SIC 3841 — SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
Industrial Applications and Services
See the full crosswalk with NAICS matches, SBA size standards, and conversion guidance.
Industrial Applications and Services
See the full crosswalk with NAICS matches, SBA size standards, and conversion guidance.
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Remote sellers with economic nexus must register in states where sales exceed the threshold (typically $100K or 200 transactions).
| Form Name | Who Files It | Frequency |
|---|---|---|
| Profit or Loss from Business | ||
| U.S. Return of Partnership Income | ||
| U.S. Corporation Income Tax Return | ||
| U.S. Income Tax Return for an S Corporation | ||
| Self-Employment Tax | ||
| Estimated Tax for Individuals | ||
| Application for Employer Identification Number (EIN) | ||
| Entity Classification Election | ||
| Nonemployee Compensation | ||
| Employer's Annual Federal Unemployment (FUTA) Tax Return | ||
| Employer's Quarterly Federal Tax Return | ||
| Request for Taxpayer Identification Number and Certification |
No federal sales tax in the United States. Sales tax is imposed at state and local levels, ranging from 0% to 10.25%. Economic nexus thresholds (following South Dakota v. Wayfair) require out-of-state sellers to collect sales tax once they exceed a state's revenue or transaction threshold, typically $100,000 in sales or 200 transactions per year.
No state income tax: Alaska (AK), Florida (FL), Nevada (NV), New Hampshire (NH), South Dakota (SD), Tennessee (TN), Texas (TX), Washington (WA), Wyoming (WY)
Sells physical or digital products through Shopify, Amazon FBA, Etsy, or a proprietary online store.
Runs a full-service agency offering PPC, SEO, content, email, and social media marketing to clients.
Designs and builds custom websites for small businesses, startups, and agencies using modern frameworks.
Builds iOS and Android applications as an independent contractor or through their own app studio.
Occupations and roles commonly associated with this classification
Source: O*NET / BLS occupation data · O*NET 30.2 / BLS SOC
| Feature | Description |
|---|---|
| Official name | Standard Industrial Classification (SIC) 1987 |
| Maintained by | Referenced by the U.S. Securities and Exchange Commission for filing classification |
| Purpose | Legacy industry taxonomy used before NAICS became the current standard |
| Primary use | SEC/EDGAR filings, older business records, historical market databases |
| SEC office | Industrial Applications and Services |