CBT Case Formulation: Step-by-Step Guide with Examples (2026)

The 5-P model is one of the most widely used frameworks for structuring a CBT case formulation. Developed by Weerasekera (1996) and refined by Macneil et al. (2012), it organizes clinical data into five categories: **Presenting** — Current symptoms, problems, and functional impairments. **Predisposing** — Historical vulnerability factors (early experiences, temperament, developmental history). **Precipitating** — Recent triggers that activated the presenting problems. **Perpetuating** — Current maintaining factors (avoidance, safety behaviors, reinforcement patterns). **Protective** — Strengths, resources, and resilience factors that can be leveraged in treatment. The beauty of the 5-P model is its simplicity. It can be taught to trainees in a single supervision session and applied across diagnoses.

Writing a case formulation is both a science and an art. Here's the approach used by experienced CBT supervisors: **1. Start with the problem list.** Be concrete and measurable. "Panic attacks averaging 3/week, each lasting 10-20 minutes, triggered by crowded spaces" — not "anxiety." **2. Build a timeline.** When did problems start? What changed? Map life events against symptom onset and severity. **3. Identify cognitive patterns.** What themes emerge across situations? What cognitive distortions appear repeatedly? Use the downward arrow technique to get from surface thoughts to core beliefs. **4. Map the maintaining cycle.** This is the most important part. Draw the feedback loops: Trigger → Thought → Emotion → Behavior → Consequence → (back to Trigger). Where does avoidance short-circuit the cycle? **5. Identify treatment targets.** From your maintaining factors, which are most accessible? Which will produce the most change? Prioritize: behavioral activation and exposure first, cognitive restructuring of intermediate beliefs second, core belief work third. **6. Write the narrative summary.** 2-3 paragraphs connecting the dots: "Based on early experiences of X, Client developed core beliefs of Y, which led to intermediate rules of Z. When recent trigger A occurred, these beliefs were activated, producing automatic thoughts of B and maintaining behaviors of C."

A complete CBT case formulation document includes: **Header:** Client identifier (initials or ID), date, therapist name, session count. **Problem list:** 3-5 presenting problems, each with severity rating and functional impact. **Diagnostic impressions:** DSM-5/ICD-11 codes with supporting evidence. **Predisposing factors:** Early history summary (2-3 sentences). **Precipitating factors:** Recent triggers (1-2 sentences). **Core beliefs:** 1-3 identified or hypothesized core beliefs with supporting evidence. **Intermediate beliefs:** Rules, attitudes, assumptions, compensatory strategies. **Maintaining cycle diagram:** Visual feedback loop showing the perpetuating pattern. **Protective factors:** Client strengths, social support, motivation, previous coping. **Treatment plan:** Prioritized targets, proposed interventions, estimated timeline. **Formulation narrative:** 2-3 paragraph synthesis tying everything together. CBT Assistant Pro generates this entire structure from your session notes, with each section pre-populated based on accumulated data. You review, edit, and finalize.

**Client:** Michael, 42, accountant. Self-referred after 6 months of worsening depression. **Presenting problems:** Low mood (PHQ-9 = 18, moderately severe), social withdrawal (cancelled plans 12 times in past month), insomnia (averaging 4 hours/night), difficulty concentrating at work, loss of interest in hobbies. **Predisposing factors:** Emotionally distant father, bullied at school ages 12-14, first depressive episode at university (age 20, untreated). **Precipitating factors:** Best friend relocated abroad 8 months ago. Only remaining close friendship. **Core beliefs:** "I am fundamentally boring and not worth people's time." "If I reach out, people will reject me." **Intermediate beliefs:** "If I don't contact people first, I'll see that they never contact me — confirming I don't matter." Compensatory strategy: avoid initiating contact to avoid perceived rejection. **Maintaining factors:** Social withdrawal (reduces opportunities for positive reinforcement, confirms "nobody wants to see me"), reduced activity level (worsens mood via behavioral deactivation), rumination on past social failures, sleep deprivation amplifying negative cognition. **Protective factors:** Stable employment, supportive sister, previous positive therapy experience, motivated to change. **Treatment plan:** Phase 1 (weeks 1-4): Behavioral activation schedule, sleep hygiene. Phase 2 (weeks 5-10): Graduated social exposure, cognitive restructuring of rejection predictions. Phase 3 (weeks 11-16): Core belief work, relapse prevention.

Different therapy modalities approach formulation differently: | Model | Focus | Key question | |---|---|---| | **CBT** | Cognitive-behavioral maintaining cycles | "What thoughts and behaviors keep this going?" | | **Psychodynamic** | Unconscious conflicts and defenses | "What underlying conflict is being expressed?" | | **ACT** | Psychological inflexibility | "Where is the client fused with thoughts or avoiding experience?" | | **Schema Therapy** | Early maladaptive schemas and modes | "Which schemas are activated and what modes emerge?" | | **DBT** | Biosocial theory, chain analysis | "What chain of events led to the target behavior?" | CBT formulations are distinguished by their emphasis on *maintaining factors* — the current patterns that keep problems going, regardless of their origin. This makes them inherently treatment-oriented: change the maintaining factors, change the outcome.