How to categorize business expenses

Categorizing expenses well is what turns a bank feed into a tax return. Done consistently, it also shows where the money goes. This guide gives the common categories, the tricky cases and the items that are not expenses at all.

By Mirza Fahad Baig, Chartered Accountant. Reviewed by Hamza Fida, Chartered Accountant. Checked against official sources on . 2 minute read.

Short answer

To categorize business expenses, give every cost one consistent category that matches a line on your tax return, such as advertising, contract labor, software or travel. Split mixed personal and business costs, record equipment as an asset unless it falls under the $2,500 de minimis rule, and keep owner draws, loan principal and sales tax out of expenses entirely.

At a glance

Guiding rule
One category per cost, matched to a tax return line
Mixed costs
Split between business and personal
Equipment
An asset, unless under the de minimis rule
De minimis safe harbor
Up to $2,500 per item or invoice, for most small businesses
Not expenses
Owner draws, loan principal, sales tax collected
Meals
Generally 50% deductible, so track them separately
How to categorize business expensesSteps: 1. Set rules for recurring costs; 2. Review new suppliers by hand; 3. Attach the receipt; 4. Review monthly.THE PROCESS AT A GLANCEHow to categorize business expenses1Set rules forrecurring costsMost accounting software cancategorize the same supplierthe same way every time2Review new suppliersby handDecide the category once,then add a rule3Attach the receiptEspecially for meals, traveland larger purchases4Review monthlyCompare each category withlast month and fix anythingmisplacedChecked against official sourcesTax BakersHow to categorize business expensesSteps: 1. Set rules for recurring costs; 2. Review new suppliers by hand; 3. Attach the receipt; 4. Review monthly.THE PROCESS AT A GLANCEHow to categorize businessexpenses1Set rules for recurring costsMost accounting software can categorize thesame supplier the same way every time2Review new suppliers by handDecide the category once, then add a rule3Attach the receiptEspecially for meals, travel and largerpurchases4Review monthlyCompare each category with last month andfix anything misplacedChecked against official sourcesTax Bakers
The process at a glance: 1. Set rules for recurring costs; 2. Review new suppliers by hand; 3. Attach the receipt; 4. Review monthly.

Which categories should you use?

CategoryTypical costs
AdvertisingOnline ads, sponsored listings, printed materials
Car and truckBusiness mileage or the business share of vehicle costs
Commissions and feesMarketplace and payment platform fees
Contract laborFreelancers and contractors
InsuranceBusiness liability and property insurance
InterestInterest on business loans and cards, not the principal
Legal and professionalAccountants, lawyers, bookkeepers
Office and softwareSubscriptions, supplies, small equipment
RentOffice, warehouse or equipment rental
Taxes and licensesBusiness licenses, state fees, employer payroll taxes
TravelFlights, lodging and transport for business trips
MealsBusiness meals, kept separate because generally 50% deductible
UtilitiesPhone and internet, business share
WagesPay to employees, not owners of pass-through businesses

These follow the lines of Schedule C. See how to set up a chart of accounts and Schedule C.

How do you categorize consistently?

  1. Set rules for recurring costs

    Most accounting software can categorize the same supplier the same way every time.

  2. Review new suppliers by hand

    Decide the category once, then add a rule.

  3. Attach the receipt

    Especially for meals, travel and larger purchases.

  4. Review monthly

    Compare each category with last month and fix anything misplaced.

Keep proof for each item. See what the IRS accepts as proof of an expense.

How do you handle mixed-use costs?

Only the business part is a business expense. For a phone used 60% for business, record 60% of the bill. Keep a note of how you worked out the percentage. For the home office and vehicle, follow their specific rules. See the home office deduction and vehicle expenses.

Meals and travel have their own percentages. See meals, travel and entertainment.

When is a purchase equipment, not an expense?

Items that last more than a year, such as computers and machinery, are generally assets and depreciated, although Section 179 and bonus depreciation usually allow the full cost to be deducted in the first year. Under the de minimis safe harbor, most small businesses without audited financial statements can instead expense items costing up to $2,500 per item or invoice straight away, by making the election on their return. See deductible business expenses.

Depreciation and Section 179 are claimed on Form 4562.

What is not an expense at all?

  • Owner draws and distributions: equity, not expenses.
  • Loan principal repayments: they reduce the loan. Only the interest is an expense.
  • Sales tax collected: a liability owed to the state.
  • Transfers between your own accounts: not income or expense.
  • Personal spending: excluded, or recorded as an owner draw if paid from the business account.

Want your expenses categorized for you?

We categorize every transaction monthly to match your tax return, and flag anything that needs a receipt or a decision.

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Questions people ask

How should I categorize business expenses?

Give each cost one consistent category matched to a line on your tax return, such as advertising, contract labor or software.

What is the de minimis safe harbor?

An election letting most small businesses without audited financial statements expense items costing up to $2,500 per item or invoice.

Is a loan payment a business expense?

Only the interest. The principal repayment reduces the loan balance.

How do I categorize a phone used for business and personal calls?

Record only the business share, based on a reasonable estimate of business use.

Sources

Every fee, date and rule on this page was taken from these official and primary sources.

  1. IRS: About Schedule C (Form 1040)
  2. IRS: Tangible property final regulations, including the de minimis safe harbor
  3. IRS Publication 535: Business Expenses

Rules and fees change. If you are reading this long after September 30, 2026, confirm the figures with the source before you rely on them.

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This guide is general information. It is not tax or legal advice for your situation.