Self-employed workers can deduct home office expenses, health insurance premiums, retirement contributions, vehicle costs, business meals, travel, software, and professional services — all on Schedule C (Form 1040). The key phrase is "ordinary and necessary" — the IRS defines this as expenses that are common and accepted in your trade or business and that are helpful and appropriate for it. That covers a lot more than most freelancers realize, and the documentation requirements are where most people fall short.
This post covers the most common Schedule C deductions available to self-employed workers, sole proprietors, and independent contractors in 2026. For each category, we explain what qualifies, what documentation you need to keep, and the mistakes that cause problems in audits.
Before we start: we build a receipt scanning app, not a tax practice. This is general information drawn from IRS publications, revenue procedures, and Schedule C instructions. It is not tax advice. Tax law changes, your situation is specific, and a qualified CPA or enrolled agent is the right person to advise you. What follows is a reference guide, not a substitute for professional counsel.
1. Home office deduction
The home office deduction is reported on Form 8829 (or as a line item if you use the simplified method) and flows to Schedule C, Line 30. It is one of the most valuable deductions available to self-employed workers, and also one of the most misunderstood.
What qualifies: To claim the home office deduction, the space must be used regularly and exclusively for business. This is the "exclusive use test" — the area you claim cannot double as a guest bedroom or a dining table you also eat at. It must be your principal place of business, or a place where you regularly meet clients. A dedicated room works cleanly. A partitioned area of a room can also qualify, but mixed-use spaces do not.
Two methods: The IRS offers two ways to calculate this deduction. The simplified method lets you deduct $5 per square foot of your home office, up to 300 square feet, for a maximum of $1,500 per year. No need to track actual expenses. The actual expense method requires you to calculate the business-use percentage of your home (usually square footage of office divided by total square footage) and apply that percentage to your actual home expenses: mortgage interest or rent, utilities, insurance, repairs, and depreciation. The actual method often yields a larger deduction but requires significantly more recordkeeping.
What to document: Measurements of your office space and total home. For the actual method: mortgage statements, rent receipts, utility bills, insurance premiums, and repair invoices. Keep these organized by year.
Common mistake: Claiming a space that does not meet the exclusive use test. If your "office" is the kitchen table, the deduction does not apply. The IRS is familiar with this one.
2. Self-employed health insurance deduction
This is an adjustment to income on Schedule 1 (Form 1040), Line 17 — not a Schedule C deduction, technically, but it directly reduces your adjusted gross income, which is often better. Self-employed individuals who are not eligible for an employer-subsidized health plan (including through a spouse's employer) can deduct 100% of health insurance premiums for themselves, their spouse, and their dependents.
What qualifies: Medical, dental, and qualifying long-term care insurance premiums. The deduction cannot exceed your net self-employment income for the year. If you had a loss, you cannot take this deduction.
What to document: Premium payment records, Form 1095 if applicable, and documentation that you were not eligible for employer-sponsored coverage during the months you claim.
Common mistake: Claiming this deduction for months when you were eligible for a spouse's employer plan, even if you did not enroll. Eligibility, not enrollment, is the test.
3. Retirement contributions
Self-employed workers have access to several retirement account types, each with different contribution limits and rules. Contributions to these plans are generally deductible and reduce your taxable income.
SEP-IRA: Allows contributions of up to 25% of net self-employment earnings. Contribution limits are adjusted annually by the IRS. Simple to set up, no employee paperwork if you have no employees.
Solo 401(k): Also called an individual 401(k). Allows both employee deferrals and employer profit-sharing contributions, which can result in higher total contributions than a SEP-IRA for many self-employed workers. The employee deferral limit and total contribution limit are set annually by the IRS. Available only if you have no employees (other than a spouse).
SIMPLE IRA: Designed for small businesses with fewer than 100 employees. Lower contribution limits than a SEP or Solo 401(k), but simpler administration. The annual deferral limit is set by the IRS and typically includes a catch-up contribution allowance for those 50 and older.
Note: contribution limits change every year based on IRS cost-of-living adjustments. Check IRS.gov or consult your tax professional for the current year's limits before making contributions.
What to document: Account statements, contribution confirmations, and proof of the plan's establishment date (relevant for Solo 401(k) plans, which must be established by December 31 of the tax year).
Common mistake: Contributing more than the allowed limit based on net self-employment income, or missing the deadline. SEP-IRA contributions can be made until your tax filing deadline (including extensions), but the Solo 401(k) employee deferral must be made by December 31.
4. Self-employment tax deduction
This one is automatic but worth understanding. Self-employed individuals pay both the employer and employee portions of Social Security and Medicare taxes — that is the self-employment tax calculated on Schedule SE. The IRS allows you to deduct the employer-equivalent portion (50% of your self-employment tax) as an adjustment to income on Schedule 1.
What qualifies: 50% of the self-employment tax you owe. This is calculated on Schedule SE and transferred to Schedule 1. You do not need to itemize to take this deduction.
What to document: Schedule SE is the documentation. This deduction is formulaic — it is computed from your net self-employment income.
Common mistake: There is no common mistake here because the calculation is built into the tax forms. But many self-employed workers do not realize this deduction exists, which means they overestimate their effective tax rate when planning.
5. Business vehicle expenses
If you use a vehicle for business, you can deduct the business-use portion of your vehicle costs. This appears on Schedule C, Line 9 (car and truck expenses). The IRS gives you two methods.
Standard mileage rate: The IRS sets a per-mile rate each year. You multiply your business miles by this rate. The rate changes annually and is published on IRS.gov, typically in late December for the following year. This method is simpler and often better for vehicles with lower operating costs.
Actual expense method: You track all vehicle costs — gas, insurance, repairs, depreciation, lease payments, registration — and deduct the business-use percentage. This method requires more recordkeeping but may yield a larger deduction for expensive vehicles or those with high operating costs.
What to document: A contemporaneous mileage log is critical. Record the date, destination, business purpose, and miles driven for every business trip. The IRS is specific about this — a log reconstructed at year-end from memory does not satisfy the requirement. For the actual expense method, keep all receipts for gas, repairs, insurance, and other vehicle costs. ScanLens's tagging feature makes it easy to tag vehicle receipts by category as you scan them, so they are organized for tax time.
Common mistake: Not keeping a mileage log. This is probably the single most common documentation failure in Schedule C audits. Commuting miles (home to your regular office) are not deductible. Trips from your home office to a client site are.
6. Professional development
Expenses for education and training that maintain or improve skills required in your current business are deductible on Schedule C. This includes courses, workshops, certifications, conferences, and related materials.
What qualifies: The education must relate to your current trade or business. A freelance web developer taking an advanced JavaScript course qualifies. That same developer getting a law degree generally does not — it qualifies you for a new trade, which is a different tax situation. Industry conferences, professional certifications, and continuing education credits all typically qualify.
What to document: Registration receipts, course descriptions, certificates of completion, and travel expenses related to attending (which are separately deductible as business travel). Keep a record of how the education relates to your business.
Common mistake: Deducting education that qualifies you for a new profession rather than improving skills in your current one. The IRS draws this line clearly.
7. Business insurance
Premiums for insurance directly related to your business are deductible on Schedule C, Line 15. This is separate from health insurance (covered above).
What qualifies: Professional liability insurance (errors and omissions), general liability insurance, business property insurance, cyber liability insurance, and professional indemnity coverage. If you work from home, the business portion of renter's or homeowner's insurance can be claimed through the home office deduction instead.
What to document: Insurance policy documents and premium payment records.
Common mistake: Double-counting insurance that is already captured in the home office deduction calculation.
8. Office supplies and equipment (Section 179)
Office supplies go on Schedule C, Line 22. Equipment and larger purchases may be expensed under Section 179 of the Internal Revenue Code or depreciated over time.
What qualifies: Supplies include paper, ink, pens, postage, and similar consumables. Equipment includes computers, printers, desks, chairs, monitors, and other tangible business property. Under Section 179, you can elect to deduct the full purchase price of qualifying equipment in the year you buy it, rather than depreciating it over several years. The annual Section 179 limit is set by the IRS and is typically well above what most sole proprietors spend.
What to document: Receipts for every purchase. For equipment, keep the receipt showing the purchase date and price, and note the business-use percentage if the item is also used personally. Digital receipts are fully accepted by the IRS — scanning your paper receipts with ScanLens and organizing them by category is the most reliable way to keep these records.
Common mistake: Claiming 100% business use on a laptop or phone that is also used personally. If you use it 70% for business, deduct 70%. The IRS expects honest allocation.
9. Software and subscriptions
Business software and subscription services are deductible on Schedule C, typically under Line 18 (office expense) or Line 27a (other expenses).
What qualifies: Accounting software, project management tools, cloud storage, design software, website hosting, domain registrations, email services, and any other software or SaaS subscription used for business. This also includes app subscriptions directly related to your work — a photographer's Lightroom subscription, a writer's grammar tool, a freelancer's invoicing app.
What to document: Subscription receipts or billing statements. If a subscription is shared between personal and business use, document the business-use percentage.
Common mistake: Forgetting to deduct small monthly subscriptions that add up over a year. A $15/month tool is $180/year. Track them all.
10. Professional services
Fees paid to other professionals for business services are deductible on Schedule C, Line 17 (legal and professional services).
What qualifies: Accounting and bookkeeping fees, tax preparation fees (the portion related to your business), legal fees for business matters, consulting fees, and fees paid to other contractors for business services. If you hire a CPA to prepare your Schedule C, that fee is deductible. If you hire a lawyer to review a client contract, that fee is deductible.
What to document: Invoices from the professionals you hire. If your tax preparer charges a single fee for your entire return, get an allocation between the personal and business portions.
Common mistake: Not deducting tax preparation fees related to business. Many freelancers pay for professional tax preparation and forget to deduct the business portion.
11. Business meals
Business meals are deductible at 50% on Schedule C, Line 24b. This applies to meals with clients, prospects, or business associates where business is discussed.
What qualifies: Meals where business is the primary purpose of the meeting. The meal cannot be "lavish or extravagant" by IRS standards, though the threshold for this is higher than most people assume. You must be present at the meal. Groceries for your home office are generally not deductible; meals while traveling for business are (at 50%).
What to document: This is where documentation matters most. For each business meal, record: the amount, the date, the place (restaurant name), the business purpose, and the names of the people present. A receipt alone is not enough — you need the context. A receipt scanning workflow that lets you add notes to each scan is the most practical way to capture this in real time.
Common mistake: Missing the documentation of who was at the meal and what was discussed. The IRS does not require a transcript, but a brief note like "lunch with [client name], discussed Q2 project scope" is what they want to see.
12. Travel expenses
Business travel expenses are deductible on Schedule C, Line 24a. Travel means you are away from your "tax home" (the city or area where your principal place of business is located) for longer than a normal workday and you need to sleep or rest to meet the demands of the trip.
What qualifies: Airfare, train or bus tickets, hotel or lodging, rental cars, taxis and rideshares, baggage fees, tips related to travel services, and meals while traveling (at 50%). The trip must be primarily for business. If you extend a business trip for personal vacation days, you can only deduct the expenses for the business portion.
What to document: Receipts for each expense, plus a record of the business purpose of the trip, the dates of travel, and the destinations visited. A conference agenda or client meeting invitation is good supporting documentation. For trips that mix business and personal days, document which days were business days and which were not.
Common mistake: Claiming an entire trip as business when only part of it was. If you fly to a city for a two-day conference and stay three extra days for vacation, the airfare is still deductible (the primary purpose was business), but lodging and meals for the personal days are not.
13. Internet and phone (business-use percentage)
The business-use portion of your internet and phone bills is deductible, typically reported on Schedule C under Line 25 (utilities) or Line 27a (other expenses).
What qualifies: If you use your home internet connection and personal cell phone for business, you can deduct the percentage attributable to business use. If you have a separate business phone line, the full cost of that line is deductible. The key is reasonable allocation — if you estimate that 60% of your phone usage is business-related, you deduct 60% of the bill.
What to document: Monthly bills and a reasonable basis for your business-use percentage. You do not need to log every call or browsing session, but you should be able to explain your allocation method if asked. A consistent percentage applied throughout the year is more defensible than one that changes monthly without reason.
Common mistake: Claiming 100% business use on a personal phone or internet connection that is clearly also used for personal purposes. The IRS expects a reasonable percentage, and claiming 100% invites scrutiny.
The deduction itself is rarely the problem in an audit. The problem is almost always documentation — either missing records, or records that do not contain the information the IRS requires.
Keeping records that survive an audit
The recurring theme across every deduction listed above is documentation. The IRS expects you to substantiate each deduction with records showing the amount, date, and business purpose. For some categories (meals, travel, vehicle), the documentation requirements are more specific.
The most practical approach for self-employed workers: scan every receipt when you get it, add a note with the business purpose, and organize by category. ScanLens is built for this workflow — on-device OCR, tagging by expense category, and cloud backup so your records survive even if your phone does not. But whatever tool you use, the important thing is to capture receipts in real time. A shoebox of faded thermal paper at year-end is how deductions get lost.
Keep your records for at least three years from filing — longer if you want the safety margin. Our guide to digital receipts and the IRS covers the retention rules in detail.
This post is general information about common Schedule C deductions, drawn from publicly available IRS publications and form instructions. It is not tax advice, and it is not a substitute for professional guidance. Tax law changes. Deduction limits change. Your situation is specific. Work with a qualified tax professional — a CPA or enrolled agent — to determine what deductions apply to you and how to claim them correctly.
Related reading
If this post is useful, you may also find these helpful:
- Are Digital Receipts Accepted by the IRS? A 2026 Guide — the legal basis for scanned receipts and how long to keep them
- Tax Season Receipt Scanning: The Complete Workflow — the year-round workflow for self-employed filers and small businesses
- How to Organize Digital Documents — the folder and naming conventions that hold up over time
