Why do people say “I told you so” during conflict?

Usually it’s less about being factually correct and more about wanting acknowledgment — feeling dismissed earlier and using the moment to reclaim being right, respected, or heard.

Does saying “I told you so” damage a relationship?

It can, especially if it’s used repeatedly — it tends to make the other person feel judged rather than supported, which shuts down open communication instead of building it.

What can you say instead of “I told you so”?

Something that acknowledges the outcome without scoring points — focusing on how to move forward together rather than re-litigating who was right.