Section 179 vs Bonus Depreciation 2026 — $1,250,000 Cap, 40% Phase-Down, Vehicle Limits
Updated May 2026 · 12 min read · By Mustafa Bilgic
For small businesses purchasing equipment, vehicles, or computers in 2026, the two main accelerated depreciation tools are IRC §179 expensing and IRC §168(k) bonus depreciation. Both allow first-year deduction of asset cost that would otherwise be depreciated over 5-7 years under MACRS. Choosing the right combination can substantially reduce 2026 federal income tax — but the rules have changed materially in 2026 with the TCJA bonus depreciation phase-down to 40% and continued indexation of the §179 cap.
This guide explains the 2026 mechanics of both tools, the $1,250,000 §179 cap, the $3,130,000 §179 phase-out threshold, the 40% bonus depreciation rate, the SUV $30,500 limit, the Section 280F luxury auto depreciation schedule, and provides worked examples showing exactly how each tool interacts with the others.
Section 179 — How It Works in 2026
IRC §179 allows a taxpayer to expense (deduct immediately) up to a specified annual cap of qualifying business property purchases. For 2026, per IRS Rev. Proc. 2025-32:
| 2026 Section 179 limit | Amount |
|---|---|
| Maximum deduction | $1,250,000 |
| Phase-out threshold (deduction reduces dollar-for-dollar above this) | $3,130,000 |
| Phase-out elimination point | $4,380,000 (deduction = $0) |
| Maximum SUV (6,000-14,000 lbs GVWR) deduction | $30,500 |
| Taxable income limitation | Cannot exceed business taxable income; excess carries forward |
The phase-out works like this: for every dollar of qualifying purchases above $3,130,000, the §179 maximum deduction is reduced by one dollar. A business with $3,500,000 in purchases can deduct: $1,250,000 - ($3,500,000 - $3,130,000) = $1,250,000 - $370,000 = $880,000.
What Qualifies for §179?
Per IRC §179(d) and Treasury Reg. §1.179-2, qualifying property includes:
- Tangible personal property used in active trade or business (machinery, equipment, computers, software, off-the-shelf software, business vehicles)
- Single-purpose agricultural and horticultural structures
- Storage facilities for fungible commodities
- Qualified real property improvements (including roof, HVAC, fire protection, alarm systems, security systems — only if for non-residential real property)
- Qualified improvement property (QIP) — interior improvements to non-residential real property after the building is placed in service
NOT eligible:
- Buildings and structural components (foundations, walls, roof structures themselves)
- Land
- Property used 50% or less for business
- Property used by a tax-exempt organisation
- Property used outside the U.S.
- Property acquired from a related party
Bonus Depreciation — The TCJA Phase-Down
IRC §168(k) bonus depreciation allows a taxpayer to deduct a specified percentage of qualifying property cost in the year placed in service. The TCJA of 2017 raised bonus depreciation to 100% for property placed in service from late 2017 through 2022. The phase-down schedule under TCJA §13201:
| Year property placed in service | Bonus depreciation rate |
|---|---|
| 2022 (last 100% year) | 100% |
| 2023 | 80% |
| 2024 | 60% |
| 2025 | 40% |
| 2026 | 40% (per H.R. 1 extension — note that legislation is still subject to revision) |
| 2027 | 20% (scheduled per TCJA original) |
| 2028 | 0% (phase-out complete per TCJA original) |
The 2025-2026 rate has been the subject of legislative debate. The "One Big Beautiful Bill Act" passed by the House in 2025 proposed restoring 100% bonus depreciation through 2030 — verify the current rate against IRS Publication 946 and the most recent legislative action before relying on the 40% figure.
What Qualifies for Bonus Depreciation?
Per IRC §168(k)(2), qualifying property includes:
- Tangible personal property with MACRS recovery period of 20 years or less
- Computer software (off-the-shelf)
- Water utility property
- Qualified film/TV production
- Specified plant property
- Qualified Improvement Property (QIP) — interior improvements to non-residential real property, with 15-year MACRS recovery (this was the "retail glitch" fixed by CARES Act 2020)
NOT eligible:
- Real property (buildings, land)
- Property with longer than 20-year MACRS recovery period
- Property acquired from a related party
- Property previously used by the taxpayer in a non-qualifying use
The Critical Differences — Section 179 vs Bonus Depreciation
| Feature | Section 179 | Bonus Depreciation |
|---|---|---|
| Statutory cap on annual deduction | $1,250,000 (2026) | None |
| Phase-out threshold | $3,130,000 of purchases | None |
| Taxable income limitation | Yes — deduction limited to taxable income; excess carries forward | No — deduction can create a net loss |
| 2026 deduction rate | Up to 100% of cost (subject to cap) | 40% of cost |
| SUV cap (6,000-14,000 lbs GVWR) | $30,500 | Subject to §280F luxury auto schedule |
| Election required? | Yes — annually on Form 4562 line 6 | Default (automatic) — must elect out if desired |
| State conformity | Most states conform but some have lower caps | Varies; many states do NOT conform to federal bonus |
| Asset must be used 50%+ for business? | Yes | No — but bonus is reduced by business-use percentage |
| Eligible for QIP (Qualified Improvement Property) | Yes | Yes |
| Real property improvements (HVAC, roof, alarm) | Yes | No |
The most important practical difference: §179 has a hard $1,250,000 cap and cannot create a net operating loss. Bonus depreciation has no annual cap and CAN create a NOL. Small businesses with high equipment spending in a profitable year typically benefit most from §179; businesses in early growth phases benefit from bonus depreciation's ability to create NOLs that carry forward.
Section 280F — The Luxury Auto Schedule
IRC §280F imposes annual depreciation caps on "luxury automobiles" — most passenger vehicles under 6,000 lbs gross vehicle weight rating (GVWR). The 2026 caps per IRS Rev. Proc. 2025-32:
| Year placed in service | Maximum 1st year deduction | Year 2 max | Year 3 max | Year 4+ max |
|---|---|---|---|---|
| Without bonus depreciation | $12,400 | $19,800 | $11,900 | $7,160/year |
| With bonus depreciation | $20,400 | $19,800 | $11,900 | $7,160/year |
SUVs and trucks with 6,000+ lbs GVWR escape the §280F luxury auto cap. They can be expensed under §179 up to $30,500 (2026) + bonus depreciation on the remainder. This is the famous "Hummer loophole" — and the reason that businesses often choose SUVs over sedans for tax planning.
Stacking Order — How to Apply All Three Together
When multiple depreciation tools apply to the same asset, the IRS-required stacking order is:
- Section 179 deduction first. Apply up to the annual cap ($1,250,000 for 2026 or SUV $30,500) to the asset cost.
- Bonus depreciation second. Apply 40% (2026) to the remaining basis after §179.
- MACRS regular depreciation third. Apply standard 5-year or 7-year MACRS schedule to the final remaining basis.
The result is that for typical equipment, year 1 deduction can approach 100% of cost when §179 covers the full amount, or approximately 65-70% when §179 only covers a portion and bonus + MACRS handle the rest.
Worked Example #1 — $80,000 Equipment Purchase
Scenario. Small business purchases $80,000 of qualifying equipment in 2026. Business has $300,000 of taxable income before depreciation. Total business equipment purchases for the year: $80,000.
Option A — Full §179 election
- §179 deduction: $80,000 (under $1,250,000 cap)
- Bonus depreciation: $0 (no remaining basis after §179)
- MACRS: $0 (no remaining basis)
- Total year 1 deduction: $80,000
- Federal tax savings (21% C corp rate): $80,000 × 21% = $16,800
Option B — Bonus depreciation only, no §179 election
- §179: $0 (elected out)
- Bonus depreciation: $80,000 × 40% = $32,000
- MACRS year 1 (5-year property, half-year convention): ($80,000 - $32,000) × 20% = $9,600
- Total year 1 deduction: $32,000 + $9,600 = $41,600
- Federal tax savings: $41,600 × 21% = $8,736
- Remaining basis: $80,000 - $41,600 = $38,400 (deducted in years 2-5 per MACRS)
Comparison. §179 saves $8,064 more in year 1 federal tax than the bonus-only approach. The remaining $38,400 deducted under MACRS in years 2-5 also produces tax savings, but those are deferred — worth $8,064 less in present value terms at typical 6-8% discount rates.
For most small businesses with sufficient taxable income, §179 is the clear winner for equipment purchases under $1,250,000.
Worked Example #2 — $1,800,000 Equipment Purchase
Scenario. Larger business purchases $1,800,000 of qualifying equipment in 2026. Business taxable income before depreciation: $5,000,000.
Optimal stacking
- §179 deduction: $1,250,000 (at cap)
- Remaining basis: $1,800,000 - $1,250,000 = $550,000
- Bonus depreciation: $550,000 × 40% = $220,000
- Remaining basis after bonus: $550,000 - $220,000 = $330,000
- MACRS year 1 (5-year, half-year): $330,000 × 20% = $66,000
- Total year 1 deduction: $1,250,000 + $220,000 + $66,000 = $1,536,000 (85% of total purchase cost)
- Federal tax savings: $1,536,000 × 21% = $322,560
- Remaining $264,000 deducted in years 2-5 per MACRS
Worked Example #3 — $90,000 SUV Purchase (Truck over 6,000 lbs GVWR)
Scenario. Real estate agent purchases a $90,000 luxury SUV (e.g., Cadillac Escalade, GMC Yukon, Ford Expedition — all over 6,000 lbs GVWR) for 100% business use in 2026.
Stacking
- §179 deduction: $30,500 (SUV cap for 6,000+ lbs GVWR)
- Remaining basis: $90,000 - $30,500 = $59,500
- Bonus depreciation: $59,500 × 40% = $23,800
- Remaining basis after bonus: $59,500 - $23,800 = $35,700
- MACRS year 1 (5-year, half-year): $35,700 × 20% = $7,140
- Total year 1 deduction: $30,500 + $23,800 + $7,140 = $61,440 (68% of total cost)
- Federal tax savings (35% individual rate): $61,440 × 35% = $21,504
Compare to a $90,000 sedan (under 6,000 lbs GVWR): §280F caps year 1 at $20,400. Stacking is irrelevant — the cap binds. Same purchase produces only $7,140 tax savings (year 1) vs $21,504 for the SUV.
This explains the "Hummer loophole" for SUV purchases by self-employed real estate agents, contractors, doctors, and other high-income service providers.
State Tax Conformity — The Hidden Complication
Most states conform to federal §179 limits but some have lower caps. As of May 2026:
- California: §179 cap reduced to $25,000 (vs $1,250,000 federal). Bonus depreciation NOT conformed (state requires regular MACRS).
- New York: Conforms to federal §179 cap. Bonus depreciation generally conformed for NY corporate purposes but partial decoupling.
- Texas, Florida, Tennessee, Washington, Wyoming, South Dakota, Alaska, Nevada, New Hampshire: No state income tax — federal conformity irrelevant.
- Massachusetts: Conforms to federal §179 cap. Bonus depreciation conformed only for personal income tax, not for corporate.
- New Jersey: §179 cap $25,000 for years prior to 2020; conforms to federal for 2020+. Bonus depreciation NOT conformed for corporate.
- Pennsylvania: Conforms to federal §179. Bonus depreciation conformed.
Decoupling means state depreciation calculations differ from federal — typically requiring separate state depreciation tracking and add-back/subtract-back adjustments on the state return. This is one of the most common state tax compliance errors at small businesses with significant equipment purchases.
The Election Mechanics
Section 179 Election (Form 4562)
The taxpayer affirmatively elects §179 on IRS Form 4562 (Depreciation and Amortization), Part I, line 6 each year. The election specifies the dollar amount of §179 expense for each asset. Failure to file a timely Form 4562 with the §179 election forfeits the §179 deduction for that year — there is generally no late-election relief except by Private Letter Ruling.
Bonus Depreciation Default + Opt-Out
Bonus depreciation applies AUTOMATICALLY to qualifying property unless the taxpayer affirmatively elects out (per Treasury Reg. §1.168(k)-1(d)). The election out must be made on a class-by-class basis (e.g., elect out for 5-year property but not 7-year property), and is irrevocable for that tax year.
Taxpayers might elect out of bonus depreciation when:
- State tax decoupling would create undue complexity
- Net operating loss carryforward planning favors regular depreciation
- The taxpayer is in a low marginal tax bracket and prefers to spread the deduction over multiple years
- The taxpayer is an S corporation with limited basis that would not benefit from front-loaded deductions
Recapture Risk — What Happens If Business Use Drops?
Per IRC §280F(b)(2) and §1245, if a depreciated asset is later used less than 50% for business, the excess depreciation taken under §179 or bonus depreciation may be recaptured as ordinary income in the year of conversion. This is the "listed property recapture" rule.
Common recapture triggers:
- Self-employed business owner converts vehicle from business use to personal use (e.g., retirement)
- Equipment moved to a different entity that doesn't qualify for §179 (e.g., transfer from C corp to disregarded LLC)
- Business activity ceases or transitions to passive investment
- Asset sold for more than adjusted basis (gain reclassified as ordinary income to extent of depreciation taken)
Planning: avoid §179 on assets where business use percentage may decline; favor 5-year MACRS instead for those assets to spread the deduction and reduce recapture risk.