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Economic and Budgetary Effects of Permanent Bonus Expensing

6 min readBy: Alan Cole

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Key Findings

  • Fifty percent bonus expensing allows all businesses to immediately deduct (expense) half of their investment in equipment and software, unlike the current depreciationDepreciation is a measurement of the “useful life” of a business asset, such as machinery or a factory, to determine the multiyear period over which the cost of that asset can be deducted from taxable income. Instead of allowing businesses to deduct the cost of investments immediately (i.e., full expensing), depreciation requires deductions to be taken over time, reducing their value and discouraging investment. system that delays these deductions for years or decades.
  • Bonus expensing represents an important step toward full expensingFull expensing allows businesses to immediately deduct the full cost of certain investments in new or improved technology, equipment, or buildings. It alleviates a bias in the tax code and incentivizes companies to invest more, which, in the long run, raises worker productivity, boosts wages, and creates more jobs. , which economists recognize to be ideal for investment and economic growth.
  • We find that extending 50 percent bonus expensing on a permanent basis would boost the long-term level of GDP by over 1 percent, the capital stock by over 3 percent, wages by about 1 percent, and would create 214,000 jobs.
  • Due to the growth in wages and incomes, the ultimate cost to the treasury over ten years is less than a quarter of the revenue impact without growth.


Congress is currently debating the taxA tax is a mandatory payment or charge collected by local, state, and national governments from individuals or businesses to cover the costs of general government services, goods, and activities. extenders bill, which is a set of about 50 tax provisions that routinely expire and are then renewed again on a temporary basis. The tax extenders are currently expired for the calendar year of 2015, but they could be renewed at any time prior to the start of tax filing season. Not all of these are useful tax provisions worth keeping, but one of these—bonus expensing—stands out as an especially effective policy.[1]

In contrast to many extenders that apply narrowly, resembling government spending programs, bonus expensing, also known as bonus depreciationBonus depreciation allows firms to deduct a larger portion of certain “short-lived” investments in new or improved technology, equipment, or buildings in the first year. Allowing businesses to write off more investments partially alleviates a bias in the tax code and incentivizes companies to invest more, which, in the long run, raises worker productivity, boosts wages, and creates more jobs. , is broadly applicable and has the additional benefit of allowing businesses to more accurately report their incomes. These aspects, combined with its powerful growth effects, make bonus expensing the most helpful tax extender. Bonus expensing allows all businesses to immediately deduct a portion of investment expenses instead of the usual treatment that requires businesses to delay these deductions for years or decades based on a complicated system of depreciation by asset and industry.[2]

Bonus expensing allows 50 percent of investment in equipment and software to be deducted immediately (expensed), with the remainder deducted in the usual manner. Investment in structures or anything that is currently written off over more than 20 years is not included under this provision.

Over the years, Congress has been conflicted about the merits of bonus expensing, which may explain why it is often passed on a temporary basis. However, in recent years, both the Tax Foundation and the Joint Committee on Taxation (JCT) have done macroeconomic analysis of the provision, more clearly showing the benefits of the policy.[3] We provide here the results from modeling a permanent extension of 50 percent bonus expensing.

Bonus Expensing Boosts GDP by Increasing the Capital Stock

Using our Taxes and Growth (TAG) Model to trace the effects of bonus expensing on the economy and the budget over the long run, we find that, made permanent, it would boost GDP by over 1 percent by the end of the budget period. The modification to cost recoveryCost recovery is the ability of businesses to recover (deduct) the costs of their investments. It plays an important role in defining a business’ tax base and can impact investment decisions. When businesses cannot fully deduct capital expenditures, they spend less on capital, which reduces worker’s productivity and wages. would increase the incentive to save and invest. The capital stock would increase by over 3 percent by 2025, making workers more productive. The higher productivity from capital deepening would raise wages by about 1 percent and create about 214,000 jobs.

Table 1. Economic Effects of Extending Bonus Expensing on a Permanent Basis
GDP 1.1%
Private business stocks 3.3%
Wage rate 1.0%
Full-time equivalent jobs (in thousands) 214

The federal budget would benefit as well. While the change in the taxable incomeTaxable income is the amount of income subject to tax, after deductions and exemptions. For both individuals and corporations, taxable income differs from—and is less than—gross income. base would reduce corporate income taxA corporate income tax (CIT) is levied by federal and state governments on business profits. Many companies are not subject to the CIT because they are taxed as pass-through businesses, with income reportable under the individual income tax. revenues—and, to a lesser extent, individual income taxAn individual income tax (or personal income tax) is levied on the wages, salaries, investments, or other forms of income an individual or household earns. The U.S. imposes a progressive income tax where rates increase with income. The Federal Income Tax was established in 1913 with the ratification of the 16th Amendment. Though barely 100 years old, individual income taxes are the largest source of tax revenue in the U.S. revenue—these changes have important effects on the economy as a whole. Some of these, such as increased wages, are more important from a budgetary perspective than the deductions for business capital costs. As the economy grows and wages increase, higher income and payroll taxA payroll tax is a tax paid on the wages and salaries of employees to finance social insurance programs like Social Security, Medicare, and unemployment insurance. Payroll taxes are social insurance taxes that comprise 24.8 percent of combined federal, state, and local government revenue, the second largest source of that combined tax revenue. receipts substantially mitigate the revenue impact of the provision in the budget window. These results are shown in Table 2 (below).

Table 2. Budgetary Effects of Extending Bonus Expensing on a Permanent Basis, 2015-2024 (in Billions of Dollars)
Tax Revenue Impact Due to Tax Changes Revenue Impact Including Macroeconomic Effects
Individual Income Taxes -68 65
Payroll Taxes 0 84
Corporate Income Taxes -268 -241
Excise Taxes 0 7
Other Revenues 0 12
Total -336 -74

These results have some similarities and some differences with the JCT macroeconomic analysis of the same policy provision. Using the Macroeconomic Equilibrium Growth (MEG) model, the JCT also found GDP growth from this measure due to higher investment:[4]

The proposal increases the expected after-tax return on investment in targeted depreciable property by allowing firms to deduct a larger share of their capital expenditures in the year of their purchase, relative to present law. This increase in after-tax returns on investment in business equipment and certain other depreciable property is expected to provide an incentive for an increase in savings and investment, resulting in an increase in business capital stock and the overall size of the economy, as measured by gross domestic product (‘‘GDP’’).

However, the MEG model finds a smaller effect than the TAG model. For example, the MEG model finds a 0.3% total increase in GDP by the end of the budget period, compared with a 1.1% increase in GDP from the TAG model. The most straightforward reason for this difference is that JCT expects that fewer businesses would be able to take advantage of the policy than the Tax Foundation does. JCT’s analysis estimates that approximately 40 percent of investments will be eligible for the provision; the Tax Foundation puts that number closer to 70 percent.

There are also some differences in economic assumptions. For example, the MEG model has a substitution effect: the new investments from bonus expensing soak up capital that would have been used by other kinds of investments, such as housing. In contrast, the TAG model increases capital inflows from abroad, allowing the U.S. to invest in both.

No two economic models are exactly alike, but it is important to take notice when a consensus develops; both models predict that bonus expensing will increase the capital stock, wages, and GDP.


The public is best served by a stable, predictable tax code. The idea of tax extenders—of temporary provisions that exist in limbo—is not the stuff of sound tax policy. It makes sense, therefore, to decide once and for all which provisions are allowed to become permanent and which are allowed to expire.[5] Bonus expensing is the best of these provisions. In a macroeconomic analysis of the extenders as a whole, JCT takes special note to mention expensing as the one that promotes growth.[6]

As the benefits of macroeconomic analysis make the benefits of this tax provision clear, the case for making it permanent grows ever stronger.

[1] Andrew Lundeen & Kyle Pomerleau, Not All Tax Extenders Are Worth Extending, Tax Foundation Tax Policy Blog, Jan. 22, 2014,

[2] Stephen J. Entin, The Tax Treatment of Capital Assets and Its Effect on Growth: Expensing, Depreciation, and the Concept of Cost Recovery in the Tax System, Tax Foundation Background Paper No. 67, Apr. 24, 2013,

[3] Joint Committee on Taxation, Macroeconomic Analysis for Bonus Depreciation Modified and Made Permanent, July 15, 2014,

[4] Id.

[5] Alan Cole, Tax Extenders: Take Them or Leave Them, Tax Foundation Tax Policy Blog, Nov. 25, 2014,

[6] Joint Committee on Taxation, A Report To The Congressional Budget Office Of The Macroeconomic Effects Of The “Tax Relief Extension Act Of 2015,” As Ordered To Be Reported By The Senate Committee On Finance, Aug. 4, 2015,