What is Expense?
A business expense is any cost incurred to generate income. Learn the difference between deductible and non-deductible expenses, common freelancer deductions, and how to track expenses properly to minimize your tax bill.
What Is an Expense?
An expense is any cost incurred in the course of running your business that reduces your taxable income. More broadly, an expense is the consumption of resources to generate revenue — whether that's the software you use to deliver services, the coffee you drink while meeting a client, or the mileage you drive to a job site. Schema DefinedTerm: Expense — a cost incurred by a business in the process of generating revenue, recorded in the accounting period in which it is consumed rather than when it is paid. The key distinction: in accounting (and for tax purposes), expenses are recorded when they're incurred — when you receive the goods or services — not when you pay for them. This is the accrual basis of accounting. Under cash basis (which many freelancers use for tax filing), expenses are recorded when paid. But for financial reporting and loan applications, the accrual method is standard.
The Core Rule: Ordinary and Necessary
The IRS sets a simple two-part test for business expense deductibility: Ordinary: The expense must be "ordinary" — common and accepted in your field of work. A photographer deducting photography equipment is ordinary. A baker deducting a sous chef's salary would be odd. Necessary: The expense must be "necessary" — helpful and appropriate for your business, even if it isn't absolutely essential. A freelance writer doesn't need a MacBook Pro, but a professional designer probably does. Together, these two words — "ordinary and necessary" — define the boundary of legitimate business deductions. It's a broad standard, and the IRS gives taxpayers latitude, which is why tax audits often focus heavily on business expense deductions.
Expense vs. Cost: Not Always the Same Thing
Not every cost you incur is immediately expensed. The critical distinction is between: Revenue Expenditures (Expenses): - Immediate deduction in the year incurred - Benefit consumed within the current period - Examples: rent, utilities, software subscriptions, marketing, professional development Capital Expenditures (Capex): - Must be capitalized and depreciated over time - Benefit extends beyond one year - Examples: purchasing a building, buying equipment, acquiring a business The threshold between the two can be blurry. The IRS generally requires capitalization of assets with useful lives beyond one year, but Section 179 allows immediate expensing of many business assets up to a limit. Your accountant can help you determine which approach maximizes your deductions.
Categories of Business Expenses for Freelancers
1. Advertising and Marketing - Website hosting and domain registration - Online advertising (Google Ads, Facebook Ads) - Business cards and printed materials - Content marketing and SEO tools - Email marketing software (Mailchimp, ConvertKit) 2. Car and Vehicle Expenses Two methods: - Standard Mileage Rate: IRS sets a per-mile rate (67 cents/mile for 2026) for business driving - Actual Expense Method: Track all vehicle costs (gas, insurance, repairs, depreciation) and deduct the business-use percentage You must use the same method for the entire tax year if you have multiple vehicles. 3. Commissions and Contract Labor - Fees paid to subcontractors and 1099 contractors - Sales commissions paid to employees - Processing fees for payment platforms (Stripe, PayPal) - Platform fees (Upwork, Fiverr, Etsy) 4. Employee Benefits (If You Have Employees) - Health insurance premiums for employees - Retirement plan contributions (SEP-IRA, Solo 401(k)) - Workers' compensation insurance - Federal and state unemployment taxes 5. Equipment and Technology - Computers, monitors, peripherals - Software subscriptions (Adobe Creative Cloud, project management tools) - Mobile devices and data plans (business portion) - Cloud storage and SaaS tools - Note: Equipment may be expensed under Section 179 or depreciated 6. Home Office Either: - Simplified Method: $5 per square foot, up to 300 sq ft = $1,500/year max deduction - Regular Method: Actual costs (rent/mortgage interest, utilities, insurance, repairs) × business-use percentage Home office deduction is available only if you use the space exclusively and regularly for business — not for personal use. 7. Insurance - General liability insurance - Professional liability / errors & omissions insurance - Business property insurance - Business interruption insurance - Health insurance (self-employed deduction, not a business expense per se) 8. Interest and Finance Charges - Business credit card interest - Interest on business loans (not personal loans used for business) - Line of credit interest - Note: Points and loan origination fees may need to be amortized 9. Legal and Professional Services - Attorney fees for business matters - Accounting and bookkeeping fees - Consulting fees - Professional association memberships (CFA, bar association, etc.) - NOTE: Personal legal fees (divorce, personal injury) are NOT deductible 10. Office Expenses and Supplies - Printer ink and paper - Postage and shipping - Office furniture under $2,500 (above requires capitalization or Section 179) - Cleaning supplies - Bank fees and merchant processing fees 11. Professional Development - Courses, certifications, and training - Conference attendance fees - Books, subscriptions, and industry publications - Travel for professional development 12. Rent and Lease Expenses - Office space rent - Equipment rental (copiers, vehicles) - Storage unit rental for business inventory - Co-working space memberships 13. Repairs and Maintenance - Routine repairs to business property - Equipment servicing - janitorial services - NOTE: Improvements (which extend useful life or add value) must be capitalized 14. Taxes and Licenses - Business licenses and permits - Real and personal property taxes - State and local income taxes (capped at $10,000 for SALT deduction) - Federal unemployment tax (FUTA) 15. Travel and Entertainment - Transportation (airfare, train, bus, taxi/Rideshare) - Lodging - 50% of business meals (must be business-related) - NOTE: Entertainment expenses (sports tickets, event tickets) are NOT deductible after TCJA 16. Utilities and Communications - Business phone line or mobile plan (business portion) - Internet service (business portion) - Electricity, gas, water for business premises
Non-Deductible Expenses for Freelancers
Not everything you spend for your business is deductible. Common non-deductible items include: Political Contributions — Completely nondeductible, even if your business benefits from political outcomes. Life Insurance Premiums — If you're the beneficiary, premiums are not deductible (except for certain split-dollar arrangements). Personal Legal Fees — Attorney fees for divorce, estate planning, or personal matters. Commuting Expenses — The cost of driving from your home to your regular place of business (unless you have a home office deduction). Entertainment — Tickets to sporting events, concerts, and similar entertainment are not deductible after 2017 TCJA changes. Fines and Penalties — Traffic tickets, regulatory fines, and penalties paid to governments are not deductible. Expenses for Tax-Exempt Income — If income is tax-exempt (e.g., municipal bond interest), related expenses are not deductible. Excessive Compensation — Amounts paid to a spouse or family member must be reasonable for the work performed.
The Timing Question: When Do You Deduct Expenses?
Cash Basis: Expenses are deducted when paid. If you pay your annual software subscription in December, you deduct it in December — even if the coverage runs through next November. Accrual Basis: Expenses are deducted when incurred (when you receive the goods/services), not when paid. If you receive a December invoice but pay it in January, you deducted it in December when you received the service. For most freelancers using Schedule C: The IRS allows cash-basis reporting. However, certain rules (like the "economic performance" test) apply to specific expense categories even on cash basis. Mid-Year vs. Prepaid Expenses: Generally, you can deduct prepaid expenses in the year paid if the benefit period is 12 months or less. If you prepay rent for two years, you must deduct it over the two-year period.
Expense Tracking Best Practices for Freelancers
1. Separate Business and Personal Accounts Open a dedicated business checking account and credit card. Mixing personal and business finances is the #1 reason freelancers have poor expense records and miss deductions. 2. Capture Receipts Immediately Don't let receipts pile up. Use a receipt capture app or simply photograph receipts with your phone the moment you get them. Eonebill lets you attach receipts directly to expense transactions. 3. Categorize Correctly Don't lump everything into "Miscellaneous" or "Other." The IRS and your accountant need to see specific categories. Common Schedule C line items (advertising, car/truck, commissions, insurance, interest, legal/professional fees, office expense, rent, repairs, supplies, taxes, travel, meals, utilities) each have their own line. 4. Track Mileage From Day One Log every business drive immediately. Note: starting point, destination, purpose, and odometer reading. Use a mileage tracking app to avoid the end-of-year scramble. 5. Match Expenses to Income Track which clients/projects generate which expenses. This helps you understand profitability by client — and justifies deductions if the IRS asks. 6. Reconcile Monthly Review your bank and credit card statements against your expense log every month. Catch errors while receipts are fresh.
Common Freelancer Expense Mistakes
Mistake 1: Treating Personal Expenses as Business This is the fastest way to trigger an audit. If you charged your family vacation on your business credit card, you cannot deduct it — even if you "meant to." Separate accounts from day one. Mistake 2: Missing Home Office Deduction Many freelancers who work from home don't take this deduction because it feels complicated. You're leaving real money on the table. Mistake 3: Forgetting Vehicle Mileage If you drive to client sites, meetings, or work-related errands, track your mileage. Even 20 miles a week × 52 weeks × $0.67 = $695 in deductions you might be missing. Mistake 4: Not Capturing Software Subscriptions That $50/month for Adobe Creative Cloud is $600/year. Software subscriptions for business use are legitimate deductions — but only if you track them. Mistake 5: Misclassifying Employees vs. Contractors If you have workers who are employees (control, direction, supervision), their wages trigger payroll taxes. Misclassifying employees as contractors to avoid payroll taxes is illegal and heavily audited.
How Eonebill Helps
Eonebill's Expense Tracker automatically categorizes your business expenses, attaches receipts, and organizes them by IRS Schedule C line items. Instead of scrambling at tax time, your expenses are tracked in real-time throughout the year — with a clear audit trail of receipts and categorizations. The result: fewer missed deductions and less stress on April 15th. Try Eonebill Free → | View Pricing →
Related Terms
- Expense — This page - Income — Revenue, the opposite side of the profit equation - Tax Deduction — How expenses reduce your taxable income - Schedule C — IRS form where freelance expenses are reported - Home Office Deduction — Special deduction for freelancers working from home
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Related Guides
- Freelancer Tax Guide 2026 — Complete guide to deductions and expense tracking - AI Invoice Automation for Freelancer Billing — How AI tools streamline expense and invoice management