Tax write-offs A to Z
Every write-off you can legally take, with the law behind it
deductions, credits and tax-free items for small businesses, freelancers and families, each with its Internal Revenue Code section and where it goes on your return. Updated for the 2025 tax law.
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Find the ones that fit you
The free Tax Finder asks plain questions and lists what applies to you; the Tax Planner works out quarterly payments so April holds no surprises. Inside BlissPoint, Aiva does both from your own books.
Questions
What can I write off as a small business owner or freelancer?
Ordinary and necessary business expenses under IRC section 162: advertising, software, your phone and internet (business share), mileage, a home office, equipment, insurance, professional fees, travel, 50% of business meals, retirement contributions and more. Search the list above for the code section and form line for each.
Is a write-off the same as a deduction?
Yes. A write-off lowers taxable income. A credit is better: it lowers the tax itself, dollar for dollar. Both are in this list, marked by category.
Can I write off my car?
The business share of it, using either the IRS standard mileage rate or actual costs, with a mileage log (date, where, why, miles). Vehicles over 6,000 pounds can often be written off in the first year.
Can I deduct my home office?
Yes, if a space is used regularly and only for your business. The simplified method is $5 per square foot up to 300 square feet; the regular method uses a share of rent or mortgage interest, utilities and insurance.
What isn’t deductible?
Entertainment like tickets and golf (since 2018), personal expenses, government fines and penalties, commuting, and clothing you could wear outside work. They’re marked “Not deductible” in the list.
How do I avoid a surprise tax bill?
Pay estimated taxes each quarter. If your payments plus withholding equal last year’s total tax (110% if your income was over $150,000), there’s no underpayment penalty. The free Tax Planner works out each payment.
Federal law; states differ. Confirm with a CPA, enrolled agent or tax attorney before acting.