It is a fair question to ask before you commit time and money, and it rarely gets a straight answer. The straight answer is that the published numbers describe structured treatments tested under research conditions, and your situation may not match them.
This article reports those numbers with their sources, explains why therapy sometimes runs longer, and sets out what is known about whether gains last. It covers therapy. Timing for medication is covered in therapy, medication or both for anxiety?
Is there a standard length for anxiety therapy?
No. The American Psychological Association says the length of treatment "will necessarily vary from one individual to another." It also notes that treatments of the cognitive behavioral therapy (CBT) type "are generally briefer than are psychotherapies with a broader focus."
So the answer depends partly on which kind of therapy you choose and partly on what you are dealing with. The kinds are compared in types of anxiety therapy and what the research says.
What do guidelines say about session numbers?
The most specific figures come from NICE, the United Kingdom's guideline body. They describe how care is planned in the UK and are not a U.S. standard. The research for this guide found no U.S. guideline that gives session numbers for anxiety disorders.
- Generalized anxiety disorder. CBT or applied relaxation should usually consist of 12 to 15 weekly sessions of 1 hour, "fewer if the person recovers sooner; more if clinically required." NICE's version for the public describes this as weekly meetings for about 3 to 4 months. Guided self-help, a lighter option, is usually 5 to 7 sessions of 20 to 30 minutes.
- Panic disorder. CBT of 7 to 14 hours in total, usually as weekly sessions of 1 to 2 hours, completed within 4 months at most. Note that the figure is hours, not sessions.
- Social anxiety disorder. Individual CBT of up to 14 sessions of 90 minutes over approximately 4 months in one model, or 15 sessions of 60 minutes plus one of 90 minutes in another. Short-term psychodynamic therapy designed for social anxiety is described as typically up to 25 to 30 sessions of 50 minutes over 6 to 8 months.
These are planning figures for structured treatments of a diagnosed disorder. They are not a forecast for an individual.
How long did treatment last in research trials?
A similar range, because trials fix the length in advance. In a 2009 German trial of 57 patients with generalized anxiety disorder, both CBT and short-term psychodynamic therapy ran for up to 30 weekly sessions. In a 2016 U.S. trial of 201 patients with panic disorder, three treatments each ran for 19 to 24 sessions over 12 weeks.
A trial's length is set by its design. It shows how long the researchers chose to treat people. It does not show how long any one person needed.
Why does therapy take longer for some people?
Because the problem, the goals and the method differ. The American Psychological Association gives some general figures in a 2017 page written by its clinical psychology division. They are about psychological treatment as a whole, not anxiety specifically, and the page cites no studies for them.
- It says recent research indicates that on average 15 to 20 sessions are required for 50 percent of patients to recover, as indicated by self-reported symptom measures.
- Patients and therapists sometimes prefer to continue over longer periods, for example 20 to 30 sessions over six months, "to achieve more complete symptom remission."
- People with co-occurring conditions or certain personality difficulties may require longer treatment, for example 12 to 18 months, for therapy to be effective.
Anxiety can come with something else, such as low mood or the effects of trauma. See anxiety vs. depression and anxiety and trauma. The Association also says that acute difficulties usually require fewer sessions than chronic conditions, and that therapies with a broader focus are generally less brief than cognitive behavioral treatments aimed at a specific problem.
One gap should be stated. The research for this guide found no trial that establishes a typical length for open-ended or long-term psychodynamic therapy for anxiety. Anyone who gives you a firm number for that is estimating.
Do the gains last after therapy ends?
In the studies that measured it, most people did not relapse, and some did. A 2021 meta-analysis of 17 articles covering 337 patients found an overall relapse rate of 14% after CBT for anxiety and related disorders, with no significant difference between diagnoses. A systematic review from the same year, with nine studies and 532 patients treated for anxiety disorders, PTSD or obsessive-compulsive disorder, found that on average 23.8% relapsed after completing CBT.
Both are small bodies of research, and the meta-analysis found that the rate depended on how relapse was defined. A range of about 14% to about 24% is the fairest reading. No therapy comes with a promise that anxiety will not come back.
You may come across the term booster sessions, meaning occasional sessions after treatment has ended. The research for this guide found no evidence for or against them in adult anxiety disorders, so this article makes no claim about them.
How is progress judged along the way?
By checking, together, against what you came for. The American Psychological Association puts the reader's side of it this way: "If you believe there is insufficient progress after a reasonable period of treatment, it is always appropriate to discuss your treatment with another therapist and/or request a re-evaluation of the treatment plan with your therapist to assure that treatment is on track and helpful to you."
It is reasonable to ask at the start how progress will be reviewed and what happens if you are not improving. The practice's guide to signs therapy is working describes what change tends to look like.
How does Dr. Rabin approach length?
Her anxiety page answers the question this way: "It varies. Some people notice meaningful relief within a few months of weekly sessions, while deeper, longer-standing patterns take longer to shift." That is her description of her own practice. It is not a research finding and it is not a promise. Sessions are usually weekly and last 45 to 50 minutes.
Her anxiety therapy is psychodynamic, attachment-based, trauma-informed and mindfulness-based, and looks at what drives the anxiety as well as how to respond to it in the moment. She also offers CBT. You can ask what she would expect in your case on a free consultation of about 15 minutes, requested through the contact page.
Keep reading
Sources
- American Psychological Association, How Long Will It Take for Treatment to Work? (2017)
- NICE, Generalised anxiety disorder and panic disorder in adults: management, CG113, Recommendations (2011, updated 2020)
- NICE, Social anxiety disorder: recognition, assessment and treatment, CG159, Recommendations (2013)
- Leichsenring F et al., Short-term psychodynamic psychotherapy and cognitive-behavioral therapy in generalized anxiety disorder: a randomized, controlled trial, American Journal of Psychiatry (2009)
- Milrod B et al., Psychotherapies for Panic Disorder: A Tale of Two Sites, Journal of Clinical Psychiatry (2016)
- Levy HC, O'Bryan EM, Tolin DF, A meta-analysis of relapse rates in cognitive-behavioral therapy for anxiety disorders, Journal of Anxiety Disorders (2021)
- Lorimer B, Kellett S, Nye A, Delgadillo J, Predictors of relapse and recurrence following cognitive behavioural therapy for anxiety-related disorders: a systematic review, Cognitive Behaviour Therapy (2021)
- NICE, CG113 Information for the public: What treatments should I be offered for GAD? (2011)
- Milrod B et al., A randomized controlled clinical trial of psychoanalytic psychotherapy for panic disorder, American Journal of Psychiatry (2007)
Last reviewed October 2026. This guide is general information, not medical advice or a diagnosis. If you are in crisis, call or text 988, or call 911 in an emergency.
