therapy approaches

What to Expect in Internal Family Systems (IFS) Therapy

Shayan Salar, LCSW, LCADC · 7 min read

Internal Family Systems (IFS) therapy is a non-pathologizing approach that treats the mind as a system of distinct parts, each with its own role and history, alongside a core Self capable of leading the system with compassion. The work focuses on understanding and unburdening those parts rather than eliminating them.

IFS was developed by family therapist Richard Schwartz in the 1980s and has accumulated a growing evidence base over the past decade, particularly for trauma, depression, and anxiety. I integrate IFS regularly in my practice, often alongside Somatic Experiencing and psychodynamic work, because the model gives clients a way to engage with their internal experience that respects rather than pathologizes how their system has learned to survive.

What is Internal Family Systems therapy?

IFS is a model of psychotherapy developed by Richard Schwartz in the early 1980s while he was a family therapist at the Institute for Juvenile Research in Chicago. Working with clients who had eating disorders and trauma, he noticed they consistently described their internal experience as different parts of themselves, each with distinct voices, motivations, and emotional responses. Rather than treating those parts as symptoms to be eliminated, Schwartz began engaging them directly.

The model rests on three core ideas. First, that the mind is naturally multiple, made up of subpersonalities with their own histories and intentions. Second, that every person also has a Self that is intact, undamaged by experience, and capable of leading the internal system. Third, that healing happens when the Self builds trust with the parts and helps them release the burdens they've been carrying.

In short, IFS is a structured way of working with the inner system that already exists, rather than fighting against it.

What are parts in IFS, and what is the Self?

In IFS, a part is a subpersonality with its own viewpoint, history, and emotional repertoire. Parts are not pathological; they're how the mind organizes complex experience over time. Schwartz grouped parts into two functional categories.

Protectors are the parts working to manage the system. Managers are proactive, planning and controlling daily life to keep painful material from surfacing. Firefighters are reactive, stepping in when pain breaks through anyway, often through distraction, numbing, or impulsive behavior.

Exiles are the parts carrying the original pain — typically younger parts that experienced overwhelming events and were sealed off from awareness so the rest of the system could function. They hold the painful beliefs and emotions the protectors work hard to contain.

The Self is the part of you that is not a part. It's the seat of compassion, curiosity, and calm that all clients have access to, regardless of how loud their protectors are. The work of IFS is helping clients lead from Self.

What happens in an IFS session?

A typical session begins with whatever a client brings in: anxiety, a recent conflict, a stuck pattern, a difficult emotion. Rather than analyzing the content directly, I help the client notice which part of them is showing up in response to it. We might find a manager exhausted from holding things together, a firefighter that wants to numb out, or a younger exile activated by something recent.

From there, I guide the client through a process Schwartz calls the 6 Fs: find the part, focus on it, flesh out its qualities, notice how you feel toward it, befriend it by getting curious about its role, and ask about its fears. The aim is for the client's Self to build a relationship with the part rather than fight, ignore, or be hijacked by it. If the part trusts the Self, real work can happen. If it doesn't yet, we slow down and build that trust first.

In short, an IFS session is a guided internal conversation, with the client doing the relational work and me tracking and steadying the process.

What conditions does IFS work well for?

IFS works well for conditions where the central challenge is the relationship between the person and their own internal experience. Complex trauma is the clearest indication: childhood trauma typically produces a system of protective parts that have been working overtime for years, and IFS gives clients a way to engage those parts respectfully rather than overriding them.

It also fits anxiety presentations driven by overactive manager parts, depression maintained by inner critics and shame-based exiles, burnout shaped by manager parts running at unsustainable capacity, and substance use where firefighter parts have taken on the job of regulating pain through external means.

I often use IFS alongside Somatic Experiencing when a client's protective system has settled deeply into the body. IFS is generally not the first choice for acute crisis stabilization, active psychosis, or severe untreated dissociation; in those situations the system needs different scaffolding first. With dissociation in particular, careful pacing is non-negotiable.

How is IFS different from CBT or talk therapy?

The clearest difference is what each therapy treats as the unit of change. CBT works at the level of thoughts and behaviors: identify the distortion, restructure it, change the response. Standard talk therapy works at the level of narrative: understand the story, develop insight, integrate it.

IFS works at the level of the internal system itself. The thoughts and feelings aren't the target of intervention — the parts producing them are. The goal isn't to argue with a critical inner voice or replace it with a more rational one; it's to understand why that voice exists, what it's protecting, and what it needs in order to step back.

In short, CBT and talk therapy change the content. IFS changes the relationship.

What does the research say about IFS effectiveness?

The evidence base for IFS is growing but still developing. In 2015, SAMHSA added IFS to its National Registry of Evidence-Based Programs and Practices, rating it effective for general functioning and promising for depression, anxiety, and phobias.

A 2021 pilot study of 17 adults with PTSD and a history of multiple childhood traumas found that after 16 weekly 90-minute IFS sessions, 92 percent no longer met diagnostic criteria for PTSD at one-month follow-up, with large effect sizes. A 2025 scoping review in Clinical Psychologist analyzed 27 peer-reviewed studies, including two RCTs, and identified IFS as a promising approach for PTSD, depression, and chronic pain. The IFS Institute itself acknowledges that more large-scale RCTs are needed.

Bessel van der Kolk endorsed IFS in The Body Keeps the Score in 2015, which significantly raised its profile in the trauma field. Recent critiques have flagged that aggressive parts work without adequate pacing can destabilize vulnerable clients — a clinical caution worth heeding rather than an indictment of the model.

How long does IFS therapy usually take?

IFS is not a short-term protocol. Most clients I see for IFS-informed work are dealing with patterns that took years to form, and the work moves at the pace the protective system allows. For a focused presentation, six months to a year of weekly sessions is a reasonable expectation. For complex trauma, the work tends to extend longer, often two to three years or more.

That said, IFS often produces noticeable shifts earlier than the full course of treatment. Many clients describe a felt sense of internal change in the first few months, particularly around the relationship to a specific part, even before the deeper unburdening work has happened. The early gains tend to be in self-understanding and reduced internal conflict; the later gains in actual unburdening of exiles.

In short, IFS is not fast, but the early changes are often substantive.

Frequently Asked Questions

What is IFS therapy?

IFS, or Internal Family Systems therapy, is a non-pathologizing model of psychotherapy developed by Richard Schwartz in the 1980s. It views the mind as a system of distinct parts organized around a core Self. The work focuses on understanding and unburdening parts rather than eliminating symptoms.

Is IFS evidence-based?

IFS was added to SAMHSA's NREPP in 2015 as an evidence-based practice based on a proof-of-concept RCT. A 2025 scoping review of 27 peer-reviewed studies identified IFS as promising for PTSD, depression, and chronic pain. The IFS Institute acknowledges that more large-scale RCTs are still needed for full evidence-based status across specific conditions.

Can IFS therapy be done online?

Yes. Most of my IFS work is done via telehealth, and the model translates well to a secure video format provided the client has a private, regulated environment. I work with clients across New Jersey, Pennsylvania, Florida, and Texas this way. Online IFS sessions are equivalent in clinical depth to in-person.

Is IFS the same as parts therapy?

IFS is a specific model of parts work developed by Richard Schwartz. The broader category of parts therapy includes other approaches such as ego state therapy and voice dialogue. They share the premise that the mind has subpersonalities but differ in technique, structure, and theoretical assumptions about the Self.

Who should not do IFS therapy?

IFS is generally not the first choice for someone in acute crisis, active psychosis, or severe untreated dissociation. In those situations, stabilization and a different therapeutic scaffold are needed first. IFS can be valuable later in treatment, once the system has resources to engage with internal work safely.

How do I find a qualified IFS therapist?

Ask about their specific IFS training: Level 1, Level 2, or Level 3 through the IFS Institute, or formal coursework elsewhere. Ask how they pace parts work and what they do if a client becomes destabilized mid-session. Vague answers about being IFS-informed without specifics warrant follow-up.

Can IFS help with trauma if I can't remember what happened?

Yes. IFS doesn't require detailed memory recall to be clinically useful. The work engages the parts that hold protective and emotional responses to past events, which exist whether or not the memory itself is accessible. Many clients find that working with parts brings clarity without requiring the narrative to be intact.

Is IFS spiritual or religious?

IFS is a psychotherapy model, not a religious or spiritual practice. Some clients describe a felt sense of Self that has spiritual resonance for them, and the model accommodates that, but it doesn't require any religious framework or belief system. It can be practiced from any worldview.