
Tax Deductions for US Small Businesses: 2026 Guide
Thorough guide to US small business tax deductions in 2026, covering key areas from home office to retirement plans.
What has been corrected on this page?
Every accepted correction to this page is recorded with the exact change, so readers can see how the page improved over time.
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Major fix: corrected Section 179 deduction figures in the featured snippet and a full "2026 Limits" table, rewrote the bonus-depreciation phase-down table to reflect the One Big Beautiful Bill Act's permanent restoration of 100% bonus depreciation, updated the SUV expensing cap from $28,900 to $32,000, and fixed the Qualified Business Income (QBI/Section 199A) deduction, which had wrongly said it was scheduled to expire December 31, 2025, when OBBBA made it permanent (also updated the 2026 phase-in income thresholds to the exact current IRS figures).
BeforeFor 2026, the deduction limit is $1,220,000, with a phase-out threshold of $3,050,000 in total equipment purchases. | Below $191,950 (single) / $383,900 (married filing jointly): Full 20% deduction available... Sunset: scheduled to expire 31 December 2025.
AfterFor 2026, the deduction limit is $2,560,000, with a phase-out threshold of $4,090,000 in total equipment purchases, following the permanent increase enacted by the One Big Beautiful Bill Act (OBBBA) in July 2025. | Below $201,750 (single) / $403,500 (married filing jointly): Full 20% deduction available regardless of business type (2026 figures per IRS Rev. Proc. 2025-32)... Permanence: Made permanent by the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025, removing the previous scheduled sunset on 31 December 2025.
Why: The featured snippet, Section 179 limits table, full bonus-depreciation phase-down table, and QBI/Section 199A sunset framing all predated the OBBBA (signed July 2025), which permanently doubled the Section 179 caps, restored 100% bonus depreciation permanently, and made the QBI deduction permanent with exact 2026 IRS thresholds replacing the stale rounded figures.
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