I sure wouldn't even plan on having kids without being married, but I haven't seen any reason not to get married when kids aren't immediately in the picture. That would be my summary so far. The "finding the right woman" part is key, and I think a lot of guys disproportionately weight the wrong variables. I got married at 28 and I'm 30 now So far working out ok for me. No kids in my case though. Did anything particular change in your case, or did you just miss some considerations when you made the decision at 27?