Here is the number that catches most California business owners off guard: for equipment and qualifying assets placed in service during 2024, you can no longer write off the full cost in year one. The bonus depreciation phase-out 2024 california reality means the federal first-year write-off has dropped to 60 percent, and California never conformed to bonus depreciation at all. If you budgeted for a 100 percent deduction, your cash flow projection is off by thousands of dollars right now.

Most owners assume depreciation is a boring back-office topic their accountant handles. That assumption is quietly costing them real money. The federal bonus depreciation rate is on a scheduled decline, California runs on a completely separate set of rules, and the gap between the two creates both traps and planning opportunities. This guide breaks down exactly how the phase-out works, what it means at the state level, and how to protect your deduction before the window narrows further.

Quick Answer: What the Bonus Depreciation Phase-Out 2024 California Rules Actually Mean

For the 2024 tax year, federal bonus depreciation lets you deduct 60 percent of the cost of qualifying new or used assets in the first year, down from 80 percent in 2023 and 100 percent through 2022. California does not conform to federal bonus depreciation, so on your state return you get zero bonus depreciation regardless of the federal number. That mismatch forces California business owners to keep two sets of depreciation schedules and plan carefully around the shrinking federal benefit.

In plain English: the IRS is slowly taking away the big first-year write-off, and California was never giving it to you in the first place. Understanding both halves of that equation is the difference between a smart equipment purchase and a surprise tax bill.

How Bonus Depreciation Phased Down From 100 Percent

Bonus depreciation is a federal tax provision that lets businesses deduct a large percentage of the cost of an eligible asset in the year it is placed in service, rather than spreading that cost over many years through standard depreciation. The 2017 Tax Cuts and Jobs Act supercharged it to 100 percent, but that generosity came with an expiration clock built in.

Here is the federal phase-out schedule that every business owner should have taped to the wall:

• 2022 and earlier: 100 percent first-year bonus depreciation
• 2023: 80 percent
• 2024: 60 percent
• 2025: 40 percent
• 2026: 20 percent
• 2027: 0 percent unless Congress extends it

The key phrase is “placed in service.” That means the asset has to be ready and available for its intended use during the tax year, not just purchased or paid for. If you buy a $50,000 piece of machinery in December 2024 but it does not arrive and get installed until January 2025, you fall under the 40 percent rule, not 60 percent. That single detail has cost business owners tens of thousands in lost deductions.

According to IRS Publication 946, which explains how to depreciate property, bonus depreciation applies to property with a recovery period of 20 years or less, certain computer software, and qualified improvement property. That covers most equipment, vehicles, machinery, furniture, and technology that small businesses actually buy.

Why 60 Percent Still Beats Standard Depreciation

Even at 60 percent, bonus depreciation front-loads a large chunk of your deduction. Say you buy $100,000 of qualifying equipment in 2024. Bonus depreciation gives you $60,000 off the top. The remaining $40,000 then gets depreciated under the normal Modified Accelerated Cost Recovery System schedule, which produces additional first-year depreciation on top of that $60,000. So your actual first-year federal deduction lands well above $60,000 once the regular MACRS portion is added in.

This front-loading matters most when you have a high-income year and want to reduce taxable income immediately rather than slowly over five to seven years.

Why California Business Owners Face a Double Standard

Here is the part that trips up nearly every business owner in the state. California does not conform to federal bonus depreciation. Not at 100 percent, not at 60 percent, not at any level. On your California return, bonus depreciation simply does not exist. California also decouples from the higher federal Section 179 limits in many cases, capping state-level Section 179 expensing far below the federal amount.

What this means practically is that you have to maintain two separate depreciation schedules. One for federal purposes that uses the 60 percent bonus rate for 2024, and one for California that spreads the entire cost over the asset’s normal recovery period using standard methods. This is why many business owners who try to self-prepare their returns end up with errors that trigger Franchise Tax Board notices.

The California Franchise Tax Board is explicit that the state follows the Internal Revenue Code as of a specific conformity date and specifically excludes bonus depreciation. When you claim a large federal deduction that your state does not allow, you create a book-to-tax difference that must be tracked year after year. That difference reverses over time, meaning California eventually gives you the deduction, just much more slowly.

A Real Example of the Federal-State Gap

Picture a landscaping company that buys $120,000 in trucks and equipment during 2024. Federally, 60 percent bonus depreciation delivers a $72,000 first-year deduction, plus regular MACRS on the remaining $48,000. On the California return, the business gets no bonus depreciation. Instead, the full $120,000 is depreciated over five to seven years under standard MACRS rules, producing maybe $24,000 of first-year California depreciation depending on the convention used.

That is a roughly $48,000 difference in deductions between federal and state in year one. If you forget to adjust for this on your California return, you will either overstate your deduction and risk an audit, or understate your federal savings and leave money on the table.

KDA Case Study: Manufacturing Owner Navigates the Phase-Out

One of our clients, a specialty food manufacturer operating as an S Corporation in the Central Valley, came to us in late 2024 with a plan to spend $340,000 on new production line equipment. Her previous accountant had told her she could write off the entire amount in year one, a holdover belief from the 100 percent bonus depreciation era. She was building her entire cash flow and tax estimate around a full $340,000 federal deduction and had not considered California at all.

When we ran the actual numbers, the picture looked very different. At the 2024 federal rate of 60 percent, bonus depreciation covered $204,000 of the purchase. We then layered Section 179 expensing and standard MACRS on the remaining balance to maximize her federal first-year deduction, bringing it to roughly $255,000. On the California side, we structured the purchase to capture the maximum allowable state Section 179 deduction and set up a proper second depreciation schedule for the remainder.

The strategic move was timing. We advised her to place $180,000 of the equipment in service before December 31, 2024, to lock in the 60 percent rate, and schedule the remaining equipment installation for early 2025 only where it made operational sense, while fully aware the rate would drop to 40 percent. The combined federal and state tax savings for the 2024 tax year came to approximately $71,000. She invested $4,500 in our planning and preparation services, producing a first-year return of nearly 16 times her fee. More importantly, she avoided a false cash flow assumption that would have left her short on her quarterly estimated payments.

Ready to see how we can help you? Explore more success stories on our case studies page to discover proven strategies that have saved our clients thousands in taxes.

How to Maximize Your Deduction Before the Window Narrows

The phase-out is a moving target, and every year you wait costs you 20 percentage points of first-year write-off. Here is how to make the most of what remains.

Step-by-Step: Capturing the 2024 Rate

1. Confirm the placed-in-service date. The asset must be ready and available for use by December 31, 2024, to qualify for the 60 percent rate. Keep delivery receipts, installation records, and photos as documentation.
2. Verify the asset qualifies. It must have a MACRS recovery period of 20 years or less. Most equipment, vehicles, furniture, and technology qualify. Real property generally does not.
3. Combine with Section 179 strategically. Section 179 lets you expense qualifying purchases up to an annual limit. For federal purposes you can stack Section 179 and bonus depreciation, but the order and amounts matter for optimizing both federal and California outcomes.
4. Build your California schedule separately. Set up a parallel depreciation schedule that excludes bonus depreciation and reflects California’s lower Section 179 cap.
5. Coordinate with estimated payments. Adjust your fourth-quarter 2024 estimated tax payment to reflect the real deduction, not the assumed one.

If your business is weighing a large equipment purchase, a professional review through our tax planning services can model the federal and California impact side by side before you commit the capital. Many owners discover that timing a purchase by even a few weeks changes their deduction by tens of thousands.

Run Your Own Numbers First

Before any purchase decision, it helps to understand how the deduction flows through to your overall bill. You can plug your business profit and projected equipment spend into this small business tax calculator to get a rough sense of the tax impact before you sit down with a strategist.

What Happens If You Get the Timing Wrong

The single most expensive mistake business owners make with the phase-out is misjudging the placed-in-service date. Buying equipment in one year but placing it in service in the next can drop your bonus rate from 60 percent to 40 percent, a 20 point swing on the entire asset cost.

Red Flag Alert: Do not assume that signing a purchase order or paying a deposit locks in the current year’s rate. The IRS looks at when the asset is actually ready and available for use, not when you paid for it. A machine sitting in a crate in your warehouse is not placed in service until it is installed and operational.

Another common error is claiming federal bonus depreciation on the California return. California systems are built to catch this mismatch, and claiming a disallowed deduction invites a Franchise Tax Board adjustment, interest, and potential penalties. The fix is simple but requires discipline: maintain the two schedules and reconcile them every year.

Pro Tip: Keep a running book-to-tax difference tracker for every major asset. This record shows exactly how much extra depreciation California will give you in future years as the federal and state schedules converge, which is real money you do not want to forget to claim later.

Do I Still Qualify for Bonus Depreciation on Used Equipment?

Yes. One of the most overlooked features of the current bonus depreciation rules is that they apply to used property, not just new. Before the 2017 law, bonus depreciation only covered new assets. Now, as long as the used equipment is new to you and was not acquired from a related party, it qualifies for the same 60 percent rate in 2024.

This opens real savings for businesses that buy pre-owned vehicles, machinery, or technology. A construction company buying a used excavator for $90,000 in 2024 can claim $54,000 of bonus depreciation on it, the same as if it were brand new.

What Assets Do Not Qualify for Bonus Depreciation?

Not everything is eligible. Assets with a recovery period longer than 20 years, such as most commercial buildings, do not qualify for bonus depreciation. Land never qualifies because it does not depreciate. Certain property used primarily outside the United States and property acquired from related parties is also excluded.

For real estate investors, this is where strategies like cost segregation become powerful, because a cost segregation study can reclassify portions of a building into shorter-life assets that do qualify for bonus depreciation. That is a separate and advanced topic, but it illustrates why depreciation planning is rarely one-size-fits-all.

Federal vs California Depreciation at a Glance

This table makes the planning challenge obvious. The two systems diverge sharply, and the gap must be managed deliberately every single year you own the asset.

Should You Accelerate Purchases Before 2025?

Yes, consider accelerating if:

• You were already planning the purchase within the next 12 to 18 months
• You have a high-income year and need the deduction now
• The equipment can realistically be placed in service by December 31, 2024
• Your cash flow supports the purchase without strain

Hold off if:

• The purchase does not fit your actual operational needs
• You would need to finance at high interest just to capture the deduction
• You expect a much higher income year in 2025 or 2026 where even the smaller bonus rate delivers more value against higher-bracket income

Never let the tax tail wag the business dog. A deduction is only valuable if the purchase makes sense for your operations in the first place.

Frequently Asked Questions

Does California ever allow bonus depreciation?

No. California has consistently decoupled from federal bonus depreciation. You will not get it on your state return at any rate. Instead, California requires standard depreciation over the asset’s recovery period, which eventually returns the full deduction, just more slowly than the federal system.

Can I use Section 179 instead of bonus depreciation in California?

Yes, but California caps Section 179 expensing far below the federal limit, at $25,000 for most businesses. This is still useful for smaller purchases and is often the primary accelerated deduction available at the state level.

What happens to bonus depreciation after 2026?

Under current law, federal bonus depreciation drops to 20 percent in 2026 and disappears entirely in 2027 unless Congress passes an extension. Because this is subject to legislative change, high-value depreciation decisions should always be made with current-year guidance.

Do vehicles qualify for bonus depreciation?

Many business vehicles qualify, though passenger automobiles are subject to annual luxury auto depreciation caps that limit the deduction. Heavy SUVs and trucks over 6,000 pounds gross vehicle weight often qualify for much larger deductions, which is why vehicle purchase timing deserves its own analysis.

This information is current as of October 5, 2026. Tax laws change frequently. Verify updates with the IRS or FTB if reading this later.

Book Your Equipment Depreciation Strategy Session

If you are planning a major equipment purchase and you are not sure how the shrinking federal bonus depreciation rate and California’s non-conformity will hit your actual tax bill, that uncertainty is costing you. Our strategy team will model your federal and California depreciation side by side, time your purchases to capture the maximum deduction, and build the dual schedules that keep you compliant with both the IRS and the Franchise Tax Board. Click here to book your consultation now.