However, the way the word "budget" was used in the OP did not capture this broad definition. The OP was talking about a detailed budget that gives line items for things like groceries, etc. This is what most people were responding to.
I agree that there are all sorts of ways to "budget." I work best in a three category "budget": savings, fixed expenses, everything else. This is not what most people would consider a "real" budget though. It works for me, and always has -- even when my paycheck was barely covered food and rent.
Some people do better when they don't need to think about money all the time -- a detailed budget lets them set up categories once a year (or some other broad time period) and then they can go on autopilot. When grocery money is gone, it's gone. When their insurance comes due, they have been saving each month for it and the money is there.
For me, that kind of budget is stressful. I know how much money can be spent on "not savings/fixed expenses" and don't worry about how it falls month to month. I know this system would stress other people out. Structure is a comfort to some and claustrophobic to others.
This is exactly right. For some, a very structured budget brings comfort. That's me. Other's can be a bit more loose about it, and be fine.
Having said that....both are still living within in a budget.
Here's exactly what we do each January.....
At the top of the page, we put our estimated after-tax income. That number isn't set in stone, DH may get a raise, I may earn more than I previously anticipated....but we generally come very close.
From that number we deduct the amount we plan to save for the year. 401Ks are maxed out. For me, with a self-employed 401K we add an additional 20% of my profits. The majority goes to taxable accounts. We discuss what money to put into what funds. And we also look at the performance of our funds and determine if we need to make any moves in that department.
Having done that, we total up all of our monthly bills. Utilities, all insurance costs, a set amount of vehicle maintenance, pet spending, property taxes, groceries. And that's it. We don't like having 50 categories...that would drive me nuts. There's not too much fluctuation from year to year on these items, but we usually bump each category up a bit from year to year to allow for some inflation....giving up a cushion. We multiply that number by 12....those are our monthly bills for the year. Deduct from our net income after savings.
Having done that, we ended up with about 54,000 this year, This year we decided on a two week trip to France....with the Dollar in the toilet, we allotted $16,000 for that trip. That leaves us with 38 K. We deduct $6,000 for my husband's hobby.....the guitar. $2,400 for lessons and $3,600 for "musical toys". This is a passion of his, and it makes him very happy....it's in the budget.
That leaves 32,000. We have a cleaning person who comes every other week. Deduct 2,600. That leaves $29,400
$29,400 divided by 12 is $2,450....and that's our "monthly spending money" for each month. We don't break that down any further. That's for eating out...gifts....clothing....splurges of any kind.
And so the only number I care about each month is $3,250....our grocery spending ($800) plus our discretionary income. I keep an eye on it monthly. Almost all of our spending goes on AMEX....so I can see the running total. If we have a particular big thing coming up....for example, my cousin will get married next year and we'll give him $1,000 for a gift (he's like a nephew), so I'll mention that to DH ahead of time, and we'll likely pull $350 a month a few months ahead of time so it doesn't all hit in one month....that kind of thing.
We keep a $5,000 "mini-emergency" fund for major car repairs and household expenses. It's kept in checking and so it also acts as a "cushion" in case bills need to be paid before DH's check hits our account...that kind of thing. But at the end of the year, that 5K is there. If we have a major repair and that can't be paid out of discretionary income, and we dip into the 5 K, we set a plan to pay the money back until we get to 5K again. And we keep a year's expenses that is never ever touched.... Only to be used if absolutely necessary.
And that's it. It's quite easy really. The money comes in and moves to various investment accounts, gets paid to bills, or builds up in money market funds for upcoming trips.
That's how we run our household budget. Once it's set, I don't even have to think about it.....other than to keep an eye on the two categories I mentioned. Having a budget brings an extraordinary amount of peace to your financial life.