The small business tax deductions available in 2026 cover any expense that is ordinary and necessary for your trade or business under IRC § 162. The law changed significantly this year — bonus depreciation is back at 100%, the 20% QBI deduction is now permanent, and at least one deduction most small businesses have claimed for years was eliminated entirely.
The deduction rules have not changed — but the 2026 numbers have
"Ordinary and necessary" remains the IRS standard. “Ordinary” means the expense is common and accepted in the business field. “Necessary” means it is appropriate and helpful — not that the business could not survive without it.
What changed in 2026 is the scale of what qualifies for immediate deduction. The One Big Beautiful Bill Act (OBBBA) permanently restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19th of 2025 — IRS Notice 2026-11. In other words, qualifying equipment, machinery, and specific software placed in service this year may be fully deductible in year one.
The deductions most small businesses will use in 2026
Eligibility varies by entity type and documented business use, as well as applicable IRS rules. The expenses below appear regularly on small business returns.
Operating Expenses
Vehicle Use
The 2026 standard mileage rate is 72.5 cents per mile as per IRS Notice 2026-10. The actual expense method is available as an alternative. Both methods cannot be applied to the same vehicle in the same year.
Equipment and Property — Two Distinct Mechanisms
These are not the same rules. Applying them interchangeably is one of the most common filing errors on capital-heavy returns.
The 20% QBI Deduction — Section 199A
Pass-through owners may qualify for a 20% deduction on qualified business income, now permanent under the OBBBA. The 2026 phase-in thresholds are USD 201,775 for single filers and USD 403,500 for married filing jointly — Rev. Proc. 2025-32. Income above the thresholds generates W-2 wage and capital limitations that can lower or eliminate the benefit.
Meals
Client business meals with a documented business purpose remain 50% deductible. Entertainment stays at 0%. Employer-provided convenience meals — breakroom snacks, subsidized cafeterias — dropped from 50% to 0% deductible on January 1st of 2026.
An example scenario
A sole proprietor purchases a USD 3,800 laser engraver in March 2026. There are 3 available deduction paths. Each generates a distinct result in parallel to her income for the year.
The carryforward matters. If her Section 179 deduction exceeds her net business income in 2026, the unused amount is not lost — it rolls to the following tax year. Bonus depreciation does not carry the same income limitation — which makes it the stronger option in a loss year.
The correct roadmap varies with her projected income and entity structure as well as other elections already in place. That is not a decision to make at the filing screen.
What you should do next
The exact deductions available to your business in 2026 vary with the entity structure, what you purchased, how assets were placed in service, and how the income lands relative to phase-out thresholds. There is no universal checklist.
For a complete breakdown of small business tax deductions 2026 — covering the depreciation table, entity-specific rules, and records you need to support every claim — read our full CPA guide at Wasserman Accounting — or schedule a consultation to review your deduction strategy before you file.
