Contractor Tax Deductions for Self-Employed Contractors

Self-employed contractors deduct the ordinary and necessary costs of running their business on Schedule C: materials, subcontractors, vehicles, tools and equipment, insurance, bond premiums, license fees, a home office, phones and software, advertising, and professional fees. For 2026, three rules matter most: 100% bonus depreciation is back for equipment and work trucks acquired after January 19, 2025; the standard mileage rate is 72.5 cents per mile for January–June and 76 cents from July 1; and you now file Form 1099-NEC only for subcontractors you pay $2,000 or more.

Every deduction lowers both income tax and the 15.3% self-employment tax, so a dollar of deductions is worth more to a contractor than to a W-2 employee. The rules below come from the Schedule C instructions and IRS Publication 334, Tax Guide for Small Business.

The test every deduction has to pass

An expense is deductible if it is ordinary (common in construction) and necessary (helpful and appropriate for your business). It must be for the business, not personal, and you need records. Mixed-use items — a phone, a truck, internet — are deductible only for the business share.

Contractor deductions by Schedule C line

Building permits pulled for a client's project are part of that job's cost and are usually billed through to the client, so they belong in job cost alongside materials.

Vehicles: the deduction worth the most to most contractors

You have two choices for a truck or van:

Standard mileage rate. Multiply business miles by the IRS rate, then add parking and tolls. For 2026 the business rate is 72.5 cents per mile for January 1 – June 30 and 76 cents per mile for July 1 – December 31, after a mid-year increase (IRS standard mileage rates). If you want to use the standard rate for a vehicle, choose it in the first year that vehicle is used for business.

Actual expenses. Add fuel, repairs, tires, insurance, registration, and depreciation, then multiply by the business-use percentage. A heavy pickup or van rated over 6,000 lbs gross vehicle weight isn't subject to the annual passenger-vehicle depreciation caps, so with 100% bonus depreciation the business share of its cost can be deducted in the year you place it in service.

Example. You drive 9,000 business miles from January to June and 9,000 from July to December. Standard mileage = 9,000 × $0.725 + 9,000 × $0.76 = $6,525 + $6,840 = $13,365.

Which trips count? Under Publication 463 and Revenue Ruling 99-7, trips from home to a job site are deductible if your home office is your principal place of business, or if the job site is a temporary work location (expected to last a year or less). Driving from home to your shop or yard, if that's your regular place of business, is commuting and isn't deductible — but trips from the shop to job sites and supply houses are.

Tools and equipment

• Items of $2,500 or less (per item or per invoice) can be expensed immediately under the de minimis safe harbor if you elect it on your return — most hand tools, power tools, ladders, and small compressors.
• Larger equipment — a skid steer, a trailer, a tile saw station, a generator — can be written off in full with 100% bonus depreciation or Section 179 (up to $2,560,000 for 2026), or depreciated over five or seven years. The MACRS depreciation calculator compares the choices, and the MACRS depreciation guide explains the class lives.
• Tools you owned before the business can be depreciated starting when you put them into business use, at the lower of your cost or their value at that time.

Expensing everything in a strong year saves the most tax now; spreading it out can be better if this year's profit is low. Selling or trading equipment you've written off creates ordinary income up to the depreciation you took.

Insurance, bonds, and licenses

• General liability, commercial auto, tools and equipment (inland marine), builder's risk, and umbrella premiums are deductible on line 15. Prepaid annual premiums are deductible in the year paid if the coverage doesn't extend beyond 12 months into the next year.
• Workers' compensation premiums for your employees are deductible on line 15.
• License bond premiums are deductible. On a $25,000 bond at a 2% premium, you deduct the $500 you paid — not $25,000. See what a contractor bond costs.
• State license, renewal, exam, and local registration fees go on line 23. The general contractor license cost calculator estimates those costs by state.

Your own health insurance isn't a Schedule C expense. If you aren't eligible for an employer plan, deduct it as self-employed health insurance (figured on Form 7206 and reported on Schedule 1), which lowers income tax but not self-employment tax.

Subcontractors and workers

Payments to subcontractors are deductible as contract labor. To protect the deduction:

1. Collect a Form W-9 before paying anyone. If a sub won't give you a correct taxpayer ID, you're required to backup-withhold 24%.
2. File Form 1099-NEC by January 31 for each non-corporate sub you paid $2,000 or more during 2026 (the threshold was $600 through 2025).
3. Keep their certificates of insurance. Uninsured subs often get added to your workers' comp and GL premiums at audit; see the subcontractor insurance compliance guide.
4. Make sure they really are independent. Someone who works only for you, on your schedule, with your tools, may be an employee under IRS and state rules, which brings back payroll tax and penalties.

Wages and employer payroll taxes for real employees are deductible on lines 26 and 23.

Home office

Contractors who do estimating, invoicing, scheduling, and bookkeeping from a dedicated room at home can usually claim a home office even though the work happens on job sites. Beyond the deduction itself, the office makes trips from home to job sites deductible. Compare the simplified method ($5 per square foot up to 300 sq ft) and actual-expense method with the home office deduction calculator.

Smaller deductions contractors miss

• Cell phone: the business-use share of the plan and the phone.
• Software: estimating, accounting, scheduling, plan-viewing apps, cloud storage.
• Safety gear and work clothing not suitable for everyday wear: steel-toe boots, hard hats, high-visibility vests, FR clothing.
• Continuing education required to renew your license, code-update classes, OSHA training.
• Trade association dues and plan-room subscriptions.
• Bank and card processing fees on customer payments.
• Interest on a truck loan or equipment financing (business share).
• Bad debts only if you use the accrual method and already reported the income; cash-method contractors simply never report unpaid invoices.
• Startup costs incurred before your first job — up to $5,000 deductible in year one, with the rest amortized over 180 months, and the $5,000 reduced dollar for dollar once total startup costs exceed $50,000 (Schedule C instructions). The contractor startup costs guide lists what typically falls in that bucket.

Deductions that lower your tax without being expenses

• Half of self-employment tax, deducted on Schedule 1.
• Retirement contributions to a SEP IRA or solo 401(k) — often the largest single deduction available to a profitable contractor.
• The QBI deduction of up to 20% of qualified business income, available in full below taxable income of $201,750 (single) or $403,500 (joint) for 2026.

Worked example: a remodeling contractor's 2026 Schedule C

Self-employment tax on that profit: $71,645 × 92.35% × 15.3% = $10,123. Had this contractor missed the mileage, home office, and tool deductions ($16,515 combined), SE tax alone would have been about $2,333 higher, before counting income tax.

Records that hold up in an audit

• A mileage log (an app is fine) showing date, destination, purpose, and miles.
• Receipts and invoices tied to each job, plus a job-cost report.
• W-9s, 1099-NECs, and certificates of insurance for every sub.
• Insurance policies, bond invoices, and license receipts.
• Asset records showing purchase date, cost, and business-use percentage for every truck and major tool.
• A separate business bank account and card. Mixed accounts are the fastest way to lose deductions you're entitled to.

Putting the deductions to work

Once you know your deductions, run your expected profit through the 1099 tax calculator to see income tax and SE tax together, then set your quarterly payments with the guide to paying quarterly estimated taxes. If your profit is consistently above what you'd pay an employee to do your job, compare an S corporation election with the S corp payroll tax calculator.