Small Business Tax Deductions Every Contractor Should Know

The Moil Team · 9 min read · Published 2025-03-31

Stop overpaying taxes. Here are the 15 deductions most contractors miss — plus how to track them to save $8,000-$12,000 per year.

The Average Contractor Overpays $8,000-$12,000 in Taxes

According to the National Association of Tax Professionals, self-employed contractors are among the most likely to overpay federal taxes — mainly because they miss legitimate deductions. The IRS isn't going to remind you what you forgot to claim. If you're a plumber, electrician, HVAC tech, landscaper, or any trade business owner, these 15 deductions could save you thousands.

The 15 Tax Deductions Most Contractors Miss

1. Vehicle and Mileage ($5,000-$15,000/year)

You have two options: Standard mileage rate (67 cents/mile in 2024) or actual expenses (gas, insurance, repairs, depreciation). Track every business mile. A contractor driving 20,000 business miles/year deducts $13,400 at the standard rate. Use an app like MileIQ or simply log it in a spreadsheet.

2. Tools and Equipment ($500-$10,000+/year)

Every tool you buy for work is deductible — hand tools, power tools, diagnostic equipment, ladders, safety gear. Under Section 179, you can deduct the full cost of equipment up to $1,160,000 in the year you buy it rather than depreciating over time.

3. Home Office ($1,500-$5,000/year)

If you use a dedicated space at home for business (scheduling, invoicing, phone calls), you can deduct it. Simplified method: $5 per square foot, up to 300 sq ft = $1,500. Regular method: percentage of home expenses (mortgage/rent, utilities, insurance) based on office square footage.

4. Health Insurance Premiums (100% Deductible)

Self-employed individuals can deduct 100% of health, dental, and vision insurance premiums for themselves, their spouse, and dependents. This is an "above the line" deduction — it reduces your adjusted gross income.

5. Phone and Internet ($600-$1,200/year)

The business percentage of your phone bill and home internet is deductible. If you use your phone 70% for business, deduct 70% of the bill. Keep a log for one month to establish your business-use percentage.

6. Materials and Supplies (Varies)

Every pipe, wire, fitting, nail, and supply you buy for jobs is deductible. Keep every receipt. If you buy materials for stock, they're deductible when used (not when purchased). Use a dedicated business credit card to simplify tracking.

7. Subcontractor Payments (100% Deductible)

Every payment to a subcontractor is a business expense. Make sure to file 1099-NEC forms for anyone you pay $600+ in a year. Failing to file 1099s can trigger audits and penalties.

8. Business Insurance ($1,000-$5,000/year)

General liability, commercial auto, workers' comp, professional liability, tools and equipment insurance — all deductible. Umbrella policies that cover your business are also deductible.

9. Training and Certifications ($200-$2,000/year)

EPA certifications, NATE exams, OSHA training, trade school courses, conferences, workshops, and even relevant books and online courses. If it makes you better at your trade, it's deductible.

10. Marketing and Advertising ($500-$5,000/year)

Google Ads, Facebook ads, business cards, yard signs, vehicle wraps, website hosting, SEO services, door hangers, and sponsorships (like that Little League team). All marketing expenses are deductible.

11. Software and Subscriptions ($300-$2,000/year)

Moil, QuickBooks, Jobber, Canva, scheduling software, CRM tools, cloud storage — any software you use for business. Monthly subscriptions are deducted as they're paid.

12. Retirement Contributions ($6,000-$66,000/year)

SEP-IRA contributions up to 25% of net self-employment income (max $66,000) or Solo 401(k) contributions are deductible. This is the most powerful tax reduction tool for profitable contractors — and the most overlooked.

13. Meals (50% Deductible)

Business meals with clients, prospects, or employees are 50% deductible. Meals while traveling for business are 50% deductible. Keep the receipt and note who you met with and the business purpose.

14. Uniforms and Work Clothing ($200-$500/year)

Company uniforms, safety boots, hard hats, gloves, and clothing with your company logo are deductible. Regular clothing you could wear outside of work is not — even if you only wear it to job sites.

15. Qualified Business Income (QBI) Deduction (Up to 20%)

Pass-through businesses (sole props, partnerships, S-corps) can deduct up to 20% of qualified business income under Section 199A. For a contractor netting $80,000, that's a $16,000 deduction — reducing your taxable income to $64,000. Income limits and phase-outs apply.

How to Track Deductions Without Going Crazy

• Use a dedicated business bank account and credit card — never mix personal and business expenses.
• Take a photo of every receipt with your phone immediately. Apps like Dext or QuickBooks snap-and-store receipts.
• Log mileage daily — use an automatic tracker app or a simple notebook in your truck.
• Set aside 25-30% of every payment you receive for taxes. Put it in a separate savings account.
• Review expenses monthly for 15 minutes — don't wait until April.

Quarterly Estimated Taxes: Don't Get Hit with Penalties

If you expect to owe $1,000+ in taxes, the IRS requires quarterly estimated payments. Due dates: April 15, June 15, September 15, January 15. Miss them and you'll pay a penalty of roughly 8% annually on the underpayment. Use IRS Form 1040-ES or pay online at IRS.gov/payments.