Business Tax 6 min read Published Verified for 2026

Understanding Deductions for Small Businesses, LLCs & S-Corps

Sunny Yadav, EA

Akash Khandale

Corporate Compliance Specialist

Understanding Deductions for Small Businesses, LLCs & S-Corps

Learn how to legally lower your business taxable income using Section 199A QBI deductions, Section 179 depreciation, home office write-offs, and S-Corp salary optimization.

Proactive tax planning is the difference between overpaying the IRS and reinvesting capital into your business. Whether you operate as a single-member LLC (Schedule C), a Partnership (Form 1065), or an S-Corporation (Form 1120-S), capturing every ordinary and necessary business deduction is essential.

Top High-Impact Business Tax Strategies

  • Qualified Business Income (QBI) Deduction (Section 199A): Eligible pass-through owners can deduct up to 20% of qualified net business income on their federal return.
  • S-Corporation Reasonable Compensation Split: Once net profits consistently exceed $70,000–$100,000, electing S-Corp status allows owners to split income between W-2 salary and K-1 distributions, saving thousands in 15.3% self-employment taxes.
  • Section 179 & Bonus Depreciation: Immediately expense qualifying computers, office equipment, software, and business vehicles placed in service before December 31.
  • Solo 401(k) & SEP-IRA Contributions: Business owners can shelter significant pre-tax income while building retirement wealth through employer profit-sharing contributions.

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