Think of your budget as a planning device, a means of setting and reaching your goals. You project future expenditures (including savings), record them when they're made, and see whether your projections were any good. If they aren't, you adjust your planning or your spending, whichever is out of line.
Use the household budget worksheet to enter a month's expenditures; we do the addition and subtraction for you. You can even work a couple of months ahead at first, until you get the hang of it. Then you can budget further ahead. After a while you'll want to apply the same principles to long-term goal setting by forecasting the growth of your net worth and all the little pieces that compose it.
Fixed spending
Some of your projections will be easy: You know what your mortgage or rent payments will be in the months ahead. Same for car payments and the premiums coming due on insurance policies. So why budget for them? Because by recording these and other fixed expenditures as monthly outgo, you can see at a glance how much of your income is committed to current or future expenses. That should stop you from spending it on something else.
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Variable spending
Here you'll keep track of the items over which you have some degree of control. This section is the place to test your cost-cutting skills. Watch for patterns that may signal trouble. If the "miscellaneous" line keeps growing bigger, for instance, your recordkeeping may be careless.
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