Contractor Tax Deductions: The 2026 Guide for the Self-Employed

If you're a self-employed contractor, every dollar you can legitimately deduct is a dollar you don't pay tax on — and at a self-employment tax rate of about 15.3% plus your income tax bracket, those dollars add up fast. The problem is almost never that contractors deduct too little on purpose. It's that they didn't track it. The receipt got lost, the miles never got logged, and at tax time they hand their accountant a shoebox and shrug.

This is a plain-English overview, not tax advice — always confirm specifics with your accountant. But here's what most contractors can deduct.

1. Vehicle mileage — usually the biggest one

Driving to job sites, the supply house, and between customers is deductible. In 2025 the IRS standard mileage rate was 70¢ per mile, and a contractor who drives 10,000 business miles a year can deduct roughly $7,000. Most people never claim it because they didn't keep a log.

You can use the standard mileage rate (miles × the IRS rate) or the actual-expense method (gas, repairs, insurance, depreciation). The standard rate is simpler and usually wins for contractors. Either way, the IRS wants a contemporaneous log — dates, miles, and purpose — not a guess you reconstruct in April.

2. Tools and equipment

Hand tools, power tools, ladders, and equipment are deductible. Smaller purchases can typically be written off the year you buy them; larger equipment may be depreciated or expensed under Section 179. Keep every receipt.

3. Materials and job supplies

Lumber, fixtures, paint, fasteners, and anything else you buy for a specific job is a deductible cost of doing business. Tracking these per job also tells you something more valuable than the deduction: whether each job actually made money.

4. Your phone and software

The business-use portion of your cell phone bill is deductible, along with the apps and software you run the business on — including the subscription for your estimating and invoicing app. If you use your phone 80% for work, you can deduct 80% of the bill.

5. Insurance and licenses

• General liability insurance
• Commercial vehicle insurance
• Tools and equipment coverage
• Trade licenses, permits, and renewal fees
• Bonding costs

6. Home office

If you use part of your home regularly and exclusively for the business — running the books, storing materials, scheduling — you may qualify for the home office deduction. The simplified method is $5 per square foot up to 300 square feet.

7. Subcontractor and helper pay

If you pay subcontractors, that pay is deductible — but you'll need to issue a 1099 to anyone you paid $600 or more in the year, so keep clean records of who you paid and how much.

8. The little ones that add up

• Work clothing and safety gear (boots, gloves, hi-vis, hard hats)
• Advertising — yard signs, truck wraps, business cards, online ads
• Bank and payment-processing fees (yes, the Stripe/Square fee is deductible)
• Continuing education and certifications
• Business meals (generally 50% deductible) and job-related travel
• Accounting and legal fees

Don't forget quarterly estimated taxes

As a self-employed contractor, taxes aren't withheld for you. The IRS expects estimated payments four times a year, and underpaying can trigger penalties. A good rule of thumb is to set aside 25–30% of your profit as you go so the quarterly bill doesn't blindside you.

The real fix: track it as you go

Every deduction above is worthless if it lives in your memory. The contractors who keep the most of their money are the ones who log the mile, snap the receipt, and record the expense the day it happens — not the ones who try to reconstruct a year in one painful weekend.

That's the whole reason Job Assistant includes bookkeeping, a mileage log that does the IRS math for you, and a quarterly tax estimate. You log a trip or a receipt in a few seconds from your phone, and it adds up the deduction automatically — so at tax time your numbers are already done.