Start with the basics. Use one business bank account and one business credit card. Every business expense flows through these accounts, nothing through personal accounts. This separation is the foundation of effective expense tracking. Without it, you’re constantly trying to remember which personal card purchases were actually for business.

Capture receipts immediately. Paper receipts fade, get crumpled in your pocket, or disappear entirely. Use your phone to photograph receipts the same day you get them. Apps like Dext or Hubdoc can pull receipt images directly into QuickBooks or your accounting software. Some credit cards and payment apps generate digital receipts automatically. The goal is having documentation stored digitally where you can find it months or years later if needed.

Categorize expenses as they happen, not in batches later. When you buy supplies, pay for software subscriptions, or cover a business meal, code them correctly in your accounting software that same week. Waiting until month-end or quarter-end means you’re guessing at context you’ve already forgotten. That $127 charge from three weeks ago could be anything by the time you look at it.

Use consistent expense categories that make sense for your business and match what you need for tax reporting. Materials, professional services, advertising, software, meals. If you’re not sure how to categorize something, pick a category and use it consistently. Your accountant can adjust at year-end, but consistency matters more than perfection in the moment.

Reconcile weekly, not monthly. Weekly reconciliation takes 15 to 20 minutes. Monthly reconciliation takes hours because you’re trying to remember transactions from weeks ago. Weekly also catches duplicate charges, fraud, and coding errors while you still remember what actually happened. Ongoing bookkeeping typically includes regular reconciliation, but if you’re handling it yourself, build the weekly habit.

Track mileage if you’re claiming vehicle expenses. Apps like MileIQ run in the background and log trips automatically. Reconstructing a year of business mileage from memory doesn’t work and the IRS knows it. Either track as you go or don’t claim the deduction.

Keep personal expenses out of business accounts completely. If something personal accidentally goes on the business card, flag it immediately and code it to owner’s draw. Mixing personal and business expenses creates problems at tax time and makes your financial statements unreliable for making decisions.

The payoff for good expense tracking is real. Accurate books, easier tax preparation, legitimate deductions you would have missed, and actual visibility into where your money goes. Most business owners who feel like money is disappearing have an expense tracking problem, not a spending problem. You can’t manage what you don’t measure.

If tracking feels overwhelming or you’re always behind, that’s usually a sign you need better systems or outside help. Greater Boston bookkeepers can establish workflows that make tracking simpler and catch the errors you’d miss doing it yourself. The cost of professional help is often less than the deductions you’re missing and the time you’re wasting trying to reconstruct records after the fact.