100% Bonus Depreciation and the Expanded Section 179: Qualifying Purchases, Timing, and Tradeoffs

by Oct 21, 2026Blog, Tax

Key Takeaways 

  • Permanent 100% bonus depreciation and the expanded Section 179 deduction limits of $2.5 million for 2025 and $2.56 million for 2026, adjusted for inflation, can create meaningful tax savings on qualifying business investments. 
  • The deduction generally depends on when an asset is placed in service, not simply when it is ordered or paid for. 
  • Your CPA can help determine whether accelerating a purchase strengthens cash flow and profitability or simply moves a deduction forward. 

Imaging equipment in a dental office, commercial ovens in a restaurant, laptops and software for a professional services firm, delivery vans for a distributor, a renovated retail interior, or new machinery on a manufacturing floor can all represent significant capital investments. For 2026, permanent 100% bonus depreciation and an expanded Section 179 limit give business owners more options for deducting qualifying purchases sooner. The opportunity extends well beyond construction equipment and heavy machinery. The key is understanding what qualifies, making smart timing decisions, weighing the opportunities against the tradeoffs, and working with your CPA to determine whether an investment makes financial sense. 

What Qualifies for Section 179? 

Section 179 can apply to a wide range of property used to run a business, not just heavy equipment.  In general, qualifying property must be used by more than 50% for business purposes and placed in service during the tax year. Property can be new or used, as long as you have not used it previously and did not acquire it from a related party. Qualifying purchases may also be financed rather than paid entirely in cash. 

That creates opportunities across many industries: 

  • Medical and dental practices: imaging systems, computers, office equipment, and furniture. 
  • Restaurants: commercial ovens, refrigeration equipment, computers, and other business equipment. 
  • Law firms and professional services: laptops, monitors, office furniture, phone systems, and qualifying off-the-shelf software. 
  • Retail businesses: point-of-sale computers, display and office equipment, security systems, and certain improvements to commercial space. 
  • Distributors and logistics companies: delivery vans, trucks, warehouse racks, conveyors, and computer equipment. 
  • Manufacturers: production machinery, industrial tools, warehouse systems, and specialized equipment. 
  • Construction and agricultural businesses: Jobsite machinery, specialized tools, work vehicles (subject to special vehicle deduction limits), and other qualifying business equipment. 

Certain improvements to nonresidential property may also qualify. Roofing, HVAC, fire protection and alarm systems, and building security systems may be eligible for Section 179 deductions, but generally not bonus depreciation. Some interior renovations to existing commercial space may qualify for both Section 179 and bonus depreciation when they meet the requirements for qualified improvement property. 

Because eligibility depends on the type of property, how it is used, when it is placed in service, and applicable deduction limits, including taxable business income, your CPA should review major purchases and renovation costs before you assume they qualify. 

Why Does the Placed in Service Date Matter? 

The deduction generally depends on when the asset is ready and available for business use. Ordering equipment in December or paying an invoice before year end may not be enough if the asset is delivered, installed, or operational the following year. 

For 100% bonus depreciation, the acquisition date also matters. The full deduction generally applies to qualifying property acquired after January 19, 2025. Property purchased under a binding written contract entered into before January 20, 2025, may be subject to the previous depreciation rules, even if placed in service in 2026. 

Before assuming a purchase will qualify for a 2026 deduction, confirm: 

  • When the equipment will be delivered 
  • Whether installation or testing is required 
  • When employees can begin using it 
  • Whether records clearly support the placed in-service date 

This distinction makes year end planning especially important for assets with long delivery schedules or complex installations, or purchase agreements signed in earlier years. 

What Are the Opportunities and Tradeoffs? 

The biggest opportunity is accelerating deductions and improving short-term cash flow that might otherwise be spread over several years. That can reduce current taxable income and preserve cash that can be reinvested in operations, hiring, debt reduction, or other priorities. 

However, faster depreciation is not automatically better. Business owners should consider: 

  • Whether purchase is necessary for growth or efficiency 
  • How investment affects working capital 
  • Whether financing costs change the economics 
  • Whether taking a larger deduction today reduces useful deductions in future years 
  • How investment affects margins and the pricing needed to support ongoing profitability 

A tax deduction should improve an already sound business decision, not justify spending that does not create sufficient value. 

How Can Owners Decide Whether to Buy Before Year End? 

Owners should evaluate the purchase based on its operational return first and its tax benefits second. Consider whether the equipment increases capacity, reduces labor costs, improves customer service, replaces an unreliable asset, or opens a new revenue opportunity. 

Then compare those benefits with the full cost of ownership, including financing, maintenance, training, insurance, and effects on cash flow. This helps distinguish a strategic investment from a purchase made primarily to capture a deduction. 

Your CPA’s Role in Year-End Equipment Planning 

Your CPA should be the expert you lean on when evaluating year-end equipment purchases. The rules around 100% bonus depreciation and Section 179 can be valuable, but the best choice depends on your tax position, cash flow, future income, and broader business plan. 

Your CPA can help you: 

  • Determine whether a purchase qualifies. 
  • Compare bonus depreciation with Section 179, including their different income limitations. 
  • Evaluate whether taking the largest deduction now makes sense. 
  • Confirm placed-in-service requirements. 
  • Review of financing and cash flow impacts. 
  • Coordinate the purchase with forecasts, margins, and future tax planning. 

Note that Section 179 deductions are limited by taxable business income, with unused amounts generally carried forward to future years. Bonus depreciation does not have this income limitation and can create a tax loss. Understanding this distinction can help you and your CPA determine which approach best supports your current and future tax planning.  

This guidance is especially important when you are considering multiple large purchases or expect income to change from one year to the next. Rather than making a decision based on the deduction alone, work with your CPA to understand how the purchase fits into your overall financial strategy. 

What Should You Do Before Making a Year-End Purchase? 

Start by discussing planned purchases with your CPA before signing contracts or relying on a tax deduction in your budget. Providing expected costs, delivery dates, financing terms, and projected business use gives your advisor enough information to model the options. 

State tax rules can also differ from federal rules. Many states, including New Jersey, do not follow federal bonus depreciation provisions, and some impose lower Section 179 limits, potentially reducing state tax savings.  

The goal is not simply to maximize this year’s deduction. It is to make an investment that improves the business while using available tax incentives efficiently. 

Ready to evaluate a year end equipment purchase? Talk with your CPA before committing capital so you can understand the tax impact, cash flow effect, and long-term return on the investment. 

Frequently Asked Questions

Does equipment have to be paid for by December 31?

Not necessarily. The more important issue is generally whether the asset has been placed in service and is ready and available for business use.

Can used equipment qualify for bonus depreciation?

Yes, qualifying used property can be eligible. This gives owners more flexibility when comparing new and preowned equipment.

Can interior renovations qualify?

Certain interior improvements to existing commercial property may qualify as qualified improvement property. Your CPA can help determine which project costs meet the applicable requirements.

Should I buy equipment just to receive the tax deduction?

Generally, no. The purchase should make operational and financial sense first, with the tax deduction improving the return rather than driving the decision.

author avatar
Tim Streeter, CPA
I help business owners find success with straight talk and advocacy.