Section 179 Deduction 2025: Business Equipment Tax Savings Guide

The Section 179 deduction isn’t new, but in 2025, it looks better than ever. Thanks to updates in the One Big Beautiful Bill Act (OBBBA), small and mid-size businesses now have expanded opportunities to write off the full cost of equipment and software in the year they place it in service.

For business owners making strategic investments in growth, this deduction can significantly reduce taxable income—freeing up cash that can be reinvested elsewhere.

In this guide, we’ll walk through what’s changed for Section 179 in 2025, how bonus depreciation factors in, and what you need to do to claim these valuable deductions.

Table of Contents

1. What is Section 179 depreciation?
2. Section 179 limits and phase-outs for 2025
3. Bonus depreciation returns to 100%
4. Section 179 vs. bonus depreciation: Key differences
5. Qualifying equipment and purchases
6. Who benefits most from Section 179 in 2025?
7. Tax planning tips: Timing, strategy, and documentation
8. How to claim Section 179 and bonus depreciation
9. Don’t leave tax savings on the table

What is Section 179 depreciation?

Section 179 allows businesses to deduct the full purchase price of qualifying business equipment and software in the same year the asset is placed into service—rather than spreading the deduction out over several years through traditional depreciation. For business owners, this means immediate tax savings on essential equipment purchases, making it easier to reinvest in operations, technology, or growth.

This accelerated deduction is especially impactful when making large capital investments, such as upgrading machinery, buying new computers, or implementing business-critical software. Under section 179 depreciation 2025, these upfront write-offs can significantly reduce your taxable income for the year, giving you more financial flexibility when you need it.

To qualify, the equipment must be used for business purposes more than 50% of the time and be in service by the end of the tax year. Whether purchased outright or financed, eligible items can be fully deducted—helping businesses of all sizes realize meaningful business equipment tax savings right away.

Section 179 limits and phase-outs for 2025

The One Big Beautiful Bill Act doubled the Section 179 deduction limit and raised the phase-out threshold.

For the 2025 tax year:

• Maximum Section 179 deduction: $2,500,000
• Phase-out threshold: Begins at $4,000,000 in total equipment purchases
• Eligibility cap: Equipment purchases over $6.5 million disqualify a business from Section 179

These changes mean that more businesses—especially growing firms investing in new tools and technologies—can benefit from immediate write-offs.

Bonus depreciation returns to 100%

For 2023 and 2024, bonus depreciation was scheduled to phase down (80%, then 60%).

But for 2025, the OBBBA reinstated the 100% bonus depreciation rate.

Bonus depreciation differs from Section 179 in a few ways:

• It applies after Section 179 is used
• It has no spending limit
• It can be used by businesses of any size
• It applies to both new and used equipment (must be first use by your business)

When used together, Section 179 and bonus depreciation can potentially allow a business to fully deduct large capital investments in a single year.

Section 179 vs. bonus depreciation: Key differences

Understanding the difference can help you choose which method (or combination) is most beneficial based on your total capital spending and tax strategy.

Qualifying equipment and purchases

Not all business assets qualify for Section 179, but many do. Eligible purchases include:

• Machinery and manufacturing equipment
• Office furniture and fixtures
• Computers, laptops, and tablets
• Business software (off-the-shelf)
• Vehicles used more than 50% for business
• HVAC, security, and fire protection systems (for non-residential property)

Used equipment also qualifies, as long as it’s new to your business. Certain improvements to nonresidential buildings are eligible, too.

Always keep documentation, receipts, and usage logs to validate your deductions in case of audit.

Who benefits most from Section 179 in 2025?

Section 179 is designed to support small and mid-sized businesses, and the new 2025 thresholds reflect that.

You might benefit if:

• You plan to purchase or finance significant equipment this year
• You’re upgrading technology or systems for efficiency
• You’re a startup investing in core infrastructure
• You’re trying to reduce taxable income and reinvest savings

Even solo entrepreneurs, freelancers, or LLCs can take advantage, as long as equipment is used for business more than half the time.

If your purchases exceed $2.5 million but are under $6.5 million, pairing Section 179 with bonus depreciation may deliver optimal savings.

Tax planning tips: Timing, strategy, and documentation

Section 179 can unlock substantial tax savings, but only if you’re intentional about when and how you make your purchases—and how well you document everything along the way.

Start with the calendar

For the 2025 tax year, assets must be purchased and placed into service by December 31, 2025. That means the equipment or software isn’t just ordered or delivered—it needs to be fully operational and used in your business. If you wait too long, supply chain delays or installation issues could push your service date into 2026, disqualifying the deduction for this year.

Keep it business-first

To qualify for Section 179, the property must be used for business more than 50% of the time. For vehicles or equipment with both personal and business use, keeping clear records is essential. Mileage logs, usage reports, and expense tracking can all help prove that the asset meets the IRS requirement.

Understand the cash flow impact

The deduction can help reduce your taxable income, but it doesn’t reduce the purchase cost itself. You’re still spending real money—so before you rush to buy equipment, consider whether it fits into your overall cash flow plan. A deduction today shouldn’t put your operations in a bind tomorrow.

Financing can be a smart move

One advantage of Section 179 is that you don’t need to pay for equipment in full to claim the deduction. If the asset is financed and placed in service before year-end, the entire cost may still qualify. This lets businesses conserve cash while still benefiting from a full deduction. It’s one reason why equipment leasing and financing are so common in the fourth quarter.

Align purchases with long-term growth

The best use of Section 179 isn’t last-minute spending to reduce taxes—it’s strategic investment. Businesses often use this deduction to upgrade aging infrastructure, expand capacity, or invest in technology that drives future growth. In these cases, the tax break is an added benefit, not the primary motivation.

Keep your paperwork organized

Receipts, financing agreements, service dates, and usage records should all be stored securely. If your return is audited, the IRS will want proof that your deduction was valid. Documentation is especially important for assets like vehicles or electronics, where business vs. personal use may be questioned.

Don’t go it alone

Section 179 is a powerful tool, but it’s one piece of a much larger tax strategy. A tax advisor can help you determine whether this deduction is the best move based on your income, spending plans, and long-term goals. And when paired with bonus depreciation or other incentives, the opportunities multiply.

How to claim Section 179 and bonus depreciation

You’ll need to complete IRS Form 4562 to claim these deductions. Be prepared to report:

• The description and cost of each asset
• The date each item was placed in service
• Business use percentage
• Your total cost of qualifying property

Here’s the official IRS Form 4562 and instructions.

Work with a tax advisor to make sure you’re reporting correctly and maximizing all eligible deductions. If you’re working with Harness, our team can help connect you with professionals who understand the specifics of tax-smart business growth.

Don’t leave tax savings on the table

Section 179 and bonus depreciation offer rare opportunities to reduce your tax bill while investing in your business’s future. In 2025, the rules are more favorable than ever, giving growing companies extra incentive to modernize their tools, equipment, and systems.

By acting before year-end and planning strategically, you can:

• Lower your 2025 taxable income
• Free up working capital
• Strengthen your infrastructure for long-term growth

At Harness, we help founders, entrepreneurs, and growing businesses make smarter financial moves. From net worth tracking to equity tax planning and dedicated tax prep services, our tools and expert network support your success every step of the way.

Get started with Harness and see how we help you simplify tax season, maximize savings, and stay focused on growing your business.

Want help making the most of Section 179 and other 2025 tax strategies?

Get started with a Harness Tax Advisor and see how our team and tools help growing businesses make smarter financial decisions.

Disclaimer:

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