We are both involved and we communicate about finances for both our personal and our company.
I am the one who runs our company finances (CFO).... run the payroll, AP/AR, etc. Therefore, I am the one that gets the money in the bank and pay bills but we are both involved with what we spend. I have always been the one with the checkbook and the one to pay the regular bills. We don't set a budget, we just know where we stand.
For instance, he just told me yesterday that he ordered 6 yards of dirt to be delivered this morning which is about $325. This is the 6th load since Feb. he works hard on our yard. Last week was prom.... he is aware that I paid $500 for a limo for daughter and her date to keep them from driving downtown Dallas and get them to/from all events safely plus I paid $200 for professional photographer fees prom pictures, not including the pictures I bought.
We don't give each other "permission" for expenditures, we just communicate what we are doing so we are both aware of where everything stands.
On the other hand, hubby is more experienced with investing, he's the one with the MBA, better numbers person and good forecaster so he is more involved with personal investments and our financial advisor etc but I am fully aware of everything they elect to do as far as any additional investing and he keeps me informed.
So I guess you could say, we tag team the moola around here!