When a business buys equipment, vehicles, or other long-lived assets, the cost is generally recovered over time through depreciation rather than deducted all at once. Two provisions in the tax code let owners accelerate that recovery, and understanding the difference between them helps in planning major purchases. Todd Muslow, a certified public accountant in Shreveport, Louisiana, walks business owners through how Section 179 expensing and bonus depreciation work and when each one applies.
Section 179 allows a business to deduct the full cost of qualifying property in the year it is placed in service, up to an annual limit set by law. Qualifying property generally includes machinery, equipment, certain vehicles, off-the-shelf software, and some improvements to nonresidential buildings. The deduction is capped each year, and it begins to phase out once total purchases exceed a separate threshold. The provision is aimed at smaller and mid-sized businesses, and the phase-out reflects that focus.
A second limit on Section 179 is income. The deduction cannot create or increase a loss. A business can only apply Section 179 to the extent it has taxable income from active operations. Amounts disallowed because of the income limit carry forward to future years. Todd Muslow points out that this rule makes Section 179 most useful for profitable businesses that want to reduce current taxable income.
Bonus depreciation works differently. It allows a percentage of the cost of qualifying property to be deducted in the first year, and unlike Section 179, it can be applied to create a loss. There is no income limit and no spending cap, which makes bonus depreciation suitable for larger purchases or for businesses that have invested heavily in a given year. The percentage available has been changing under current law, stepping down over a period of years, so the benefit in any given year depends on the rules in effect at that time.
Owners often ask which provision to apply first. Section 179 is generally elected before bonus depreciation, and the two can be combined. A business might apply Section 179 up to its useful limit, claim bonus depreciation on additional qualifying assets, then depreciate any remaining basis under the standard schedule. Todd Muslow models these combinations so owners can see the effect on both the current year and future returns.
Timing is part of the analysis. Because these deductions accelerate cost recovery, they reduce taxable income now at the expense of deductions later. For a business expecting higher income in future years, spreading depreciation forward may produce a better overall result than claiming everything immediately. For a business with strong current income and uncertain future earnings, accelerating the deduction may be the better choice.
State treatment adds another consideration. Not every state conforms to the federal rules on bonus depreciation, and some limit Section 179. A deduction that reduces a federal return may be added back at the state level, creating a difference owners should anticipate. Todd Muslow reviews both layers before recommending an approach.
Recordkeeping supports the deduction. The date an asset is placed in service, its cost, and its business use percentage all matter, particularly for vehicles and assets used partly for personal purposes. These provisions reward planning. A purchase made late in the year still qualifies if the asset is placed in service before year-end, which gives owners a window to evaluate their position and decide whether accelerating a purchase makes sense. Todd Muslow connects equipment decisions to the broader tax picture, treating depreciation strategy as one element of a structured approach to managing taxable income across years.