I (35F) have been with my partner (37M) for 10 years. We are DINK. A couple of years ago, we moved to a new, much more expensive state. Since I earn more, we agreed that we would both contribute to our joint account in a way that allowed us to save equally — meaning I pay about $1.5k more per month than he does. We basically live out of the joint account for all expenses.

This year, we both received some bonuses from work. Mine was about three times larger than his. Now, he wants us to combine our bonuses, split them equally into three parts: one for each of us personally, and one part to go into the joint account.

I don't agree with this. I feel like bonuses are different from regular salary and should be treated separately. Plus, when we made the original agreement about contributing more, it was about regular income and monthly expenses — bonuses were never mentioned.

He says that combining bonuses was part of the spirit of our agreement when moving to a more expensive area and that I'm being unfair. He’s pretty upset and sulking about it.

So... AITA for thinking bonuses should be treated differently and not wanting to share them at all.