In 2026, "instant write-off" refers to 3 distinct mechanisms — not only one. Section 179, 100% bonus depreciation, and the de minimis safe harbor each allow immediate expensing. Yet they function under separate rules and separate elections, as well as separate limits. Using them interchangeably is one of the most frequent errors on capital-heavy small business returns.
Three instant write-off mechanisms — three different rules
Section 179 — the elected write-off
It lets a business deduct the full cost of qualifying equipment or property in the year it is placed in service. The election must be actively chosen on the return — it does not apply automatically.
100% bonus depreciation — now permanent
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. There is no dollar cap. This makes it the stronger option in a low-income or loss year, since it is not subject to the same net income limitation as the IRC § 179 election.
Property must satisfy specific eligibility requirements. Not every asset qualifies. Listed property, covering specific vehicles and mixed-use assets, carries additional documentation requirements to claim bonus depreciation at all.
De Minimis Safe Harbor — the overlooked option
It allows immediate expensing of items below a set per-item threshold without a depreciation schedule or formal election. The 2026 limits are USD 2,500 per invoice or item without an Applicable Financial Statement, and USD 5,000 with one. Software subscriptions and small tools as well as office equipment frequently fall under this threshold and can be expensed directly.
Example
Imagine a freelance video editor buys a USD 2,200 hard drive array and a USD 6,500 editing workstation in February 2026.
The hard drive array falls below the USD 2,500 de minimis threshold — it is expensed immediately with no election and no depreciation schedule. The workstation exceeds the threshold, so she evaluates Section 179 vs bonus depreciation in line with her projected net income for the year.
If her net business income for 2026 is USD 4,000, the IRC § 179 election is capped at that amount — the remaining USD 2,500 carries forward. Bonus depreciation has no such cap. The correct path depends on her full return picture — not just the asset cost.
What you should do next
Which mechanism produces the best outcome for your business depends on asset type, income level, entity structure, and other elections already in place — for a full breakdown of small business tax deductions 2026, covering depreciation rules and entity-specific guidance — review the complete CPA guide at Wasserman Accounting or schedule a consultation before you file.
