The Section 199A qualified business income deduction—one of the most significant provisions of the Tax Cuts and Jobs Act for pass-through business owners—is scheduled to expire after December 31, 2025. Unless Congress acts to extend or make permanent this provision, the 20 percent deduction for qualified business income will disappear, resulting in an effective tax increase for millions of business owners who operate through partnerships, S corporations, and sole proprietorships.^[1] With the expiration now approximately two years away, business owners should understand how the deduction works, evaluate its impact on their tax liability, and consider planning strategies to maximize the benefit while it remains available.

How the Deduction Works

Section 199A allows eligible taxpayers to deduct up to 20 percent of their qualified business income from a qualified trade or business operated through a pass-through entity or as a sole proprietorship. The deduction is taken at the individual level, reducing taxable income but not adjusted gross income. For a taxpayer in the 37 percent marginal bracket, the 20 percent deduction effectively reduces the tax rate on qualified business income to 29.6 percent—bringing the pass-through rate closer to the 21 percent corporate rate that was also enacted by the TCJA.^[2]

The deduction is subject to several limitations that vary based on the taxpayer's taxable income and the type of business. For taxpayers with taxable income below a threshold amount ($182,100 for single filers and $364,200 for joint filers in 2023, adjusted annually for inflation), the deduction is generally available without limitation. For taxpayers above the threshold, two limitations may apply: the W-2 wage limitation (which caps the deduction at the greater of 50 percent of W-2 wages paid by the business or 25 percent of W-2 wages plus 2.5 percent of the unadjusted basis of qualified property) and the specified service trade or business (SSTB) limitation.

The Specified Service Trade or Business Limitation

The SSTB limitation is the most significant restriction for many high-income taxpayers. A specified service trade or business is one that involves the performance of services in the fields of health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, or any trade or business where the principal asset is the reputation or skill of one or more employees or owners. For taxpayers above the income threshold, the deduction for SSTB income is phased out and eventually eliminated entirely.^[3]

The SSTB limitation means that many of the professionals who would benefit most from the deduction—attorneys, physicians, accountants, consultants, and financial advisors—are excluded from claiming it once their income exceeds the threshold. This limitation was a deliberate policy choice, reflecting the view that the Section 199A deduction was intended primarily to benefit businesses that produce goods or provide non-professional services, rather than high-income professionals.

Planning Before the Sunset

With the expiration looming, several planning strategies deserve consideration. First, income acceleration may be appropriate for some taxpayers. If the 199A deduction is not extended, business income recognized after 2025 will be taxed at the full individual rate without the 20 percent deduction. Taxpayers who can accelerate income into 2024 or 2025—by billing early, collecting receivables, or recognizing deferred revenue—may benefit from the lower effective rate while the deduction is available.

Second, the W-2 wage limitation may create opportunities for businesses that are currently below the limitation. Because the deduction is capped at 50 percent of W-2 wages (for taxpayers above the income threshold), increasing W-2 wages—by hiring employees, formalizing compensation arrangements, or converting independent contractor relationships to employment—can increase the available deduction. The incremental cost of higher wages (including payroll taxes) must be weighed against the incremental tax savings from the larger deduction.

Third, the expiration of Section 199A should be factored into entity selection decisions. The TCJA's combination of a 21 percent corporate rate and a 29.6 percent effective pass-through rate (with the 199A deduction) made the pass-through structure more tax-competitive with the C corporation structure. If the 199A deduction expires and the pass-through rate reverts to 37 percent (or higher, depending on future legislation), the relative attractiveness of the C corporation form increases. Business owners who are evaluating entity conversions should model the tax implications under both scenarios—deduction extended and deduction expired—before making a decision.^[4]

The Legislative Outlook

Whether Congress will extend Section 199A is uncertain. The provision has broad political support among business groups, and both parties have expressed general support for pass-through tax relief, though they differ on the details. Extension could come as part of a broader TCJA extension package, as a standalone measure, or as part of a comprehensive tax reform bill. Alternatively, Congress could modify the provision—changing the income thresholds, the SSTB categories, or the deduction percentage—rather than extending it in its current form.

The uncertainty about the deduction's future is itself a planning factor. Business owners who are making long-term decisions—entity formation, compensation structuring, retirement plan design—should build flexibility into their plans to account for both scenarios. The worst outcome is making an irreversible decision based on the assumption that the deduction will (or will not) be extended, only to find that Congress does the opposite.

For Mississippi business owners navigating the Section 199A deduction and its potential expiration, our firm provides comprehensive tax planning that accounts for both current law and the range of possible future changes. The goal is to maximize the benefit of the deduction while it exists and to position the business for whatever comes next.^[5]