Consistency is the most important principle. Pick a category for each type of expense and use it every time. If you put office supplies in “Office Expenses” one month and “Supplies” the next, your financial reports become meaningless. You can’t track spending trends when the same expense shows up in different places.

The foundation is having the right chart of accounts. QuickBooks comes with default categories, but they don’t fit every business. A trucking company needs fuel and maintenance categories. A restaurant needs food cost categories. A contractor needs job materials separate from office supplies. If your chart of accounts doesn’t match how your business actually operates, you’ll constantly struggle with where things should go. Proper QuickBooks setup at the start prevents ongoing headaches.

Most transactions fall into predictable patterns. Revenue goes to income accounts based on what you sell. Materials you buy to resell or use directly in your work are cost of goods sold. Office rent, utilities, insurance, and professional fees are operating expenses. Loan payments split between interest expense and principal reduction on the liability. Owner draws are not expenses at all. They reduce equity.

When you’re unsure about a transaction, ask what it’s for. An expense that directly creates what you sell belongs in cost of goods sold. An expense that keeps the business running is an operating expense. Something costing over $2,500 that will last more than a year is probably an asset to depreciate, not an expense to deduct immediately.

The mistakes I see most often include categorizing everything as miscellaneous because it’s easy, treating owner personal expenses as business costs, putting equipment purchases in supplies instead of fixed assets, and creating dozens of categories that nobody uses consistently. Too many categories is almost as bad as too few because transactions get scattered randomly.

Getting categorization right from the start saves hours during tax season and gives you reports that actually mean something. If your books have been inconsistent for months or years, a bookkeeper near Gentry can help clean things up and establish a system that works going forward. The goal isn’t perfection on every transaction. It’s a consistent approach you can maintain week after week.