Self-employed allowable expenses cover any cost that is both ordinary and necessary for running your business, from mileage and a home office to health insurance, retirement contributions, and half of your self-employment tax. Every deduction reduces the income the IRS taxes, and several of the biggest ones sit outside Schedule C entirely, which is why they get missed. Here is what qualifies, what does not, and how to keep the records that make each deduction stick.
The Ordinary and Necessary Test
Every deduction starts with one question. Under federal tax law, an ordinary expense is one that is common and accepted in your line of work, and a necessary expense is one that is appropriate and helpful to your business.1eCFR. 26 CFR 1.162-1 – Business Expenses The expense does not have to be indispensable. It just has to serve a real business purpose rather than a personal one.
A freelance graphic designer buying a drawing tablet clears both hurdles easily. The same designer deducting a family vacation does not, even after answering one client email from the hotel. When an expense straddles the line, only the business share is deductible, and you need to show how you split it. A laptop used 70% for work and 30% for personal browsing yields a 70% deduction, not the full amount.
Vehicle and Travel Costs
Vehicle expenses are one of the largest deductions for many self-employed people. The IRS gives you two ways to calculate them.
The standard mileage rate for 2026 is 72.5 cents per mile.2Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents Drive 15,000 business miles and you deduct $10,875 with no need to save gas receipts. The alternative is the actual expense method: total your real costs for gas, oil, repairs, tires, insurance, registration, and depreciation, then multiply by the business-use percentage.3Internal Revenue Service. Topic No. 510, Business Use of Car If you want the standard rate, you must use it in the first year the vehicle is available for business. For leased vehicles, once you pick the standard rate, you stay with it for the life of the lease.
One rule catches people out constantly: commuting from home to a regular workplace is never deductible, no matter the distance.4Internal Revenue Service. Travel and Entertainment Expenses Frequently Asked Questions If your home office is your principal place of business, though, trips from there to a client site count as business miles.
Travel away from home for business opens up airfare, train tickets, car rentals, lodging, and 50% of meal costs.5Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses The trip has to keep you away from your tax home substantially longer than a normal workday.
Home Office
If you use part of your home exclusively and regularly as your main place of business, you can deduct a portion of your housing costs.6Office of the Law Revision Counsel. 26 U.S. Code 280A – Disallowance of Certain Expenses in Connection With Business Use of Home The word to focus on is “exclusively.” A desk in a room that doubles as a guest bedroom does not qualify. A converted spare room used only for work does.
Two methods are available. The simplified method deducts $5 per square foot up to 300 square feet, capped at $1,500, with no tracking of individual bills.7Internal Revenue Service. Rev. Proc. 2013-13 The regular method applies your office’s share of home square footage to actual costs: rent or mortgage interest, property taxes, utilities, homeowner’s insurance, and repairs. A 200-square-foot office in a 2,000-square-foot home means you deduct 10% of those costs. The regular method takes more work but usually produces the bigger deduction. Under either method, the home office deduction generally cannot exceed the gross business income from that space.
Health Insurance
Self-employed people can deduct 100% of premiums paid for medical, dental, and vision insurance covering themselves, a spouse, dependents, and children under 27.8Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses – Section: (l) This is an above-the-line deduction, so it reduces adjusted gross income whether you itemize or not.
Two restrictions apply. The deduction cannot exceed net self-employment income from the business under which the plan is established, and you cannot claim it for any month you were eligible to join a subsidized employer plan, including through a spouse. Long-term care premiums also qualify, but only up to age-based limits that adjust for inflation each year.
Business Insurance
Premiums to insure your business operations are ordinary expenses. That covers liability coverage, malpractice or professional liability (errors and omissions), fire and theft, business interruption, workers’ compensation, and vehicle insurance for business-use vehicles.9Internal Revenue Service. Publication 334 – Tax Guide for Small Business If a policy covers both personal and business use, only the business share qualifies.
Retirement Contributions
Retirement contributions shelter income now and build long-term savings, which makes them one of the most powerful tools available. Three plans dominate for the self-employed.
A SEP IRA lets you contribute up to 25% of net self-employment earnings (after the deduction for half of self-employment tax), capped at $72,000 for 2026.10Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) Setup is simple and contributions are flexible year to year.
A Solo 401(k) combines an employee deferral of up to $24,500 in 2026 with an employer profit-sharing contribution of up to 25% of compensation, capped at $72,000 total for those under 50. Catch-up contributions add more for older savers. The Solo 401(k) is generally the strongest option for high earners because the employee deferral shelters more income at lower earnings levels than a SEP alone.
A SIMPLE IRA allows employee deferrals up to $17,000 in 2026 with catch-up contributions for those 50 and older, and it requires either a 3% employer match or 2% nonelective contribution.11Internal Revenue Service. Retirement Topics – SIMPLE IRA Contribution Limits
SEP and Solo 401(k) contributions go on Schedule 1 of Form 1040, not Schedule C, but they still reduce adjusted gross income and your overall tax bill.
Half of Your Self-Employment Tax
Self-employed individuals pay both the employer and employee shares of Social Security and Medicare, a combined 15.3% on net earnings: 12.4% for Social Security and 2.9% for Medicare.12Office of the Law Revision Counsel. 26 U.S. Code 1401 – Rate of Tax Social Security applies to the first $184,500 of net self-employment income in 2026; Medicare applies to all of it. An additional 0.9% Medicare surtax kicks in on self-employment income above $200,000 for single filers or $250,000 for joint filers.
You deduct half of the regular self-employment tax (not the 0.9% surtax) directly from gross income, whether or not you itemize.13Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes On $100,000 of net self-employment income, that’s roughly $7,065 off your adjusted gross income. New freelancers miss this often because it doesn’t appear on Schedule C. It goes on Schedule 1.
Qualified Business Income Deduction
Sole proprietors and other pass-through owners may deduct up to 20% of qualified business income under Section 199A.14Office of the Law Revision Counsel. 26 U.S. Code 199A – Qualified Business Income For 2026, the deduction is straightforward for single filers with taxable income below $201,750 and joint filers below $403,500.15Internal Revenue Service. Rev. Proc. 2025-32 Above those thresholds the deduction phases out for specified service businesses such as consulting, law, and accounting.
If your Schedule C shows $80,000 in net profit and you’re under the threshold, you could deduct up to $16,000. This deduction was introduced by the Tax Cuts and Jobs Act and was scheduled to expire after 2025, so confirm its current status when filing your 2026 return. It reduces income tax only, not self-employment tax.
Equipment, Software, and Section 179
Small tools and office supplies get deducted the year you buy them. Computers, furniture, and other assets that last beyond a year are normally depreciated over several years based on their class life.16Internal Revenue Service. Topic No. 704, Depreciation
Section 179 offers a shortcut. You can elect to deduct the full cost of qualifying assets in the year you place them in service instead of spreading the deduction over years. The 2026 ceiling of $2,560,000 is far above what a one-person operation spends, so in practice the cap rarely matters. What does matter: your Section 179 deduction cannot exceed your taxable business income for the year, and any excess carries forward.17Office of the Law Revision Counsel. 26 U.S. Code 179 – Election to Expense Certain Depreciable Business Assets
Software subscriptions, cloud storage, and SaaS tools you use for business are current-year deductions rather than depreciable assets, because you don’t own them outright. Leased equipment follows the same rule.
Professional Services and Education
Fees paid to attorneys for contract work, accountants for business tax preparation, bookkeepers, and business consultants are deductible when the services relate to your business. Schedule C includes a “legal and professional services” line for these.18Internal Revenue Service. 2025 Schedule C (Form 1040) A CPA handling your business return counts; the same CPA handling your personal estate planning does not.
Education qualifies when it maintains or improves skills your current trade already requires. A licensed therapist attending a continuing-education seminar can deduct tuition, books, and related travel. Training that qualifies you for a new profession does not qualify, even when the skills overlap with what you do now.
Marketing, Memberships, and Subscriptions
Costs to attract and retain customers are deductible: digital ad campaigns, website hosting and design, business cards, print ads, and professional photography for portfolios or catalogs. Whether you pay a designer or use a subscription site builder, the cost counts.
Dues to professional associations and trade organizations tied to your field are deductible, along with industry publications and journals. A chamber of commerce membership qualifies. Initial admission fees to certain clubs are treated as capital expenses and don’t work as current-year dues. Country club and social club dues are never deductible, regardless of how much networking happens there.
Phone, Internet, and Utilities
Personal phone and home internet used for business are deductible at the business-use percentage. A separate work-only line or device is 100% deductible. For a shared phone, you need a reasonable method to estimate the business share, such as reviewing call logs or tracking usage by time.
Home utilities like electricity, heating, and water are deductible through the home office regular method. If you rent a separate commercial space, the full utility bill for that space is a straightforward deduction.
Business Interest, Taxes, and Licenses
Interest on loans used for business is deductible: business credit card balances, a line of credit used for inventory, or a loan to buy equipment. If you take out a personal loan and use part of it for business, only the business share of the interest qualifies.
State and local taxes tied to business operations belong on Schedule C: state income or gross receipts taxes on business earnings, sales tax paid on business purchases, and personal property tax on business assets. Business license fees, regulatory permits, and annual filing fees to keep the business in good standing sit on the same “taxes and licenses” line.18Internal Revenue Service. 2025 Schedule C (Form 1040)
What You Cannot Deduct
Some expenses look deductible but are not:
- Daily commuting between home and a regular workplace, however far the drive.
- Everyday clothes you wear to work, even when purchased specifically for the job. Required uniforms or specialized protective gear can qualify.
- Hobby expenses, when the IRS decides your activity lacks a profit motive.
- Courses that qualify you for a completely different profession, even when the material overlaps with your current work.
- Lavish or extravagant purchases that go well beyond what your industry treats as reasonable.
- Your own federal income tax payments.
Anything with a mixed purpose gets prorated. The personal portion never counts.
Records You Need to Keep
Federal law requires every taxpayer to keep records sufficient to support the return.19Office of the Law Revision Counsel. 26 U.S. Code 6001 – Notice or Regulations Requiring Records, Statements, and Special Returns For self-employed people, that means receipts, bank statements, invoices, and mileage logs showing the date, amount, and business purpose behind each deduction. A credit card line reading “supplies” is not enough. You need to show what you bought and why it was for business.
Retention periods vary:20Internal Revenue Service. How Long Should I Keep Records
- Three years from filing is the standard.
- Six years if you omitted more than 25% of gross income from a return.
- Seven years for bad debt or worthless securities deductions.
- Indefinitely if you never filed or filed a fraudulent return.
- Property records stay until the statute of limitations runs on the year you sell or dispose of the asset.
Weak records cost real money. An accuracy-related penalty of 20% applies to any underpayment caused by negligence or substantial understatement of income.21Internal Revenue Service. Accuracy-Related Penalty Falsifying records intentionally becomes fraud, with much steeper fines and possible criminal charges. Three years of organized files costs almost nothing next to the price of losing deductions you already earned.