<prompt> Human: My girlfriend and I are moving in together and we would like to share a credit card for common items such as groceries, toiletries, etc. Is it possible to get a joint credit card? Which credit card has the best cash rewards program? Any suggestions would be greatly appreciated.  <response>: I combined accounts my girlfriend now almost-wife and it still works fine. Key to this is my assumption that both partners are trustworthy.Our original system: Separate checking accounts Separate credit card accounts We would reimburse each other 5050 for joint expenses. Since I ended up paying the rent, we would just addsubtract from her rent reimbursement payment at the end of each month.Eventually, we didnt like dealing with the reconciliation at the end of each month. In addition, we make different amounts, so paying 5050 on the bills didnt appear equitable. So we moved to...Our combined system: One joint checking account that received all the paychecks and paid all the joint bills. One joint credit card for some bills and joint expenses. Separate checking accounts. Separate credit cards for individual purchases ultimately paid from separate checking accounts. Guilt Free Spending Money distributions to the separate checking accounts each month. This money was to buy whatever we wanted without worry of how it would affect our finances. Furthermore it helps maintain that sense of having your own money. Anything left after paying GFSM and bills went to joint savings.This system works excellent, and most of it is automated. 