A good case formulation is the most useful thing you will build with a client — and often the hardest to teach. It is the bridge between assessment ("here is what's happening") and intervention ("here is what we'll do about it, and why"). Get the formulation right and the treatment plan almost writes itself. Get it wrong — or skip it — and you end up applying techniques without a map.
This guide walks through what a CBT formulation actually is, the two frameworks you'll reach for most (the 5 Areas model and the 5 Ps), how the disorder-specific models fit on top, and — most importantly — how to build one with your client rather than about them.
What a formulation is (and isn't)
A CBT formulation is a shared, provisional explanation of how a problem developed and, crucially, what keeps it going. Three words in that sentence are doing the heavy lifting:
Shared
— it is built
collaboratively
, in the client's own words, and it belongs to both of you. A formulation the client has never seen is a clinician's private theory, not a formulation.
Provisional — it is a hypothesis, not a verdict. You hold it lightly, test it against new information, and revise it. The first version is rarely the last.
Maintaining — CBT is most interested in the here-and-now cycles that keep a problem alive, because those are what you can intervene on. History matters, but the maintaining cycle is where change happens.
A formulation is not a diagnosis, a label, or a list of symptoms. It is a working model of mechanism — why this person, with this history, is stuck in this pattern, now.
The 5 Areas model (the cross-sectional "hot cross bun")
The most widely used starting point is the five-area model — often drawn as a "hot cross bun" — popularised in the UK by Padesky and Greenberger and by Williams' Five Areas approach. It takes a single moment (a recent, specific example) and breaks it into five interacting elements:
Situation / trigger — what was happening (external event, or an internal one like a sensation or memory).
Thoughts — the automatic thoughts and images that showed up ("I'm going to make a fool of myself").
Emotions — the feelings, and how intense (anxious 80%, ashamed 60%).
Physical sensations — racing heart, tight chest, hot face.
Behaviour — what the person did, or didn't do (left early, avoided eye contact, over-prepared).
The single most important feature — and the one most often lost when people simplify the model — is that the four internal areas are mutually bidirectional. Thoughts drive feelings and feelings colour thoughts; behaviour changes sensations and sensations prompt behaviour. The arrows go both ways. A formulation that draws behaviour only as an output (a downstream consequence) misses the point of the model: behaviour usually feeds back into the cycle, which is exactly why safety behaviours and avoidance maintain problems.
The cross-sectional formulation is your everyday workhorse — quick to draw in session, ideal for showing a client how a vicious cycle works the first time they see one.
Interactive worksheet
Cross-Sectional Formulation (5-Area Model)
Map a single moment across the five interacting areas — situation, thoughts, emotions, physical sensations and behaviour — to make a vicious cycle visible with your client.
The five-area model is a snapshot. To understand why this problem, for this person, you need the longitudinal view — and the 5 Ps is the most useful scaffold:
Presenting problem — what the client has come in with, here and now.
Predisposing factors — the vulnerabilities that loaded the dice: early experiences, temperament, family history, adversity, long-standing beliefs.
Precipitating factors — what triggered this episode: the redundancy, the bereavement, the health scare, the move.
Perpetuating factors — what maintains the problem now: the vicious cycles, the safety behaviours, the avoidance, the unhelpful coping. (This is where the 5 Areas cycle sits inside the longitudinal picture.)
Protective factors — strengths, supports, and resources to build on: relationships, values, past resilience, things that are going right.
Two clinical habits make the 5 Ps work. First, always include protective factors — a formulation that only catalogues deficits is demoralising and clinically incomplete; resilience and resources are part of the map. Second, anchor the perpetuating factors to a concrete maintaining cycle, so the longitudinal story and the moment-to-moment cycle connect.
Interactive worksheet
Longitudinal Formulation (Beckian)
Build the developmental picture — presenting, predisposing, precipitating, perpetuating and protective factors — to understand why this problem, for this person, now.
You don't choose one forever; you move between them.
Reach for the cross-sectional (5 Areas) model early, to make a single vicious cycle vivid, and whenever you want to intervene on a specific moment.
Reach for the longitudinal (5 Ps) model when the problem is recurrent, when core beliefs are clearly in play, or when you and the client need to understand how the pattern was built — typically a little later in therapy, once trust and shared language are established.
The disorder-specific models sit on top
The generic frameworks get you a long way, but the power of CBT is in the disorder-specific cognitive models — each one a refined, evidence-based account of the particular cycle that maintains a particular problem. They are not different kinds of formulation; they are the 5-area cycle, specified. A quick map (each links to a fuller guide):
Panic — Clark's model: bodily sensations are catastrophically misinterpreted ("this racing heart means I'm having a heart attack"), which amplifies the sensations, in an escalating loop.
Social anxiety — Clark & Wells: self-focused attention, a distorted self-image, and pre- and post-event processing keep the fear alive.
OCD — Salkovskis: intrusions are normal; it's the inflated-responsibility appraisal of them ("if I don't check, it'll be my fault") that drives neutralising and compulsions.
Generalised anxiety — Wells' metacognitive model: it's not the worry but the beliefs about worry — both positive ("worrying keeps me safe") and negative ("my worry is uncontrollable") — that maintain it.
PTSD — Ehlers & Clark: a sense of current threat arising from how the trauma memory is stored and appraised, kept going by avoidance and other maladaptive coping.
Depression — Beck's model: the negative cognitive triad (self, world, future) and reduced activity feeding a downward spiral.
Eating disorders — Fairburn's CBT-E: the over-evaluation of shape, weight and their control as the central hub.
When you use a disorder-specific model, use it faithfully — the details are the mechanism, and the mechanism is what you treat. (That's why the worksheets in the Formulate library are named to their source models.)
How to build a formulation collaboratively
A formulation is co-authored or it isn't a formulation. Some practical moves:
Start from a specific, recent example. "Tell me about the last time this happened" beats abstract generalities every time. Concrete examples give you real automatic thoughts, not theorised ones.
Use guided discovery, not explanation. Socratic questions ("when you noticed your heart racing, what went through your mind?") let the client find the links. People believe what they discover far more than what they're told.
Draw it where the client can see it. Build the diagram together, on a shared screen or on paper. The act of drawing the arrows is the intervention — it's often the first time a client sees the problem as a cycle rather than a personal failing.
Hold it as a hypothesis. "Does that fit? What have I got wrong?" A formulation the client can challenge is one they'll trust. Revise it openly as therapy progresses.
Name the leverage points. A good formulation doesn't just explain the problem — it points at where to push. Each maintaining factor is a candidate intervention: drop this safety behaviour, test this prediction, reintroduce this activity.
Common pitfalls
The clinician's-private-theory trap — a beautifully detailed formulation the client has never seen. If they can't explain it back to you, it isn't shared.
Behaviour-as-output-only — drawing behaviour as a one-way consequence and missing the feedback loop that actually maintains the problem.
Deficit-only longitudinal stories — all predisposing wounds, no protective strengths.
Over-simplifying the disorder model — collapsing the panic cycle to "anxiety → avoidance" and losing the sensation–misinterpretation loop that the treatment targets.
Formulate-once-and-forget — treating the first diagram as final rather than a living hypothesis you keep revising.
Frequently asked questions
Is a CBT formulation the same as a diagnosis?
No. A formulation is a shared, provisional explanation of how a problem developed and what keeps it going — a working model of mechanism, not a label. A diagnosis categorises; a formulation explains why this person, with this history, is stuck in this pattern, now, and points to where to intervene.
What is the difference between the 5 Areas and the 5 Ps?
The 5 Areas (situation, thoughts, emotions, physical sensations, behaviour) is a cross-sectional snapshot of a single moment — ideal for making a vicious cycle vivid. The 5 Ps (presenting, predisposing, precipitating, perpetuating, protective) is the longitudinal view of how the problem was built over time. You move between them: cross-sectional early and for specific moments, longitudinal for the deeper "why".
How do you build a formulation collaboratively?
Build it with the client from a specific, recent example, using guided discovery rather than explanation, and draw it where they can see it. Hold it as a hypothesis — "does that fit? what have I got wrong?" — and revise it as therapy progresses. A formulation the client can challenge is one they will trust.
Where to start
If you take one thing from this guide: build the cycle with the client, from a real example, and let them see it. Start cross-sectional to make the vicious cycle vivid, move to longitudinal when you need the deeper "why", and reach for the disorder-specific model that matches the problem in front of you.
If you'd like a head start, the Free Formulation Pack collects ready-to-use, evidence-based formulation templates — cross-sectional, longitudinal, and the major disorder-specific models — mapped to their source. It's free for therapists to use in session, supervision, or teaching.
Free Formulation Pack — evidence-based CBT formulation templates, mapped to their source. Send me the pack →
This article is for qualified therapists and trainees. Formulation tools are structures for collaborative clinical work, not a substitute for training, supervision, or clinical judgement.
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For use alongside professional support
Formulate provides educational CBT resources for use with a qualified therapist. They are not a substitute for professional assessment, diagnosis, or crisis care.
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Tarun Vermani is the founder of Formulate and a trainee clinical psychologist (DClinPsy). He writes about CBT formulation, outcome measurement, and the tools that help clients engage with therapy between sessions. These articles are educational, written for qualified therapists and trainees, and are intended to support — not replace — clinical training, supervision and judgement.
