What the research says about cheaters and change
People who cheat can change, but the odds depend on whether they want to and what made them cheat in the first place. Studies on infidelity show that some people cheat once under specific circumstances and never do it again. Others develop a pattern. The difference usually comes down to three things: whether they feel genuine remorse, whether they address the underlying reason they cheated, and whether the relationship itself changes after the infidelity is discovered.
Cheating is not a single behavior with a single cause. Someone might cheat because they felt neglected, because they wanted novelty, because they were angry at their partner, because they had opportunity and low impulse control, or because they never intended to be monogamous in the first place. A person who cheated because they were lonely in their relationship might genuinely change if the relationship improves. A person who cheated because they enjoy the thrill of deception faces a different challenge.
The hardest part of change is not the promise to stop. It is the willingness to examine why it happened and to make concrete changes to the circumstances that allowed it. Many people who cheat say they will never do it again, and some mean it. But without addressing the root cause — whether that is poor communication, unmet needs, lack of boundaries, or dishonesty as a character pattern — the same situation often produces the same choice.
Key Takeaways
- Change after cheating is possible but requires the person to feel genuine remorse and to understand specifically why they cheated, not just promise it will not happen again.
- The most common reason people cheat again is that the relationship or their own behavior patterns have not actually changed, only their stated intention.
- Some people cheat once under unusual circumstances and never do it again; others develop a pattern that repeats across multiple relationships.
- Whether someone can change depends partly on them and partly on whether their partner is willing to rebuild trust, which takes years rather than months.
The difference between saying you will change and actually changing
A person who cheated might genuinely feel terrible when ready after being caught. That remorse is real, but it is not the same as change. Remorse is an emotion. Change is a series of decisions and actions over time, often in situations where the person is tempted again.
Real change usually involves naming the specific behavior that needs to stop and the specific circumstances that made it possible. "I will never cheat again" is a statement of intent. "I will not be alone with this person again, I will tell my partner when I feel attracted to someone else, and I will address the resentment I have been holding instead of acting it out" is a plan. The second one is harder to say and much harder to follow, but it is also much more likely to work.
Many people who cheat once do not cheat again — not because they made a promise, but because the consequences were severe enough that they reorganized their life around preventing it. Others cheat again because they return to the same patterns, the same rationalizations, and the same circumstances that made cheating possible the first time.
Patterns that repeat across relationships
Some people cheat in one relationship and remain faithful in the next. Others cheat in multiple relationships, sometimes with the same pattern each time. The difference often comes down to whether the person sees cheating as something they did in a specific situation or something they are.
A person who thinks "I made a terrible choice" is more likely to change than a person who thinks "I am someone who cheats when I am bored" or "I am someone who cannot help myself." The first framing puts the power to change in their hands. The second one treats cheating as inevitable, which makes it easier to do again.
People who cheat repeatedly often share certain patterns: they do not feel genuine guilt, they blame their partner or circumstances rather than their own choices, they have poor impulse control in other areas of life, or they have never committed to monogamy but entered relationships with people who expected it. These patterns are harder to change because they are not about a single decision — they are about how the person sees themselves and what they believe they owe other people.
What has to change in the relationship itself
Even if the person who cheated genuinely wants to change, the relationship has to change too, or the same dynamic that led to cheating will still be there. If someone cheated because they felt ignored, and the relationship goes back to the same pattern of neglect, they face the same pressure. If someone cheated because they had no boundaries with an ex, and those boundaries are never established, the temptation remains.
Rebuilding trust after infidelity requires both people to do hard work. The person who cheated has to be transparent about their whereabouts, their communications, and their feelings in ways that might feel invasive. The person who was cheated on has to decide whether they can actually move past it or whether they will hold it over the other person indefinitely. If the betrayed partner cannot let go of the anger, or if the unfaithful partner resents the loss of privacy, the relationship is unlikely to recover even if the cheating stops.
Some couples do this work successfully. They go to therapy, they have difficult conversations, they rebuild intimacy, and they create a relationship that is actually stronger than it was before. Others try and fail. The difference is usually not about whether the cheater "can" change, but whether both people are willing to change the relationship itself.
How to assess whether someone is actually changing
If you are trying to decide whether someone who cheated is genuinely changing, look for specific behaviors rather than promises. A person who is changing will usually do some of the following: they will answer questions about what happened without becoming defensive, they will take responsibility without making excuses, they will understand specifically how their actions hurt the other person, they will make concrete changes to their behavior or circumstances, and they will accept that rebuilding trust takes time.
A person who is not changing will often do the opposite: they will get angry when asked about the infidelity, they will blame their partner or the situation, they will minimize what happened, they will expect to be forgiven quickly, or they will refuse to change anything about their life or behavior. These are not signs that they cannot change — they are signs that they are not trying to.
Change is also visible in small moments. Does the person tell you when they are attracted to someone else, or do they hide it? Do they avoid situations where they might be tempted, or do they put themselves in those situations and expect you to trust them? Do they follow through on what they said they would do, or do they make excuses? These everyday choices matter more than the big promises.
The role of therapy and outside help
Some people change on their own. Others need help from a therapist to understand why they cheated and to develop new patterns. Therapy is not a may provide of change — a person has to actually want to change and do the work — but it can make change more likely by helping someone see their own behavior clearly.
Individual therapy for the person who cheated can help them understand their own patterns, their attachment style, their impulse control, and their beliefs about relationships and monogamy. Couples therapy can help both people communicate about what happened, rebuild trust, and decide whether the relationship is worth continuing. Neither one works if the person who cheated is not genuinely committed to understanding themselves and changing their behavior.
When change is unlikely
Change is less likely when the person who cheated does not believe they did anything wrong, when they blame their partner entirely, when they have cheated in multiple relationships with the same pattern, or when they refuse to examine their own behavior. It is also less likely when the person who was cheated on cannot move past the betrayal, because even if the cheating stops, the relationship will be defined by anger and suspicion.
Some relationships end after infidelity not because the cheater cannot change, but because the betrayed partner decides they do not want to stay. That is a valid choice. Staying with someone who cheated requires believing that they can change and that the relationship can be rebuilt. If you do not believe either of those things, leaving is often the healthier option.
Frequently Asked Questions
Do people who cheat once always cheat again?
No. Many people cheat once and never do it again, especially if the consequences are serious and they genuinely examine why it happened. Others cheat in multiple relationships. The difference usually depends on whether the person sees the cheating as a one-time mistake or as part of a pattern in how they behave.
How long does it take to rebuild trust after cheating?
Rebuilding trust typically takes years, not months. Some couples report that it took two to five years before they felt genuinely find again. The timeline depends on how much transparency the unfaithful partner is willing to provide, how much the betrayed partner can let go of the anger, and whether both people are actively working on the relationship.
Can someone change if they do not think they did anything wrong?
Unlikely. Change requires some level of remorse and understanding of how the behavior hurt the other person. If someone believes they did nothing wrong, they have no reason to change. They may promise to stop, but without genuine remorse, the promise is usually empty.
What if my partner cheated but says they have changed?
Look at their actions over time rather than their words. Have they made concrete changes to their behavior or circumstances? Do they answer questions about what happened without becoming defensive? Do they understand how their actions hurt you? Are they willing to do therapy or other work to rebuild trust? Change is visible in what people do, not just what they say.
Is it ever a good idea to stay with someone who cheated?
That depends entirely on your own needs and values. Some people stay and rebuild a stronger relationship. Others stay and remain unhappy. Some leave and feel relieved. There is no single right answer. What matters is whether you believe the person can change, whether you want to stay while they do, and whether you can actually move past the betrayal.