There is no right answer to this! But let me try to paint it clearer for the others to understand. 1) 50-50 - Both parties contribute same amount every month I think while this sounds logical, may not be sustainable eg some couples sometimes may have different earning power, but the kids are both their responsibilities. 2) Go by % of income - Both parties contribute same % of their income every month This one seems pretty modern and also the most utalitatian (fair) way to do it. But also need to have common understanding on both sides that by both increasing income, it helps the overall situation. In fact, I think this could work by creating a seperate savings account (eg CIMB Fastsaver at 1% p.a) joint account to withdraw from here. A shared expense - their kids. 3) 100% from Man of the Household I think this way is not the modern way to do it, used to see other families and my mum sharing from some of her colleages that if the wife stays home, that is where she gets a allowance + family maintainence that she will have to budget for groceries and kids etc. 4) Maintain individual savings account I think this may also result in miscommunications which is not so ideal in a long relationship. Money often is the core of most relationship problems. 5) Paying for certain activities (or by respective kid). MY WAY This example is the one my parents used to raise us up. Both are working adults and worked hard to provide for my brother and I. - For tuition, enrichment classes, presents, gifts rewards (for me and my bro) - My Mum covered these - For groceries, petrol, ultilities, and bills - My dad will cover all these So far, we've grown up well, and my family has a strong sense of financial independence and know-how imparting good money values to us as well. So I guess this kinda worked? At the end of the day, find your own way and stick with it!