N.
I'm sure there are exceptions to every rule, but every married couple I have ever personally known who keep their finances separate have ended up separate.
My husband and I have always combined our incomes into one checking account and pay all bills from that account. I used to make a lot more money than he did and now he makes more than me, but we never divided expenses based on how much we make.
Early in our marriage, we went to a marriage counselor for many different issues, not just finances, but regarding finances our counselor said that she and her husband had 3 checking accounts. One joint and one for each of them for their own personal things. They divided the money equally though. Not based on who made more. So they combined the money, put enough in the joint account to take care of all household and other daily expenses and then had an "allowance" they each put in their own accounts to do with what they wanted. We've really not done anything like that 'cause we've never had any issues with one spouse spending on things the other disagrees with.
I am of the belief that once we are married, his income is my money and mine is his and there is no separation between the two. Part of being married is negotiating and compromising about what we spend our money on. If we can't agree, maybe we weren't compatible enough to get married to begin with. Probably a minority view, I know, but that's how we handle our finances.
Good luck!