Small Business Tax Deductions You Might Be Missing

Most small business owners deduct the obvious: rent, utilities, supplies, equipment. Here are the deductions that often get missed.

1. The QBI Deduction (Section 199A)

The Qualified Business Income (QBI) deduction lets pass-through business owners — sole proprietors, partnerships, S-corps — deduct up to 20% of qualified business income from their taxable income.

If you’re a sole proprietor with $100,000 in net business income, you may be able to deduct $20,000, dropping your taxable income to $80,000.

Limitations:

• For high-income filers, limits apply based on wages paid and qualified property
• Certain service businesses (lawyers, doctors, consultants) phase out at higher incomes
• You must have business income (can’t deduct a loss you’ve already taken)

This is one of the largest available deductions for small business owners and is frequently under-utilized.

2. Home Office

Covered in more detail in other posts, but frequently missed. If you have a space used exclusively and regularly for business — even a dedicated room or a clearly partitioned area — this qualifies.

Simplified method: $5/sq ft, up to 300 sq ft = up to $1,500 deduction. Regular method: business percentage of all home expenses (often 2-4x more).

3. Business Vehicle (Mileage or Actual Expenses)

If you drive for business — to meet clients, pick up supplies, attend events — either the standard mileage rate ($0.67/mile in 2024) or your actual vehicle expenses are deductible in proportion to business use.

Log every business drive with date, destination, and purpose. Do it in real time — the IRS doesn’t accept year-end reconstructions.

4. Health Insurance Premiums (Self-Employed)

Self-employed business owners who pay their own health insurance can deduct 100% of premiums as an above-the-line deduction — not just itemized. This includes medical, dental, and vision.

Also deductible for coverage of your spouse and dependents if they’re on your plan.

Note: you can’t deduct premiums for any month you had access to employer-sponsored coverage through a W-2 job.

5. Retirement Contributions

Contributions to a SEP-IRA, SIMPLE IRA, or Solo 401(k) are fully deductible and reduce both income tax and self-employment tax.

• SEP-IRA: up to 25% of net SE income, max $69,000
• Solo 401(k): employee contributions up to $23,000 + employer contributions up to 25% of net SE income
• SIMPLE IRA: up to $16,000 employee contribution + employer match

This is the most powerful tax reduction available to most small business owners, and it builds retirement wealth simultaneously.

6. Startup Costs

If your business started in the past 1-2 years, check whether you properly deducted startup costs. The IRS allows:

• Up to $5,000 in startup costs deducted in year 1 (reduced when total startup costs exceed $50,000)
• Remaining costs amortized over 15 years

Qualifying startup costs: market research, advertising before opening, professional fees for business formation, training.

7. Education and Professional Development

Business-related education expenses are deductible when they maintain or improve skills required for your current business. This includes:

• Professional courses, workshops, seminars
• Books and publications related to your business
• Subscriptions to professional journals or tools

Note: education that qualifies you for a new career doesn’t qualify. The IRS distinguishes between maintaining skills (deductible) and acquiring new career qualifications (not deductible).

8. Business Meals (50% Deductible)

Meals with clients, customers, or employees where there’s a genuine business discussion are 50% deductible. Keep records:

• Date
• Attendees and their business relationship
• Business purpose of the meal
• Amount

Note: entertainment is no longer deductible (eliminated by the 2017 Tax Cuts and Jobs Act). Meals remain 50% deductible if they’re clearly separate from entertainment.

9. Banking and Payment Processing Fees

Bank fees, credit card processing fees, PayPal fees — all business deductions. These are small individually but add up over a year of transactions. Make sure your expense tracking captures them by category.

10. Software and Subscriptions

All software, apps, and subscriptions used for business are fully deductible: accounting software, project management tools, cloud storage, design software, CRM platforms.

Review your credit card statements for subscriptions you’ve forgotten about — both to deduct the legitimate ones and to cancel the unnecessary ones.

Review last year’s Schedule C with these deductions in mind. If you missed any, amended returns are possible for up to 3 years. If you’re current with your taxes, build a checklist to capture all of these before your next return.