Every guidance piece published about the no-tax-on-tips deduction under IRC Section 224 assumes the reader works at a restaurant, hotel, casino, or salon. The employer is obviously in the hospitality or food service business. The employees obviously receive customer tips. The TTOC codes obviously apply.
That framing misses the most consequential compliance trap in the entire Code TP framework: the SSTB exclusion.
RSM's analysis of the final regulations published April 13, 2026 described the SSTB exclusion as "the one most people miss." The reason is structural: every public-facing discussion of the no-tax-on-tips deduction is written for hospitality employers. No discussion has addressed the professional services firm CFO who may have set up Code TP payroll coding in January 2026 without knowing that Regulation Section 1.224-1 categorically excludes all employees of Specified Service Trades or Businesses from the qualified tips deduction, regardless of occupation, regardless of TTOC assignment, regardless of how much the employee actually receives in tips.
If your firm is an accounting firm, a law firm, a financial advisory, a consulting firm, a healthcare practice, or an actuarial firm, and your payroll team configured Code TP in January 2026 because one or more employees requested it, you have been producing incorrect W-2 Box 12 data for seven-plus months. That data will generate IRS correspondence audits for the affected employees and will require W-2c corrections from the employer.
This post addresses specifically and exclusively the SSTB exclusion: what it is, which employers it covers, why it operates at the employer level rather than the occupation level, how it affects firms with mixed SSTB and non-SSTB operations, and what professional services CFOs must do before year-end W-2 production.
What Is the SSTB Exclusion and Where Does It Appear in the Final Regulations?
The SSTB exclusion for the qualified tips deduction appears in Regulation Section 1.224-1 of the final regulations under REG-110032-25, published April 13, 2026 and effective June 12, 2026.
The regulation provides that a "qualified tip" for purposes of IRC Section 224 does not include any tip received by an employee in connection with the trade or business of the employer if that trade or business is a specified service trade or business as defined in Section 199A(d).
The structure of the exclusion is critical to understanding its effect. The exclusion is not a limitation on the type of tips that qualify. It is a categorical disqualification of any tips received in connection with an SSTB employer's business. If the employer is an SSTB, no tips received by any of its employees qualify for the Section 224 deduction, regardless of the employee's occupation, regardless of whether the employee's occupation appears on the Treasury Tipped Occupation Code list, and regardless of the amount of tips received.
The TaxSharkinc analysis of the no-tax-on-tips framework confirms the breadth: the SSTB exclusion operates as an employer-level disqualification. The individual employee's occupation, tip amount, and TTOC assignment are irrelevant if the employer fails the SSTB test. The deduction is simply unavailable for all tips received in connection with an SSTB's business.
This means the compliance obligation for professional services firms is not to assess which of their employees have qualifying occupations. It is to confirm that they are an SSTB, and if they are, to confirm that no Code TP has been reported for any employee.
What Is a Specified Service Trade or Business Under Section 199A?
Section 199A(d)(1)(A) defines a Specified Service Trade or Business as any trade or business involving the performance of services in the fields of: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, brokerage services, or investing, investment management, trading, or dealing in securities, partnership interests, or commodities.
Section 199A(d)(1)(B) adds a catch-all for any trade or business where the principal asset of such trade or business is the reputation or skill of one or more of its employees or owners.
The SSTB definition was originally developed for purposes of the Section 199A qualified business income (QBI) deduction, under which SSTB income is excluded from the deduction above certain income thresholds. The Section 224 qualified tips regulation imports the same SSTB definition by reference, which means the substantial body of guidance developed under Section 199A for identifying SSTBs applies directly to the Code TP exclusion.
Under the Section 199A regulations and the IRS's published FAQs on Section 199A, the specific definitions of the SSTB service fields are:
Health: the provision of medical services by individuals such as physicians, pharmacists, nurses, dentists, veterinarians, and physical and occupational therapists. Does not include health clubs or spas.
Law: the provision of legal services by attorneys and similar professionals. Does not include delivery services or courier services that happen to serve legal customers.
Accounting: the provision of accounting, bookkeeping, tax preparation, and similar professional services. Does not include financial statement software companies.
Actuarial science: the provision of actuarial services.
Performing arts: the provision of services in connection with the creation of performing arts, such as musicians, actors, and directors. Does not include broadcasting companies.
Consulting: the provision of professional advice and counsel, including lobbying services. Does not include salespeople who receive commissions.
Athletics: the provision of services related to athletic performance, such as professional athletes, coaches, and team managers.
Financial services: the provision of financial services including managing wealth, advising on investments, and tax planning. Does not include banking.
Brokerage services: includes stockbrokers and similar professionals.
Investing, investment management, trading, dealing: includes any trade or business that involves investing, managing investment accounts, trading for one's own account, or dealing in securities, partnership interests, or commodities.
Which Professional Services Employers Are SSTBs: The Full List
For the purposes of the Code TP SSTB exclusion, the following employer types are SSTBs and their employees are categorically ineligible for the qualified tips deduction:
Accounting firms: CPA firms, bookkeeping firms, tax preparation firms, and accounting advisory firms. Regardless of size, structure, or whether the firm also provides non-accounting ancillary services, the primary business of performing accounting services makes it an SSTB.
Law firms: solo practitioners, partnerships, LLCs, and professional corporations providing legal services. Includes firms that primarily practice tax law, corporate law, litigation, or any other legal specialty.
Financial advisory and investment management firms: registered investment advisers, wealth management firms, private equity fund managers, hedge fund managers, and other investment management businesses.
Actuarial firms: firms providing actuarial consulting, pension actuarial services, and insurance actuarial services.
Consulting firms: management consulting firms, strategy consulting firms, IT consulting firms that provide advisory services (as opposed to IT services firms that primarily sell products or deliver implementation work), and lobbying firms.
Healthcare practices: physician practices, dental practices, veterinary practices, physical therapy practices, occupational therapy practices, and similar provider organisations. Includes both individual practitioners and group practices.
Athletic organisations: professional sports teams and their management organisations, individual athlete management firms, and professional coaching organisations.
Performing arts organisations: talent agencies, artist management firms, and other entities whose principal asset is the reputation or skill of performing artists.
The firm-level determination is made based on the primary trade or business of the legal entity. A holding company that owns both an accounting firm subsidiary and a software company subsidiary is not itself an SSTB, but the accounting firm subsidiary is. The SSTB determination is made at the entity level at which the employees work.
Why a Receptionist or Administrative Staff at an Accounting Firm Cannot Claim Code TP
The most counterintuitive aspect of the SSTB exclusion is that it applies to all employees of an SSTB, not just the service professionals. A receptionist, administrative assistant, facilities manager, or cafeteria worker employed by an accounting firm is as disqualified from the Code TP deduction as the CPAs themselves.
The statutory logic: Section 224 restricts the deduction to tips received in connection with a qualifying trade or business. For an employee of an SSTB, all services rendered are rendered in connection with the SSTB's trade or business. The receptionist's tips, received for providing exceptional client-greeting services at the accounting firm, are received in connection with the firm's accounting business. Because that business is an SSTB, those tips do not qualify.
The RSM analysis specifically identified this scenario as the most commonly missed application of the SSTB exclusion. When employers in professional services configured their payroll systems in January 2026, the employee requesting Code TP setup may have been a receptionist, an office manager, or a building services worker whose occupation does appear on the TTOC list. The payroll administrator, following the occupation-based guidance for Code TP, set up the code without knowing the SSTB exclusion exists.
The TTOC check is the second step in Code TP eligibility, not the first. The first step is the SSTB check. If the employer is an SSTB, the analysis stops there. The TTOC list is irrelevant.
This means professional services firms must audit two questions in sequence:
Question 1: is this legal entity a Specified Service Trade or Business under Section 199A? If yes: no employee of this entity is eligible for Code TP. Remove Code TP from all employees. Assess W-2c obligation for any Code TP already coded year to date.
Question 2 (only if question 1 is no): does this employee's occupation appear on the TTOC list?
What If Your Firm Has Both SSTB and Non-SSTB Operations, Which Employees Qualify?
Many large organisations operate both SSTB and non-SSTB business lines. A diversified financial services conglomerate may include an investment management subsidiary (SSTB) and a commercial banking subsidiary (not an SSTB under Section 199A because banking is not in the SSTB field list). A consulting firm may have a software products division that is not primarily consulting but rather software licensing.
The SSTB determination is made at the entity level, not the consolidated group level. The SSTB exclusion from Code TP applies to the employees of each specific legal entity that is itself an SSTB, not to all employees of a corporate group that contains an SSTB subsidiary.
The practical implication for holding company structures:
Employees of the SSTB subsidiary: Code TP unavailable regardless of occupation.
Employees of the non-SSTB subsidiary: Code TP available if the employee's occupation is on the TTOC list and all other qualifying conditions are met.
Employees of the holding company itself: the holding company's SSTB status depends on the principal trade or business of the holding company. A holding company that itself performs no services is typically not an SSTB. A holding company that provides management services to its subsidiaries may be an SSTB if those management services constitute consulting.
The specific Section 199A taint rule is relevant here. Under Treasury Regulation Section 1.199A-5(c)(2), if a trade or business has SSTB and non-SSTB activities, and the SSTB activities represent 10% or more of the gross income of the trade or business, the entire trade or business is treated as an SSTB. For Code TP purposes, this means a subsidiary with both consulting and software licensing revenue, where consulting exceeds 10% of total revenue, is an SSTB for all its employees.
Multi-entity employers should perform the SSTB determination at the subsidiary entity level for each entity that employs tipped workers. The determination should be documented, with the applicable Section 199A analysis, before year-end W-2 production.
What Is the IRS Cross-Reference Audit Risk If Your SSTB Employees Filed Code TP?
When an employee files a tax return claiming the Section 224 qualified tips deduction, the IRS matches the claimed deduction against the employer's W-2 data. Specifically, the IRS will verify that: the employee's W-2 includes a Box 12 Code TP amount, the W-2 includes a Box 14b TTOC code, and the claimed deduction does not exceed the Code TP amount on the W-2.
The IRS also has access to information about the employer's industry classification (NAICS code) from the employer's tax filings (Form 941, Form 1120, Form 1065) and from the employer's own W-2 data submitted to the Social Security Administration. An employer in NAICS codes associated with accounting, law, financial services, or consulting that is also reporting Code TP on employee W-2s is producing a combination that the IRS may flag in its automated matching programmes.
A correspondence audit triggered by a mismatched Code TP claim falls on the employee, who receives an IRS notice asking them to document the eligibility of their tips deduction. The employee cannot document SSTB non-exclusion because the employer is an SSTB. The deduction is disallowed. The employee owes back taxes, interest, and potentially penalties.
The employee then has recourse against the employer for issuing a W-2 that implied a deduction the employer knew or should have known was unavailable. The employer's obligation is to issue a corrected W-2c. But by the time the correspondence audit occurs (typically 12 to 18 months after the return is filed), the harm to the employee has already materialised.
The employer also faces potential penalty exposure under IRC Section 6721 for filing incorrect information returns (the W-2s with Code TP for SSTB employees). The penalty structure is the same as for other W-2 errors: $50 to $630 per form depending on timing of correction.
What Must Your Payroll Team Correct Before Year-End W-2 Production?
If your firm is an SSTB and Code TP has been coding in your payroll system since January 2026, the correction has two components: stopping the prospective error and addressing the year-to-date accumulated error.
Stopping the prospective error: update the payroll system configuration immediately to remove Code TP from all employees of SSTB entities. This correction should be implemented before the next pay cycle. From the correction date forward, no Code TP amount will accumulate for affected employees.
Addressing the year-to-date accumulated error: for each employee who has year-to-date Code TP amounts coded since January 2026, the employer must determine whether to issue a corrected W-2c.
The W-2c timing consideration: the most efficient correction is to identify the error before the year-end W-2 run (January 2027) and correct the year-to-date Code TP amounts in the payroll system before W-2 production. A corrected year-to-date amount reflected in the original W-2 (not a subsequent W-2c) eliminates the need for a separate W-2c filing, because the error is caught before the original W-2 is issued.
If the January 2027 W-2 run occurs before the error is identified, a W-2c must be issued for each affected employee showing a Code TP amount of zero (or the corrected amount) and removing the TTOC from Box 14b.
The employee notification obligation: when a W-2c removes a Code TP amount that the employee expected to use for their Section 224 deduction, the employee must be notified that the correction has been made and why. This notification is both a legal obligation (the employer must provide the employee with a copy of the W-2c) and an HR obligation (the employee may have filed or be planning to file a return expecting the deduction).
What Should Professional Services CFOs Do This Week?
Four specific actions for the week of August 15.
First, confirm whether each legal entity that employs tipped workers is an SSTB under Section 199A. This determination should be made by the firm's tax counsel or an outside advisor familiar with Section 199A. It is not a determination the payroll team can make independently without guidance. Document the SSTB determination for each entity with the applicable Section 199A analysis.
Second, if any entity is an SSTB, pull the year-to-date payroll report for all employees with Code TP in Box 12 or TTOC in Box 14b. Identify each affected employee and the year-to-date Code TP amount. This is the scope of the correction.
Third, update the payroll system configuration to remove Code TP coding for all employees of SSTB entities, effective for the next pay cycle. The configuration change must be documented and tested before the next payroll run.
Fourth, assess the employee communication and W-2c obligation. For each affected employee, determine whether the Code TP error will be corrected in the original year-end W-2 (if the correction is made before year-end W-2 production) or whether a W-2c will be required after the fact. Brief HR on the affected employees so the communication can be prepared before the W-2 is issued.
The timing urgency: each additional pay period without a system correction adds to the year-to-date Code TP balance that must be corrected. A correction made in August 2026 limits the correction scope to eight months of accumulated Code TP. A correction made in December 2026 results in a full year of accumulated Code TP that must be corrected in the original W-2 run or through W-2cs.
Frequently Asked Questions
What is the SSTB exclusion for the qualified tips deduction?
The SSTB exclusion is a categorical disqualification under Regulation Section 1.224-1 of the final regulations (REG-110032-25, April 13, 2026). If an employer is a Specified Service Trade or Business as defined in IRC Section 199A(d), none of its employees' tips qualify for the Section 224 no-tax-on-tips deduction, regardless of the employee's occupation, regardless of TTOC assignment, and regardless of the amount of tips received.
Do employees of accounting firms qualify for the no-tax-on-tips deduction?
No. Accounting is explicitly listed in Section 199A(d)(1)(A) as a specified service field. Every accounting firm, CPA firm, bookkeeping firm, and tax preparation firm is an SSTB. No employee of an accounting firm qualifies for the Section 224 qualified tips deduction under the SSTB exclusion, including administrative staff, receptionists, or support personnel whose occupations would otherwise appear on the TTOC list.
What businesses are SSTBs under Section 199A?
Section 199A(d)(1)(A) lists: health, law, accounting, actuarial science, performing arts, consulting, athletics, financial services, and brokerage services, plus investing, investment management, trading, and dealing in securities, partnership interests, or commodities. Section 199A(d)(1)(B) adds a catch-all for businesses whose principal asset is the reputation or skill of employees or owners.
What happens if an SSTB employer incorrectly reports Code TP on employee W-2s?
The affected employees may claim a Section 224 deduction they are not entitled to, based on the Code TP amounts on their W-2. The IRS may flag this in its matching programmes given the employer's SSTB industry classification. Correspondence audits disallow the deduction and require the employee to pay back taxes, interest, and potentially penalties. The employer must issue corrected W-2cs and faces IRC Section 6721 penalties for incorrect information returns.
Can a firm with both SSTB and non-SSTB operations report Code TP for some employees?
Yes, but the determination must be made at the entity level, not the group level. Employees of a non-SSTB subsidiary of a larger group may be eligible for Code TP even if other subsidiaries in the same group are SSTBs. The 10% taint rule under Treasury Regulation Section 1.199A-5(c)(2) applies: if SSTB activities represent 10% or more of a specific entity's gross income, the entire entity is treated as an SSTB. The SSTB determination must be documented for each entity separately.
Key Takeaways
- The no-tax-on-tips deduction under IRC Section 224 has a categorical employer-level disqualification: if the employer is a Specified Service Trade or Business under Section 199A, none of its employees' tips qualify, regardless of occupation, TTOC code, or tip amount.
- SSTBs include accounting firms, law firms, financial services and investment management firms, actuarial firms, consulting firms, healthcare practices, athletic organisations, performing arts firms, brokerage firms, and investing and trading businesses. The employer-level determination is made based on the primary trade or business of the specific legal entity employing the tipped workers.
- The SSTB exclusion applies to all employees of the SSTB, including administrative staff, receptionists, and support personnel whose occupations would otherwise appear on the TTOC list. A receptionist at an accounting firm who receives tips from clients cannot claim Code TP even if their occupation is TTOC-listed.
- RSM specifically identified the SSTB exclusion as "the one most people miss" in its analysis of the April 13, 2026 final regulations. Many professional services firms configured Code TP in January 2026 without applying the SSTB test, resulting in seven-plus months of incorrect W-2 Box 12 data.
- The IRS cross-reference audit risk is real: an employer with an accounting, law, or financial services NAICS code that reports Code TP on employee W-2s produces a combination the IRS may flag in automated matching. Correspondence audits disallow the deduction and require employees to pay back taxes.
- For multi-entity employers, the SSTB determination is made at the subsidiary entity level. The 10% taint rule means a subsidiary with more than 10% SSTB revenue is fully disqualified even if most of its revenue is non-SSTB.
- Professional services CFOs must act this week: confirm SSTB status for each entity with tipped workers, pull year-to-date Code TP amounts for affected employees, remove Code TP from the payroll system configuration effective immediately, and assess the W-2c or year-end W-2 correction obligation.
