One of the more common questions we get from potential new clients is some version of “How long will this take?” It’s a reasonable question; people want to feel better soon, and therapy is an investment in time and resources. Thankfully, relief begins to happen quickly in therapy, though there is work to do to make sure those gains solidify. Here’s an overview of the research on two of the main forms of therapy we practice at Dallas CBT: CBT and ACT.
What the Evidence Tells Us About CBT
Most research suggests that an appropriate “dose” of treatment is around 20 sessions, spread out over a several month period. Clients often experience some relief in the first 3 sessions or so as they name their struggles and learn more about how their symptoms are created or maintained After about 6 to 10 sessions, clients show more measurable decreases in symptoms and improvements in functioning as they are becoming more consistent with their therapy skills. Once we get into the 12 to 20 session range, research shows medium to large effect sizes across a host of disorders. At this latter stage in treatment clients are solidifying their gains and preparing to manage symptoms on their own. This leads to robust and sustained treatment gains well after treatment is discontinued.
Why Progress Speeds Up or Slows Down
Several factors influence the pace of improvement:
- Severity and complexity: Though it makes intuitive sense, research indicates that less severe and complex symptoms tend to respond more swiftly to treatment, while more severe and complex symptoms require more time and consistent work, even beyond 20 sessions
- Client engagement & Skills Practice: Therapy can help lead the proverbial horse to water, but it cannot make it drink. Consistently, the biggest predictor of treatment gains is how consistently the client engages in their therapy work between sessions.
- Therapeutic alliance: The quality of the relationship between therapist and client consistently predicts outcomes in treatment.
- Life context: Life stressors rarely stop and wait for us to engage in treatment, and often directly contribute to more of whatever it is we’re struggling with. This doesn’t mean treatment gains are unreachable while going through major life stressors, but they are often slow it down.
What About ACT?
Acceptance and Commitment Therapy (ACT) is a form of CBT that isn’t focused on symptom reduction alone—it’s about increasing psychological flexibility and taking valued action despite symptoms you’re experiencing. Research shows ACT to be effective across many disorders, with over 1,300 RCTs and multiple meta-analyses affirming its efficacy.
In clinical practice, clients often observe early shifts in the first few weeks of treatment—like greater openness to anxiety or a small return to meaningful activity. That said, deeper shifts—like living with less experiential avoidance—often become clearer over 8 to 16 sessions, depending on individual context. Clients often experience progress in waves, with large shifts in their experience of their symptoms coming after weeks of consistent practice.
Therapy is a Process
Therapy isn’t a quick fix—but CBT and ACT are not open-ended guesswork. Evidence shows that structured treatments like CBT and ACT can yield lasting change and that the effort put in predicts the outcome. CBT delivers tangible tools; ACT fosters flexible living in the face of anxiety. When paired with a supportive therapist, real relief isn’t just hoped for—it’s within reach.
If you are ready to give therapy a try with a compassionate specialist in anxiety, the therapists at Dallas CBT would be honored to be on this journey with you. Reach out to our office to paired with the therapist who is the best fit for you.