Jessica I. Marschall, CPA, ISA AM
October 24th, 2025
Introduction
Many clients request a concise yet reliable reference outlining which business expenses are deductible when filing Schedule C (Form 1040). This form is used by sole proprietors, single-member LLCs, and other Disregarded Entities to report income and expenses from their trade or business activities.
Under Internal Revenue Code Section 162(a), taxpayers may deduct all ordinary and necessary expenses paid or incurred during the taxable year in carrying on a trade or business. An expense is considered ordinary if it is common and accepted within a given industry, and necessary if it is helpful and appropriate for the business. These deductions directly reduce taxable income and are essential for accurately reflecting the true cost of operating a business.
However, Section 162 works in conjunction with Section 263(a), which limits deductions for capital expenditures—costs that create or improve assets with a useful life extending beyond the current year. Such costs must be capitalized and recovered over time through depreciation or amortization. The Tangible Property Regulations (Treas. Reg. §§ 1.263(a)-1 through -3) clarify these distinctions and provide safe harbors that allow small-dollar expenses, routine maintenance, and certain improvements to be deducted immediately under defined thresholds.
In practical terms, most day-to-day operational expenses—such as rent, supplies, insurance, utilities, and professional fees—fall squarely within Section 162 and are currently deductible. Larger purchases like vehicles, equipment, and building improvements are generally capitalized and deducted over time. Maintaining accurate, contemporaneous records such as receipts, invoices, mileage logs, and payment confirmations is critical to substantiate these deductions.
This guide summarizes the most common categories of deductible expenses that may appear on Schedule C and is intended for educational and reference purposes only. Each taxpayer’s facts and circumstances are unique, and all deductions should be evaluated in consultation with a qualified tax professional to ensure compliance with the Internal Revenue Code and Treasury Regulations.
Part I: Section 165 Ordinary and Necessary Expenses
1. General Business Operating Expenses
- Advertising and marketing (print, digital, mailers, SEO, sponsorships)
- Bank fees and merchant processing fees
- Business insurance (general liability, professional liability, property, etc.)
- Commissions and fees
- Contract labor (Form 1099-NEC payments to independent contractors)
- Dues and subscriptions (trade associations, professional memberships)
- Education and training directly related to your business
- Licenses and regulatory fees
- Office expenses (supplies, postage, small tools)
- Printing, copying, and stationery
- Repairs and maintenance of business property or equipment
- Software subscriptions (QuickBooks, Adobe, Canva, etc.)
- Telephone, internet, and fax expenses
- Utilities for business property
- Uniforms or protective clothing (if required for work and not suitable for everyday use)
2. Professional Services
- Accounting, bookkeeping, and tax preparation fees
- Legal and professional consulting fees
- Business coaching or management consulting
3. Vehicle and Transportation Expenses
- Standard mileage deduction (if using your personal vehicle for business)
- Actual expenses (gas, oil, insurance, repairs, depreciation, registration, lease payments)
- Parking fees and tolls for business use
- Business-related vehicle rentals or car-share costs
4. Travel, Meals, and Entertainment
- Airfare, train, or bus fare for business trips
- Hotels, lodging, and temporary accommodations
- Meals (50% deductible; 100% for employer-provided events under certain rules)
- Taxi, rideshare, or rental car during travel
- Tips, baggage fees, and other incidental travel expenses
- Conference and seminar registration fees
5. Home Office Deduction (if applicable)
- Direct expenses: painting, repairs to the office space
- Indirect expenses (percentage based on business use of home):
- Rent or mortgage interest
- Utilities (electricity, water, gas)
- Property insurance
- Property taxes
- Depreciation (for owned homes)
- Homeowners association dues (if applicable)
6. Wages, Payroll, and Employee Benefits
- Salaries and wages to employees
- Employer-paid payroll taxes (Social Security, Medicare, FUTA)
- Employee retirement plan contributions
- Health insurance premiums for employees
- Employee education and training
- Employee bonuses and commissions
7. Rent and Lease Payments
- Office or retail space rent
- Equipment and machinery lease payments
- Vehicle leases used for business
8. Depreciation and Amortization
- Depreciation on furniture, fixtures, machinery, vehicles, and buildings
- Section 179 expense deduction for eligible equipment purchases
- Bonus depreciation (if applicable)
- Amortization of intangible assets (goodwill, patents, software, etc.)
9. Inventory and Cost of Goods Sold (COGS)
- Beginning and ending inventory
- Purchases of goods held for resale
- Cost of materials and supplies
- Direct labor costs for production
- Freight-in and shipping costs for inventory
10. Interest Expenses
- Business loan interest
- Credit card interest (on business cards only)
- Mortgage interest on business property
11. Taxes and Licenses
- Business income taxes (state or local, not federal income tax)
- Employer payroll taxes
- Personal property tax on business assets
- Business license fees and franchise taxes
- Real estate taxes on business property
- Sales tax paid on business purchases (if not recovered as credit)
12. Utilities and Occupancy Costs
- Electricity, water, gas, waste disposal
- Internet and phone service
- Security system and monitoring fees
13. Retirement and Benefit Contributions
- SEP-IRA, SIMPLE IRA, or solo 401(k) contributions for self-employed
- Health insurance premiums for self and family (if not eligible for employer plan)
- HSA (Health Savings Account) contributions (if high-deductible plan applies)
14. Technology and Communications
- Computer hardware and peripherals
- Website hosting and domain registration
- Cloud storage fees
- Business cell phone and service plans
15. Miscellaneous and Industry-Specific Expenses
- Continuing education and professional certifications
- Safety equipment and OSHA compliance costs
- Trade show and expo fees
- Freight, shipping, and postage for customer deliveries
- Client gifts (deductible up to $25 per recipient per year)
- Bad debts (if previously included in income)
- Charitable contributions made directly by a C-Corp (note: sole proprietors generally deduct personal charitable contributions on Schedule A, not C)
16. Recordkeeping and Compliance
- Bookkeeping software and subscriptions
- Secure document storage and shredding
- Legal document filing and renewal fees
Part II Schedule C Deductible Expenses by Line Item
| Line # | Category / Description | Examples of Deductible Expenses |
| 8 | Advertising | Digital and print ads, sponsorships, social media campaigns, signage, SEO, mailers |
| 9 | Car & Truck Expenses | Standard mileage, fuel, repairs, depreciation, insurance, tolls, parking |
| 10 | Commissions & Fees | Broker fees, referral commissions, agent payments |
| 11 | Contract Labor | Subcontractors, freelancers, consultants (Form 1099-NEC) |
| 12 | Depletion | Natural resource extraction (oil, gas, timber, mining) |
| 13 | Depreciation & Section 179 | Equipment, furniture, vehicles, improvements, amortized intangibles |
| 14 | Employee Benefit Programs | Health, dental, vision, group life, childcare, tuition assistance |
| 15 | Insurance (Other than Health) | General liability, property, E&O, workers’ compensation |
| 16a | Interest – Mortgage | Business property mortgages, secured loans |
| 16b | Interest – Other | Credit-card or line-of-credit interest for business use |
| 17 | Legal & Professional Services | Accounting, tax preparation, legal, advisory, business consulting |
| 18 | Office Expense | Office supplies, postage, stationery, software, small tools |
| 19 | Pension & Profit-Sharing Plans | SEP-IRA, SIMPLE IRA, solo 401(k) employer contributions |
| 20a | Rent or Lease – Vehicles/Equipment | Leased machinery, tools, vehicles |
| 20b | Rent or Lease – Other Property | Office, retail, or warehouse rent |
| 21 | Repairs & Maintenance | Routine maintenance, minor repairs, upkeep of equipment |
| 22 | Supplies | Materials used in production or daily operations |
| 23 | Taxes & Licenses | Business license fees, payroll taxes, franchise taxes, property taxes |
| 24a | Travel | Airfare, lodging, taxis, rideshare, baggage, tips |
| 24b | Deductible Meals | Meals with clients or while traveling (50% deductible) |
| 25 | Utilities | Electricity, gas, water, internet, phone, trash service |
| 26 | Wages | Employee wages, salaries, bonuses, commissions |
| 27a | Other Expenses | Bank fees, software, subscriptions, education, uniforms, gifts ($25 limit), security, shipping |
Line 27a — Other Expenses (Attach statement or schedule)
Typical examples include:
- Bank service charges and merchant fees
- Bookkeeping software (QuickBooks, Xero, etc.)
- Computer equipment and accessories (under capitalization threshold)
- Dues and memberships (chambers of commerce, professional orgs)
- Education, certifications, and continuing professional training
- Internet hosting, domain registration, web maintenance
- Postage, shipping, and delivery fees
- Business gifts (up to $25 per recipient per year)
- Safety equipment and uniforms (not suitable for everyday wear)
- Subscriptions and trade journals
- Temporary help agency fees
- Client entertainment (limited, if directly related to business)
- Bad debts (if previously included in income)
- Freight-in and outbound freight for goods sold
- Charitable contributions made by C-corps (not usually for Schedule C filers)
- HSA contributions for self-employed (deducted on Form 1040 Schedule 1 but often noted here for tracking)
- Business use of cell phone service
- Software and app subscriptions
- Security services
Additional Deductions Reported Elsewhere on Schedule C
| Section | Deduction Type | Notes |
| Part III – Cost of Goods Sold (Lines 35-42) | Beginning/ending inventory, purchases, direct labor, materials, supplies | Applies if you sell products or manufacture goods |
| Part IV – Vehicle Information | Mileage or actual expenses | Required if claiming Line 9 deduction |
| Part V – Other Expenses (continuation) | Itemized details from Line 27a | Attach supporting statement |
| Home Office Deduction (Form 8829) | Indirect and direct home-use expenses | Mortgage interest, rent, property taxes, utilities, depreciation, maintenance, insurance |
Other Common Above-the-Line Deductions for the Self-Employed (Not on Schedule C)
(Still tied to business income but reported on Form 1040, Schedule 1)
- Self-employed health insurance deduction
- Self-employment tax (deductible half)
- Retirement plan contributions (SEP, SIMPLE, solo 401(k))
Compliance Reminder
All expenses must be ordinary, necessary, and directly related to the operation of your business. Supporting documentation should be retained for at least three years after filing the return (longer if depreciation, inventory, or carryforwards apply).
