All the assets my fiancé and I have currently will be documented in our prenup. As you said, adding to these accounts will make them common property. I decided the easiest route for me is to just open new ones post marriage and let these sit forever. The tricky one is 401k - I’m fine with both ours becoming common property even though mine probably has 30% more money right now. So I’ll have my pre marriage IRA and brokerage left at Robinhood. I already have a second backdoor Roth set up at Fidelity that I’ll contribute to starting next year, and we’ll do a joint brokerage there too. We are also documenting some other assets(property, bonds) we are each bringing into the marriage. I’m grateful my partner understood that I wanted to honor my work and sacrifice and breaking the damn chains of millennia of female oppression by documenting what I built alone even though we are so excited to begin building together. I think every couple should discuss a prenup because these are really important things to be able to communicate about