Understanding tax deductions is crucial for small business owners who want to minimize their tax liability and maximize their profits. In 2025, with evolving tax rules and inflation pressures, knowing which expenses are deductible can make a significant difference in your business's bottom line. This guide covers the most impactful deductions, documentation rules, and strategic planning ideas to help you keep more of what you earn.
To be deductible, a business expense must be ordinary, necessary, and directly related to your business. An ordinary expense is common and accepted in your industry. A necessary expense is helpful and appropriate for your business. The expense must also be reasonable in amount and properly documented.
If you use part of your home exclusively and regularly for business, you may qualify. Choose between the simplified method or the regular method based on your records and potential deduction size.
Deduct qualifying equipment in the year of purchase up to annual limits, or depreciate over time. This includes computers, office furniture, and certain software.
Track business mileage or actual expenses. Maintain a mileage log with date, purpose, and miles to substantiate your deduction.
Wages, benefits, and payroll taxes are deductible. Issue Form 1099-NEC for contractors paid $600+.
Office rent, utilities, business insurance, and internet/phone services are deductible when used for business.
Deduct website costs, ads, design, accounting, legal, and consulting fees that support operations.
Keep receipts, invoices, bank/credit statements, and written business purposes. Avoid mixing personal and business expenses. For meals, record the business purpose and attendees; only 50% is generally deductible.
Properly leveraging tax deductions can significantly lower your tax bill while keeping you compliant. Work with a qualified tax professional and maintain strong documentation to ensure you maximize savings. Use our tax calculator to estimate your liability and model scenarios.