Include all variable expenses now, car maintenance, electricity, heating, these can vary throughout the year you need to calculate them and come up with an average monthly amount. None essential expenses like eating out coffee at Starbucks, weekend getaways, extravagant vacations, fancy clothing, motorcycles, ATV's, if you use them, write them down, realize these are wants, not needs. Now total these all up, fixed expenses, variable expenses, and non_essential expenses,there you now have your total expenses.
Second, and more importantly, this method doesn't provide any real guidance on what to do with money as it comes in. You're left to try to figure it out as you go. Mistakes are made...frustration sets it... you give up. That's because your budgeting worksheets are missing the most crucial part of any budget _ the spending plan.