IRC 179: Section 179 Expensing Election, OBBBA Dollar Limit, 179 vs. 168(k) Ordering, and Form 4562 Mechanics

IRC 179 is the provision that allows a taxpayer to elect to deduct the cost of qualifying business property in the year it is placed in service rather than capitalizing and recovering it over MACRS depreciation schedules. Every CPA, EA, and tax preparer who advises clients on business-asset acquisitions must understand this section: it carries a dollar cap that phases out at high acquisition levels, a taxable income limitation that can defer the deduction to a later year, an interaction with IRC 168(k) bonus depreciation that is governed by a mandatory ordering rule, a separate ceiling for SUVs, and state conformity rules that vary materially from state to state. OBBBA permanently raised the dollar limit and simultaneously restored 100% first-year bonus depreciation under IRC 168(k), creating a live practitioner decision in 2026: when to use Section 179, when to use 168(k), and how to order the two elections for maximum tax benefit. This guide works through each component in practitioner sequence.

Section 1: IRC 179 Statutory Framework

IRC 179(a): The Expensing Election

IRC 179(a) permits a taxpayer to elect to treat the cost of IRC 179 property as an expense, deducting it in the year the property is placed in service rather than depreciating it under MACRS over its normal recovery period. The election is asset-specific: the taxpayer designates on Form 4562 which property is subject to the election and, for property acquired during the year, the elected dollar amount. The election effectively converts a capital expenditure into an immediate deduction, accelerating the tax benefit of the purchase into the year the property is placed in business use. Cite IRC 179(a).

IRC 179(b)(1): The Dollar Cap and Phase-Out Threshold

IRC 179(b)(1) caps the total IRC 179 deduction that may be elected for a tax year. For 2026, the inflation-adjusted dollar limitation is approximately $2.56 million (verify the current year amount at IRS.gov; this amount adjusts annually for inflation under OBBBA). IRC 179(b)(2) provides a dollar-for-dollar phase-out: if the aggregate cost of IRC 179 property placed in service during the year exceeds the phase-out threshold (also adjusted annually for inflation; verify at IRS.gov), the maximum allowable IRC 179 deduction is reduced by that excess dollar for dollar. If the total placed-in-service cost exceeds the phase-out threshold by more than the dollar limitation, the IRC 179 deduction is reduced to zero.

OBBBA permanently raised both the dollar limitation and the phase-out threshold. Before OBBBA, these amounts were set at lower figures established under TCJA and prior law. A practitioner applying a pre-OBBBA dollar cap to a 2026 client will understate the allowable deduction. Confirm the exact 2026 dollar limitation and phase-out threshold in the applicable IRS guidance at IRS.gov. Cite IRC 179(b)(1) and (b)(2).

Qualifying Property Under IRC 179(d)

IRC 179 property under IRC 179(d) generally includes: (1) depreciable tangible personal property used in a trade or business; (2) off-the-shelf computer software; and (3) qualified real property (including qualified improvement property, certain roofs, HVAC, fire protection systems, and alarm systems for nonresidential real property, as defined in IRC 179(f)). The property must be acquired by purchase for use in an active trade or business. Property held merely for the production of investment income under IRC 212 is not eligible. Used property (property not original-use) is generally eligible for IRC 179 (unlike the original-use requirement that historically applied to some IRC 168(k) categories before OBBBA changes; verify current new vs. used rules at IRS.gov). Cite IRC 179(d).

IRC 179(c): Election Mechanics

The IRC 179 election is made on Form 4562, Part I, filed with the taxpayer's return for the year the property is placed in service. The election must be made by the due date of the return, including extensions. An election can be made (or revoked) on an amended return filed within the time permitted under IRC 179(c) -- but revocation of a previously made election generally requires IRS consent after the due date of the original return. Cite IRC 179(c); verify current election and revocation procedures in the Form 4562 instructions at IRS.gov.

Section 2: OBBBA 2026 Changes to IRC 179 and the Interaction with IRC 168(k)

Permanent Dollar Limit Increase

The One Big Beautiful Budget Act (OBBBA), enacted July 4, 2025, permanently raised the IRC 179(b)(1) dollar limitation and the IRC 179(b)(2) phase-out threshold. "Permanent" means the elevated amounts are not scheduled to sunset or step down, unlike the temporary TCJA-era bonus depreciation phase-down. The amounts continue to adjust annually for inflation, so practitioners must confirm the applicable year's figure at IRS.gov each filing season. Verify the OBBBA IRC 179 provisions at IRS.gov; subject to implementing regulations.

Restoration of 100% IRC 168(k) Bonus Depreciation

OBBBA also permanently restored 100% first-year bonus depreciation under IRC 168(k) for qualified property placed in service after the OBBBA effective date. Before OBBBA, the TCJA's 100% bonus depreciation had been phasing down (80% in 2023, 60% in 2024, 40% in 2025 for property not covered by a transition rule). OBBBA reversed that phase-down and made 100% first-year bonus depreciation a permanent feature. This restoration means that, for qualifying property placed in service in 2026, a taxpayer may elect 100% first-year expensing under IRC 168(k) regardless of the IRC 179 dollar cap or phase-out threshold -- but only after accounting for the mandatory ordering rule: 179 first, then 168(k) on the remaining adjusted basis. Verify OBBBA IRC 168(k) mechanics and effective dates at IRS.gov.

The 2026 Planning Landscape

With both a permanently elevated IRC 179 limit and 100% IRC 168(k) bonus depreciation available simultaneously in 2026, the practitioner question is no longer "which one do I get" but "which one should I use, and in what combination?" A taxpayer acquiring $5 million in equipment in 2026 can elect IRC 179 on some assets and rely on IRC 168(k) for the rest, or elect IRC 168(k) across the board, or mix them asset by asset. The right answer depends on taxable income, state conformity rules, the nature of the assets (new vs. used, listed property vs. non-listed), and planning objectives around carryforward vs. current-year deduction. Section 3 of this guide covers the ordering decision in detail.

Section 3: The 179 vs. 168(k) Ordering Decision

Why Ordering Matters

The ordering rule is statutory: under IRC 168(k)(1)(A), the additional first-year depreciation deduction under IRC 168(k) is computed on the adjusted basis of the property, and that adjusted basis is determined after the IRC 179 deduction (if any) has been taken. This means 179 reduces basis first, and then 168(k) is applied to the reduced (post-179) basis. The combined effect is that taking both elections on the same asset produces the same arithmetic result as taking either one alone up to the asset's full cost -- you cannot "double-dip" by applying both to the original cost. What matters is which election you use on which assets, in what amounts, given the client's specific taxable income, state conformity posture, and carryforward position.

When to Prefer IRC 179

IRC 179 is generally the better choice when:

• State conformity favors 179. If the client's state conforms to IRC 179 but does not conform to IRC 168(k) (or conforms to a lower 168(k) percentage), a 179 election produces a matching state deduction while a 168(k) election creates a state addback, eliminating the state tax benefit and potentially creating a state tax liability. Check current state law before advising; states update conformity periodically. Hedge: verify current state law; states update conformity dates periodically.
• Carryforward management. A prior-year 179 carryforward must be applied in the current year if possible. The practitioner may elect additional 179 in the current year to absorb carryforward amounts and maximize the timing of the deduction.
• Asset-level partial elections. IRC 179 can be elected on a specific asset in any amount up to the asset's cost, giving the practitioner precision to select how much of each asset's cost is expensed in the current year vs. depreciated over the MACRS recovery period. IRC 168(k) applies automatically as a percentage of the remaining adjusted basis (unless an opt-out election is made for the applicable asset class).
• Used property flexibility. IRC 179 generally applies to both new and used property (property not previously used by the taxpayer). Verify current IRC 179(d) eligibility for used property at IRS.gov.

When to Prefer IRC 168(k)

IRC 168(k) is generally the better choice when:

• No taxable income limitation. IRC 168(k) bonus depreciation is not limited by the taxpayer's active business taxable income. A client with a low-income or loss year can take 168(k) bonus depreciation and generate an ordinary loss that is carried forward (subject to other loss limitation rules), without the 179 election producing a carryforward that is not accessible until taxable income exists. Cite IRC 168(k); the taxable income limitation is found in IRC 179(b)(3), not IRC 168(k).
• No dollar cap or phase-out. IRC 168(k) has no dollar cap and no phase-out threshold analogous to IRC 179(b)(1) and (b)(2). A client acquiring more than the IRC 179 phase-out threshold in qualifying property can use 168(k) for the entire acquisition without worrying about a phase-out reduction, provided the property is otherwise eligible.
• No SUV cap under IRC 179(b)(5). Heavy SUVs (GVWR over 6,000 lbs.) subject to the IRC 179(b)(5) ceiling can still receive full 168(k) bonus depreciation on the vehicle's full adjusted basis (subject to the 50% business-use test) without the IRC 179(b)(5) ceiling. Confirm 2026 IRC 168(k) eligibility for heavy vehicles at IRS.gov.
• Partnership and S-corporation pass-through optimization. The 179 dollar cap and taxable income limitation apply at the partner or shareholder level; excess 179 at the entity level is limited by each owner's share of taxable income. IRC 168(k) at the entity level passes through to owners without a taxable income constraint. Model both outcomes at the owner level before electing. Verify partnership and S-corp rules at IRS.gov.

The 179 vs. 168(k) Comparison Table

The table below compares IRC 179 and IRC 168(k) across ten decision dimensions. Confirm all statutory rules and current-year figures at IRS.gov before advising any client. Dollar amounts adjust annually for inflation under OBBBA.

Section 4: Listed Property and the SUV Cap Under IRC 280F and IRC 179(b)(5)

IRC 280F and Listed Property

IRC 280F defines "listed property" -- the category of assets subject to heightened substantiation and use-percentage requirements. Listed property under IRC 280F(d)(4) currently includes passenger automobiles, other transportation property, entertainment and recreation property, and any other property specified by regulation. Computers were removed from listed property by the TCJA for property placed in service after December 31, 2017. When a taxpayer elects IRC 179 on listed property, the resulting deduction is further constrained by the IRC 280F annual cap (for passenger automobiles) and the 50% qualified business-use test. Cite IRC 280F(d)(4) and IRC 280F(b)(1). For a full discussion of IRC 280F, see the IRC 280F Listed Property and Luxury Vehicle Depreciation Guide.

Passenger Automobiles vs. SUVs: The 6,000 lb. GVW Line

The distinction between a passenger automobile (6,000 lbs. GVW or less under IRC 280F(d)(5)) and a heavy vehicle (over 6,000 lbs. GVWR) determines which set of rules applies to a vehicle IRC 179 election. For passenger automobiles, the IRC 280F(a) annual cap limits the combined first-year deduction from all sources (IRC 179 plus MACRS plus IRC 168(k)). The cap does not separately enumerate a "179 ceiling" for passenger automobiles; it caps the total, regardless of how the deduction is composed.

For vehicles with a GVWR over 6,000 lbs., the IRC 280F(a) annual passenger automobile cap does not apply. Instead, IRC 179(b)(5) imposes a separate ceiling specifically on the IRC 179 portion of the deduction for "sport utility vehicles" (generally GVWR over 6,000 lbs. and not more than 14,000 lbs., seating fewer than a specified number of passengers). Under IRC 179(b)(5), the IRC 179 deduction for a qualifying SUV is limited to 25% of the vehicle's cost, capped at an annually adjusted dollar limit. For 2026, that limit is approximately $32,000 or more; verify the current year amount at IRS.gov, as it adjusts annually for inflation under OBBBA. Cite IRC 179(b)(5).

The Heavy Vehicle Combined Deduction

For a heavy SUV placed in service in 2026 with 100% business use, the practitioner's computation is as follows (verify all figures and rules at IRS.gov before applying): (1) determine the vehicle's cost; (2) apply the IRC 179(b)(5) ceiling -- the lesser of 25% of cost or the annual dollar cap (approximately $32,000 or more for 2026; verify at IRS.gov); (3) reduce the vehicle's adjusted basis by the IRC 179 amount taken; (4) apply IRC 168(k) 100% bonus depreciation to the post-179 adjusted basis; (5) confirm the 50% qualified business-use test under IRC 280F(b) is met; and (6) verify no other IRC 280F constraint applies. For listed property, also confirm the IRC 274(d) substantiation requirement is met with a contemporaneous mileage log. Cite IRC 179(b)(5), IRC 168(k), and IRC 280F(b).

Section 5: Taxable Income Limitation and Carryforward Under IRC 179(b)(3)

How the Taxable Income Limitation Works

IRC 179(b)(3) limits the amount of the IRC 179 deduction allowable in the current year to the taxpayer's aggregate taxable income from the active conduct of any trade or business by the taxpayer. "Taxable income from the active conduct of a trade or business" is determined before the IRC 179 deduction itself. It includes wages, salaries, and active business income from all of the taxpayer's businesses -- but it does not include investment income (dividends, capital gains, interest) or income that is passive under the passive activity rules. The limitation applies at the taxpayer level, not the entity level, for pass-through entities. Cite IRC 179(b)(3)(A).

For example: if a sole proprietor has $180,000 of Schedule C net profit before the IRC 179 deduction and elects $200,000 of IRC 179, the current-year deduction is limited to $180,000 (the taxable income from active conduct of the business). The excess $20,000 carries forward to the following year as a new IRC 179 election for that year. In the following year, the $20,000 carryforward is deductible only to the extent of that year's active business taxable income, again limited by the IRC 179(b)(3) threshold. Verify the computation methodology and the definition of "active business taxable income" in the Form 4562 instructions and at IRS.gov.

Carryforward Mechanics

Under IRC 179(b)(3)(B), any IRC 179 deduction that cannot be claimed in the current year because of the taxable income limitation is carried over to the next tax year and treated as a new IRC 179 election for that year. Key attributes of the carryforward:

• Indefinite duration. The carryforward does not expire. It remains available until absorbed by future-year active business taxable income.
• Absorbed before new elections. The carryforward from prior years is generally taken before new-year IRC 179 elections when computing the current-year deduction. Confirm the ordering of carryforward vs. current-year elections on Form 4562, Part I at IRS.gov.
• Subject to the dollar cap. The carryforward amount, when added to any new current-year IRC 179 elections, must not exceed the applicable year's dollar cap (including any phase-out reduction for the carryforward year). Verify how the carryforward interacts with the current-year dollar cap and phase-out in the Form 4562 instructions at IRS.gov.
• No carryback. There is no provision to carry an IRC 179 excess back to a prior year. The excess moves only forward. Cite IRC 179(b)(3)(B).

Partial Elections

Because IRC 179 permits a partial election (any amount up to the asset's cost, subject to the overall dollar cap and taxable income limit), a practitioner can calibrate the election amount to exactly match the client's available active business taxable income, maximizing the current-year deduction without generating a carryforward. This precision is one of the key practical advantages of IRC 179 over IRC 168(k), which applies as an all-or-nothing percentage by asset class. Cite IRC 179(c) for the election mechanics; verify the Form 4562, Part I instructions at IRS.gov.

Section 6: Form 4562 Mechanics -- IRC 179 Election and Part I

Form 4562, Part I: The Section 179 Election

The IRC 179 election is made on Form 4562, Depreciation and Amortization, Part I (Section 179 Expensing). Refer to the current Form 4562 instructions at IRS.gov for the complete line-by-line mechanics; the following describes the key lines in practitioner sequence.

• Line 1: Maximum amount. Enter the applicable IRC 179(b)(1) dollar limitation for the tax year. Verify the current-year amount at IRS.gov; it adjusts annually for inflation under OBBBA. Do not use a prior year's figure without confirmation.
• Line 2: Total cost of IRC 179 property placed in service. Enter the aggregate cost of all IRC 179 property placed in service during the year, across all businesses. This is the total cost used to compute the phase-out reduction on Line 3 -- not the elected amount.
• Line 3: Threshold cost of IRC 179 property before reduction in limitation. Enter the IRC 179(b)(2) phase-out threshold for the year (verify at IRS.gov; adjusts annually for inflation). Subtract Line 3 from Line 2 to get the excess amount for the phase-out computation.
• Line 4: Reduction in limitation. The excess from Line 3 computation reduces the Line 1 dollar cap dollar for dollar. Enter the result. If the excess exceeds the dollar cap, the limitation is reduced to zero.
• Line 5: Dollar limitation for tax year. Subtract Line 4 from Line 1. This is the maximum allowable IRC 179 deduction for the year before the taxable income limitation.
• Lines 6 (and continuation): Listed property. Enter each qualifying property, its description, date placed in service, cost or basis, and the elected IRC 179 amount. Total the elected amounts in the applicable column.
• Line 9: Total cost of IRC 179 property. Total all IRC 179 property elected across all lines.
• Line 10: IRC 179 deduction from carryforward. Enter any IRC 179 carryforward from prior years (from Line 13 of the prior year's Form 4562).
• Line 11: Business income limitation. Enter the IRC 179(b)(3) active business taxable income limitation. The deduction on Line 12 cannot exceed this amount.
• Line 12: IRC 179 deduction for the year. The lesser of Line 5 or Line 11 (or the total elected amount on Line 9, if less). This is the allowable current-year IRC 179 deduction.
• Line 13: Carryover to next year. Any excess IRC 179 amount that cannot be deducted in the current year due to the taxable income limitation. This carries forward and is entered on Line 10 of the following year's Form 4562. Track this amount in client workpapers.

All line references are to the current Form 4562. Refer to the current Form 4562 instructions at IRS.gov; line numbers and instructions may change year to year. Always use the Form 4562 for the applicable tax year.

Election Statement and Deadline

The IRC 179 election is made by completing Form 4562, Part I and attaching it to the taxpayer's return filed by the due date, including extensions. No separate election statement is required beyond Form 4562 -- the form itself is the election vehicle. The election must be made by the extended due date of the return (for an individual, generally October 15 of the following year if a timely extension is filed). An election can be made on an amended return within the time allowed under IRC 179(c). Revocation after the due date requires IRS consent under IRC 179(c)(2). Verify current election and revocation procedures in the Form 4562 instructions at IRS.gov.

Section 7: State Nonconformity -- Where the Federal IRC 179 Election Can Create State Tax Surprises

The Conformity Date Problem

Many states adopt the federal Internal Revenue Code by reference -- but only as of a specific "conformity date." A state that conforms to the IRC as of January 1, 2017 (a pre-TCJA date) does not automatically adopt the TCJA's increased IRC 179 dollar cap, and does not adopt the OBBBA's permanent higher cap. Those states require a state-specific addback of the excess federal IRC 179 deduction (the amount above the state's own cap) on the state return. The result: a federal IRC 179 deduction of $1 million (within the OBBBA federal cap) may require a state addback of $975,000 in a state capped at $25,000, creating a significant state taxable income difference.

Verify current state law before advising any client on a federal IRC 179 election. States update conformity dates through the legislative process; a state that did not conform in 2025 may have enacted conformity legislation for 2026 or vice versa. Hedge: verify current state law; states update conformity dates periodically. Do not assume conformity for any state without confirming the current state revenue department guidance.

State Recovery Schedules for Nonconforming States

Many states that require an IRC 179 or IRC 168(k) addback on the state return still allow the taxpayer to recover the cost of the asset over time using the state's own depreciation schedule, which often follows an older version of MACRS or a state-specific depreciation table. The state addback in Year 1 is partially offset by lower state depreciation deductions in subsequent years. Practitioners must track the state basis separately from the federal basis for assets where the federal IRC 179 or 168(k) election produced a state addback, to ensure the correct state depreciation is claimed in future years and to compute the correct state-level gain or loss on disposition. Verify the applicable state depreciation rules at the state revenue authority website.

Section 8: IRC 1245 Recapture of IRC 179 Deductions on Disposition or Change in Use

IRC 179 Deductions Are Treated as Depreciation for Recapture Purposes

Under IRC 1245(a)(2)(C), IRC 179 deductions are treated as "depreciation allowed" for purposes of the IRC 1245 recapture rules. This means that when IRC 179 property is disposed of in a taxable transaction, any gain on the disposition (up to the total of all depreciation allowed or allowable, including the IRC 179 amount) is recaptured as ordinary income under IRC 1245(a)(1). The character as ordinary income (rather than capital gain or IRC 1231 gain) can materially affect the tax impact of a sale that would otherwise generate favorable capital gain rates. Cite IRC 1245(a)(2)(C) and IRC 1245(a)(1). For a full treatment of the recapture computation and Form 4797 reporting, see the IRC 1245 and 1250 Depreciation Recapture and Form 4797 Guide.

Recapture on Conversion to Personal Use or Non-Business Use

If IRC 179 property is converted from business use to personal or non-business use before the end of the property's MACRS recovery period, recapture applies. The amount recaptured is the IRC 179 deduction previously claimed (and any other depreciation), to the extent of the reduction in depreciable basis. This recapture is treated as ordinary income in the year of conversion. The recapture rule applies even though no actual sale or disposition has occurred; the conversion to personal use triggers recapture under IRC 1245 principles. Practitioners must advise clients who "stop using" business property (for example, converting a business vehicle to personal use) that the prior IRC 179 deductions may be fully or partially recaptured in the year of conversion.

Listed Property: Drop in Business Use and ADS Recapture

For listed property (including business vehicles) on which IRC 179 was elected, a drop in qualified business use below 50% in any year after the year of election triggers mandatory recapture under IRC 280F(b)(2). The recaptured amount is the excess of (1) the IRC 179 deduction plus any MACRS depreciation actually allowed or allowable in prior years, over (2) what would have been allowed under ADS straight-line for those same years. The excess is included in gross income as ordinary income in the year the business use drops below 50%. The ADS recapture for listed property is distinct from (but computed under the principles of) the IRC 1245 recapture that applies on a full disposition. Practitioners should advise clients with business vehicles to report business use percentages accurately each year, because a drop below 50% triggers recapture even without a sale. Cite IRC 280F(b)(2) and IRC 1245. For the full ordering and loss limitation context, see the Loss Limitation Ordering Rules Guide.

Form 4797 Reporting

IRC 1245 recapture (including recapture of IRC 179 deductions on disposition or conversion) is reported on Form 4797, Sales of Business Property. The ordinary income recapture amount (up to prior depreciation and IRC 179 deductions) is reported on Form 4797, Part III, which feeds into the taxpayer's ordinary income. Any gain in excess of the recapture amount (i.e., gain above the total of all prior depreciation and IRC 179 deductions) is treated as IRC 1231 gain on Part I of Form 4797. Refer to the current Form 4797 instructions at IRS.gov for the specific computation sequence and line references. Cite IRC 1245, IRC 1231, and IRC 179; verify at IRS.gov.

Frequently Asked Questions: IRC 179 Section 179 Expensing Election

• What is the IRC 179 dollar limitation for 2026 after OBBBA?

  Under OBBBA, the IRC 179(b)(1) dollar limitation was permanently raised. For 2026, the inflation-adjusted dollar limit is reported at approximately $2.56 million; verify the current year amount at IRS.gov, as OBBBA provides for annual inflation adjustments. The phase-out threshold under IRC 179(b)(2) was also permanently raised; confirm the 2026 threshold at IRS.gov. Applying a pre-OBBBA dollar cap to a 2026 client will understate the allowable deduction. Confirm the exact 2026 figures in the applicable IRS guidance at IRS.gov before filing or advising. Cite IRC 179(b)(1) and (b)(2).

• How does the IRC 179 taxable income limitation work, and what carries forward?

  IRC 179(b)(3) limits the amount deductible in the current year to the taxpayer's aggregate taxable income from the active conduct of a trade or business. If the IRC 179 election amount exceeds that taxable income limit, the excess carries forward indefinitely to the next tax year as a new IRC 179 election for that year, subject to the same taxable income limitation when applied. There is no carryback. Practitioners must track prior-year 179 carryforwards and apply them correctly on Form 4562, Part I. Verify carryforward mechanics in the Form 4562 instructions at IRS.gov. Cite IRC 179(b)(3).

• Does IRC 179 or IRC 168(k) bonus depreciation apply first, and why does the order matter?

  IRC 179 applies first. Under IRC 168(k)(1), bonus depreciation is computed on the property's adjusted basis after any IRC 179 deduction has been taken. The 179 deduction reduces basis before 168(k) is computed. This ordering matters because: 179 is subject to the taxable income limitation while 168(k) is not; 179 permits partial asset-level elections while 168(k) applies by asset class; and state conformity rules may differ between the two. In a year with sufficient taxable income, electing 179 on equipment and then applying 168(k) to the remaining basis maximizes the combined first-year deduction. In a low-income year, preferring 168(k) avoids a 179 carryforward and instead generates an NOL carryforward. Cite IRC 168(k)(1)(A) and IRC 179; verify at IRS.gov.

• What is the SUV cap under IRC 179(b)(5), and which vehicles does it affect?

  IRC 179(b)(5) limits the IRC 179 expensing deduction for any sport utility vehicle to 25% of the vehicle's cost, capped at an annually adjusted dollar limit. For 2026, that SUV-specific ceiling is approximately $32,000 or more; verify the current amount at IRS.gov, as it adjusts annually for inflation under OBBBA. The cap applies to vehicles with a GVWR over 6,000 lbs. and not more than 14,000 lbs. rated for fewer than a specified number of passengers. Vehicles under 6,000 lbs. GVWR are passenger automobiles subject to the IRC 280F(a) annual cap, not IRC 179(b)(5). IRC 168(k) bonus depreciation is available for heavy SUVs on the post-179 adjusted basis without a comparable per-vehicle dollar ceiling. Cite IRC 179(b)(5); verify current amounts and vehicle definitions at IRS.gov.

• Can a taxpayer revoke the IRC 179 election after the return is filed?

  Revocation of an IRC 179 election generally requires IRS consent after the due date of the return (including extensions) for the year in which the election was made. Under IRC 179(c)(2), an election (or any specification of property in the election) may be revoked only with IRS consent once the return's due date has passed. An election may be made or changed on a timely filed amended return within the time allowed under IRC 179(c). Do not assume a 179 election can be unwound simply by filing an amended return without IRS approval after the due date. Verify the current revocation procedures in the Form 4562 instructions at IRS.gov before advising any client who wants to reverse a prior-year 179 election. Cite IRC 179(c)(2).

• When should a practitioner prefer IRC 179 over IRC 168(k) bonus depreciation?

  IRC 179 is generally preferred when: the client's state conforms to IRC 179 but not to IRC 168(k) (avoiding a state addback); the client has a carryforward 179 amount from a prior year to absorb; the practitioner wants a partial, asset-level election with precise dollar control; or the property is used property that may have different treatment under 168(k). IRC 168(k) is generally preferred when the client lacks sufficient active business taxable income to support 179 in the current year (168(k) has no taxable income limitation), when the total placed-in-service cost exceeds the 179 phase-out threshold, or when the SUV ceiling under 179(b)(5) constrains the 179 deduction on a heavy vehicle. Model both outcomes and confirm state conformity before advising. Cite IRC 179 and IRC 168(k); verify OBBBA rules at IRS.gov.

• How does IRC 1245 recapture apply when IRC 179 property is converted to personal use or sold?

  Under IRC 1245(a)(2)(C), IRC 179 deductions are treated as "depreciation allowed" for IRC 1245 recapture purposes. On a taxable disposition, any gain up to the total of all prior depreciation allowed or allowable (including IRC 179 deductions) is recaptured as ordinary income under IRC 1245(a)(1). If the property is converted to personal use rather than sold, the prior IRC 179 amount is recaptured as ordinary income in the year of conversion. For listed property, a drop in business use below 50% triggers ADS recapture under IRC 280F(b)(2), computed by reference to IRC 1245 principles. Recapture is reported on Form 4797. Cite IRC 1245(a) and IRC 280F(b)(2); verify the computation in the Form 4797 instructions at IRS.gov.

• Which states do not conform to the federal IRC 179 dollar limitation after OBBBA?

  Many states have their own IRC 179 conformity rules that differ from the federal dollar limitation. States may cap the IRC 179 deduction at a lower amount, require an addback of the excess federal 179 deduction on the state return, or follow the federal amount with a different conformity date. After OBBBA raised the federal limit permanently, states that conform by reference to a fixed prior-law date will not automatically adopt the higher OBBBA amount. Practitioners must check each relevant state's current IRC 179 conformity rules before advising. Verify current state law at the applicable state revenue or taxation authority website; state conformity dates are updated periodically and can change after legislative sessions. Do not assume conformity for any state without checking. Hedge: verify current state law; states update conformity dates periodically.