Top Small-Business Tax Deductions for 2026

First, a date that matters right now

If you pay quarterly estimated taxes, your second-quarter 2026 payment is due June 15, 2026. Setting aside money for that payment is step one. Capturing every legitimate deduction is how you make each of those payments smaller.

Equipment, vehicles, and big purchases

The 2025 tax law (the One Big Beautiful Bill Act) made two big changes that are now in full effect. First, 100% bonus depreciation is back permanently for qualifying new and used equipment acquired and placed in service after January 19, 2025. That means computers, machinery, furniture, and many work vehicles can often be written off entirely in year one instead of depreciated over several years.

Second, the Section 179 expensing limit jumped to $2.5 million for the 2025 tax year (the return most owners filed this spring) and is indexed to $2,560,000 for 2026, with phase-outs starting at $4 million and $4,090,000 respectively. Few small businesses hit those ceilings, which is the point. For most owners, nearly any equipment purchase can now be deducted immediately. Choosing between Section 179 and bonus depreciation still matters for state taxes and income smoothing, so it is worth a conversation before you buy.

The 20% QBI deduction is now permanent

The qualified business income deduction lets many sole proprietors, LLC owners, S corporation shareholders, and partners deduct up to 20% of qualified business income. It was scheduled to expire after 2025. The 2025 law made it permanent and widened the income ranges where the full deduction applies, so more owners qualify in 2026. If your business showed a profit, this is usually the single largest deduction on the return.

Vehicle and mileage deductions

The IRS business standard mileage rate is 72.5 cents per mile for 2026 driving, up from 70 cents in 2025. Keep a contemporaneous log (an app or a notebook both work) with date, miles, and business purpose. One caution: if you expensed a vehicle with Section 179 or bonus depreciation, you generally cannot use the standard mileage rate on that vehicle afterward and must track actual costs instead.

Home office, the simple way

If part of your home is used regularly and exclusively for business, you can deduct $5 per square foot up to 300 square feet (a $1,500 maximum) with the simplified method, or calculate actual expenses (a share of rent or mortgage interest, utilities, insurance) if that produces a bigger number. This deduction is legitimate and commonly missed by owners who fear it triggers audits. Documented correctly, it is routine.

Everyday deductions owners leave on the table

• One-half of your self-employment tax.
• Self-employed health insurance premiums for you and your family.
• Retirement contributions (SEP IRA or solo 401(k) can shelter a meaningful share of profit).
• Business insurance, software subscriptions, merchant fees, and professional services.
• Advertising and marketing, including your website.
• Contract labor (remember to collect W-9s and issue 1099-NEC forms for contractors paid $600 or more).

Common mistakes to avoid

• Mixing personal and business spending in one account, which makes deductions hard to defend.
• Guessing at mileage or home office numbers without records.
• Missing quarterly estimated payments and absorbing penalties that erase your deduction savings.
• Filing without a human review. Software does not ask follow-up questions; a preparer does.

How Zero Fuss Taxes helps

We guide your intake, organize your documents, flag anything missing, and an experienced, IRS-registered preparer completes and reviews your return. Serving Longwood, Orlando, and all of Central Florida in person, and small business owners nationwide online. You review and approve before anything is filed, with clear pricing and a real person to talk to.

FAQ

General information, not tax advice for your specific situation. Rules can change — a human preparer reviews your facts before any return is filed.