How usual is cheating?

Why Cheating Is More Common in Dating Than Marriage

It might sound surprising, but research suggests that cheating is far more common during dating than in marriage. While societal attention often focuses on affairs within committed marriages, the reality is that romantic infidelity peaks earlier—when people are still navigating casual or serious relationships before tying the knot.

Studies show that between 60% and 70% of individuals admit to some form of cheating or infidelity while dating. This could include emotional connections with others, physical intimacy outside the relationship, or dishonesty about exclusivity. In contrast, only about 20% of married individuals report having an affair during their marriage.

Why the big difference? One explanation lies in the nature of the relationships themselves. Dating phases are often marked by uncertainty, evolving boundaries, and less formal commitment. People may still be figuring out what they want, testing emotional waters, or struggling with communication. All of that can create situations where temptations are harder to resist—or where exclusivity isn’t clearly defined.

Marriage, on the other hand, tends to come with clearer expectations, deeper emotional investment, and often, stronger social or personal accountability. While affairs do happen, the structure and commitment of marriage seem to reduce the overall incidence of cheating compared to earlier, more fluid stages of romance.

Of course, every relationship is different. But the numbers challenge the stereotype that marriage is the high-risk zone for betrayal. In truth, the dating phase may be where trust is tested the most. Understanding this could help couples have more honest conversations earlier on—before expectations and emotions spiral into misunderstandings.