The Simple Way to Track Small Business Expenses (Free Expense Tracker)
Every dollar you spend running your business is either a deduction you’ll claim or a deduction you’ll lose — and the only thing that decides which is whether you wrote it down. A small business expense tracker is how you make sure none of it slips through: a simple, consistent place to log what you spend, tagged so that at tax time your deductible total is one glance away instead of a weekend of receipt archaeology.
You don’t need accounting software to do this well. Here’s the whole system.
Separate business from personal — first, always
The single most important habit: keep business money and personal money apart. Open a dedicated business checking account and card, and run every business cost through it. This isn’t just tidiness — mixing the two (“commingling”) is the fastest way to lose deductions and to turn a routine tax return into a headache. One clean account means one clean feed of expenses to track.
Set up your expense categories
Tag every expense with a category from day one — ideally aligned to the Schedule C lines the IRS uses (Schedule C is the US form sole proprietors file for business profit and loss). The categories most small businesses actually use:
- Supplies & materials — anything that goes into your product or service.
- Advertising & marketing — ads, promotions, design tools.
- Software & subscriptions — the apps that run your business.
- Fees & payment processing — platform fees, Stripe/PayPal, transaction costs.
- Shipping & postage, packaging.
- Home office & utilities — a portion, if you have a dedicated workspace.
- Mileage & travel — logged at the IRS standard rate.
- Contract labor, professional services — VAs, designers, your accountant.
Tag as you go, not in April. (For the full breakdown, see Small Business Expense Categories: A Schedule C Cheat Sheet.)
Log every expense the same way
For each cost, record four things: date, amount, category, and a short note of what it was for. That’s it. The discipline isn’t in the detail — it’s in the consistency. A five-minute weekly habit of logging the week’s expenses beats a heroic once-a-year scramble every time, because you’ll actually remember what “$47, misc” was for when you write it down the same week.
Flag what’s deductible
Not every expense is fully deductible, and some (like meals or home office) follow special rules. Add a simple deductible flag to each entry so your tracker can total your write-offs automatically — you always know your deductible number, and you have a clean list to hand your accountant.
Keep the receipts
The IRS can ask you to back up a deduction, so keep proof. Snap a photo of each receipt and file it (a phone photo is fine). You don’t need to attach it to every row — just keep them somewhere organized by month, so a flagged expense in your tracker can be matched to its receipt if it’s ever questioned.
Grab the free expense tracker
Ready to start? Our free Income & Expense Tracker gives you the core system — log money out (and in), tagged by category, with your totals adding up automatically.
When you want the full picture, the Small Business Bookkeeping Spreadsheet adds an automatic Profit & Loss dashboard, Schedule C-style categories, a deductible flag for instant write-off totals, and built-in mileage and sales-tax trackers — in Google Sheets and Excel, light and dark.
Keep reading: Small Business Expense Categories: A Schedule C Cheat Sheet and Bookkeeping for Etsy Sellers.
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