Group vs Individual Therapy for Anxiety: What the Comparisons Show

If you’re looking for anxiety treatment, you may be offered a choice between individual and group therapy — or, in many public services, group may be the only option available. Understanding what the evidence says about both formats helps you make an informed decision.

What the evidence shows

A systematic review and meta-analysis of group psychotherapy for anxiety disorders found that group therapy was effective compared with control conditions, with moderate-to-large effect sizes [1]. The majority of the evidence is for group CBT specifically.

Direct comparisons between group and individual therapy are less common than you might expect. Most trials test one format against a waiting list or treatment as usual, not against the other format. When direct comparisons exist, the results generally show:

• Similar outcomes for group and individual CBT, particularly for social anxiety [3]
• Some studies suggesting slightly larger effects for individual therapy, particularly for more severe or complex presentations
• No consistent, statistically significant advantage for either format across anxiety disorders

A landmark trial of group CBT for social phobia found it effective and comparable to medication (phenelzine) [6]. This established group CBT as a viable treatment specifically for social anxiety, where it remains a standard approach.

Potential advantages of each format

Individual therapy

• Personalization. Treatment can be tailored to the person’s specific fears, avoidance patterns and cognitive distortions
• Pacing. The therapist adjusts pace based on individual progress rather than group schedule
• Privacy. Some people are more willing to disclose sensitive concerns one-to-one
• Flexibility. Scheduling is typically easier

Group therapy

• Normalization. Discovering that others share similar struggles reduces shame and isolation
• Social learning. Observing others challenge their anxiety can be powerful
• Built-in exposure. For social anxiety, the group is itself a social situation requiring the skills being taught
• Cost-effectiveness. One therapist treats multiple people simultaneously
• Peer support. Mutual encouragement and accountability

The social anxiety advantage is worth noting. In individual therapy for social anxiety, exposure to social situations must be arranged. In group therapy, the therapy session itself is an exposure opportunity — speaking in front of others, being evaluated, making mistakes publicly [2].

The cost-effectiveness question

Group therapy is substantially cheaper to deliver per patient. A therapist delivering group CBT to 8 people provides roughly the same number of therapy hours in one-eighth the therapist time. For healthcare systems with limited resources, this is a significant consideration.

However, a critical analysis of the cost-effectiveness evidence noted that simply being cheaper doesn’t mean better value if outcomes are even slightly worse, because the calculation depends on how you value the difference [5]. If individual therapy is 10% more effective and three times more expensive, whether group is more “cost-effective” depends on what threshold of effectiveness you consider acceptable.

Practical considerations the trials don’t capture

Scheduling. Groups run at fixed times, often weekly for 10–16 weeks. Missing a session means missing content that can’t easily be made up. Individual therapy is more schedulable.

Group composition. The therapeutic impact of a group depends on its members. A group where everyone feels safe to share is very different from one where some members dominate or where severity varies widely.

Waiting. In public services, group therapy often requires waiting for a group to fill, adding weeks or months to the start of treatment.

Dropout. Some evidence suggests slightly higher dropout from group formats, but this varies. Social anxiety ironically makes it harder to attend the treatment designed for it.

Questions to ask when choosing

1. Is the group using a structured, evidence-based protocol?
2. What anxiety disorders is the group designed for?
3. How large is the group, and who screens participants?
4. Is there an option to switch to individual therapy if the group isn’t working?
5. How does the group handle missed sessions?

What remains uncertain

Whether specific anxiety disorders respond differently to group versus individual formats needs more direct comparisons. Whether combining formats (group treatment followed by individual sessions, or vice versa) adds value is barely studied. Whether online group therapy works as well as in-person groups is an emerging question with very limited evidence. And whether the therapist effects that matter in individual therapy operate differently in groups is largely unexplored.

Choosing between formats. Both group and individual CBT have evidence for anxiety disorders. If you have a strong preference for one, that preference matters — you’re more likely to engage with treatment you’re willing to attend. If anxiety is affecting your daily life, talk to a GP or mental health professional. If you are in crisis or thinking about harming yourself, contact emergency services or a crisis line now: in the US, call or text 988; in the UK and Ireland, Samaritans on 116 123.