Running a business comes with a long list of expenses, but many owners overlook legitimate deductions that can significantly reduce their taxable income. We see the same pattern every year: business owners deduct the obvious items but miss dozens of fully compliant, IRS-approved expenses that could lower their tax burden.
This guide walks through key deductible categories, including many lesser-known items that can make a big difference at tax time.
1. General Business Expenses
The IRS allows deductions for anything that is both ordinary (common in your industry) and necessary (helpful for running your business).
- Business insurance (liability, cybersecurity, E&O)
- Bank and merchant fees
- Legal and CPA services
- Software subscriptions (QuickBooks, Microsoft 365, Google Workspace)
- Shredding services and document security
- Identity theft monitoring for businesses
- Virtual mailbox services
- Domain privacy protection
- Research databases
- Depreciation for equipment and improvements
2. The Home Office Deduction
If your home office is used exclusively and regularly for business, you can deduct a portion of:
- Rent or mortgage interest
- Utilities
- Property taxes
- Homeowners/renters insurance
- Repairs and maintenance
- Depreciation on the office area
You can also use the simplified method: $5 per square foot, up to 300 sq ft.
Important caution:
The home office must be your principal place of business. If you maintain a separate physical office location that is regularly available and used for substantially the same business activities, the home office deduction may be limited or disallowed. This is a common IRS audit focus, so eligibility should be evaluated carefully based on your specific facts.
Reimbursement method:
- S corporations
- An Accountable Plan is required to reimburse home office and other personally paid business expenses so they remain deductible to the business and non-taxable to the shareholder. We can assist with setting up and administering this plan.
- C corporations
- While not technically mandatory, an Accountable Plan is strongly recommended to ensure reimbursements are deductible by the corporation and not treated as taxable wages to the employee or shareholder.
- Partnerships
- An Accountable Plan is not required, but a reimbursement policy is recommended. Without reimbursement, partners may only deduct these expenses on their individual returns if they qualify as unreimbursed partnership expenses (UPE) under the partnership agreement or established practice.
- Sole proprietorships and single-member LLCs:
- These expenses are deducted directly on the individual tax return, and an Accountable Plan is not required.
Also see separate guide regarding renting your personal residence to the business or the Augusta Rule.
3. Marketing and Advertising: Fully Deductible Growth Expenses
Everything you do to promote your business is deductible. This includes:
- Website design, hosting, and domain fees
- Online advertising (Google, Facebook, LinkedIn)
- SEO software
- Professional social media management
- Business cards and brochures
- Promotional materials
- Sponsorships where your brand is displayed
- Professional photography
- Brand redesign work
More creative options include:
- Props and backdrops for video content
- Stock photos, music, and video subscriptions
- Podcast production and hosting
- Influencer collaborations
4. Client-Facing Wardrobe and Accessories: Deductible Only in Narrow Cases
Clothing is only deductible if:
- It is required for work
- It is not suitable for everyday wear
- It is worn exclusively for business
Examples that often qualify:
- Apparel with your business logo
- Outfits used solely for recorded video or promotional photos
- Distinctive items or accessories used to establish professional brand identity
- Makeup or hair styling used only for filming
- Costume-style clothing used for marketing campaigns
Regular suits, shoes, or everyday clothes are not deductible.
5. Business Travel: Deductible When the Primary Purpose Is Business
Travel expenses are allowed when the trip is primarily for business. This includes:
- Airfare and lodging
- Taxis, rideshare services, rental cars
- 50% of meals while traveling
- Tolls and parking
- Travel insurance
- Baggage fees
- Laundry while traveling
- TSA PreCheck or Global Entry if used mainly for business
- Passport fees required for international business
Keep detailed records of the business purpose.
6. Vehicle and Transportation
Business owners can choose from:
Standard mileage deduction
Covers wear and tear, gas, insurance, maintenance, and depreciation.
Actual expenses
Includes fuel, repairs, insurance, depreciation, registration, and more.
Other deductible items:
- Parking fees
- Tolls
- Business-related rideshare rides
Commuting from home to a separate office is not deductible but traveling between offices is deductible.
7. Technology and Equipment
Modern businesses rely heavily on technology, and the IRS recognizes this. Deductible items include:
- Computers, tablets, monitors
- Printers, scanners, shredders
- Cameras, microphones, lighting
- Office furniture
- Cybersecurity tools (VPN, password managers, antivirus)
- External storage and cloud backups
- Business cell phone (business percentage)
- Teleprompters and recording gear
- Paid AI tools
- Workflow automation apps (Zapier, Make, n8n)
Many of these qualify for Section 179, allowing immediate expensing rather than depreciation.
8. Professional Development
The IRS allows deductions for education that maintains or improves skills you already use in your business, including:
- Industry conferences and seminars
- Online courses
- Trade association memberships
- Business coaching and masterminds
- Media training
- Negotiation and communication courses
- Books or subscriptions that enhance your business abilities
(Note: education that qualifies you for a new trade is not deductible.)
9. Business Meals
Meals are deductible at 50% when:
- With clients or prospects
- For networking
- While traveling
- Provided during office meetings
Meals provided for company events (like training days) can be 100% deductible.
Be sure to document:
- Who you met with
- The purpose
- Where you ate
- The amount
10. Professional Services
Any expert help you hire is deductible, including:
- Bookkeepers
- Accountants
- Tax preparers (for business returns)
- Attorneys
- IT consultants
- Virtual assistants
- Contractors or freelancers
11. Retirement and Health
- Health insurance premiums
- HSA contributions
- SEP/SIMPLE IRA contributions
- 401(k) contributions (employee + employer portions)
- Defined benefit and cash balance plans
12. Research and Development
If your business creates new products or improves existing ones, you may deduct:
- Prototype materials
- Product testing
- Market research
- Patent attorney fees
- Software development
R&D Credit vs. Deduction: While you can deduct R&D expenses, the R&D Tax Credit is even more powerful because it is a dollar-for-dollar reduction of your tax bill, not just a reduction in taxable income.
13. Hiring Your Children
Hiring your children isn’t just about teaching them work ethic; it’s a legitimate tax strategy when done correctly.
- You hire your children to perform legitimate tasks (filing, cleaning, social media modeling, inventory management) and pay them a reasonable wage.
- You deduct their wages as a business expense.
- Since the standard deduction is over $14,600 (2025), your child can earn up to that amount federal income tax-free. Many owners then have their children contribute those earnings to a Roth IRA, setting them up for decades of tax-free growth.
14. Pass-Through Entity Tax
For years, business owners struggled with the $10,000 federal limit on State and Local Tax (SALT) deductions. In 2025, new legislation raised this personal deduction cap to $40,000, but there is a catch that makes the PTET strategy just as vital as before.
For successful business owners, the “Pass-Through Entity Tax” (PTET) remains the superior strategy because it bypasses the personal income limits entirely.
- For earners over $600k, your personal deduction is slashed back to $10,000. By electing PTET, your business pays the state tax, converting it into a fully deductible business expense that is not subject to the SALT cap or the income phase-out.
- Even if you qualify for the new $40,000 personal cap, the PTET allows you to deduct the entire amount through your business, rather than capping out at $40,000 personally.
15. Cost Segregation
If you own your business office building, “standard” depreciation (39 years) is slow. A Cost Segregation Study breaks down your property into components (carpeting, lighting, landscaping, security systems) that can be depreciated much faster, often over 5, 7, or 15 years.
- Bonus Depreciation: This allows you to write off a significant portion of the building’s cost in the very first year, creating a substantial deduction that can offset other business income.
16. Miscellaneous Expenses
- Client gifts (up to $25 per person unless branded)
- Background checks
- Data breach protection tools
- Password managers
- Cloud storage or backup
- Office snacks and beverages
- Networking group dues
- Parking validation
- Digital product production costs (ebooks, templates, downloads)
Final Thoughts: Small Deductions Create Big Tax Savings
Knowing what’s deductible and keeping proper records can dramatically reduce your tax liability. The IRS gives business owners wide latitude to deduct expenses that are ordinary, necessary, and directly tied to operations.
If you’re unsure whether an expense qualifies, document the business purpose and reach out to us. The worst mistake business owners make is not claiming legitimate deductions they’re entitled to.