Best Tax Deductions for LLCs in 2026: 18 Write-Offs Most Owners Miss

The LLC Tax Advantage: You're Not Just an Employee

W-2 employees have limited deduction options — mostly retirement accounts and mortgage interest. LLC owners can deduct almost every legitimate business expense, reducing both income tax AND self-employment tax. The key is documentation: every deduction requires records. Use a dedicated business bank account and credit card, and keep receipts.

The 18 Best LLC Tax Deductions

1. Home Office Deduction — If you use a dedicated space exclusively and regularly for business, deduct either $5/sq ft (simplified method, max 300 sq ft = $1,500) or actual expenses (rent/mortgage percentage, utilities, insurance). The exclusive use rule is strict — a desk in your bedroom doesn't qualify.
2. Vehicle/Mileage — 67 cents per business mile in 2026 (IRS standard rate). Or deduct actual vehicle expenses (gas, insurance, repairs) × business use percentage. Keep a mileage log. Business miles include client visits, banking, supply runs — not commuting.
3. Self-Employment Health Insurance Deduction — LLC owners can deduct 100% of health, dental, and vision insurance premiums for themselves, spouses, and dependents — even if you're not profitable enough for other deductions. This reduces income tax AND self-employment tax.
4. Retirement Contributions — SEP-IRA: contribute up to 25% of net self-employment income (max $69,000 in 2026). Solo 401(k): up to $23,500 employee contribution + 25% employer contribution = up to $69,000 total. These are among the largest tax deductions available to self-employed individuals.
5. Qualified Business Income (QBI) Deduction — Section 199A allows many LLC owners to deduct 20% of qualified business income from taxable income — potentially saving $8,000+ for a $100k income earner. Phase-outs apply for some service businesses above $191k income.
6. Business Insurance Premiums — General liability, professional liability (E&O), cyber insurance, and business property insurance premiums are fully deductible business expenses.
7. Professional Services — Accountant, attorney, consultant, and financial advisor fees paid for business purposes are fully deductible. This includes tax preparation fees for your business return.
8. Software and Subscriptions — Any software or subscription used in your business: accounting software (QuickBooks, FreshBooks), project management tools, design software, cloud storage, business apps. If used partly personally, deduct the business percentage.
9. Education and Training — Courses, books, workshops, and certifications that maintain or improve skills required in your business. Must be related to your current business (not a new career).
10. Phone and Internet — Deduct the business-use percentage. If you use your phone 70% for business, deduct 70% of your monthly bill. Keep records of business vs. personal use.
11. Business Travel — 100% of airfare, hotels, and transportation for legitimate business trips. Meals are 50% deductible. Personal days on business trips require prorating.
12. Marketing and Advertising — Website hosting, domain fees, paid ads (Google, Meta, LinkedIn), design work, business cards, promotional materials — all 100% deductible.
13. Office Supplies — Paper, printer ink, pens, postage, shipping materials. Small equipment under $2,500 is often expensed immediately under the de minimis safe harbor.
14. Bank Fees and Interest — Business bank account fees, credit card annual fees (business cards), and interest paid on business loans are deductible.
15. Meals with Clients/Employees — 50% deductible when directly business-related. Document the business purpose and who attended. Meals at business events can be 100% deductible.
16. Section 179 Equipment Expensing — Deduct the full cost of equipment and business property (computers, furniture, machinery) in the year purchased rather than depreciating over years. 2026 limit: $1.16 million.
17. Startup Costs (first year) — Up to $5,000 in startup costs in your first year. Remainder amortized over 15 years. Includes legal fees, market research, training before opening.
18. Half of Self-Employment Tax — You can deduct 50% of your self-employment tax (15.3%) from gross income. On $80,000 net income, that's roughly $5,650 in SE tax you can deduct — saving around $1,243 in income tax.