25 Tax Deductions Every Small Business Owner Should Know

The difference between a $50,000 tax bill and a $35,000 tax bill often comes down to knowing which deductions exist. Here are 25 deductions that small business owners frequently miss or underutilize.

Disclaimer: This is general information, not tax advice. Consult a CPA or tax professional for your specific situation.

Home Office (Deductions 1–2)

1. Home Office Deduction

If you use part of your home regularly and exclusively for business, you can deduct a portion of your housing costs. Two methods:

• Simplified method: $5 per square foot, up to 300 sq ft = max $1,500 deduction
• Regular method: Calculate the percentage of your home used for business and apply it to mortgage interest/rent, utilities, insurance, repairs, and depreciation

The regular method often yields a larger deduction but requires more recordkeeping. A 200 sq ft office in a 2,000 sq ft home = 10% of qualifying expenses.

2. Home Internet and Phone

If you use your internet and phone for business, deduct the business-use percentage. If 60% of your internet usage is business-related, deduct 60% of the bill. Keep a log to support your estimate.

Vehicle and Travel (Deductions 3–6)

3. Vehicle Expenses

Two methods:

• Standard mileage rate: 67 cents per mile (2024). Track every business mile.
• Actual expense method: Deduct gas, insurance, repairs, depreciation, and lease payments proportional to business use.

Track mileage consistently using an app like MileIQ or Everlance. The IRS won’t accept estimates - you need a contemporaneous log.

4. Business Travel

Airfare, hotels, ground transportation, and 50% of meals while traveling for business. The trip must be primarily for business. If you extend a business trip by a couple of personal days, the business portion remains deductible.

5. Parking and Tolls

Business-related parking fees and tolls are fully deductible in addition to the standard mileage rate. Don’t overlook these - they add up.

6. Moving Expenses for Business Equipment

If you relocate your business or move equipment to a new facility, those costs are deductible.

Meals and Entertainment (Deductions 7–8)

7. Business Meals

Meals with clients, prospects, or colleagues where business is discussed are 50% deductible. The meal must not be “lavish or extravagant” (a subjective standard, but think reasonable, not outrageous).

What to document: Date, amount, who attended, business purpose, and the business relationship. Credit card statements alone are not sufficient - keep notes.

8. Office Snacks and Meals for Employees

Food and beverages provided to employees at the workplace are 50% deductible. Holiday parties and company picnics are 100% deductible as employee recreation.

Equipment and Technology (Deductions 9–12)

9. Section 179 Deduction

Instead of depreciating equipment over several years, Section 179 lets you deduct the full purchase price in the year you buy it, up to $1,160,000 (2024 limit). This applies to:

• Computers and software
• Office furniture
• Machinery and equipment
• Vehicles over 6,000 lbs GVWR (with limits)

10. Bonus Depreciation

For assets that don’t qualify for Section 179 or exceed the limit, bonus depreciation allows 60% first-year deduction (2024, phasing down 20% per year). This applies to new and used equipment.

11. Software Subscriptions

All business software - accounting (QuickBooks), project management (Asana), email marketing (Mailchimp), CRM (HubSpot) - is deductible as a business expense.

12. Computer and Phone Equipment

If you buy a computer, tablet, or phone used partly for business, deduct the business-use percentage. If 80% business use, deduct 80% of the cost.

Insurance (Deductions 13–15)

13. Health Insurance Premiums

Self-employed individuals can deduct 100% of health, dental, and vision insurance premiums for themselves, their spouse, and dependents. This is an above-the-line deduction - you get it even if you don’t itemize.

14. Business Insurance

General liability, professional liability (errors & omissions), commercial property, product liability, workers’ compensation, and cyber liability insurance premiums are all deductible.

15. Business Use of Personal Vehicle Insurance

If you use the actual expense method for vehicle deduction, the business-use portion of your auto insurance is deductible.

People Costs (Deductions 16–18)

16. Employee Wages and Benefits

All compensation paid to employees - wages, bonuses, vacation pay - is deductible. So are employer-paid benefits: health insurance contributions, retirement plan contributions, and education assistance (up to $5,250/year per employee tax-free).

17. Contract Labor

Payments to independent contractors (1099 workers) are fully deductible. This includes freelancers, consultants, virtual assistants, and gig workers you hire for your business.

18. Payroll Taxes

The employer’s share of Social Security and Medicare taxes (7.65%) is deductible, as are state unemployment taxes (SUTA) and federal unemployment taxes (FUTA).

Operations (Deductions 19–22)

19. Rent

Office rent, warehouse rent, retail space rent, equipment rental - all fully deductible. If you prepay rent, you can typically only deduct the portion that applies to the current tax year.

20. Utilities

Electricity, gas, water, trash, and internet for your business premises. If you work from home, these are part of the home office deduction (see #1).

21. Professional Services

Fees paid to attorneys, accountants, bookkeepers, tax preparers, and consultants for business purposes. Yes, the fee you pay your CPA to prepare your business tax return is itself deductible.

22. Advertising and Marketing

All marketing expenses: Google Ads, Facebook Ads, print advertising, website costs, SEO services, business cards, promotional materials, trade show booths, and sponsorships.

Financial (Deductions 23–25)

23. Business Loan Interest

Interest on loans used for business purposes - term loans, lines of credit, SBA loans, business credit cards - is deductible. The key is that the funds must be used for business, not personal expenses.

24. Retirement Plan Contributions

As a self-employed individual, you can contribute to:

• SEP IRA: Up to 25% of net self-employment income, max $69,000 (2024)
• Solo 401(k): Up to $23,000 employee contribution + 25% of net income as employer contribution, max $69,000 total (or $76,500 if over 50)
• SIMPLE IRA: Up to $16,000 employee contribution + 3% employer match

These contributions reduce your taxable income dollar-for-dollar. A $30,000 SEP IRA contribution at a 32% tax bracket saves $9,600 in federal taxes alone.

25. Self-Employment Tax Deduction

You pay both the employer and employee portions of Social Security and Medicare (15.3% total). The employer half (7.65%) is deductible on your personal tax return as an adjustment to income. On $100,000 of net self-employment income, that’s a $7,065 deduction.

Commonly Overlooked Deductions

Bank fees and merchant processing fees. Monthly account fees, wire transfer fees, and the 2.9% + $0.30 per transaction from Stripe or Square are all deductible.

Business books and courses. Books, online courses, workshops, and conferences related to your business are deductible as education expenses.

Dues and subscriptions. Professional association memberships, trade publications, and industry-specific subscriptions (Bloomberg, industry journals).

Bad debts. If a customer doesn’t pay an invoice and you’ve exhausted collection efforts, you can write off the amount as a bad debt deduction.

Startup costs. You can deduct up to $5,000 in startup costs in your first year (reduced dollar-for-dollar if total startup costs exceed $50,000). Remaining costs are amortized over 15 years.

Record-Keeping Best Practices

The IRS requires you to substantiate deductions. Keep:

• Receipts for all expenses over $75 (and ideally for everything)
• Mileage logs with date, destination, business purpose, and miles
• Bank and credit card statements showing business transactions
• Contracts and invoices for professional services and contract labor
• A separate business bank account - commingling personal and business funds is the fastest way to lose deductions in an audit

Use accounting software (QuickBooks, Wave, FreshBooks) and scan receipts digitally. Paper fades; digital files don’t.

The Biggest Mistake: Not Tracking

Most small business owners don’t overpay taxes because deductions don’t exist. They overpay because they don’t track expenses well enough to claim them. A $20 business lunch three times a week is $1,560/year in deductible meals. Those Uber rides to client meetings, the software subscriptions, the home office - they compound into thousands of dollars in tax savings that disappear without records.

Start tracking today. Your future self at tax time will thank you.