Small Business Tax Deductions: 25 Deductions You Are Probably Missing

Most small business owners overpay on taxes because they do not know what they can deduct. The IRS allows you to deduct any expense that is "ordinary and necessary" for your business. That covers far more than most people realize.

This guide lists 25 deductions, how to claim them, and what records you need to keep.

How Tax Deductions Work

A deduction reduces your taxable income. If you earn $100,000 and have $30,000 in deductions, you pay taxes on $70,000. The actual savings depend on your tax bracket:

• Sole proprietor at 24% bracket: $30,000 in deductions saves $7,200
• S Corp at 24% bracket: Same $7,200, plus potential self-employment tax savings
• LLC at 32% bracket: $30,000 in deductions saves $9,600

Every dollar you legitimately deduct is a dollar you keep.

The 25 Most Overlooked Deductions

1. Home Office Deduction

If you use part of your home exclusively and regularly for business, you can deduct it. Two methods:

• Simplified method: $5 per square foot, up to 300 sq ft = $1,500 max
• Actual expense method: Deduct a percentage of rent, utilities, insurance, and depreciation based on office square footage vs total home. Usually results in a larger deduction

The space must be used exclusively for business. Your kitchen table does not count. A dedicated room used only as an office does.

2. Internet and Phone

Deduct the business percentage of your internet and phone bills. If you use your phone 70% for business, deduct 70% of the bill. Keep a log for the first month to establish your usage percentage.

3. Software and Subscriptions

Every SaaS tool you use for business is deductible:

• Accounting software (QuickBooks, Xero, Wave)
• Project management (Asana, Trello, ClickUp)
• Email marketing (Mailchimp, ConvertKit)
• Design tools (Canva, Adobe)
• CRM (HubSpot, Pipedrive)
• Cloud storage (Google Drive, Dropbox)
• Communication (Slack, Zoom)
• SEO tools (Ahrefs, SEMrush, Ubersuggest)

4. Business Insurance

All business insurance premiums are deductible: general liability, professional liability, workers' compensation, property insurance, and cyber liability.

5. Professional Development

• Online courses and certifications
• Business books and audiobooks
• Conference tickets and travel
• Professional association memberships
• Industry publications and subscriptions

6. Business Meals

Meals with clients, partners, or employees are 50% deductible. The meal must be directly related to business. Keep the receipt and note who you met with and the business purpose.

7. Travel Expenses

Business trips are fully deductible:

• Flights and train tickets
• Hotel stays
• Rental cars and rideshare
• 50% of meals during travel
• Baggage fees
• Tips for service staff

Personal vacations are not deductible, but if you add a business meeting to a trip, the business portion may be deductible. Keep detailed records.

8. Vehicle Expenses

Two methods:

• Standard mileage: 67 cents per mile (2026 rate). Simple: track miles driven for business
• Actual expenses: Deduct business percentage of gas, insurance, repairs, registration, and depreciation. Better for vehicles with high operating costs

Use a mileage tracking app (MileIQ, Everlance) to log every business trip automatically.

9. Equipment and Furniture

Computers, desks, chairs, monitors, printers, and other business equipment are deductible. You can either:

• Section 179 deduction: Deduct the full cost in the year purchased (up to $1,160,000 for 2026)
• Bonus depreciation: 80% first-year depreciation for 2026
• Regular depreciation: Spread the cost over the asset's useful life (3-7 years)

10. Advertising and Marketing

All marketing expenses are deductible:

• Google Ads and Facebook Ads
• Social media management tools
• Freelance writers and designers
• Business cards and printed materials
• Trade show booth fees
• Sponsorships and event advertising

11. Legal and Professional Fees

• Attorney fees for business matters
• CPA or tax preparer fees
• Bookkeeping services
• Business consulting
• Patent and trademark applications

12. Bank Fees

Monthly account fees, transaction fees, wire transfer fees, and payment processing fees (Stripe, PayPal) are all deductible.

13. Education and Training for Employees

Training programs, workshops, and courses for you or your employees are deductible if they improve skills needed in your current business. Note: courses to start a NEW business are not deductible until that business is operational.

14. Health Insurance Premiums

If you are self-employed and not eligible for a spouse's employer plan, you can deduct 100% of your health insurance premiums as an adjustment to income (not a itemized deduction). This includes medical, dental, and vision insurance.

15. Retirement Contributions

• Solo 401(k): Contribute up to $69,000 for 2026
• SEP IRA: Contribute up to 25% of compensation, max $69,000
• SIMPLE IRA: Contribute up to $16,000 plus employer match

These are deducted from your taxable income, reducing your tax bill while building retirement savings.

16. Contractors and Freelancers

Payments to independent contractors (designers, writers, developers, consultants) are fully deductible. Issue 1099-NEC forms for contractors paid $600+ per year.

17. Office Supplies

Pens, paper, printer ink, sticky notes, folders, and other consumable office supplies. Small individually but adds up over a year.

18. Business Gifts

Client gifts are deductible up to $25 per person per year. Include the cost of shipping and engraving (not subject to the $25 limit).

19. Bad Debt

If a customer owes you money and you have exhausted collection efforts, you can write off the uncollectible amount as a bad debt deduction.

20. Startup Costs

Costs incurred before your business launched (market research, legal fees, advertising) are deductible: up to $5,000 in the first year, remainder amortized over 15 years.

21. Charitable Contributions

Business donations to qualified charities are deductible. For sole proprietors, these go on Schedule A. For corporations, they are business deductions.

22. Interest on Business Loans

Interest paid on business loans, business credit cards, and lines of credit is deductible. The principal is not deductible (that is the loan repayment, not an expense).

23. Repairs and Maintenance

Repairs to business property (fixing a broken printer, repairing office plumbing) are fully deductible in the year incurred. Improvements (renovating an office) must be depreciated.

24. Wages and Salaries

Employee wages, salaries, bonuses, and commissions are deductible. So are employer-paid payroll taxes, workers' compensation premiums, and employee benefits.

25. Depreciation

If you own business property (real estate, vehicles, equipment), you can deduct depreciation each year. This is a non-cash deduction that reduces taxable income without reducing your bank balance.

Documentation Requirements

The IRS requires you to have documentation for every deduction. For each expense, keep:

• Receipt: Paper or digital (photos of receipts are acceptable)
• Date: When the expense occurred
• Amount: How much you paid
• Business purpose: Why it was necessary for your business
• Vendor: Who you paid

Record-Keeping Tools

• QuickBooks or Xero: Categorize expenses automatically from bank feeds
• Expensify or Dext: Scan receipts and auto-extract data
• Google Drive or Dropbox: Store digital receipts in organized folders
• Shoeboxed: Mail-in receipt scanning service

Keep records for at least 3 years after filing (6 years if you underreported income by 25%+).

Deductions vs Credits

Deductions reduce taxable income. Credits reduce tax liability directly. A $1,000 deduction at 24% bracket saves $240. A $1,000 credit saves $1,000.

Common business tax credits:

• R&D tax credit: For developing new products or processes
• Work Opportunity tax credit: For hiring from certain disadvantaged groups
• Small business health care tax credit: For providing health insurance to employees

Common Audit Triggers

1. Home office deduction that seems too large: Keep it proportional to your home
2. 100% business use of a vehicle: Very rare. Most people drive personally too
3. Large meal and entertainment deductions: Keep detailed notes on business purpose
4. Claiming losses year after year: The IRS expects a profit in 3 of 5 years
5. Round numbers: $1,000 exactly looks suspicious. Use actual amounts
6. Mixing personal and business expenses: Commingling is the #1 audit trigger

Disclaimer

This guide is for informational purposes only. Tax laws change annually. Consult a CPA or tax professional for advice specific to your situation. The deduction amounts and limits mentioned are for the 2026 tax year.

Conclusion

Most small businesses leave thousands of dollars on the table by not tracking and claiming legitimate deductions. Start by reviewing your expenses with your accountant, implement a receipt-tracking system, and make sure you are claiming every deduction you are entitled to. The savings can be significant.