Most tuition and tutoring businesses use NAICS code 611691 (Exam Preparation and Tutoring) as their business activity code for income tax purposes. That code sits under the broader educational services category (611000) that appears on the IRS Schedule C code chart. The right entry for your return depends on what you actually teach, how you deliver it, and which tax form you file.
The Codes Tuition Businesses Actually Use
The IRS asks every business to report a six-digit code drawn from the North American Industry Classification System, a federal standard for sorting businesses by their primary economic activity.1U.S. Census Bureau. North American Industry Classification System For tuition providers, one code fits the majority of cases and a handful of others cover specific teaching formats.
611691 – Exam Preparation and Tutoring
This is the standard code for tutoring businesses. It covers standardized test preparation and academic tutoring, including SAT and ACT prep, remedial learning centers, college board preparation, and professional examination review.2U.S. Census Bureau. North American Industry Classification System – 611691 Exam Preparation and Tutoring If your revenue comes mainly from helping students improve grades or test scores, 611691 applies whether you teach in person, online, or at the student’s home.
611110 – Elementary and Secondary Schools
Use this code if your business is a full-time private school running a standard K–12 curriculum rather than a supplemental tutoring service. A learning center that helps students after school hours belongs under 611691. A private academy that is the student’s primary school belongs under 611110.
611610 – Fine Arts Schools
Businesses whose main service is instruction in music, drama, dance, or visual arts use 611610. A piano studio or painting school where structured lessons are the primary offering fits here. If a tutoring center adds a few music lessons on the side, the fine arts code only applies once creative instruction generates most of the revenue.
611620 – Sports and Recreation Instruction
Martial arts schools, swimming programs, gymnastics academies, and similar athletic training operations use 611620. Many owners of these businesses don’t initially think of themselves as educational services, but the code catches them.
611430 – Professional and Management Development Training
Short-duration courses aimed at working professionals — leadership seminars, corporate training workshops, management skills courses — go under 611430. Both in-person and online training programs qualify.
611710 – Educational Support Services
This code covers non-instructional work: educational testing services, curriculum development, college admissions counseling, and study-abroad coordination. If you support education without directly teaching students, 611710 is the fit.
611699 – All Other Miscellaneous Schools and Instruction
When your service doesn’t match any of the above, 611699 is the catch-all. It includes instruction in public speaking, speed reading, yoga, self-defense (other than martial arts), firearms training, and personal development. Only use it after ruling out the more specific codes.
Where the Code Goes on Your Return
The line for the business activity code depends on your entity type.
- Sole proprietors (Schedule C). Enter the six-digit code on Line B of Schedule C (Form 1040). The Schedule C instructions include a Principal Business or Professional Activity Codes chart that consolidates educational services under code 611000. Tax software often accepts the more specific NAICS code, such as 611691, which still falls within that broader category.3Internal Revenue Service. Instructions for Schedule C (Form 1040)
- Partnerships (Form 1065). Enter the six-digit code on page 1, Item C.4Internal Revenue Service. 2025 Instructions for Form 1065
- S corporations (Form 1120-S). Enter the code on page 1, Item B, and describe the business activity on Schedule B, lines 2(a) and 2(b).5Internal Revenue Service. 2025 Instructions for Form 1120-S
Picking One Code When You Offer Multiple Services
A tuition business that runs both academic tutoring and music lessons still enters a single code. The IRS instructions direct you to report the principal business activity, meaning the service that generates the largest share of your gross receipts. If 65 percent of revenue comes from SAT tutoring and 35 percent from piano lessons, the correct code is 611691.
Working this out is a records exercise. Break down your annual gross receipts by service type and identify the majority line. Keep that calculation on file. If the IRS asks about your code choice during an audit, a documented revenue breakdown keeps the conversation short.
When the split is close, say 52/48, the stakes drop, since either code would be defensible. Pick the one that edges ahead and note your reasoning.
Why the Right Code Matters
The IRS uses these codes to build statistical profiles of what businesses in each industry typically earn and spend. When a return deviates sharply from others in the same code, that gap can raise audit risk through the agency’s scoring system. A tutoring business coded as a general consulting firm gets measured against consulting-industry norms rather than education-industry norms, and the mismatch in expense ratios alone can draw attention.
The IRS instructions describe these codes as tools that “classify sole proprietorships by the type of activity they are engaged in to facilitate the administration of the Internal Revenue Code.”6Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040) Getting the code right means your return is compared to other tuition businesses instead of to an unrelated industry.
One boundary worth flagging: entering the wrong code does not carry its own specific penalty. The information return penalties you may have seen quoted ($60 to $340 for 2026, depending on how late a filing is) apply to forms like 1099 and W-2, not to NAICS code selection on your business return.7Internal Revenue Service. Information Return Penalties The real cost of a wrong code is indirect: your return gets benchmarked against the wrong industry, and normal expenses can look abnormal in that comparison.
A Quick Check Before You File
Before submitting your return, confirm three things. First, that the code you entered matches your principal revenue source for the year, not the service you started with or plan to grow. Second, that the code lives on the correct line for your entity type (Schedule C Line B, Form 1065 Item C, or Form 1120-S Item B). Third, that you have a revenue breakdown in your records supporting the choice. That short review takes a few minutes and closes the most common gaps auditors look for when they question a code.