Just because you can legally deduct something doesn't mean you should claim it without careful consideration. Some deductions, while technically legal, frequently trigger IRS scrutiny because they're commonly abused or misunderstood. Here are seven deductions that warrant caution, along with the reality behind each one.
Home office deduction. Myth: You can deduct any room in your home where you occasionally check email. Reality: The IRS requires that you use the space exclusively and regularly for business. A spare bedroom that doubles as a guest room doesn't qualify. The simplified method ($5 per square foot) is safer from audit risk than the regular method, but even the simplified method requires a genuine business use.
Vehicle expenses. Myth: You can write off all your car expenses because you're "always working." Reality: You must document actual business use. The standard mileage rate is easier to defend because it's a mechanical calculation—you just multiply miles by the IRS rate. But you need a mileage log showing date, destination, and business purpose for each trip. If you're audited and can't produce this log, the deduction will be disallowed.
Business entertainment. Myth: Taking clients to dinner is fully deductible as a business expense. Reality: Business entertainment deductions were largely eliminated by the Tax Cuts and Jobs Act. Meals while traveling for business are still 50% deductible, but pure entertainment (tickets to sporting events, golf outings, etc.) is no longer deductible. Many people don't realize this change and claim disallowed deductions.
Professional development. Myth: Any education or training is deductible as a business expense. Reality: The education must maintain or improve skills in your current business, not help you start a new career. Taking a course in blockchain development when you're a financial consultant is likely not deductible. Keep documentation showing how the education relates to your current work.
