Section 179 Deduction in California: Federal Limits, State Limits, and the Gap Between Them

The Section 179 deduction lets a business deduct the full cost of qualifying equipment in the year it is placed in service, instead of recovering it over five, seven, or fifteen years. Under the One Big Beautiful Bill Act, the federal limit is now $2.5 million, with the phaseout beginning at $4 million of property placed in service. For most businesses, that means the federal ceiling is effectively unreachable.

The California ceiling is $25,000, and it phases out starting at $200,000.

That is the entire subject of this page. Nearly everything published about Section 179 describes the federal rules, which is fine if you file in Texas. If you file a California return, the federal number tells you very little about what you will actually deduct. At The Law Office of Pietro Canestrelli, we plan equipment purchases for businesses in Temecula, Murrieta, San Diego, and across the Inland Empire around both numbers — because both determine what you pay.

How Section 179 Works

Section 179 of the Internal Revenue Code permits an election to expense the cost of qualifying property rather than capitalize and depreciate it. To qualify, property must be tangible, depreciable, acquired for business use, and placed in service during the tax year — meaning ready and available for its intended function, not merely purchased or paid for.

Qualifying property generally includes machinery and equipment, business vehicles above the applicable weight thresholds, computers and off-the-shelf software, office furniture, and certain improvements to nonresidential real property such as roofs, HVAC, fire protection, and security systems. Land, inventory, and property held for investment do not qualify.

Two federal limits constrain the deduction. The dollar limit caps the total election. The investment limit reduces that cap dollar-for-dollar once total property placed in service exceeds the threshold. A separate business income limitation under IRC Section 179(b)(3) prevents the deduction from creating or increasing a loss; the excess carries forward.

The Federal Numbers After OBBBA

Provision	Federal (2025 and after)	California
Section 179 dollar limit	$2,500,000	$25,000
Investment phaseout threshold	$4,000,000	$200,000
Bonus depreciation	100%, permanent	Not allowed

OBBBA raised the federal Section 179 limits for property placed in service after December 31, 2024, and separately restored 100% bonus depreciation permanently for qualifying property acquired and placed in service after January 19, 2025. Together these give federal taxpayers essentially unlimited first-year expensing on most equipment.

California’s figures come from the Franchise Tax Board’s Form 3885 instructions, which state plainly that California does not conform to the federal limitation amounts under IRC Section 179(b)(1) and (2), and that the maximum California deduction is $25,000. California has also never adopted bonus depreciation under Section 168(k), and did not do so in response to OBBBA. Because California’s conformity date was set at January 1, 2025 by Senate Bill 711 — before OBBBA was signed — none of the federal expansion reaches the state return.

The Phaseout Is Where People Get Hurt

The $25,000 cap gets the attention, but the $200,000 threshold does more damage. California reduces the deduction dollar-for-dollar above $200,000, which means the deduction is fully gone at $225,000 of property placed in service.

A Riverside County business placing $250,000 of equipment in service is not limited to $25,000 in California. It gets zero. That is a genuinely counterintuitive result, and it catches businesses that assumed a modest deduction was better than none.

A Worked Example

A Temecula manufacturing company buys $400,000 of production equipment and places it in service in June 2026.

Federal return. Section 179 can absorb the full $400,000, subject to business income. If income is insufficient, 100% bonus depreciation covers the remainder without the income limitation. Either way, the year-one federal deduction is $400,000.

California return. The Section 179 deduction is zero — $400,000 far exceeds the $225,000 full-phaseout point. Bonus depreciation is not permitted. The equipment is depreciated under California’s rules over its normal recovery period, producing perhaps $57,000 of first-year depreciation on a seven-year asset.

The gap. Roughly $343,000 of deduction exists federally in year one and does not exist for California. At the top individual rate, that is a meaningful state tax cost in a year the owner may have assumed the purchase had eliminated it. The deduction is not lost — it returns over the recovery period — but the timing difference is real money in a high-rate state, and it must be reflected in California estimated payments.

How We Plan Around the Gap

1. Elect Section 179 first, and elect it for California too. Where total additions stay under $200,000, the $25,000 California deduction is available and should be claimed. Applying bonus depreciation first wastes it, because bonus is federal-only.
2. Watch the $200,000 line. A business planning $240,000 of additions may preserve a state deduction by moving $50,000 into the following year. That is not aggressive planning; it is reading the statute.
3. Match the deduction to the entity that can use it. Businesses operating through multiple entities cannot double-dip the limits across commonly controlled companies, but which entity places the asset in service is often a real choice. Our S corporation and LLC pages address the structural side.
4. Recompute California estimated payments. A large federal deduction that does not exist for California is one of the more common causes of a state underpayment penalty among our business clients.
5. Maintain a dual depreciation schedule permanently. The federal and California basis in the asset will differ until disposition, and that difference drives the gain calculation on sale. Reconstructing it years later — typically under examination — is expensive and sometimes impossible.

Documentation and Audit Exposure

Section 179 claims draw examination attention on two fronts. Federally, the recurring issues are placed-in-service timing (equipment delivered in December but not operational until January belongs in the later year), the more-than-50% business use requirement, and vehicle weight classification.

For California, the issue is different and more mechanical: whether the required add-back was actually made. When a California return reflects federal depreciation figures without the Schedule CA adjustment, the discrepancy is visible and can generate a Notice of Proposed Assessment from the Franchise Tax Board. You then have 60 days to protest, with further appeal to the Office of Tax Appeals.

Records worth keeping for every Section 179 asset: purchase invoice with date, delivery and installation records establishing placed-in-service date, business use logs for vehicles and mixed-use property, the depreciation schedules for both federal and California, and board or member consent where the entity’s governing documents require it for capital expenditures.

Local Industry Notes

The California gap lands hardest on capital-intensive businesses, which describes a great deal of the regional economy. Inland Empire logistics and trucking operations run large rolling-stock schedules where the add-back is substantial every year. Temecula Valley agricultural operations and wineries face equipment cycles concentrated in particular years, which makes phaseout timing especially consequential. San Diego construction contractors and medical and dental practices — both frequent equipment purchasers — routinely encounter the $200,000 threshold without realizing it applies.

Businesses in these categories should be running the California calculation before the purchase, not at filing. By the time the return is prepared, the placed-in-service date is fixed and the planning window has closed.

Frequently Asked Questions

What is the Section 179 limit for California in 2026?

$25,000, with the phaseout beginning at $200,000 of property placed in service. The deduction is eliminated entirely at $225,000. These figures come from FTB Form 3885 instructions and are unchanged by OBBBA.

Why is California’s limit so much lower than the federal limit?

California is a fixed-date conformity state. Its conformity date is January 1, 2025, and it has separately declined to adopt the federal Section 179 limitation amounts under IRC Section 179(b)(1) and (2). The $25,000 cap has been California law for years.

Can I take bonus depreciation on my California return?

No. California has never adopted IRC Section 168(k) bonus depreciation, and did not adopt OBBBA’s permanent 100% restoration. Federal bonus depreciation must be added back on Schedule CA.

What happens to the deduction California disallows?

It is not forfeited. The disallowed amount is recovered through ordinary California depreciation over the asset’s recovery period. The cost is timing — deductions deferred five to seven years in a high-rate state.

Does Section 179 apply to vehicles?

Yes, subject to weight thresholds and luxury auto limitations under IRC Section 280F, and to the more-than-50% business use requirement. Vehicles are among the most frequently examined Section 179 claims, so contemporaneous mileage records matter.

Can Section 179 create a loss?

Not federally — the business income limitation caps it, with the excess carried forward. Bonus depreciation is not subject to that limitation, which is one reason the sequencing of the two elections matters.

Plan the Purchase Before You Make It

Equipment decisions are among the few tax outcomes a business can still control after the year begins — but only up to the placed-in-service date. If you are planning significant capital expenditures, the time to run both the federal and California numbers is before delivery.

Pietro Canestrelli holds an LL.M. in Taxation and advises businesses on depreciation planning, entity structure, and federal and state examination defense throughout Temecula, Murrieta, San Diego, Riverside, and San Bernardino. Schedule a consultation to review your equipment plan, or learn more about our corporate tax and tax planning services.