Business Deductions Guide — Tax Sherpa

Small business deductions reduce your taxable income by allowing you to write off ordinary and necessary expenses like home office costs, vehicle mileage, meals, and supplies. Tax Sherpa's clients typically save $10K–$15K annually by maximizing deductions most solopreneurs miss. Deductions are claimed on Schedule C (sole proprietors) or on your business entity's tax return.

Key Takeaways

• Business deductions reduce taxable income, not your tax bill dollar-for-dollar — but the savings add up fast
• You do not need an LLC to claim business deductions — sole proprietors file on Schedule C
• The most commonly missed deductions include home office, vehicle mileage, health insurance premiums, and retirement contributions
• Deductions must be ordinary (common in your industry) and necessary (helpful for your business) per IRS rules
• Quarterly review of your deductions is critical — most business owners leave money on the table every year

What You'll Find in This Guide

This guide is organized to help you find exactly the deduction information you need, whether you're a brand-new sole proprietor or an established LLC owner.

Understanding Business Deductions

• What Are Business Deductions? — How deductions work, the difference between deductions and credits, and why they matter
• Complete Business Deductions List — Every deduction available to small business owners in one place

Deductions by Entity Type

• LLC Business Deductions — What you can deduct and how your tax election changes the equation
• S-Corp Business Deductions — Deductions unique to S-corporation owners, including reasonable salary strategies
• Sole Proprietorship Deductions — The simplest entity with the most commonly missed deductions

Deductions by Category

• Home Office Deductions — Simplified vs. regular method, qualification rules, and which one saves more
• Vehicle & Mileage Deductions — Standard mileage rate vs. actual expenses, and record-keeping requirements
• Meals & Travel Deductions — What's deductible in 2025, documentation rules, and common mistakes
• Startup & New Business Deductions — Section 195 startup costs, organizational expenses, and first-year strategies
• Charitable Business Deductions — How business charitable contributions work vs. personal donations
• Business Loss Deductions — Net operating losses, excess business loss limitations, and carryforward rules

Deductions by Worker Type

• Self-Employed & 1099 Deductions — The complete list for independent contractors and freelancers
• Business Owner Deductions — Deductions available to owners of any entity type
• Freelancer Business Deductions — Industry-specific deductions for consultants, creatives, and gig workers

Technical & IRS Resources

• Schedule C Deductions Guide — Line-by-line walkthrough of every Schedule C deduction category
• Qualified Business Income (QBI) Deduction — Section 199A explained: eligibility, calculation, and phase-outs
• IRS Business Deductions: Rules & Publications — Key IRS publications, safe harbors, and audit triggers

FAQ

• Business Deductions FAQ — Answers to the most common questions about business deductions

About Tax Sherpa

Tax Sherpa is an Atlanta-based tax advisory firm specializing in tax strategy for solopreneurs and small business owners. Founded by Neal McSpadden, who has worked on 50,000+ tax returns and saved clients hundreds of millions in taxes. We don't just prepare returns — we build custom tax strategies that save our clients $10K–$15K annually.

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