The way we did our budget was to keep track of everything we spent for 2 months (all receipts). Then we made a regular spreadsheet with all the regular monthly bills listed individually, and other catagories for "gasoline", "eating out", and other things that vary monthly. So now we keep enough money in the checking account to pay the regular monthly bills (like the phone, electricity, etc). Everything else we keep seperate amounts of cash for each catagory. And however much we were spending those first two months, we made sure to lower that amount somehow in our budget (like if we had spent $400 on groceries a month, we budgetted only $300 from now on, and all we have is $300 to spend and it's cash so we CAN'T go over. That's a hypothetical example.) It helps us both out if we can actually SEE the money. Whenever we just used the checking account for eveything, it was always overdrawn b/c it was impossible to keep track of. And now I'm in the same situation as you, DH's income is steady and I get paid per project, so we are cutting back even more, but the cash system really helps b/c like I said it's easier when we can see the money. It works so well that I'm really not worried about the fluctuating income all that much. I'm confident that we can make it work.