Section 179 vs Bonus Depreciation: Year End Equipment Guide

You found a $95,000 piece of equipment your business actually needs, the dealer can deliver it by December 20, and your accountant says you can write the whole thing off this year. Then someone mentions Section 179 vs bonus depreciation and the conversation stalls. Both rules let you deduct the full cost of qualifying equipment in the year you place it in service, but they behave very differently when you have a loss year, multiple owners, state tax exposure, or plans to sell the asset early. Choosing the wrong one can cost you real money, and the deadline is December 31.

At our Coral Gables headquarters, this is the single most common December conversation we have with South Florida business owners. The good news: once you understand the four or five places these two rules diverge, the decision usually becomes obvious in about ten minutes.

Section 179 vs Bonus Depreciation: The Core Difference

Both provisions are accelerated depreciation. Instead of deducting a $95,000 machine over five or seven years, you deduct most or all of it immediately.

Section 179 (Internal Revenue Code Section 179) is an elective expensing provision. You choose, asset by asset, how much of the cost to expense. It is capped by an annual dollar limit, it phases out when you buy too much equipment in one year, and it cannot create or increase a net operating loss because it is limited to your business taxable income.

Bonus depreciation (IRC Section 168(k)) is a first-year depreciation allowance. Under the One Big Beautiful Bill Act signed in July 2025, 100% bonus depreciation was permanently restored for qualified property acquired after January 19, 2025. It has no dollar cap, no purchase-volume phaseout, and no income limitation, which means it can absolutely create a loss.

That last sentence is the heart of the decision. Section 179 is precise and elective. Bonus depreciation is blunt and powerful.

2026 Section 179 Deduction Rules at a Glance

The Big Beautiful Bill raised the Section 179 ceiling substantially starting with tax years beginning after December 31, 2024, and indexed it for inflation.

Note the final row. It is the reason many Miami-area entrepreneurs structured as C corporations lean toward Section 179.

Why Florida's Corporate Tax Rules Change the Math

Florida has no personal income tax, so pass-through owners (S corporations, partnerships, sole proprietors, most LLCs) feel no state-level consequence from either election. That is a genuine advantage of operating in Miami-Dade County.

C corporations are a different story. Florida imposes a 5.5% corporate income tax and requires taxpayers to add back federal bonus depreciation, then deduct it ratably over seven years. Section 179 receives no such addback treatment.

Example 1: The Florida C corporation. A Doral-based logistics C corp buys $700,000 of trailers and forklifts in December 2026.

• Bonus depreciation: $700,000 federal deduction, but the full $700,000 is added back for Florida, then spread at $100,000 per year for seven years. Year one Florida taxable income is $600,000 higher than federal, costing roughly $33,000 in current-year Florida tax that must be recovered slowly.
• Section 179: $700,000 deducted federally and no Florida addback. Federal benefit is identical, Florida benefit arrives immediately.

Same federal result, roughly $33,000 in year-one state tax difference. If you are a C corporation in South Florida, Section 179 should usually be your first $2,560,000 of expensing. We walk clients through this comparison as part of business tax strategy planning every fourth quarter.

When Bonus Depreciation Beats Section 179

Section 179 is not always the winner. Four situations favor bonus depreciation:

1. You are buying more than the cap. Purchases above $2,560,000 need bonus depreciation to be fully expensed. Above $4,090,000 in total purchases, Section 179 starts phasing out dollar for dollar and disappears entirely around $6,650,000.
2. Your business has a loss or breakeven year. Section 179 is capped at business taxable income. Bonus depreciation is not.
3. You want to create an NOL to carry forward. A loss generated by bonus depreciation can offset up to 80% of taxable income in future years.
4. Administrative simplicity. Bonus depreciation applies automatically to entire asset classes, with no per-asset elections to track.

Example 2: The loss-year restaurant group. A Coral Gables restaurant group has $40,000 of taxable income before depreciation and buys $260,000 of kitchen equipment and refrigeration in November 2026.

• Section 179: limited to $40,000 this year. The remaining $220,000 carries forward to a future profitable year. Current tax savings at a 32% marginal rate: $12,800.
• Bonus depreciation: full $260,000 deducted. Taxable income goes to negative $220,000, which flows to the owners' returns and can offset other income, including spouse W-2 wages and consulting income.

If the owners have $220,000 of other household income taxed at 32%, bonus depreciation produces roughly $70,400 of savings in the current year versus $12,800. That is a $57,600 timing difference from one election.

What Equipment Actually Qualifies

Both rules cover tangible personal property used more than 50% for business. Eligible categories include:

• Machinery, manufacturing equipment, and tools
• Computers, servers, monitors, and off-the-shelf software
• Office furniture, desks, shelving, and fixtures
• Business vehicles over 6,000 pounds GVWR (subject to special limits)
• Medical and dental equipment
• Restaurant equipment, refrigeration, and point-of-sale systems
• Qualified improvement property: interior nonstructural improvements to nonresidential buildings

Section 179 goes further than bonus depreciation on buildings. It specifically allows roofs, HVAC units, fire protection and alarm systems, and security systems on nonresidential real property. Those items are structural components and generally do not qualify for bonus depreciation, so Section 179 is the only route to immediate expensing.

The Placed in Service Rule That Trips People Up

Writing the check is not enough. The asset must be placed in service by December 31, meaning it is available and ready for its intended use. A CNC machine sitting in a crate in your Hialeah warehouse on December 31 is not placed in service. The same machine uncrated, wired, and ready to run is, even if you have not produced a single part.

For South Florida business owners racing a December 31 deadline, the practical checklist is:

1. Take delivery at your location before year end.
2. Complete installation and any required setup or calibration.
3. Obtain any permit or inspection sign-off needed to legally operate.
4. Photograph the installed asset with a dated file and save the invoice, delivery ticket, and installation record.
5. Confirm the asset is on your fixed asset schedule before the books close. Clean records here are one reason we push clients toward managed accounting support.

Heavy Vehicles: Where the Rules Get Specific

Vehicles draw more IRS scrutiny than any other equipment category, and the rules depend on weight.

Example 3: The Miami contractor's truck. A contractor buys an $88,000 crew-cab pickup with a 6.5 foot bed on December 18, 2026, used 90% for business. Deductible basis is $79,200 ($88,000 x 90%).

Because the bed exceeds six feet, the SUV cap does not apply. The contractor expenses the full $79,200. At a combined 35% effective rate for a pass-through owner with self-employment tax considerations, that is roughly $27,720 in tax reduction. Had the same owner bought an $88,000 luxury SUV under 6,000 pounds GVWR, the first-year deduction would be closer to $20,400, a difference of about $58,800 in deductions.

Business use percentage must be substantiated with a contemporaneous mileage log. If business use drops below 50% in a later year, you face depreciation recapture as ordinary income.

The Recapture Trap Most Owners Never Hear About

Expensing an asset drops its tax basis to zero. When you sell it, the entire sale price is generally gain, and gain attributable to depreciation is recaptured as ordinary income under IRC Section 1245, not favorable capital gain rates.

If you expense a $95,000 machine and sell it three years later for $55,000, that $55,000 is ordinary income. If your rate went up in the meantime, you deducted at a lower rate and are paying tax at a higher one.

There is a second recapture rule unique to Section 179. If business use of a Section 179 asset falls to 50% or less before the end of its recovery period, you must recapture the excess deduction. Bonus depreciation carries no equivalent business-use recapture test, which makes it somewhat safer for assets with variable usage.

A Five Step Year End Decision Framework

Use this sequence before December 31:

1. Project taxable income without the purchase. If you are at a loss, Section 179 gives you nothing this year.
2. Confirm entity type. C corporations in Florida should generally exhaust Section 179 first to avoid the state addback.
3. Total your 2026 asset purchases. Above $4,090,000, the phaseout matters.
4. Ask whether next year will be better or worse. If income jumps significantly in 2027, deliberately electing out of bonus depreciation and using regular MACRS can be worth more. A 100% deduction at a 24% rate is worth less than a staged deduction at 37%.
5. Verify cash flow. Never finance equipment you do not need for a deduction worth 21% to 37% of the cost. The deduction never exceeds the cash outflow.

Financed equipment qualifies for the full deduction in year one even if you paid almost nothing down, which is why December equipment loans are common. Just remember that interest expense is subject to separate limitations, a point we cover in small business bookkeeping reviews and year-end planning sessions.

Common Mistakes South Florida Business Owners Make

• Paying a deposit in December for January delivery. No deduction until placed in service.
• Buying equipment for a passive rental activity, which generally does not qualify as a trade or business for Section 179.
• Expensing everything, then discovering a loss year wasted a high-value deduction.
• Forgetting the S corporation shareholder-level Section 179 limit, which applies separately from the entity limit.
• Failing to keep mileage logs for vehicles, the fastest way to lose a six-figure deduction in an audit.
• Ignoring Florida's tangible personal property tax, which is assessed on business equipment in Miami-Dade County. The first $25,000 of assessed value is exempt, but you must file a DR-405 return by April 1 to claim it.

Making the Right Section 179 vs Bonus Depreciation Choice This Year

The deciding factors, ranked: your projected taxable income, your entity type and Florida exposure, your total purchase volume, and your expected rate next year. Profitable Florida C corporations usually start with Section 179. Pass-throughs with loss years or large purchase volumes usually start with bonus depreciation. Many businesses use both, applying Section 179 to roofs and HVAC that bonus depreciation cannot reach, then bonus depreciation for the rest.

You can also mix strategies across asset classes and revisit the decision on an amended return in limited circumstances, but the placed-in-service deadline is absolute. December 31 does not move.

Frequently Asked Questions

Q: Can I use both Section 179 and bonus depreciation on the same equipment purchase?

A: Yes, and it is common. Section 179 is applied first, then bonus depreciation covers the remaining basis, then regular MACRS depreciation handles anything left. For example, on a $3,000,000 purchase you could expense $2,560,000 under Section 179 and take 100% bonus depreciation on the remaining $440,000.

Q: What happens if my Section 179 deduction exceeds my business income?

A: The excess is disallowed for the current year but carries forward indefinitely to future years with sufficient business taxable income. Nothing is permanently lost, only delayed. Bonus depreciation has no income limitation, which is why loss-year businesses usually prefer it.

Q: Does Florida allow Section 179 and bonus depreciation deductions?

A: Florida has no personal income tax, so pass-through owners in Miami-Dade County face no state consequence. Florida C corporations generally conform to Section 179 but must add back federal bonus depreciation and deduct it over seven years, which makes Section 179 the better first choice for most profitable corporations headquartered in South Florida.

Q: Is used equipment eligible for these deductions?

A: Yes. Both Section 179 and bonus depreciation now apply to used property, provided it is new to you and not acquired from a related party. This makes secondhand machinery, pre-owned heavy vehicles, and refurbished medical equipment fully expensable.

Q: What is the biggest mistake business owners make with year end equipment purchases?

A: Buying equipment they do not need purely for the deduction. A $100,000 purchase at a 32% marginal rate saves $32,000 in tax while costing $100,000 in cash. The second biggest mistake is paying in December for equipment that arrives in January, which pushes the deduction into the following year.

Q: Can I take these deductions if I financed the equipment?

A: Yes. Full expensing applies to the purchase price regardless of how you paid, so a $120,000 machine bought with $12,000 down and a five-year note still generates a $120,000 first-year deduction if placed in service by December 31. Interest on the loan is deducted separately as it accrues.

Talk Through Your December Purchase With WAYG

Equipment decisions made in the last three weeks of the year have consequences that last five to seven years. Our team at WAYG's Coral Gables headquarters runs side-by-side Section 179 vs bonus depreciation projections for clients across Miami-Dade County and beyond, factoring in entity type, Florida corporate addbacks, recapture risk, and next year's expected rates.

If you are weighing a year end equipment purchase tax deduction and want a clear answer before December 31, schedule a consultation for a free strategy session, or request a quote for ongoing support. Businesses outside South Florida can work with our virtual CPA services team from anywhere in the country.