Schedule C Business Deductions 2026: The Complete Write-Off List

Quick Answer: Schedule C Business Deductions in 2026

If you are self-employed, Schedule C is where business expenses turn into tax savings. You can deduct any expense that is ordinary and necessary for your work, then report the net profit on Form 1040.

The 2026 tax year brings real changes. The One Big Beautiful Bill Act (P.L. 119-21) made the qualified business income (QBI) deduction permanent and raised it to 23%, made 100% bonus depreciation permanent, and set the business standard mileage rate at 72.5 cents per mile.

This guide walks through the full deduction list mapped to actual Schedule C Part II line numbers, plus the 2026-specific updates that most write-off articles miss.

What Is Schedule C and Who Files It in 2026?

Schedule C (Profit or Loss from Business) is the form sole proprietors use to report business income and expenses. Your net profit or loss flows to Form 1040 and to Schedule SE, which calculates self-employment tax.

You file Schedule C if you run an unincorporated business as a:

Sole proprietor
Single-member LLC (treated as a disregarded entity)
1099 independent contractor or freelancer
Gig worker (rideshare, delivery, freelance platforms)

The legal standard for every deduction comes from IRC Section 162. The expense must be ordinary (common and accepted in your trade) and necessary (helpful and appropriate for your business). It does not have to be indispensable, but it does have to be real, documented, and business-related.

Reasonable business expenses lower your net profit, which lowers both your income tax and your 15.3% self-employment tax. That double benefit is why tracking deductions carefully matters more for the self-employed than for W-2 employees.

What Changed for the 2026 Tax Year

Several updates take effect for tax years beginning after December 31, 2025. They come straight from the One Big Beautiful Bill Act and IRS guidance.

QBI deduction made permanent and raised to 23%

The qualified business income deduction under Section 199A was scheduled to expire after 2025. The OBBB made it permanent and increased it from 20% to 23% of qualified business income.

The phase-in ranges for specified service businesses were also widened, to $75,000 (single) and $150,000 (joint). There is also a new floor: a minimum $400 QBI deduction for taxpayers with at least $1,000 of QBI from a business in which they materially participate.

100% bonus depreciation made permanent

Bonus depreciation lets you write off the full cost of qualifying equipment in the year you place it in service. It had been phasing down. The OBBB restored and made permanent 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025.

Higher Section 179 expensing cap

Section 179 also lets you expense equipment up front instead of depreciating it over years. The annual dollar cap went up for 2026. Confirm the exact figure against current IRS Section 179 guidance (Publication 946) before you file, since it is inflation-adjusted each year.

Business mileage rate up to 72.5 cents

The IRS set the 2026 business standard mileage rate at 72.5 cents per mile, up 2.5 cents from 2025. The depreciation portion of that rate is 35 cents per mile, which matters when you later sell the vehicle.

New above-the-line deductions

The OBBB added deductions for qualified tips, qualified overtime, and car loan interest. These go on Form 1040, not Schedule C, but they can still cut the tax bill of a self-employed filer who also has wage income.

The Complete Schedule C Deduction List (by Part II Line)

Part II of Schedule C is where expenses go. Here is the line-by-line list of what you can deduct.

Line 8 — Advertising. Website costs, online ads, business cards, sponsorships, printed flyers, logo design.
Line 9 — Car and truck expenses. Either the standard mileage rate (72.5 cents in 2026) or actual costs. More on this below.
Line 10 — Commissions and fees. Referral fees, sales commissions, platform commissions.
Line 11 — Contract labor. Payments to independent contractors and freelancers you hire (issue them a 1099-NEC if you pay $600 or more).
Line 12 — Depletion. Applies mainly to natural resource businesses.
Line 13 — Depreciation and Section 179. The deduction for equipment, vehicles, and other assets, including bonus depreciation and Section 179 expensing.
Line 14 — Employee benefit programs. Health and benefit plans for employees (not for yourself as the owner).
Line 15 — Insurance. Business liability, property, malpractice, and errors-and-omissions coverage. Your own health insurance goes elsewhere (see below).
Line 16 — Interest. Mortgage interest on business property (16a) and other business loan or credit card interest (16b).
Line 17 — Legal and professional services. Attorneys, accountants, bookkeepers, and tax preparation fees for the business portion of your return.
Line 18 — Office expense. Postage, printer ink, paper, and general office consumables.
Line 19 — Pension and profit-sharing plans. Contributions to employee retirement plans (your own retirement contributions go on Schedule 1).
Line 20 — Rent or lease. Vehicles and equipment (20a) and other business property such as office or studio space (20b).
Line 21 — Repairs and maintenance. Fixing equipment and maintaining business property.
Line 22 — Supplies. Materials consumed in your work that are not inventory.
Line 23 — Taxes and licenses. Business licenses, regulatory fees, and certain state and local business taxes.
Line 24a — Travel. Airfare, lodging, rental cars, and other costs of business trips away from your tax home.
Line 24b — Meals. Generally 50% deductible when the meal is ordinary, necessary, not lavish, and tied to a business contact.
Line 25 — Utilities. Business electricity, gas, water, and business phone or internet lines.
Line 26 — Wages. Pay to employees (not draws you take as the owner).
Line 27a — Other expenses. The catch-all for legitimate costs without a dedicated line: software subscriptions, cloud storage, professional dues, bank and merchant fees, business education, and continuing certification.

Most freelancers and gig workers spend the bulk of their deductions on advertising, car expenses, supplies, software, and the home office.

Home Office, Vehicle, and Equipment: The Big Three

Three deduction categories drive the largest savings for most Schedule C filers, and each has two methods.

Home office deduction

To qualify, you must use part of your home regularly and exclusively for business. A spare room used only as an office counts. The kitchen table does not.

The simplified method is the easy route: deduct $5 per square foot of office space, up to 300 square feet, for a maximum of $1,500. No receipts, no allocation math.

The actual-expense method deducts the business-use percentage of rent or mortgage interest, utilities, insurance, and repairs. It often produces a bigger deduction for larger home offices, but it takes more recordkeeping. Report it on Form 8829, which flows to Schedule C line 30.

Vehicle deduction

The standard mileage rate is 72.5 cents per business mile in 2026. Multiply business miles by the rate and you are done. You still need a mileage log showing date, destination, purpose, and miles.

The actual expense method deducts the business-use percentage of gas, insurance, repairs, depreciation, and lease payments. If you want to use standard mileage, you generally must choose it in the first year the vehicle is in service.

Equipment and depreciation

When you buy equipment (computers, cameras, tools, furniture), you have options. Section 179 lets you expense the full cost up front, up to the annual cap. Bonus depreciation is now a permanent 100% write-off for qualifying property placed in service after January 19, 2025. Both let you deduct big purchases immediately instead of spreading the cost over years.

Deductions That Aren’t on Schedule C (but Still Cut Your Tax)

Some of the most valuable self-employed deductions never touch Schedule C. They are above-the-line adjustments on Schedule 1 or separate Form 1040 deductions, and confusing them with Schedule C expenses is a common mistake.

Deductible half of self-employment tax. SE tax is 15.3% (12.4% Social Security plus 2.9% Medicare) on net earnings. You deduct one-half of it on Schedule 1.
Self-employed health insurance. Premiums for medical, dental, and qualifying long-term care coverage for you and your family are deductible above the line, up to your net business profit.
Solo 401(k) and SEP-IRA contributions. Retirement contributions for yourself as the owner go on Schedule 1, not as a Schedule C wage.
QBI deduction. The 23% qualified business income deduction is taken on Form 1040 after AGI. It reduces income tax only, not self-employment tax.
Startup cost election. You can deduct up to $5,000 of startup costs in your first year if total startup costs are $50,000 or less. The remainder is amortized over 15 years (180 months).

The key distinction is this: Schedule C deductions reduce both income tax and SE tax, while QBI reduces only income tax. A tool like Tax47 applies the QBI deduction, the deductible half of SE tax, and the home office deduction automatically as you enter your numbers, so you can see the difference without juggling three forms by hand.

Audit Red Flags and Recordkeeping for Schedule C

Schedule C gets reviewed more closely than a typical W-2 return because deductions are self-reported. A clean, well-documented return is your best protection.

Common audit triggers include:

Mixing personal and business expenses. Run business spending through a dedicated business bank account and card.
Deductions far above industry norms. Outsized car, meal, or travel claims relative to revenue stand out.
Large home office or vehicle claims. These are legitimate but draw attention, so keep your square footage and mileage logs tidy.
Three or more consecutive years of losses. Under IRC Section 183, this raises the question of whether your activity is a business or a hobby. A business is expected to show a profit motive.
Round numbers everywhere. Exact figures like “$5,000” across many lines suggest estimates rather than records.

On documentation, the IRS prefers receipts but also accepts bank statements, credit card statements, invoices, and contemporaneous logs that show the business purpose. Keep records for at least three years after filing. Good bookkeeping is not just audit defense. It is how you make sure you claim every dollar you are owed.

Estimate Your 2026 Refund With Every Deduction Applied

Knowing the deduction list is one thing. Seeing how it changes your refund is another, especially once self-employment tax, the deductible half of SE tax, the home office deduction, and the 23% QBI deduction all interact.

Tax47 lets you assemble a full return from real W-2, 1099, and Schedule C data and watch the estimated refund update live as you enter expenses. Its Schedule C form, Tax Break Finder, and conditional Self-Employment Tax section apply the 2026 One Big Beautiful Bill changes automatically.

Want the bigger picture first? Read our 2026 federal tax brackets guide for the rate tables, or browse the free tax tools to model specific scenarios. When you are ready to run your own numbers, download Tax47.

Frequently Asked Questions

What business expenses can I deduct on Schedule C in 2026?

Any ordinary and necessary business expense: advertising, car/truck, supplies, home office, insurance, travel, 50% of meals, software, professional fees, depreciation, and more.

What changed for Schedule C deductions in 2026?

The QBI deduction became permanent and rose to 23%, a new $400 minimum QBI deduction was added, 100% bonus depreciation was made permanent, and the standard mileage rate rose to 72.5 cents.

Can I deduct a home office on Schedule C?

Yes, if you use the space regularly and exclusively for business. Use the simplified method ($5/sq ft, up to 300 sq ft) or the actual-expense method.

Is the QBI deduction taken on Schedule C?

No. QBI is a separate deduction on Form 1040 that reduces income tax, not self-employment tax.

Can I claim Schedule C deductions without receipts?

The IRS prefers receipts but accepts other reliable records like bank and credit card statements paired with a log of business purpose; receipts offer the strongest audit protection.

How much of business meals can I deduct in 2026?

Generally 50%, when the meal is ordinary, necessary, not lavish, and tied to a business contact.

Can I deduct startup costs on Schedule C?

You can deduct up to $5,000 of startup costs in year one if total startup costs are $50,000 or less; the rest is amortized over 15 years.

What Schedule C deductions trigger an IRS audit?

Mixing personal and business expenses, deductions far above industry norms, large home office or vehicle claims, and three-plus consecutive years of losses.

Sources & References

IRS — About Schedule C (Form 1040) — Overview of who files Schedule C and what it reports.
IRS — Instructions for Schedule C (Form 1040) — Line-by-line instructions, including startup cost rules.
IRS — One Big Beautiful Bill provisions — QBI permanence, the 23% rate, and permanent 100% bonus depreciation.
IRS — 2026 business standard mileage rate (72.5 cents) — Official 2026 mileage rate announcement.
IRS — Self-Employment Tax — The 15.3% rate and the deductible half.
IRS — Simplified Option for Home Office Deduction — The $5 per square foot method.
IRS — Publication 463 (Travel, Gift, and Car Expenses) — Meal and travel deduction rules.

This article is for educational purposes only and is not tax, legal, or financial advice. Tax rules change periodically, always check current IRS guidance or consult a qualified tax professional.