06 / 20 Principal activity and secondary activities

Principal activity and secondary activities

The method for principal activity and secondary activities as described in the introductory guidelines, without applying it to any specific business.

The four levels

1. Level 1 Section One letter
2. Level 2 Division Two digits
3. Level 3 Group Three digits
4. Level 4 Class Four digits

Guides in this cluster

• How are horizontally integrated activities treated?

  How horizontally integrated activities are treated in NACE Rev. 2.1, and why gross output or turnover is the usual substitute.

• How are vertically integrated activities treated?

  How vertically integrated activities are treated in NACE Rev. 2.1, and what happens when value added cannot be split between stages.

• How does the top down method work?

  How the top down method identifies a principal activity in stages, and the worked example in the NACE Rev. 2.1 manual.

• How is the top down method adapted for wholesale and retail trade?

  How the top down method is adapted for division 46 wholesale trade and division 47 retail trade, including specialised and non specialised trade.

• How is value added used to identify a principal activity?

  How gross value added at basic prices identifies a principal activity in NACE Rev. 2.1, and what the measure includes.

• What does a principal activity classification not decide?

  What a principal activity classification does not decide, and why the statistical entry must not be read as eligibility or status.

• What happens when no single activity reaches half of value added?

  What the introductory guidelines say when no activity reaches half of value added, and when the top down method is required.

• What is a principal activity?

  What a principal activity is in NACE Rev. 2.1, how value added identifies it, and what it does not decide.

• What is a secondary activity?

  What a secondary activity is in NACE Rev. 2.1, how it differs from a principal activity, and how it is recorded.

• What is an ancillary activity?

  What an ancillary activity is in NACE Rev. 2.1, the four conditions it must meet, and what is not ancillary.

• What is the stability rule?

  What the stability rule in the introductory guidelines does, why frequent changes are avoided, and how often a classification changes.

• What substitutes are used when value added is unknown?

  What substitute criteria the introductory guidelines allow when value added is unknown, and the cautions on each substitute.

All guides or home.