Schedule C Deductions 2026: Every Business Expense You Can Write Off

Every deduction you miss on Schedule C is money you overpay in taxes. A freelancer earning $80,000 who misses $15,000 in legitimate deductions pays an extra $5,490 in federal and self-employment taxes. Here is every category, with what qualifies and what doesn’t.

The Core Rule: Ordinary and Necessary

Every Schedule C deduction must meet the IRS standard: the expense must be ordinary (common and accepted in your industry) and necessary (helpful and appropriate for your business). Personal expenses are never deductible. Mixed-use items (like a phone or car used for both business and personal) are only deductible in proportion to business use.

Schedule C Deduction Categories: Complete Reference

Part II: Expenses (Lines 8–27a)

Line 8: Advertising

All expenses to market and promote your business:

• Website hosting, domain registration
• Social media advertising (Facebook, Instagram, Google Ads)
• Business cards, brochures, flyers
• Sponsorships with a business purpose
• Online directory listings

Does not include: Costs of your own time promoting your business (you can’t deduct your own labor)

Line 9: Car and Truck Expenses

Two methods — choose one per vehicle per year:

Standard Mileage Rate (2026): 72.5 cents per mile (Jan–Jun), 76 cents per mile (Jul–Dec)

The IRS raised the rate mid-year for 2026 — track which half of the year each business trip falls in.

Actual Expense Method: Deduct the business-use % of:

• Gas and oil
• Car insurance
• Repairs and maintenance
• Registration and license fees
• Depreciation (or Section 179 in year one)
• Car loan interest (business-use % only)

If you use your car 60% for business, you deduct 60% of all actual costs.

Recordkeeping required: Date, destination, business purpose, and miles for every trip — including which 2026 rate period the trip falls in. A mileage app (MileIQ, Everlance) makes this easy.

Line 10: Commissions and Fees

Payments to non-employees for services:

• Sales commissions paid to independent contractors
• Referral fees
• Finder’s fees

If you pay a single person more than $600/year, you must issue a 1099-NEC.

Line 11: Contract Labor

Payments to freelancers and independent contractors you hire. Same as Line 10 in practice — the IRS separates them for reporting purposes. Both are fully deductible; both require 1099-NEC if over $600.

Line 13: Depreciation and Section 179

Capital assets with a useful life over 1 year must be depreciated — unless you elect immediate expensing:

Most small business owners elect Section 179 or bonus depreciation for equipment, computers, software, and machinery to get the full deduction immediately. See the bonus depreciation guide and Section 179 guide for details on which to use.

Line 14: Employee Benefit Programs

Benefits you provide to employees (not yourself):

• Health insurance premiums for W-2 employees
• Group life insurance premiums
• Employee retirement plan contributions (401k match, SIMPLE IRA)

Your own health insurance as a self-employed person is deducted on Schedule 1, Line 17 — not Schedule C.

Line 15: Insurance

Business insurance premiums:

• General liability insurance
• Professional liability / E&O insurance
• Business property insurance
• Workers’ compensation insurance
• Cyber liability insurance

Does not include life insurance on yourself (not deductible) or health insurance for yourself (deducted elsewhere).

Line 16a & 16b: Interest

• Line 16a: Mortgage interest on business property
• Line 16b: Other business interest (business credit card interest, business loan interest)

Personal credit card interest used for business: deductible only if the card is used exclusively for business, or if you can document the business portion.

Line 17: Legal and Professional Services

• Attorney fees for business matters
• CPA or tax preparer fees for your business return
• Business consultant fees
• Bookkeeping fees

The cost of preparing your personal return is not deductible on Schedule C. Only fees directly related to the business.

Line 18: Office Expense

Small office supplies and consumables:

• Paper, pens, ink cartridges
• Postage and shipping
• Software subscriptions (if below Section 179 threshold)
• Desk accessories

Items over $2,500 typically should be capitalized (depreciated) unless using the de minimis safe harbor.

Line 19: Pension and Profit-Sharing Plans

Contributions to retirement plans you establish for yourself and employees (2026 limits):

• SEP-IRA: up to 25% of net self-employment income, max $72,000
• Solo 401(k): up to $24,500 employee elective deferral, plus employer contributions, capped at $72,000 combined
• SIMPLE IRA: up to $17,000 employee, plus employer match

These are among the most powerful deductions available — each dollar contributed reduces both income tax and, indirectly, future self-employment tax through reduced QBI.

Line 20a & 20b: Rent or Lease

• Line 20a: Rent on vehicles, machinery, and equipment
• Line 20b: Rent on business property (office, studio, workshop)

If you rent a desk at a co-working space, that’s fully deductible here. Month-to-month software subscriptions often go on Line 18 or 26 instead.

Line 21: Repairs and Maintenance

Costs to maintain business property in working condition:

• Fixing business equipment
• Painting a business office
• Routine maintenance on business vehicles (oil changes, tires)

Capital improvements (adding value or extending useful life) must be depreciated — not expensed on Line 21.

Line 22: Supplies

Items specific to your trade or business that are used up during the year. Different from general office supplies (Line 18):

• A plumber’s pipe fittings and solder
• A photographer’s SD cards and batteries
• A baker’s ingredients (if business-related)
• Specialized tools under $2,500

Line 23: Taxes and Licenses

• Business licenses and permits
• State and local business taxes
• Payroll taxes on employee wages (employer portion)
• Self-employment tax deduction: the deductible half of SE tax is taken on Schedule 1, not Schedule C, but effectively reduces the same taxable income

Cannot include: Federal income tax, federal SE tax (it’s not a business expense — it’s a personal obligation)

Line 24: Travel and Meals

Travel (Line 24a) — 100% deductible:

• Airfare, train, bus for business travel
• Hotel while traveling overnight for business
• Rental car during business trip
• 50% of meals while traveling overnight

Requirements: Must be away from your “tax home” (your regular place of business) overnight.

Meals (Line 24b) — 50% deductible:

• Business meals with clients, prospects, or business partners
• Must document: date, place, amount, business purpose, relationship of attendees
• Your lunch eaten alone while working is NOT deductible

Line 25: Utilities

If you have a dedicated business space (office, studio, workshop):

• Electricity, gas, water
• Internet for the business
• Phone (business-use portion)

For a home office, utilities are claimed as part of the home office deduction (Line 30), not here.

Line 26: Wages

Wages paid to employees (W-2 employees only). Does not include payments to independent contractors (those go on Lines 10–11) or your own compensation (sole proprietors cannot pay themselves wages).

Line 30: Home Office Deduction

Simplified method: $5/sq ft × business sq ft (max 300 sq ft = $1,500)

Regular method: Actual home expenses × (business sq ft ÷ total home sq ft)

Rules: The space must be used exclusively and regularly for business. A guest bedroom that occasionally doubles as an office does not qualify.

Above-the-Line Deductions That Don’t Appear on Schedule C

These reduce income tax further — claim on Schedule 1:

These are claimed after Schedule C but reduce your adjusted gross income — making them especially powerful.

Quick-Reference Deduction Table

Vehicle expenses on Schedule C can be calculated using the IRS standard mileage rate or actual costs — the mileage rate is simpler for most self-employed workers. If you work from home, the home office deduction is one of the most valuable Schedule C items — worth up to $1,500 per year with the simplified method. After calculating your Schedule C net profit, the QBI deduction can reduce your taxable income by an additional 20%.

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.