Independent consultants can write off the ordinary and necessary costs of running the business, and those consulting tax deductions cut both income tax and self-employment tax at the same time. That covers software, insurance, a home office, travel, equipment, health premiums, retirement contributions, and more, with a separate 20% deduction on qualified business income available at lower income levels.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses What follows is what qualifies, where the limits sit, and the records you need to keep any of it.
How Your Structure Changes the Paperwork, Not the Deductions
The deductions available to a consultant are largely the same whether you operate as a sole proprietor, single-member LLC, partnership, or S corporation. What changes is the form. Sole proprietors and single-member LLCs report income and expenses on Schedule C.2Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship) Partnerships and multi-member LLCs file Form 1065 and pass results through on Schedule K-1.3Internal Revenue Service. About Form 1065, U.S. Return of Partnership Income An S corporation files Form 1120-S and distributes results the same way.4Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation The write-offs below apply across all of them.
Everyday Operating Expenses
The governing standard is broad: any cost that is ordinary (common in consulting) and necessary (helpful and appropriate) qualifies.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses In a consulting practice, that pulls in most of what you actually spend money on.
Fees to your accountant for tax prep, bookkeeping, or financial planning are deductible. So are legal fees for contracts, formation, or disputes; if an attorney’s invoice mixes business and personal matters, only the business share counts. Premiums for general liability, professional liability, and cyber insurance are fully deductible. Licensing fees and annual state registration to maintain your entity qualify as operating expenses.
Continuing education is deductible when it maintains or improves skills you already use, which covers webinars, conferences, professional certifications, and industry publications. Education that qualifies you for a new profession does not qualify, even when it relates to your current field.
Office supplies, postage, software subscriptions, cloud storage, industry-specific platforms, website hosting, paid ads, and print marketing all deduct in full. Subcontractor payments are deductible too, and you’ll need to issue a 1099 for anyone you paid $600 or more during the year.
The Home Office Deduction
If you work from home, you can deduct a share of your housing costs, but the space has to be used exclusively and regularly as your principal place of business.5Internal Revenue Service. Publication 587, Business Use of Your Home “Exclusive” is strict. A spare bedroom used only for client work qualifies. A dining table where the family also eats does not. A space used exclusively and regularly to meet clients also qualifies, even if you have another work location.
Simplified Method
The simplified method is $5 per square foot, capped at 300 square feet, for a maximum of $1,500 per year.6Internal Revenue Service. FAQs – Simplified Method for Home Office Deduction No utility tracking, no depreciation. For a small workspace and modest housing costs, it’s often the sensible pick.
Actual Expense Method
The actual expense method usually yields more. Divide your office square footage by the total square footage of your home; that percentage applies to rent or mortgage interest, property taxes, homeowner’s insurance, utilities, repairs, and home depreciation.7Internal Revenue Service. Simplified Option for Home Office Deduction A 200-square-foot office in a 2,000-square-foot home yields a 10% deduction against those costs.
Phone and Internet
Your phone and internet are partially deductible under either method. A dedicated business line is fully deductible. For a personal line used for business, deduct the business-use percentage. Claiming 100% of a personal phone won’t hold up in an audit; a reasonable estimate supported by some documentation will.
Travel, Vehicles, and Meals
Business travel is deductible when you’re away from your tax home long enough to need sleep or rest.1Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses Airfare, lodging, rental cars, taxis and rideshares, tips, and baggage fees all qualify. On a mixed business-personal trip, the airfare is deductible if business was the primary purpose, but hotel nights and meals tied to the personal days are not.
Vehicle Costs
For a personal vehicle used for business, you have two options. The standard mileage rate for 2026 is 72.5 cents per mile.8Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Multiply by business miles and deduct the result. The alternative is tracking actual costs — gas, insurance, maintenance, depreciation, registration — and deducting the business-use percentage. Either way, you need a mileage log with the date, start point, destination, and business purpose of each trip. Commuting between home and a regular office isn’t business mileage.
Meals
Business meals deduct at 50%, provided there’s a clear business purpose and you or an employee are present.9Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses That covers meals with clients and meals eaten alone while traveling for work. The meal cannot be lavish or extravagant.10Internal Revenue Service. Income and Expenses 2
Entertainment is a different rule. Sporting events, concerts, golf outings, and similar activities are fully nondeductible, even when tied directly to a business discussion.9Office of the Law Revision Counsel. 26 USC 274 – Disallowance of Certain Entertainment, Etc., Expenses Club dues for social, athletic, or sporting organizations don’t qualify either. One narrow exception: food and beverages at an entertainment event can still deduct at 50% if the receipt separates them from the entertainment charge. You can’t back into the split later.
Equipment and Technology
Laptops, monitors, printers, office furniture, and specialized equipment are deductible. Technically, anything with a useful life beyond one year must be capitalized and depreciated, but two provisions let most consultants deduct the full cost in the year of purchase.
Section 179
Section 179 lets you expense qualifying equipment in the year you buy it.11Internal Revenue Service. Publication 946 – How To Depreciate Property The 2026 limit is $2,560,000, with a phase-out starting when total equipment purchases exceed $4,090,000. Those ceilings sit far above what a solo practice will hit, so nearly every consulting equipment purchase qualifies for immediate expensing.
Bonus Depreciation
Bonus depreciation offers a 100% first-year deduction for qualified property acquired after January 19, 2025, under legislation signed in 2025.12Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill The rate had been scheduled to drop to 20% in 2026 before the law changed. The restored 100% is now permanent. For most consulting equipment, Section 179 and bonus depreciation produce the same result, though bonus depreciation also applies to used property and isn’t limited by taxable income the way Section 179 is.
Self-Employed Health Insurance
Premiums for medical, dental, and vision coverage for you, your spouse, and your dependents are deductible, along with qualified long-term care premiums. This isn’t a Schedule C expense. It’s an adjustment to income on Schedule 1, calculated on Form 7206.13Internal Revenue Service. Instructions for Form 7206 – Self-Employed Health Insurance Deduction
The eligibility rule catches people. You can’t claim the deduction for any month you were eligible to participate in an employer-subsidized plan, including through a spouse’s employer.14Internal Revenue Service. Form 7206 – Self-Employed Health Insurance Deduction Eligibility disqualifies you even if you didn’t enroll. The deduction also can’t exceed your net self-employment income from the business under which the plan sits.
Retirement Contributions
Retirement contributions are among the largest deductions a consultant can take, and they build actual retirement savings at the same time. Two plans dominate.
SEP IRA
A SEP IRA takes up to 25% of your net self-employment earnings, capped at $72,000 for 2026.15Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) Setup is simple and paperwork is light. All contributions are employer contributions, so there’s no separate employee deferral on top.
Solo 401(k)
A solo 401(k) is available if you have no employees other than a spouse. You can defer up to $24,500 as the employee side in 2026, plus profit-sharing contributions of up to 25% of net earnings, combined maximum $72,000. At age 50 or older, an additional $8,000 catch-up raises the cap to $80,000. Roth contributions are an option in a solo 401(k); they aren’t in a SEP.
Half of Your Self-Employment Tax
Self-employment tax covers your Social Security and Medicare contributions, and as a consultant you pay both halves for a combined 15.3% — 12.4% Social Security on earnings up to $184,500 in 2026, plus 2.9% Medicare on all earnings.16Internal Revenue Service. 2026 Publication 15-A17Social Security Administration. Contribution and Benefit Base The tax applies to 92.35% of net self-employment earnings.18Internal Revenue Service. Schedule SE (Form 1040)
You then deduct half of the self-employment tax as an adjustment to gross income on your personal return, whether or not you itemize.19Internal Revenue Service. Topic No. 554, Self-Employment Tax On $150,000 of net profit, that’s roughly a $10,600 deduction. Every other business deduction in this article also lowers the base on which self-employment tax is calculated, so each write-off does double work.
The 20% QBI Deduction
The Section 199A qualified business income deduction lets eligible self-employed individuals deduct up to 20% of their qualified business income on top of everything else. It sits on your personal return, not Schedule C, and it doesn’t reduce self-employment tax.
Here’s the boundary consultants have to watch. Consulting is a “specified service trade or business” under the tax code, which means the deduction phases out at higher incomes and disappears above a ceiling.20eCFR. 26 CFR 1.199A-5 – Specified Service Trades or Businesses and the Trade or Business of Performing Services as an Employee For 2026, the phase-out starts near $200,000 for single filers and around $400,000 for married filing jointly (both indexed to inflation). Below those thresholds, you get the full 20% with no extra math. Above the phase-out range, a consultant loses the deduction entirely.
At moderate incomes, the QBI deduction is often the biggest line item on the return. A consultant with $120,000 in qualified business income deducts $24,000, worth several thousand dollars in tax.
Startup and Organizational Costs
If you launched recently, up to $5,000 of startup costs is deductible in the year the business begins, with a separate $5,000 for organizational costs like LLC filing fees and formation legal work.21eCFR. 26 CFR 1.195-1 – Election to Amortize Start-Up Expenditures Startup costs cover market research, pre-opening advertising, travel to find clients, and training before operations begin.
Each $5,000 phases out dollar-for-dollar once costs in that category exceed $50,000. At $55,000, the immediate deduction is gone. Anything you can’t deduct up front amortizes over 180 months, starting the month you begin business.
Records That Hold Up
A deduction you can’t prove is a deduction you lose. For each expense the IRS wants documentation of what, when, where, and why: receipts, business purpose, and the relationship of anyone involved in a meal or meeting. A credit card statement without the itemized receipt usually isn’t enough.
Mileage logs are a common audit fight. Each entry needs the date, starting location, destination, business purpose, and miles driven. Reconstructing a year of driving from memory in April rarely survives scrutiny.
A few habits handle most of the record-keeping burden. Run a dedicated business bank account and credit card so transactions separate themselves. Use accounting or expense-tracking software to categorize as you go. Photograph paper receipts on the spot, because thermal paper fades within months.
Estimated Taxes and Timing
Nobody’s withholding from your consulting income, so the IRS expects quarterly estimated payments covering both income tax and self-employment tax, due April 15, June 15, September 15, and January 15 of the following year. Underpaying triggers an interest-based penalty. You avoid it if the total owed at filing is under $1,000, or if you pay in at least 90% of the current year’s tax or 100% of the prior year’s (110% if your AGI topped $150,000).22Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty Every deduction in this article lowers what you owe each quarter, so tracking write-offs in real time also keeps your estimated payments accurate.