The average small business owner overpays taxes by $2,000-$5,000 per year simply by missing deductions they're entitled to. Not aggressive tax strategies — straightforward deductions that the IRS explicitly allows. The problem isn't eligibility, it's awareness and documentation.
If you use part of your home regularly and exclusively for business, you can deduct a portion of your rent/mortgage, utilities, insurance, and maintenance. Two methods:
Key rule: "Regular and exclusive use" means you can't deduct your kitchen table where you sometimes work. You need a dedicated workspace, even if it's a corner of a room.
If you use your personal vehicle for business (client visits, supply runs, bank trips), you can deduct mileage. The 2026 standard mileage rate is $0.70 per mile. At 5,000 business miles per year, that's a $3,500 deduction.
Documentation: Keep a mileage log — date, destination, business purpose, miles driven. Apps like MileIQ automate this. Without a log, the IRS disallows the deduction entirely.
Every business tool you pay for is deductible:
These are ordinary business expenses — 100% deductible in the year you pay them.
Section 179 lets you deduct the full cost of qualifying business equipment in the year you buy it, instead of depreciating it over several years. In 2026, the deduction limit is over $1 million.
Qualifying purchases: computers, printers, office furniture, machinery, vehicles (with limits), and even some building improvements.
If you're self-employed and pay for your own health insurance, you can deduct 100% of premiums for yourself, your spouse, and dependents. This is an "above the line" deduction — you don't need to itemize.
Solo 401(k) or SEP IRA contributions reduce your taxable income:
This is the single most powerful tax reduction tool for profitable small businesses.
The IRS doesn't deny deductions because they're invalid — they deny them because you can't prove them. Keep: