How Long Does
EMDR Therapy Take?
A Realistic Guide

The honest answer is:
it depends, and here is why

The duration of EMDR therapy varies considerably from person to person, and anyone who gives you a definitive session count before conducting a thorough assessment is not being fully honest. What can be said with confidence is that certain factors consistently predict whether treatment will be briefer or more extended — and understanding these factors will help you form a realistic picture of what to expect.

The single most important factor is the nature and extent of what is being treated. A single traumatic event in an otherwise well-resourced adult is a fundamentally different clinical picture from decades of complex, developmental trauma beginning in early childhood. These two presentations may both be treated with EMDR therapy, but they will require very different amounts of time.

What the research says about
session numbers

For single-incident PTSD, the research is encouraging. Multiple randomised controlled trials have shown that a significant proportion of participants no longer meet diagnostic criteria for PTSD after as few as three to six sessions of EMDR therapy. Several studies have found that EMDR therapy achieves these outcomes in fewer sessions than trauma-focused CBT, though both treatments produce equivalent endpoints.

For complex PTSD — characterised by prolonged, repeated trauma, typically of an interpersonal nature beginning in childhood — the picture is different. Research and clinical experience both indicate that treatment typically spans many months. This is not a failure of the therapy; it reflects the depth and breadth of what needs to be addressed, and the time required to build the stability and resources that make processing possible and safe.

It is also worth noting that research studies tend to focus on specific diagnoses with defined inclusion criteria, whereas real-world clinical presentations are often more complex and multifaceted. Your therapist will give you a more specific and individualised estimate after the initial assessment.

Why the preparation phase
is not wasted time

One of the most common misunderstandings about EMDR therapy is the assumption that the preparation phase — the sessions before memory processing begins — is preliminary and unimportant, a hurdle to clear before the real work starts. This misunderstands both what the preparation phase involves and why it is clinically essential.

The preparation phase establishes the foundation that makes safe processing possible. It involves developing grounding and stabilisation skills that allow the person to manage difficult emotions without becoming overwhelmed; building the capacity to move in and out of distressing material without losing their footing; and developing the therapeutic relationship to a level of trust that supports the vulnerability required by processing work.

For people with complex histories or limited emotional regulation capacity, this foundation-building is not optional — skipping it risks destabilisation rather than resolution. And the skills developed during preparation are not discarded once processing begins. They continue to be used between sessions and contribute to the durability of change over time.

Many people also report significant improvements in their daily functioning during the preparation phase itself — not because traumatic memories have been reprocessed, but because the stabilisation work reduces the overall level of nervous system activation they are carrying.

Factors that influence
treatment length

Beyond the type of trauma, several other factors influence how long treatment takes:

• Number of memory targets. Each distinct experience that needs to be addressed represents a target. Complex presentations may involve many interconnected targets across different developmental periods.
• Current life stability. Ongoing stressors — relationship difficulties, work pressure, housing instability — can slow processing and require attention in their own right.
• Existing resources. People with strong social support, good physical health, and established coping strategies generally move through treatment faster than those without.
• Dissociation. Significant dissociative symptoms require careful specialist management and typically extend the preparation phase substantially.
• Session frequency. Weekly sessions generally produce faster progress than fortnightly sessions, though the right frequency depends on the individual’s capacity to integrate processing between appointments.
• Between-session processing. EMDR therapy often continues to work between sessions. Dreams, realisations, and emotional shifts between appointments are common and are part of how the treatment works.

How will I know when
treatment is complete?

Treatment is not simply a fixed number of sessions. It is complete when the goals that brought the person to therapy have been achieved: when the memories that were distressing can be recalled without being overwhelmed, when present-day triggers no longer activate the old alarm response, and when the person has a stable and compassionate relationship with their own history.

Your therapist will re-evaluate progress at regular intervals throughout treatment and will discuss with you when it makes clinical sense to begin reducing the frequency of sessions and, eventually, to bring the treatment to a planned close. The aim is not dependence on therapy but the development of sufficient internal resources that ongoing support is no longer necessary.

The cost of waiting
versus the cost of treatment

One of the most common reasons people delay seeking treatment is concern about cost and time commitment. These are legitimate considerations and deserve a direct response.

The cost of untreated trauma, measured in reduced quality of life, relationship difficulties, impaired work performance, and the downstream effects on physical health, is substantial and accumulates over years. A course of effective treatment, even an extended one, often represents a meaningful improvement in these outcomes over the long term. Many people reflect, having completed treatment, that they wish they had begun sooner.

At the EMDR Therapy Clinic, sessions are $260 per appointment in-person and $230 online. A realistic treatment plan, including expected duration, will be discussed following the initial assessment so that you can make an informed decision with full information.