What Are the Stages of Change in Addiction?

The most widely used framework for understanding how people change addictive behavior describes six stages: precontemplation, contemplation, preparation, action, maintenance, and termination. Known as the Transtheoretical Model, it was developed by psychologists James Prochaska and Carlo DiClemente and has shaped how clinicians, rehab programs, and even digital health tools approach addiction treatment. The model’s core insight is that change is not a single event but a process people move through over time, often in a messy, non-linear way that looks nothing like a clean staircase.

The Six Stages, Explained

Each stage describes a person’s relationship with their substance use and their readiness to do something about it. The stages are not rigid categories with hard borders, but they give clinicians and families a way to understand where someone is mentally and what kind of help is most likely to reach them.

Precontemplation: The person does not see their substance use as a problem, or at least not one that needs changing. They may be unaware of the consequences, or they may be well aware but feel no desire or ability to change. From the outside, this often looks like denial. They are not planning to take action in the foreseeable future.
Contemplation: The person recognizes that their substance use is causing harm and is thinking about changing, but has not committed to doing anything yet. This stage is marked by ambivalence. They can see both the costs of continuing and the costs of quitting, and they weigh the two without resolving the tension. People can stay here for months or years.
Preparation: The person intends to take action soon and may already be taking small steps. They might call a treatment center, tell a friend they want to quit, cut down slightly, or set a quit date. The commitment is forming but has not yet turned into sustained behavioral change.
Action: The person has made a clear, observable change in their behavior. They have stopped or substantially reduced their substance use and are actively working to maintain that change. This stage typically covers the first six months of changed behavior, when the effort is most conscious and the risk of reversal is highest.
Maintenance: The person has sustained the behavioral change for more than six months and is working to prevent relapse. The change requires less active effort than during the action stage, but vigilance is still necessary. Confidence grows over time, but triggers and cravings can persist.
Termination: The person has zero temptation to return to the substance and complete confidence in their ability to stay abstinent regardless of the situation. This stage is considered the endpoint, though many addiction researchers question whether it is realistically achievable for most people with substance use disorders. In practice, many people remain in maintenance indefinitely rather than reaching termination.

Where Most People Actually Are

One of the most practical takeaways from this model is that the majority of people with a substance use problem are not in the action stage. Research on at-risk populations has produced a rough rule of thumb: about 40% are in precontemplation, another 40% are in contemplation, and only about 20% are in the preparation stage.¹ That means the vast majority of people who need help are not yet ready to take action, a reality that traditional treatment programs, which tend to be designed for people already motivated to change, have historically struggled to address.

A recent community study of people who inject drugs in Los Angeles found a strikingly similar distribution: about half were in precontemplation, roughly a third in contemplation, and one in five in preparation.² The qualitative interviews in that study highlighted what kept people stuck: lack of social support, the difficulty of breaking deeply ingrained substance-use routines, and environmental barriers like housing instability.

Change Is Rarely a Straight Line

The numbered list of stages creates an impression of orderly, forward progress. The reality is far messier. People skip stages, move backward, circle through the same stages multiple times, and often experience relapse as a recurring feature of the process rather than a failure of it. Prochaska and DiClemente originally described the model as a spiral rather than a line, with most people cycling through the stages several times before achieving lasting change.

Relapse, in this framework, is not a separate stage but a common event that sends someone back to an earlier stage, most often contemplation or precontemplation. A person who had six months of sobriety and then starts using again does not go back to zero in a meaningful psychological sense. They carry the knowledge, skills, and partial self-awareness they developed during their time in action and maintenance, which often means their next attempt is more informed and, in many cases, more successful than the last one.

This cycling pattern is part of why the model has been so influential in clinical settings: it normalizes setbacks and gives both the person and their treatment provider a way to understand relapse without treating it as catastrophic. When someone returns to an earlier stage, the clinical question becomes “What does this person need now to move forward again?” rather than “Why did treatment fail?”

What Pushes Someone from One Stage to the Next

Understanding the stages is useful, but the question most people actually have is: what makes someone move? The model identifies two broad categories of forces that drive stage transitions. Experiential processes operate mostly through awareness and emotion. They include things like learning new information about the health consequences of drug use, feeling genuine distress about the impact on relationships, or seeing someone else’s life improve after getting sober. These tend to be most important in the earlier stages, when the person is still forming their motivation.

Behavioral processes are more concrete and action-oriented: finding new social circles, removing substances from the home, using substitution strategies, or seeking professional treatment. These become more important in the action and maintenance stages, when the person has decided to change and needs practical tools to follow through.

Research on adolescent smokers found that attitudes toward the behavior and the ability to resist urges were associated with movement between stages, suggesting that how a person weighs the pros and cons of their habit and how confident they feel about resisting it are among the strongest predictors of forward progress.³ In the Los Angeles study of people who inject drugs, experiencing symptoms of a serious medical complication like infective endocarditis was significantly associated with being in the contemplation or preparation stages, as was using a particularly dangerous drug combination daily.² In other words, health scares and escalating consequences can act as catalysts that shift people from “I don’t have a problem” to “maybe I do.”

What Happens in the Brain

The stages of change are not just psychological labels. There is growing evidence that a person’s readiness to change has measurable brain correlates. In one neuroimaging study of people with alcohol use disorder, those in the precontemplation or contemplation stages had lower gray matter volume across multiple brain regions compared to both healthy controls and people with the same disorder who had moved into the action stage.⁴ The affected regions included areas involved in self-awareness, decision-making, and emotional processing.

A separate study of people with methamphetamine use disorder found that higher precontemplation scores were linked to weaker connections between brain areas responsible for emotional regulation and impulse control. The same study found that people deeper in precontemplation also performed worse on cognitive tests.⁴ These findings support the idea that the inability to recognize a problem may not be stubbornness or willful denial. It may partly reflect real cognitive deficits caused by the substance use itself, creating a cruel loop in which the drug impairs the very brain functions a person would need to recognize they should stop using it.

On the hopeful side, the brain appears to recover as people move through treatment. A study of people with heroin use disorder undergoing inpatient treatment found that white matter pathways in the frontal brain regions showed measurable normalization during treatment. These changes occurred in areas involved in emotional regulation and executive control, and they correlated with reductions in craving.⁵ The brain, in other words, does not just passively follow the decision to change. It physically reorganizes as recovery progresses.

Matching Help to the Right Stage

One of the model’s most practical applications is the idea that different stages call for different kinds of help. Confronting someone in precontemplation with the same tools you would use for someone in action is not just ineffective; it can backfire, making the person more defensive and less likely to move forward.

For people in precontemplation and contemplation, motivational interviewing has become the dominant therapeutic approach. Rather than telling people what to do, it uses open-ended questions and reflective listening to help them explore their own ambivalence. A large Cochrane review of motivational interviewing for substance use found that it had a meaningful effect on substance use compared to no treatment at all, with the strongest results immediately after the intervention and smaller but still present effects at short and medium follow-up.⁶ The effect faded over longer follow-up periods, which suggests motivational interviewing may be most powerful as a catalyst that gets people moving rather than as a standalone long-term treatment.

Stage matters for treatment retention, too. A study of adolescents admitted to an inpatient program found that those in the precontemplation stage were dramatically more likely to drop out. The precontemplation subscale was the single strongest predictor of treatment attrition, with those in precontemplation roughly four times more likely to leave treatment early.⁷ This finding highlights a systemic mismatch: many treatment programs are built for people in the action stage, but a significant portion of people who enter treatment, whether by court order, family pressure, or circumstance, are still in precontemplation. If the program does not meet them where they are, they leave.

What Families Can Do

For people who have a loved one struggling with addiction, the stages-of-change framework reframes the situation in a useful way. If your family member is in precontemplation, arguments about the damage they are doing are unlikely to land. They are not being obstinate for the sake of it; they genuinely do not see the situation the way you do, and the neuroscience suggests their brain may be working against that recognition.

An approach called Community Reinforcement and Family Training, or CRAFT, was designed specifically for family members of people who are not yet willing to seek help. In a randomized trial, about 62% of the people whose family members received CRAFT training entered treatment, compared to 37% of those whose family members received a more traditional intervention.⁸ CRAFT teaches family members to use positive reinforcement, improve their own well-being, and create natural consequences for substance use without confrontation or ultimatums. The model essentially helps families become catalysts for stage progression without trying to force someone from precontemplation directly into action.

Digital Tools and Self-Guided Approaches

The stages-of-change framework has increasingly been built into digital health tools. Apps and web-based platforms can tailor content to a person’s current stage, delivering psychoeducation and self-reflection prompts during precontemplation and contemplation, then switching to skill-building exercises and relapse-prevention strategies during action and maintenance.

A study of a Therapeutic Education System (a web-based psychosocial intervention used alongside standard treatment) found that participants who used it had about a 28% lower rate of treatment dropout and were more likely to achieve abstinence. The benefit was especially strong for people who tested positive for substances at the start of the study, suggesting the tool was particularly effective for people at higher risk.⁹ Digital interventions do not replace human connection, but they can fill gaps between appointments, reach people in rural areas, and provide support during the vulnerable hours when cravings peak and no therapist is available.

Measuring Where Someone Is

If the stages are going to guide treatment decisions, clinicians need reliable ways to assess which stage a person is in. Several validated questionnaires exist for this purpose. The University of Rhode Island Change Assessment, or URICA, is one of the most widely used. It measures four subscales corresponding to precontemplation, contemplation, action, and maintenance and can be combined into a single readiness-to-change score.

Another tool, the Stages of Change Readiness and Treatment Eagerness Scale (SOCRATES), focuses specifically on substance use. In a study of Latino adolescents in treatment, the “taking steps” subscale of the SOCRATES significantly predicted lower substance use after treatment, suggesting that the simple act of measuring someone’s behavioral engagement can identify who is most likely to improve.¹⁰ These tools are not perfect, and some critics argue they impose artificial categories on what is really a continuous spectrum of readiness. But they give treatment providers something concrete to work with, which is better than guessing.

Where the Model Falls Short

The stages-of-change model is ubiquitous in addiction treatment, but it is not without serious criticism. One foundational concern is that the evidence for the model as applied to substance use is thinner than its popularity would suggest. A review of applications of the model to alcohol and drug use concluded that the supporting evidence was “meagre and inconsistent.”¹¹

A separate critique raised a more structural concern: the proposed stages may not be truly distinct from one another, and there is limited evidence that people actually move through them in a sequential fashion.¹² In other words, the clean stage labels may be imposing more order on the process than really exists. A person can simultaneously hold beliefs consistent with contemplation (recognizing the problem) and precontemplation (not wanting to change), making it hard to assign them to one stage in a meaningful way.

Some researchers also point out that the model places most of the explanatory weight on individual motivation and psychological readiness, which can underestimate the role of environmental factors. Housing, employment, access to healthcare, proximity to drug markets, and the behavior of the people around you all powerfully shape whether someone moves forward or stays stuck. The Los Angeles study found that receiving public financial assistance was significantly associated with being in the preparation stage, hinting that even modest material stability can shift a person’s readiness.² A model focused on internal readiness can inadvertently blame people for not being “ready enough” when the real barriers are external.

None of this means the model is useless. It remains one of the few frameworks that explicitly accounts for the fact that most people with substance problems are not ready for action-oriented treatment. It gave clinicians a vocabulary for meeting people where they are, and it helped shift addiction treatment away from a punitive “you have to want it” philosophy toward a more compassionate, process-oriented approach. But it works best as a rough map rather than a precise GPS, a way to orient yourself rather than a set of coordinates you can follow blindly.

Why the Precontemplation Problem Is the Hardest One

If you step back and look at the full landscape, the most stubborn challenge in addiction treatment is not getting someone from action to maintenance. It is getting someone out of precontemplation in the first place. That initial shift, from “I don’t have a problem” to “maybe I do,” involves changes in self-awareness and brain function that are not easily produced by external pressure. The neuroimaging evidence suggests that the cognitive deficits associated with precontemplation are real and measurable, not just psychological resistance.⁴

This is where the stages-of-change model has perhaps its most valuable practical implication. It tells treatment systems, families, and policymakers to stop designing interventions exclusively for the 20% who are already preparing to change and start investing in approaches that can reach the 80% who are not. Motivational interviewing, family-based programs like CRAFT, harm-reduction services that keep people alive and connected while they are still in precontemplation, and digital tools that can deliver stage-appropriate content on demand all represent steps in that direction. The model’s greatest contribution may not be the stages themselves but the reframing they encourage: addiction recovery is not something that starts when a person walks through the doors of a treatment center. It starts much earlier, in the slow, invisible shifts that happen when someone begins to wonder whether things could be different.