Business expenses: what makes an expense potentially deductible?
The test is not whether you paid it from the business account. It is purpose, reasonableness and documentation.
"Can I deduct this?" is the most frequent question we hear, and the honest answer usually starts with another question: what is the business purpose, and can you show it?
The general framework U.S. tax rules broadly allow a deduction for expenses that are ordinary and necessary for carrying on your trade or business. In plain language: common and accepted in your line of work, and helpful and appropriate for it. Amounts also have to be reasonable, and personal expenses are not deductible simply because a business paid them.
Some categories have their own specific rules and limitations, and those rules change over time. That is why a general article can explain the framework but not settle your particular expense.
The three things that matter - Purpose. Why does the business need this, and how does it relate to producing income? - Allocation. If something is used for both business and personal purposes, only the business portion is generally relevant, and the split must be reasonable and supportable. - Documentation. What you have if someone asks: receipt, invoice, contract, mileage log, notes on who and why for meals and travel.
Categories where owners most often go wrong - Mixed-use items: vehicles, phones, home office space, travel that includes personal days. - Meals and entertainment, which have specific rules that differ from each other and have changed several times. - Purchases of equipment, which may be recovered over time rather than deducted entirely in the year paid, depending on the rules and elections that apply. - Owner draws, treated as taking money out of the business rather than as a business expense. - Paying family members without real work, real records and reasonable pay. - Clothing, gifts and memberships, where the personal element usually decides the outcome.
A habit that solves most of it Pay business expenses from business accounts, keep the receipt, and add a one-line note about the purpose when it is not obvious. Documentation created at the time is worth far more than a reconstruction two years later.
What to do with the gray areas Write them down and raise them with your tax preparer during the year, while there is still time to structure things properly. A defensible, well-documented smaller deduction is worth more than an aggressive one you cannot support.
This is general educational information, not advice about your specific expenses — the treatment depends on your facts, entity type and the rules in effect for the year. Our monthly plans keep the records that support your deductions, and our tax team reviews them with you. Contact us to talk about your situation.
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