Why can't I take credit for my own work?

The short answerDeflecting credit can feel like humility, but often it's a way to stay safe: if you never claim the win, no one can call you arrogant or expect it of you again. The cost is that your work goes invisible, including to yourself. Owning a contribution is a skill, and it starts with one plain sentence of thanks said without a single word of walk-back.

Why this happens

Deflecting praise can look like modesty, but underneath it's often protection. If you never claim a win, no one can accuse you of arrogance, and no one can expect you to repeat it. Sharing credit that's genuinely yours, changing the subject, adding a quick it-was-nothing, all keep you safely small.

The cost is that your contribution disappears, and over-humility can actually read to other people as low value. If you keep telling a room your work was nothing, some of them will believe you.

What actually helps

Owning a contribution is a skill you can practice, and it starts with letting a plain thank-you stand on its own. You don't have to boast. You just have to stop taking it back.

Say thank you, and resist the urge to add a disclaimer.
State your part factually, without inflating it or shrinking it.
Notice the pull to say it was really someone else, and let the record stand.

A small experiment

The next time someone praises your work, say thank you, I worked hard on that, and then stop. Feel the pull to soften it or hand it off, and this once, do not.