Do You Own a Specified Service Trade or Business? If So, Your 20% Flow-Through Tax Deduction May Be Limited
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Article Highlights: 20% Flow-Through Deduction Qualified Trade or Business Specified Service Trade or Business Deduction Table Listing of Service Businesses As part of its recent tax reform, Congress included a new 20% deduction of pass-through income for trades or businesses other than C-corporations. This pass-through income is referred to as qualified business income (QBI); for trades or businesses, it generally includes bottom-line profits, and for S-corporations and partnerships, it includes K-1 flow-through income. This new law was added as tax code section 199A, so the deduction is often referred to as the 199A deduction. Congress added this deduction to benefit sole proprietors, partners, and S-corporation shareholders (among others); the goal is to allow for benefits equivalent to the substantial tax-rate cut that the same reform provided to C-corporations. However, this new deduction is not applied uniformly to all types of trades and businesses, for which there are two categories: qualified trades or businesses (QTBs) and specified service trades or businesses (SSTBs). This deduction is limited by the taxpayer’s filing status and 1040 taxable income, and it differs depending on whether the business is a QTB or a SSTB. Although the main purposes of this article are to define SSTBs and to describe how they are taxed differently from QTBs, if one is to understand why an SSTB may not qualify for the deduction, whereas a QTB might qualify, it is necessary to first understand the basic differences between the deductions for SSTBs and QTBs. Apparently, Congress considered the income from service businesses to be akin to wages and didn’t want taxpayers who provide services to have the benefit of the 20% deduction instead of paying taxes on that income as ordinary wages. This change was primarily aimed at deterring high-income people from becoming independent contractors or setting up pass-through businesses so that they could turn their wages into business income and get the 20% deduction. The result is a phase-out of the deduction for high-income taxpayers who have income from SSTBs. The table below provides an overview of the tax treatment for each type of business. As you will note, the SSTB deduction phases out for higher levels of 1040 taxable income, but the QTB deduction does not. This type of phase-out is called a wage limitation. Example of How to Use the Table: Two married people who are filing jointly have 1040 taxable income (before the 199A deduction) of $469,000; they also have a SSTB. They would first select the box with their filing status (“Married Filing a Joint Return”), then move to the right to the correct range of 1040 taxable income (which is the adjusted gross income after removing either the standard deduction or the itemized deductions; in this case, “Greater than $415,000”), and finally follow that column down to the cell aligned with the correct type of business (“SSTB”). In this case, the trade or business does not qualify for the 199A deduction. Taxpayer’s Filing Status Taxable Income(Before the 199A deduction) Married Filing a Joint Return Less Than $315,000 Between $315,000 and $415,000 Greater than $415,000 Other filing Statuses Less Than $157,500 Between $157,500 and $207,500 Greater than $207,500 Type of Business The 199A Deduction SSTB 20% of QBI Deduction phased out No deduction allowed QTB 20% of QBI Wage limitation phased in Deduction equal to the lesser of 20% of QBI or the wage limitation Specified Service Trades or Businesses (SSTBs) The IRS describes SSTBs as being in the following fields: Health – The health category includes the provision of services by physicians, pharmacists, nurses, dentists, veterinarians, physical therapists, psychologists, and similar health care professionals who provide medical services directly to patients. However, this excludes the provision of services that are not directly related to a medical field, even when those services purportedly relate to the health of the service recipient. For example, this category excludes the operation of health clubs or spas that provide physical exercise or conditioning; health-related payment processing; or the research, testing, manufacture, and/or sales of pharmaceuticals or medical devices. Law – The law category refers to the provision of services by lawyers, paralegals, legal arbitrators, mediators, and similar professionals in their capacities as such. The category excludes the provision of services that do not require skills unique to the field of law, such as the printing, delivery, and stenography services provided to lawyers. Accounting – The accounting category includes the provision of services by accountants, enrolled agents, tax-return preparers, financial auditors, and similar professionals in their capacities as such. This category is not limited to services that require state licensure as a certified public accountant. This category also excludes payment processing and billing analysis. Actuarial Science – The actuarial science category refers to the provision of services by actuaries and similar professionals in their capacities as such. This category only includes the services provided by analysts, economists, mathematicians, and statisticians if they are engaged in analyzing or assessing financial costs due to risk or uncertainty. Performing Arts – The performing arts category includes the performance of services by individuals who participate in the creation of the performing arts, including actors, singers, musicians, entertainers, directors, and similar professionals in their capacities as such. It excludes services that do not require skills that are unique to the creation of performing arts, such as the maintenance and operation of equipment or facilities. Similarly, the dissemination of video or audio of performing-arts events to the public is not considered to be a service in the performing arts. Athletics – The athletics category refers to the performance of services by individuals who participate in athletic competitions, including athletes, coaches, and team managers in sports such as baseball, basketball, football, soccer, hockey, martial arts, boxing, bowling, tennis, golf, skiing, snowboarding, track and field, billiards, and racing. This category excludes the provision of services that do not require skills that are unique to athletic competition, such as the maintenance and operation of equipment or facilities for use in athletic events. It also excludes the provision of services by persons who disseminate video or audio of athletic events to the public. Consulting – The consulting category refers to the provision of professional advice and counsel to clients to assist them in achieving goals and solving problems. Consulting professionals include lobbyists and similar professionals, but this category focuses on their capacities as such and excludes the minor consulting that accompanies the sale of a product. A trade or businesses cannot be an SSTP if less than 10% of its gross receipts are from consulting (or 5% if the company’s gross receipts are greater than $25 million). Financial services – The category of financial services applies to services that are typically performed by financial advisors and investment bankers, including the following financial services: managing wealth; advising clients with respect to their finances; developing retirement and wealth-transition plans; providing advisory and other services regarding valuations, mergers, acquisitions, dispositions, and restructurings (including in title 11 bankruptcies and similar cases); and raising financial capital through underwriting or by acting as a client’s agent in the issuance of securities. This includes the services provided by financial advisors, investment bankers, wealth planners, retirement advisors, and similar professionals but excludes banking services such as deposit-taking or loan-making. Brokerage Services – The brokerage services category includes services in which a person arranges transactions between a buyer and a seller with respect to securities and in exchange for a commission or fee. This includes services provided by stock brokers and similar professionals but excludes services provided by real estate or insurance agents and brokers. Reputation or Skill – The original legislation’s list of SSTBs included trades or businesses for which the principal asset was the reputation or skill of one or more of employees or owners. However, it was unclear if this meant, for example, that a self-employed plumber who provided his skill to the business would be eligible for the 199A deduction. The taxpayer-friendly interpretation of these tax regulations has generally defined “reputation and skill” to mean: (1) The receipt of income in exchange for endorsing products or services for which the individual provides endorsement services; (2) The receipt of licensing income in exchange for the use of an individual’s image, likeness, name, signature, voice, trademark, or any other symbol associated with that individual’s identity; or (3) The receipt of appearance fees or income (including fees or income paid to reality performers who appear as themselves on television, social media, or other forums; radio, television, and other media hosts; and video game players).
Tax and Financial Insights
by NR CPAs & Business Advisors


2026 IRS Mileage Rates: Key Updates and Insights
The IRS has rolled out the inflation-adjusted mileage rates for 2026, offering taxpayers an efficient way to claim deductions for vehicle-related expenses incurred for business, charity, medical, or moving purposes. These adjustments reflect the continued economic shifts impacting car operation costs.
Effective January 1, 2026, the new standard mileage rates are established as follows:
- Business Travel: Increased to 72.5 cents per mile, inclusive of a 35-cent-per-mile depreciation allocation. This marks a rise from the 70 cents per mile rate set for 2025
- Medical/Moving Purposes: Reduced slightly to 20.5 cents per mile, down from 21 cents in the previous year, reflecting the variable cost considerations.
- Charitable Contributions: Consistent at 14 cents per mile, a fixed rate unchanged for over a quarter-century.
As is typical, the business mileage rate considers the integral fixed and variable costs of automobile operation. Meanwhile, the medical and moving rates remain contingent on variable expenses as determined by the IRS study.

It is critical to note that the One Big Beautiful Bill Act (OBBBA) held firm on disallowing moving expense deductions except for specific cases within the Armed Forces and intelligence community, marking a substantial shift since 2017.
When engaging in charitable work, taxpayers might opt for a direct expense deduction over the per-mile method, covering gas and oil costs. However, comprehensive upkeep and insurance costs are non-deductible expenses.
Business Vehicle Use Considerations: Taxpayers can alternatively compute vehicle expenses using actual costs, which might benefit from shifting depreciation rules, particularly through bonuses and first-year advantages. Keep in mind, however, reverting from actual cost calculations to standard rates in subsequent years is restricted, particularly per vehicle protocol and when exceeding four vehicles in concurrent use.

Additionally, parking, tolls, and property taxes attributable to business can be deducted independently of the general rate, an often-overlooked advantage by many business owners.
Tax Strategies for Employers and Employees: Reimbursements based on the standard mileage framework, providing the right documentation is in place, remain tax-free for employees. Meanwhile, the elimination and continued prohibition of unreimbursed employee deductions continue, with particular exceptions offered to qualified personnel across specific occupations.
Opportunities for Self-employed Individuals: Entrepreneurs remain eligible for deductions on business-related vehicle use via Schedule C, with potential to account for business-use interest on auto loans.

Heavy SUVs and Deduction Advantages: Heavier vehicles exceeding 6,000 pounds but under 14,000 pounds open opportunities for substantial tax deductions through Section 179 and bonus depreciation avenues. The lifecycle of such a vehicle bears implications on recapturing initially claimed deductions, urging cautious tax planning.
For professional guidance on optimizing your vehicle-related tax deductions and understanding their implications on tax strategies, contact our office in Coral Gables, Florida, where expert advice and strategic insights are just a call away.


Educator's Deduction Reform: Key Changes Under OBBBA
The One Big Beautiful Bill Act (OBBBA) introduces significant enhancements for educators' tax deductions starting in 2026, offering both strategic opportunities and planning considerations for educators who qualify. With the reinstated itemized deduction for qualified unreimbursed expenses, educators have a broader spectrum of financial relief. This is complemented by the retention of the $350 above-the-line deduction, allowing educators to maximize their tax benefits by selectively allocating expenses between these avenues.
Understanding the nuances of these changes is crucial for educators and financial advisors alike. The dual-option deduction strategy can potentially enhance tax efficiency, thereby aligning with broader financial planning goals.

At NR CPAs & Business Advisors, based in Coral Gables, Florida, our expertise in tax preparation and planning provides invaluable support to educators navigating these changes. Our comprehensive approach, combined with personalized advice from our experienced team, ensures compliance and optimization in line with the latest tax legislations.
Given these updates, it is imperative to engage with seasoned professionals to fully leverage your deduction strategies. Contact us today to streamline your tax planning under OBBBA's new guidelines and maximize your deductions for upcoming tax years.


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