	Composing music, producing a short film, or developing a photography portfolio
Activity	Physical exertion contributing to a healthy lifestyle	Following a running programme, learning dance, or improving swimming technique
Service	Collaborative and reciprocal engagement with a community in response to an authentic need	Tutoring through a community organization or creating accessible resources requested by users

For Service, good intentions are insufficient. The need should be genuine, and the community should be treated as a partner rather than a passive recipient. Official IB CAS project guidance emphasizes purposeful activity, personal challenge, planning, significant outcomes, and reflection.

Examples that count, might count, or do not count

Context matters, so CAS cannot be reduced to a universal list of approved activities.

Situation	Likely status	Reason
Training weekly for your first 10 km run	Counts as Activity	It involves physical exertion, challenge, planning, and measurable development
Practising an instrument you already play	Might count as Creativity	It is stronger when directed toward new repertoire, technique, or a performance
Volunteering at a food bank after investigating its needs	Counts as Service	It responds to an authentic need and involves community engagement
Cleaning your bedroom	Does not normally count	It is routine personal responsibility rather than purposeful CAS engagement
Completing required IB Visual Arts work	Does not count separately	DP course requirements cannot also be claimed as CAS
Attending one club meeting without participating	Weak or invalid	Presence alone provides little evidence of intention, action, or growth

A routine activity can sometimes become legitimate CAS when its purpose changes. Ordinary cooking at home is unlikely to count, but testing nutritious recipes for a community workshop may fit Creativity and Service. The label does not transform the activity; your intention, responsibility, action, and learning do.

CAS experience versus CAS project

A CAS experience may be individual or collaborative, singular or ongoing. A CAS project is a collaborative series of sequential experiences lasting at least one month.

Every student must complete at least one project, but it may address one, two, or all three strands. It is a misconception that every project must combine multiple strands. RevisionDojo's guide to CAS projects versus CAS experiences explains the distinction.

Weekly football training can be an Activity experience. Working with teammates for six weeks to establish and run a beginner sports programme could qualify as a project because it includes collaboration, connected stages, planning, and sustained action.

Learning outcomes and credible evidence

CAS is not formally graded, and the IB does not impose a points score for each experience. Completion depends on evidence that you achieved all seven CAS learning outcomes across the overall programme:

Identify strengths and areas for growth
Undertake challenges and develop new skills
Initiate and plan a CAS experience
Show commitment and perseverance
Work collaboratively and recognize its benefits
Engage with issues of global significance
Recognize and consider the ethics of choices and actions

One experience does not need to demonstrate every outcome. Claiming all seven for a simple afternoon activity is usually less credible than supporting one or two with precise evidence.

Evidence might include plans, drafts, photographs, attendance records, correspondence, feedback, creative products, or supervisor confirmation. Evidence shows participation, while reflection explains learning. RevisionDojo's guide to what CAS coordinators want from reflections shows how to connect specific moments to outcomes.

Why experiences may be rejected

An experience may be questioned when:

It is part of an assessed DP subject, TOK, or the Extended Essay
The student has no meaningful participation or responsibility
Service does not respond to an authentic need
The activity is unsafe, unethical, deceptive, or disrespectful
Evidence was created retrospectively and cannot be verified
The entry describes hours without showing learning
School approval or safeguarding procedures were ignored

The IB does not prescribe the old 150-hour rule. CAS instead continues regularly for at least 18 months, with a reasonable balance across the strands. Schools may set local deadlines, approval systems, supervisor rules, and portfolio procedures, so consult your coordinator before starting anything unusual or potentially risky. RevisionDojo's guides to CAS minimum requirements and how CAS is evaluated distinguish IB requirements from local procedures.

A practical September-November CAS plan

September: choose and verify

Select two or three experiences you can sustain alongside schoolwork. Check the strand definitions, identify a genuine personal goal, and obtain approval where required. Record baseline evidence such as your initial skill level, schedule, or community consultation.

October: act and adjust

Participate consistently and document meaningful turning points. If something fails, explain how you adapted. This is also a sensible time to form a team and investigate an authentic need for your required project.

November: review the pattern

Audit your portfolio across the three strands and seven outcomes. Identify only the outcomes your evidence supports, and confirm that your project involves collaboration and a connected timeline of at least one month. Short reflections after significant sessions are more useful than reconstructed essays months later; RevisionDojo's guide to balancing CAS with academic work provides a realistic organizational approach.

Conclusion

A legitimate CAS experience is determined by purpose and substance, not an impressive title or a large number of hours. It must fit a strand, remain separate from DP course requirements, provide scope for growth, and be supported by credible evidence and reflection.

During September-November, prioritize sustainable experiences, verify uncertain ideas with your coordinator, and begin planning the required collaborative project. RevisionDojo's CAS study notes and Jojo AI can help organize evidence and strengthen reflections, while the portfolio itself must remain an honest record of your decisions and learning.

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The official test for a legitimate CAS experience

The official IB CAS subject brief defines a CAS experience as a specific event in which a student engages with one or more CAS strands. It can be a single event or an extended series of events.

A legitimate experience must:

Fit one or more CAS strands
Build on an interest, skill, talent, or opportunity for growth
Offer opportunities to develop IB learner profile attributes
Remain separate from DP course requirements

Your experience should also support genuine reflection. You need to explain your intentions, decisions, difficulties, learning, and next steps, rather than merely report attendance.