| 63290 | Ice cream parlours, services of | |
| 54129 | Ice rinks, general construction of | |
| 73240 | Ice skates, rental or leasing of | |
| 87290 | Identity cards, plastic coating of, while you wait | |
| 85250 | Illegal entry, guarding of commercial property against | |
| 85250 | Illegal entry, guarding of industrial property against | |
| 85250 | Illegal entry, guarding of private property against | |
| 54619 | Illumination systems, installation of | |
| 93329 | Immigrants, social assistance rendered to | |
| 83562 | Impact resistance testing and analysis of concrete | |
| 83562 | Impact resistance testing and analysis of glass | |
| 83562 | Impact resistance testing and analysis of metals | |
| 83562 | Impact resistance testing and analysis of other materials | |
| 83562 | Impact resistance testing and analysis of plastics | |
| 83562 | Impact resistance testing and analysis of textiles | |
| 83562 | Impact resistance testing and analysis of wood | |
| 73121 | Implements, agricultural, rental or leasing of, without operator | |
| 86330 | Impregnation of wood with preservatives or other materials | |
| 85400 | Imprinting of packages | |
| 83160 | Improvement of computer programs | |
| 91280 | Incarceration, administrative services related to the operation of places of | |
| 91280 | Incarceration, operation of places of | |
| 94222 | Incineration, disposal of hazardous liquid waste by means of | |
| 94222 | Incineration, disposal of hazardous solid waste by means of | |
| 94212 | Incineration, disposal of non-hazardous waste by means of | |
| 91340 | Income assistance programs for families with dependent children, administrative services related to | |
| 91340 | Income assistance programs for families with dependent children, support services related to the operation of | |
| 91340 | Income assistance programs for households, administrative services related to | |
| 91340 | Income assistance programs for households, support services related to the operation of | |
| 91138 | Income controls, administrative services related to | |
| 82213 | Income statements, compilation of | |
| 65140 | Incomplete vessels, towing of, on coastal waters | |
| 65240 | Incomplete vessels, towing of, on inland waters | |
| 65140 | Incomplete vessels, towing of, on transoceanic waters | |
| 84420 | Independent journalists, services rendered to audio-visual media by | |
| 84410 | Independent journalists, services rendered to printed media by | |
| 84420 | Independent press cameramen, services rendered to audio-visual media by | |
| 84410 | Independent press photographers, services rendered to printed media by | |
| 71311 | Individual pension plans, underwriting of | |
| 71311 | Individual pensions, underwriting of | |