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Principal Business Activity Codes
This list of principal business activities and their
associated codes is designed to classify an enterprise
by the type of activity in which it is engaged to facilitate
the administration of the Internal Revenue Code. These
principal business activity codes are based on the North
American Industry Classification System.
Using the list of activities and codes below,
determine from which activity the company derives the
largest percentage of its “total receipts.” Total receipts is
defined as the sum of gross receipts or sales (page 1,
line 1a); all other income (page 1, lines 4 and 5); income
reported on Schedule K, lines 4, 5a, and 6; income or
net gain reported on Schedule K, lines 7, 8a, 9, and 10;
and income or net gain reported on Form 8825, lines 2,
19, and 20a. If the company purchases raw materials
and supplies them to a subcontractor to produce the
finished product, but retains title to the product, the
company is considered a manufacturer and must use
one of the manufacturing codes (311110-339900).
Once the principal business activity is determined,
enter the six-digit code from the list below on page 1,
item B. Also enter the business activity on page 2,
Schedule B, line 2(a) and a brief description of the
principal product or service of the business on line 2(b).
Agriculture, Forestry, Fishing
and Hunting
Crop Production
111100 Oilseed & Grain Farming
111210 Vegetable & Melon Farming
(including potatoes & yams)
111300 Fruit & Tree Nut Farming
111400 Greenhouse, Nursery, &
Floriculture Production
111900 Other Crop Farming (including
tobacco, cotton, sugarcane, hay,
peanut, sugar beet & all other
crop farming)
Animal Production
112111 Beef Cattle Ranching & Farming
112112 Cattle Feedlots
112120 Dairy Cattle & Milk Production
112210 Hog & Pig Farming
112300 Poultry & Egg Production
112400 Sheep & Goat Farming
112510 Aquaculture (including shellfish &
finfish farms & hatcheries)
112900 Other Animal Production
Forestry and Logging
113110 Timber Tract Operations
113210 Forest Nurseries & Gathering of
Forest Products
113310 Logging
Fishing, Hunting and Trapping
114110 Fishing
114210 Hunting & Trapping
Support Activities for Agriculture and
Forestry
115110 Support Activities for Crop
Production (including cotton
ginning, soil preparation,
planting, & cultivating)
115210 Support Activities for Animal
Production (including farriers)
115310 Support Activities For Forestry
Mining
211120 Crude Petroleum Extraction
211130 Natural Gas Extraction
212110 Coal Mining
212200 Metal Ore Mining
212310 Stone Mining & Quarrying
212320 Sand, Gravel, Clay, & Ceramic &
Refractory Minerals Mining &
Quarrying
212390 Other Nonmetallic Mineral
Mining & Quarrying
213110 Support Activities for Mining
Utilities
221100 Electric Power Generation,
Transmission & Distribution
221210 Natural Gas Distribution
221300 Water, Sewage & Other Systems
221500 Combination Gas & Electric
Construction
Construction of Buildings
236110 Residential Building Construction
236200 Nonresidential Building
Construction
Heavy and Civil Engineering
Construction
237100 Utility System Construction
237210 Land Subdivision
237310 Highway, Street, & Bridge
Construction
237990 Other Heavy & Civil Engineering
Construction
Specialty Trade Contractors
238100 Foundation, Structure, & Building
Exterior Contractors (including
framing carpentry, masonry,
glass, roofing, & siding)
238210 Electrical Contractors
238220 Plumbing, Heating, &
Air-Conditioning Contractors
238290 Other Building Equipment
Contractors
238300 Building Finishing Contractors
(including drywall, insulation,
painting, wallcovering, flooring,
tile, & finish carpentry)
238900 Other Specialty Trade
Contractors (including site
preparation)
Manufacturing
Food Manufacturing
311110 Animal Food Mfg
311200 Grain & Oilseed Milling
311300 Sugar & Confectionery Product
Mfg
311400 Fruit & Vegetable Preserving &
Specialty Food Mfg
311500 Dairy Product Mfg
311610 Animal Slaughtering &
Processing
311710 Seafood Product Preparation &
Packaging
311800 Bakeries, Tortilla, & Dry Pasta
Mfg
311900 Other Food Mfg (including
coffee, tea, flavorings &
seasonings)
Beverage and Tobacco Product
Manufacturing
312110 Soft Drink & Ice Mfg
312120 Breweries
312130 Wineries
312140 Distilleries
312200 Tobacco Manufacturing
Textile Mills and Textile Product Mills
313000 Textile Mills
314000 Textile Product Mills
Apparel Manufacturing
315100 Apparel Knitting Mills
315210 Cut & Sew Apparel Contractors
315250 Cut & Sew Apparel Mfg (except
Contractors)
315990 Apparel Accessories & Other
Apparel Mfg
Leather and Allied Product
Manufacturing
316110 Leather & Hide Tanning &
Finishing
316210 Footwear Mfg (including rubber &
plastics)
316990 Other Leather & Allied Product
Mfg
Wood Product Manufacturing
321110 Sawmills & Wood Preservation
321210 Veneer, Plywood, & Engineered
Wood Product Mfg
321900 Other Wood Product Mfg
Paper Manufacturing
322100 Pulp, Paper, & Paperboard Mills
322200 Converted Paper Product Mfg
Printing and Related Support Activities
323100 Printing & Related Support
Activities
Petroleum and Coal Products
Manufacturing
324110 Petroleum Refineries (including
integrated)
324120 Asphalt Paving, Roofing, &
Saturated Materials Mfg
324190 Other Petroleum & Coal Products
Mfg
Chemical Manufacturing
325100 Basic Chemical Mfg
325200 Resin, Synthetic Rubber, &
Artificial & Synthetic Fibers &
Filaments Mfg
325300 Pesticide, Fertilizer, & Other
Agricultural Chemical Mfg
325410 Pharmaceutical & Medicine Mfg
325500 Paint, Coating, & Adhesive Mfg
325600 Soap, Cleaning Compound, &
Toilet Preparation Mfg
325900 Other Chemical Product &
Preparation Mfg
Plastics and Rubber Products
Manufacturing
326100 Plastics Product Mfg
326200 Rubber Product Mfg
Nonmetallic Mineral Product
Manufacturing
327100 Clay Product & Refractory Mfg
327210 Glass & Glass Product Mfg
327300 Cement & Concrete Product Mfg
327400 Lime & Gypsum Product Mfg
327900 Other Nonmetallic Mineral
Product Mfg
Primary Metal Manufacturing
331110 Iron & Steel Mills & Ferroalloy
Mfg
331200 Steel Product Mfg from
Purchased Steel
331310 Alumina & Aluminum Production
& Processing
331400 Nonferrous Metal (except
Aluminum) Production &
Processing
331500 Foundries
Fabricated Metal Product
Manufacturing
332110 Forging & Stamping
332210 Cutlery & Handtool Mfg
332300 Architectural & Structural Metals
Mfg
332400 Boiler, Tank, & Shipping
Container Mfg
332510 Hardware Mfg
332610 Spring & Wire Product Mfg
332700 Machine Shops; Turned Product;
& Screw, Nut, & Bolt Mfg
332810 Coating, Engraving, Heat
Treating, & Allied Activities
332900 Other Fabricated Metal Product
Mfg
Machinery Manufacturing
333100 Agriculture, Construction, &
Mining Machinery Mfg
333200 Industrial Machinery Mfg
333310 Commercial & Service Industry
Machinery Mfg
333410 Ventilation, Heating,
Air-Conditioning, & Commercial
Refrigeration Equipment Mfg
333510 Metalworking Machinery Mfg
333610 Engine, Turbine & Power
Transmission Equipment Mfg
333900 Other General Purpose
Machinery Mfg
Computer and Electronic Product
Manufacturing
334110 Computer & Peripheral
Equipment Mfg
334200 Communications Equipment Mfg
334310 Audio & Video Equipment Mfg
334410 Semiconductor & Other
Electronic Component Mfg
334500 Navigational, Measuring,
Electromedical, & Control
Instruments Mfg
334610 Manufacturing & Reproducing
Magnetic & Optical Media
Electrical Equipment, Appliance, and
Component Manufacturing
335100 Electric Lighting Equipment Mfg
335200 Household Appliance Mfg
335310 Electrical Equipment Mfg
335900 Other Electrical Equipment &
Component Mfg
Transportation Equipment
Manufacturing
336100 Motor Vehicle Mfg
336210 Motor Vehicle Body & Trailer Mfg
336300 Motor Vehicle Parts Mfg
336410 Aerospace Product & Parts Mfg
336510 Railroad Rolling Stock Mfg
336610 Ship & Boat Building
336990 Other Transportation Equipment
Mfg
Furniture and Related Product
Manufacturing
337000 Furniture & Related Product
Manufacturing
Miscellaneous Manufacturing
339110 Medical Equipment & Supplies
Mfg
339900 Other Miscellaneous
Manufacturing
Wholesale Trade
Merchant Wholesalers, Durable Goods
423100 Motor Vehicle & Motor Vehicle
Parts & Supplies
423200 Furniture & Home Furnishings
423300 Lumber & Other Construction
Materials
423400 Professional & Commercial
Equipment & Supplies
423500 Metal & Mineral (except
Petroleum)
423600 Household Appliances &
Electrical & Electronic Goods
423700 Hardware, & Plumbing & Heating
Equipment & Supplies
423800 Machinery, Equipment, &
Supplies
423910 Sporting & Recreational Goods &
Supplies
423920 Toy & Hobby Goods & Supplies
423930 Recyclable Materials
423940 Jewelry, Watch, Precious Stone,
& Precious Metals
423990 Other Miscellaneous Durable
Goods
Merchant Wholesalers, Nondurable
Goods
424100 Paper & Paper Products
424210 Drugs & Druggists' Sundries
424300 Apparel, Piece Goods, & Notions
424400 Grocery & Related Products
424500 Farm Product Raw Materials
424600 Chemical & Allied Products
424700 Petroleum & Petroleum Products
424800 Beer, Wine, & Distilled Alcoholic
Beverages
424910 Farm Supplies
424920 Book, Periodical, & Newspapers
424930 Flower, Nursery Stock, & Florists'
Supplies
424940 Tobacco Products & Electronic
Cigarettes
424950 Paint, Varnish, & Supplies
424990 Other Miscellaneous Nondurable
Goods
Wholesale Trade Agents & Brokers
425120 Wholesale Trade Agents &
Brokers
Retail Trade
Motor Vehicle and Parts Dealers
441110 New Car Dealers
441120 Used Car Dealers
441210 Recreational Vehicle Dealers
441222 Boat Dealers
441227 Motorcycle, ATV, & All Other
Motor Vehicle Dealers
441300 Automotive Parts, Accessories, &
Tire Retailers
Building Material and Garden
Equipment and Supplies Dealers
444110 Home Centers
444120 Paint & Wallpaper Retailers
444140 Hardware Retailers
444180 Other Building Material Dealers
444200 Lawn & Garden Equipment &
Supplies Retailers
Food and Beverage Retailers
445110 Supermarkets & Other Grocery
Retailers (except Convenience)
445131 Convenience Retailers
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