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How to share income after marriage and kids?
Now I have been trying to figure out how to split the money that we both earn. From what I can see there are several concepts but none of them really seems ideal to me. There is nothing fair or unfair in such arrangements. It is what you both agree. You can try and make this as scientific as possible. But then there is no golden rule.  For example, your girlfriend makes 2200 now and due to child, she is making 1100. The child is both of your responsibility; so you need to compensate half of her salary loss. 550 and she takes the other half. If you hire a nanny to look after you kinds, it would say cost you 500. But your girlfriend is doing that job, so she should get additional 500 from common pot. Plus due to loss of few years in looking after the children, she has a lost opportunity in career growth. i.e. she may indefinitely make less money than she can... So one gets into all kinds of theories and analysis and any arrangements will have some or the other gaps.  So my suggestion, don't get too scientific about it. Just talk it out as to what you both feel how this should be and arrive it. It is something every individual has to agree. It also make sense to have the large assets [or assets that matter], like house, car etc in clear title and who gets what in case you decide to separate. Other should be incidental.