What Business Expenses Should I Track?

Quicke Business Collective
3 days ago
3 min read

Track every cost that's connected to running your business — because each one you record does two jobs: it lowers your taxable income and it shows you your real profit. The IRS standard is simple to remember: a business expense must be "ordinary and necessary" — common and helpful for your line of work. The most-missed categories for new owners are home office, vehicle use, software and subscriptions, professional services, and the small recurring costs that quietly add up. When in doubt, record it and keep the receipt.

Here are the common categories worth tracking, and the rule that ties them together.

Woman reviews receipts at a desk with laptop and calculator in a cozy office, focused and slightly concerned.

The rule that governs all of it

Per the IRS, deductible business expenses must be "ordinary and necessary" — ordinary meaning common in your industry, necessary meaning helpful and appropriate for your business. Personal costs don't qualify, and some things (like a computer or vehicle used for both) have to be split between business and personal use. That standard is your guide whenever you're unsure whether something counts.

Common categories to track

Most small businesses will touch several of these:

Home office — a portion of rent/mortgage, utilities, and internet if you use part of your home regularly and exclusively for business (see IRS Publication 587).

Vehicle and mileage — business miles driven, using the IRS standard mileage rate or actual costs. Keep a log.

Supplies and equipment — the physical things you buy to do the work.

Software and subscriptions — the tools, apps, and services your business runs on. These are easy to lose track of.

Advertising and marketing — ads, website, design, printing, and promotion.

Professional services — legal, accounting, and consulting fees.

Insurance, rent, utilities, and interest — the ongoing costs of operating.

Education and travel — business-related learning and trips (with the rules that apply).

Infographic titled What to track with 8 expense categories: home office, mileage, supplies, software, marketing, pro services, insurance, travel.

The one habit that makes it painless

The SBA's core finance advice is to keep proper bookkeeping — and the single habit that makes it work is separating business and personal money. A dedicated business bank account and card mean your expenses are already gathered in one place, so tracking becomes reviewing, not reconstructing. Add a simple way to store receipts and you're most of the way there.

Google Sheets expense tracker showing totals, business miles, category chart, and a table of dated business expenses.

Frequently asked questions

Do I really need every receipt?

Keep records for anything you deduct — the IRS can ask you to substantiate expenses. Digital photos of receipts are fine and far easier than a shoebox.

Can I deduct a purchase used for both business and personal?

Often yes, but only the business-use portion. A phone or car used 60% for business means roughly 60% is deductible — so track the split.

What's the most-missed deduction?

Home office, mileage, and software subscriptions top the list, along with small recurring fees that never feel big enough to log.

Do I need accounting software to start?

No — a simple spreadsheet and a separate business account are enough at first. The tool matters less than the consistent habit.

This article is general information, not tax advice. Consult a qualified tax professional or the IRS for your specific situation.

Want a tracking system you'll actually stick with?

This article covered the what and the why. The Quicke Business Collective's Business Starter Program walks you through the how — setting up simple, real-world systems to track expenses and keep more of what you earn.

👉 Join the Business Starter Program