July 4, 2025, was an impactful day that saw the enactment of the “One Big Beautiful Bill Act” (“OBBB” or “Big Beautiful Bill”) in response to growing calls for tax reforms for small and medium‑sized businesses.

While the bill is unprecedented in many ways, a feature that stood out was the major overhaul of Section 179 expensing and bonus depreciation.

This is particularly relevant for businesses that deal in purchasing equipment and machinery, or if they are eligible for real property cost recovery.

In this article…

1. What Changed: Section 179 Gets Supercharged, Bonus Depreciation Restored
2. Why It Matters for Small & Midsize Businesses?
3. How They Work Together: Section 179 + Bonus Depreciation
4. Real‑World Example: Tax Changes in Action
5. The Broader Impact: Why This Policy Shift Matters
6. Your Action Plan: Capitalizing on the New Tax Bill
7. Section 179 Limits Tied to Taxable Income
8. Actionable Strategies for Maximizing Your Depreciation Deductions

What Changed: Section 179 Gets Supercharged, Bonus Depreciation Restored

Section 179 Expensing

This section of the Internal Revenue code allows businesses to minus the cost incurred for buying qualified equipment or implementing real property improvements instead of letting it depreciate over the years. Prior laws had set the deduction limit at $1.25 million, resulting in a phase-out of dollar‑for‑dollar above $3.13 million in purchases up to about $4.38 million.

OBBB has raised this threshold so that the new deduction limit is $2.5 million, while the phase‑out threshold begins at $4 million, tapering thereafter.

This effectively means that the scope of immediate deduction you can avail of has doubled for many growing businesses.

Bonus Depreciation (IRC § 168(k))

First introduced under TCJA, bonus depreciation levels shot to 100% through 2022, only to decline to 80% in 2023 and 60% last year, whereas it was scheduled for 40% in 2025.

With OBBB in place, 100% bonus depreciation has been revived permanently and will effectively apply to qualified property acquired and placed in service on or after January 19, 2025.

Why It Matters for Small & Midsize Businesses?

These changes are indeed significant. Most importantly, they aim to convert long-standing deductions into instant money in your pocket. This means that you can get your eligible assets fully expensed in the year of their service.

What this means for you:

Stronger liquidity

Immediate write‑offs have a drastic effect on your taxable income up front. This will give you space to preserve funds to reinvest in growth.

Simplified Financial Planning

Section 179 and bonus depreciation can be combined to cover excess cost.

Greater flexibility

The consequences of Section 179 are even more significant in states that are not subject to federal bonus depreciation rules.

How They Work Together: Section 179 + Bonus Depreciation

These tools can be brought together to supercharge your financial situation.

To start with, you can apply Section 179 for up to $2.5 million. If your purchases exceed $4 million, they will then be subject to a taxable income limitation and phase‑out.

You can then add the bonus depreciation amount to the remaining qualifying asset cost. The best part is that there’s no cap or threshold on bonus depreciation.

Consider the example of a small decorated apparel company that buys $5 million in equipment. Under Section 179, it is liable to deduct $2.5 million, to which it can add an additional amount of $2.5 million via 100% bonus depreciation.

Overall, it will be in a position to deduct the entire amount it invested: $5 million, in year one only.

What are the prerequisites?

• Most tangible personal property, including machinery, office equipment, computers, and furniture, comes with a recovery period of 20 years or less.
• Certain qualified improvement property, such as interior upgrades to non-residential buildings. 
• Qualified production property (see below).
• Both new and used equipment that form part of a business's first use.

What is Qualified Production Property (QPP)

Another remarkable aspect of OBBB is that it has made qualified production property or nonresidential real property eligible for 100% expensing.

However, the law will only apply if the given property was utilized in construction work after December 31, 2024, and eventually placed in service before January 1, 2034.

Real‑World Example: Tax Changes in Action

Suppose you run a mid‑sized manufacturing shop with a taxable income of $3 million. In mid-2025, you purchase $2 million in machining equipment while investing another $1.5 million in computers and furniture. In addition, you acquire $3 million worth of qualified production facility improvements (QPP).

Let’s devise what your tax strategy should look like:

1. First, apply Section 179. This would allow you to deduct $2.5 million, but remember it’s subject to the income limit.
2. You then move on to apply bonus depreciation. This would trigger an immediate deduction of remaining qualifying equipment and QPP costs, amounting to $4 million in total write-off in the first year. 
3. Carry forward any unused Section 179 deduction to future years. If you factor in Section 179 limitations on income, the remainder will carry over, and over time, your accumulated bonus will cover the entire $4 million of excess.

This translates into a substantial cash‑flow benefit. By gaining a rapid write‑off, you can free up precious capital while lowering your tax burden for 2025.

The Broader Impact: Why This Policy Shift Matters

The policy shift set into motion by OBBB is not merely technical. The fact that it expands immediate expensing instruments makes it a powerful lever for attracting small business investment.

Getting rid of front-end tax barriers will give an impetus to capital formation, which will not only fuel productivity but confer a competitive advantage.

It has brought greater long-term clarity, especially around phase-downs, now that Section 179 expansion and 100% bonus depreciation are permanent provisions under OBBB.

The QPP provision is likely to promote domestic manufacturing by giving businesses an incentive to invest in facilities in the US.

While critics have pointed out soaring revenue costs and deficit implications, proponents have argued that since small- and mid-sized firms are the top users of Section 179 tools, the expansion will bring direct benefits to entities that desperately need liquidity.

Your Action Plan: Capitalizing on the New Tax Bill

Take into Account the Timing

It’s important to focus on the deadline for bonus depreciation. Only assets acquired and placed in service on or after January 19, 2025, are applicable.

Any assets placed into service between January 1 and January 18 will be assessed under fallback rules, which reduce the bonus depreciation to 40% and may require a special election.

Section 179 Limits Tied to Taxable Income

The exact amount incurred as a Section 179 deduction cannot exceed your business's net taxable income. If you don’t get to use it in this period, the amount can be carried forward to future years.

Check State Conformity

State-level bonus depreciation rules can differ from federal guidelines. Although many come under the ambit, Section 179 expensing often still applies even if they don’t. Your state tax authority or advisor can better guide you on this.

Opt for Mixed Asset Purchases

Depending on your tax strategy, you can also leverage MACRS depreciation in combination with Section 179 and bonus depreciation to create an optimized mix.

Prioritize Documentation & Elections

Maintain comprehensive records encompassing invoices, contracts, and in-service dates. You may also include your business‑use affidavits that are less than 50% along with Form 4562 filings describing Sec 179 elections and bonus depreciation claims.

Actionable Strategies for Maximizing Your Depreciation Deductions

• Review capital budgets for the remaining months of 2025. Based on that, you can decide whether you need to accelerate or delay purchases to make the most of deductions.
• Consult cost segregation studies to gain insights into real property purchases or renovations. This can help you identify components that are liable to immediate expensing and can thus deliver major upfront tax benefits.
• Work with your tax advisor to determine projected estimates. You can compare results from different scenarios, such as what you can expect when Section 179 or bonus depreciation is applied separately or collectively applied.
• Evaluate your state's stance towards tax rules, particularly when you operate in states that do not comply with bonus depreciation rules.
• If your net income is tight and you want to absorb the minimum impact of Section 179 income limitations, Bonus depreciation can help you recover the full deduction. You should remain vigilant, as this might push you into a net operating loss, which can have its own set of consequences.

Final Thoughts

The One Big Beautiful Bill has proved to be revolutionary with its doubling of Section 179 limits to $2.5 million and a permanent return to 100% bonus depreciation. This affords small and mid‑sized businesses an immediate tax planning opportunity they haven’t had for years.

These tools go beyond technical adjustments, they’re financial mechanisms that empower businesses to invest, expand, and compete in the market.

Businesses shouldn’t overlook this timely opportunity. Revisit your 2025 investment plans, and consult your tax advisor so that you can use Section 179 and bonus depreciation to your advantage. In doing so, you may unlock a direct link between your tax strategy and your business’s long-term growth.