Heading into the 2026 tax season, depreciation is one of the areas the One Big Beautiful Bill Act changed most. The law, signed July 4, 2025, brought back 100 percent bonus depreciation on a permanent basis and raised the Section 179 limits. Understanding how the two work together now matters more than it has in years. Depreciation allows businesses to recover the costs of their investments in tangible property by writing off these costs over the asset's useful life. This article dives into key depreciation strategies, including the use of Section 179, bonus depreciation, and the Modified Accelerated Cost Recovery System (MACRS), offering insights to help small tax firms leverage these tools effectively.
Depreciation is a method to allocate the cost of tangible assets over their useful life. It acknowledges the wear and tear or obsolescence of the asset, allowing businesses to match the expense with the revenue generated from the asset. This process is crucial for accurate financial reporting and tax planning.
The Section 179 deduction serves as a robust tax-saving tool for small and medium-sized businesses, allowing them to deduct the full purchase price of qualifying equipment and software purchased or financed during the tax year. For 2026, the maximum deduction is $2.56 million, and the phase-out threshold begins at $4.09 million. The OBBBA raised these limits: the 2025 cap was $2.5 million with a $4 million phase-out, up from $1.22 million and $3.05 million the year before.
Section 179 can be applied to a wide range of tangible business assets, including machinery, office equipment, vehicles, and software. However, certain limitations and rules apply:
Taxable Income Limitation: The total amount of Section 179 deduction cannot exceed the business's taxable income for the year. Any excess can be carried forward to future years.
Phase-Out Rule: The deduction begins to phase out on a dollar-for-dollar basis after $4.09 million of qualifying property is placed in service in 2026. This means that businesses with substantial capital expenditures need to carefully plan their purchases to maximize deductions.
Special Limits for Vehicles: The maximum Section 179 deduction for sport utility vehicles between 6,000 and 14,000 pounds is capped at $32,000 for 2026. Bonus depreciation, covered below, does not carry this SUV cap, so a heavy SUV can still be fully expensed in year one through 100 percent bonus depreciation.
Maximizing the Section 179 deduction requires strategic planning. Businesses should prioritize capital investments in qualifying property, especially towards the end of the tax year, to ensure they can take full advantage of the immediate expensing benefits. This strategy can significantly reduce taxable income and improve cash flow, providing businesses with more capital to reinvest in growth and operations.
For example, if a business purchases $1 million worth of machinery in December 2026, it can immediately deduct the entire amount under Section 179, assuming it has sufficient taxable income to absorb the deduction. This immediate write-off can result in substantial tax savings and a lower overall tax liability for the year.
One effective strategy is to combine Section 179 with bonus depreciation. Businesses can first apply the Section 179 deduction up to the maximum allowable limit and then use bonus depreciation to deduct a significant portion of the remaining cost. This layered approach ensures that businesses can maximize their deductions and reduce their tax liabilities efficiently.
Bonus depreciation is a powerful tax provision that allows businesses to deduct a substantial portion of the cost of qualifying assets in the first year they are placed in service. For property acquired and placed in service after January 19, 2025, the bonus depreciation rate is 100 percent, and the OBBBA made that rate permanent. This reversed the phase-down that had dropped the rate to 60 percent in 2024 and would have taken it to zero by 2027.
One timing point matters. Property acquired under a written binding contract dated before January 20, 2025 stays on the old schedule, which means 40 percent for assets placed in service in 2025, even when the asset is placed in service after the cutoff. Both the acquisition date and the placed-in-service date have to fall after January 19, 2025 to reach the full 100 percent.
Bonus depreciation applies to most tangible depreciable business assets, including machinery, equipment, and certain types of software. Unlike Section 179, which has more stringent limitations and eligibility criteria, bonus depreciation can be applied to both new and used property as long as it is new to the taxpayer. This flexibility makes bonus depreciation a valuable tool for businesses looking to upgrade or expand their operations without being restricted by the newness of the assets.
The strategic use of bonus depreciation can lead to significant tax savings. By allowing businesses to deduct 100 percent of the cost of qualifying assets in the first year, bonus depreciation accelerates the recovery of investment costs, thereby reducing taxable income substantially in the year the asset is placed in service. This can be particularly advantageous for businesses that have large capital expenditures and are looking to manage cash flow effectively.
For example, a business that buys a $500,000 piece of machinery and places it in service after January 19, 2025 can deduct the full $500,000 under 100 percent bonus depreciation in year one. This large upfront deduction can lower the business's taxable income significantly, freeing up capital that can be reinvested into the business or used to cover operational costs.
One of the most effective strategies for maximizing tax savings is to combine bonus depreciation with Section 179 deductions. Businesses can first apply the Section 179 deduction to the maximum allowable amount and then use bonus depreciation for the remaining balance of the asset's cost. This layered approach ensures that businesses can take full advantage of both provisions, maximizing their deductions and reducing their tax liabilities.
For instance, a business that places $3 million of qualifying assets in service can expense up to the $2.56 million Section 179 cap, then apply 100 percent bonus depreciation to the remaining balance, writing off the rest in the same year.
For several years bonus depreciation was on a path to disappear, falling from 100 percent to 80, then 60, with zero scheduled for 2027. The OBBBA ended that path and locked the rate at 100 percent with no expiration. For asset-heavy clients, that turns a closing window into a standing planning tool, and it pairs directly with the QBI question, since a large bonus deduction lowers qualified business income and can move a client across a QBI threshold.
While bonus depreciation offers significant tax benefits, it is essential for businesses to maintain accurate records and comply with IRS regulations to ensure that they qualify for these deductions. Proper documentation of asset purchases, including invoices and receipts, as well as detailed depreciation schedules, can help businesses avoid issues during tax filing and potential audits.
The Modified Accelerated Cost Recovery System (MACRS) is the primary method of depreciation used in the United States for tax purposes. This system allows businesses to recover the cost of their tangible property over a specified life span through annual deductions. The MACRS system is designed to accelerate the depreciation of assets, providing larger deductions in the earlier years of an asset's life, which can be beneficial for businesses looking to reduce taxable income sooner.
Key Features of MACRS
MACRS divides assets into different property classes, each with a designated depreciation period. The main classes and their corresponding depreciation periods are:
MACRS uses two primary methods for calculating depreciation:
To calculate depreciation using MACRS, follow these steps:
Consider a business that purchases office equipment (5-year property) for $10,000. Using the GDS method with the half-year convention, the depreciation schedule would be calculated as follows:
This schedule allows the business to recover the cost of the office equipment over six years, with the majority of the depreciation taken in the first two years.
MACRS provides several benefits:
For tax professionals, understanding and effectively implementing depreciation strategies can significantly impact clients' tax liabilities. Here are some steps to maximize the benefits of depreciation:
As tax laws and regulations continue to evolve, staying informed and proactive is key to leveraging depreciation strategies effectively. TaxPlanIQ can help tax professionals navigate these complexities, offering curated tax strategies, easy-to-understand implementation steps, and potential tax savings for clients. By signing up for a free demo, you can explore how TaxPlanIQ can transform your tax planning services, providing high-value, scalable solutions for your firm.
Depreciation strategies are crucial for tax planning, offering significant opportunities for tax savings. By understanding and effectively applying Section 179, bonus depreciation, and MACRS, tax professionals can enhance their service offerings and provide substantial value to their clients. Embrace these strategies and tools like TaxPlanIQ to stay ahead in the competitive landscape of tax advisory services.
By following these strategies, tax professionals can not only help their clients save money but also position their firms for growth and success in the ever-changing tax landscape.
Scenario: Emily owns a consulting firm and buys a new SUV in 2026 for business use. The SUV has a gross vehicle weight rating over 6,000 pounds, cost $70,000, and is used entirely for the business.
Tax Savings Calculation: Section 179 alone would cap the deduction on a heavy SUV at $32,000 for 2026. The full write-off comes from 100 percent bonus depreciation, which carries no SUV cap. Because the vehicle is acquired and placed in service after January 19, 2025 and is used more than 50 percent for business, Emily can deduct the entire $70,000 in year one.
Tax Savings: With the SUV costing $70,000 and a 21 percent tax rate, Emily deducts the entire cost in 2026. Tax savings = 21% × $70,000 = $14,700.
Cost Efficiency:
Year 1 ROI:
Using the ROI Method of Value Pricing tax planning services like this, the tax advisor could easily charge several thousand for their help, while also still netting over ten thousand to the client.
Is bonus depreciation still available in 2026?
Yes. Bonus depreciation is back at 100 percent, and the One Big Beautiful Bill Act made that rate permanent for qualified property acquired and placed in service after January 19, 2025. There is no longer a scheduled phase-out, so businesses can plan around full first-year expensing every year rather than racing a deadline.
What is the difference between Section 179 and bonus depreciation?
Both let a business deduct the cost of qualifying assets in year one, but they work differently. Section 179 has an annual dollar cap, $2.56 million for 2026, and cannot create a loss, and you pick which assets to apply it to. Bonus depreciation has no dollar limit, applies automatically to whole asset classes unless you elect out, and can push a business into a loss. Many businesses apply Section 179 first, then bonus depreciation to the remaining cost.
What is the Section 179 deduction limit for 2026?
For 2026, the Section 179 maximum is $2.56 million, and the deduction begins to phase out once a business places more than $4.09 million of qualifying property in service. A separate cap of $32,000 applies to sport utility vehicles between 6,000 and 14,000 pounds.
Can you fully write off an SUV over 6,000 pounds in 2026?
Often yes, but not through Section 179 alone. Section 179 caps the deduction on a heavy SUV at $32,000 for 2026. The rest of the cost can be written off using 100 percent bonus depreciation, which carries no SUV cap, as long as the vehicle is used more than 50 percent for business and is acquired and placed in service after January 19, 2025.
Does bonus depreciation reduce the QBI deduction?
Yes. Bonus depreciation lowers a business's net income, and that same income figure feeds the qualified business income deduction. A large bonus deduction can shrink QBI, and in some cases push it negative. For an owner near a QBI threshold, that interaction can either help or hurt, so the two deductions should be modeled together before a return is filed.
What property qualifies for 100% bonus depreciation?
Bonus depreciation applies to tangible property with a recovery period of 20 years or less, such as machinery, equipment, vehicles, furniture, and certain software. It covers both new and used property, as long as the asset is new to the taxpayer and bought in an arm's-length purchase. The components a cost segregation study pulls out of a building also qualify.
How can accountants use bonus depreciation to start offering tax planning?
Depreciation is one of the most concrete entry points into advisory work. An accountant can model a client's planned equipment or property purchases, show the first-year deduction under 100 percent bonus depreciation, and put a dollar figure on the tax saved. That conversation moves the relationship from filing a return after the fact to shaping decisions before they happen, which is the heart of tax planning.
Is depreciation a good entry point for accountants moving into advisory work?
Yes, for a simple reason: the savings are quantifiable and easy to show. A depreciation deduction produces a clear first-year number a client can see. That makes it straightforward to present the value of the engagement and to price the work against the savings delivered. Software like TaxPlanIQ builds the client-ready report, so the analysis is extremely fast.