Expense deductibility guide

Clear yes / no / depends answers for common U.S. federal business-expense deductions — with practical conditions, current reporting guidance, examples, and recordkeeping notes for freelancers, self-employed people, and small business owners.

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How to use this guide

Each lookup page starts with a simple answer, then explains the facts that change it: who paid the cost, business vs personal use, special limitations, elections, reporting, and records.

The guide focuses on U.S. federal income tax rules. Pages are reviewed against primary IRS sources such as forms, instructions, publications, revenue procedures, and IRS guidance. Review dates are updated after substantive checks rather than automatically.

Schedule C line references use the latest finalized IRS form available. Where final 2026 forms or instructions are not yet published, the individual page says so and the filing-year line should be confirmed before filing.

State tax treatment can differ. If your facts are unusual, high-dollar, or involve an entity-level issue, professional tax advice may be appropriate.

Sources and scope

Individual lookup pages cite the more specific IRS sources that apply to their topic.

FAQ

What business expenses are tax deductible?

Ordinary and necessary business expenses can be deductible, but each category has its own rules. Common examples include advertising, supplies, business insurance, professional fees, vehicle costs, qualifying travel and meals, software, interest, repairs, rent, utilities, and depreciation. Home office, health insurance, equipment, education, and mixed-use expenses have additional requirements.

Can I deduct expenses if I am self-employed?

Generally yes when the expense is ordinary and necessary for your trade or business and any category-specific rules are met. Schedule C is used for many sole-proprietor expenses, while some deductions—such as the self-employed health insurance deduction—are reported outside Schedule C.

How can equipment be deducted?

Business equipment can follow several possible rules, including the de minimis safe harbor, Section 179, bonus depreciation, or regular depreciation depending on the property, cost, business-use percentage, and elections. It is not automatically a Section 179 deduction.

What is the difference between a tax deduction and a tax credit?

A deduction reduces income used to calculate tax, while a credit directly reduces tax under the credit's rules. The value of a deduction depends on the taxpayer's facts and tax calculation, so a fixed percentage should not be assumed.

What records do I need for business expense deductions?

Keep records that establish the amount, date, business purpose, and business-use portion when relevant. Receipts, invoices, payment records, mileage or travel logs, and allocation worksheets may be needed depending on the expense. Timely records are generally easier to support than records reconstructed much later.

Last reviewed: August 18, 2026