If you're a 1099 contractor, you're likely leaving thousands of dollars in deductions on the table. The tax code is complex, and most self-employed professionals simply don't know all the expenses they can legally deduct. This guide covers the most commonly overlooked write-offs that can reduce your tax bill significantly.
First, understand the basic rule: to deduct a business expense, it must be ordinary and necessary for your work. "Ordinary" means it's something commonly accepted in your field. "Necessary" means it's helpful and appropriate for your business. You don't need to be 100% certain the expense will be allowed—a reasonable belief is sufficient.
Let's go through the deductions you're probably missing.
Home office deduction. If you use a portion of your home exclusively for business, you can deduct related expenses. The simplified method allows $5 per square foot (up to 300 square feet). The regular method calculates the actual percentage of your home used for business and applies that to all home expenses—mortgage interest, property taxes, utilities, insurance, repairs. For high-income areas with expensive homes, the regular method often produces a larger deduction.
Health insurance premiums. As a self-employed individual, you can deduct 100% of your health insurance premiums for yourself, your spouse, and dependents. This includes medical, dental, and vision insurance. The deduction is taken on Line 17 of Schedule 1, and it reduces your adjusted gross income (AGI), which can also lower other income-based limitations.
Retirement contributions. Solo 401(k)s, SEP-IRAs, and SIMPLE IRAs all allow significant tax-deductible contributions. A solo 401(k) lets you contribute both as an employee (up to $23,000 in 2024) and as an employer (up to 25% of compensation), potentially allowing six-figure contributions. SEP-IRAs permit contributions up to 25% of net self-employment income, with a $69,000 cap for 2024. These deductions reduce your taxable income substantially.
