the key is communication and understanding.

husband and wife need to sit together and lay a plan:



if they want to open a joint checking or saving account or retain individual accounts or both.
(there are advantages and disadvantages)

how much are they going to contribute for groceries, rent and anything they both share.

how much is going on saving account and/or IRA and/or emergency fund.

how much is going for individual expenses

there could be more but these are all i can think of

I think if all of these are addressed and both individuals stick by it,  things should go fine.