Why Did ISIC Rev. 5 Add 18 Intermediation Classes?

In ISIC Rev. 5, published by the UN Statistics Division, 18 new intermediation classes were added because arranging activities had become large and visible in many markets, yet earlier structures often folded them into the activity they served. When arranging is hidden inside the underlying service, analysts cannot see its size, its growth, or its employment separately. Separate classes let national statistics show intermediation as its own kind of economic work.

What had changed in the economy that the old structure could no longer show?

By the time Rev. 5 was prepared, arranging had stopped being a side task inside other businesses and had become a business model in its own right. Platforms and brokers in transport, accommodation, professional services, and care matched customers with providers at a scale that earlier statistics struggled to display. When that arranging work was folded into the service it arranged, it vanished from view: analysts could see the rooms booked and the rides taken, but not the matching firms, jobs, and revenues that had made those bookings possible. The economy had grown a visible layer of go-betweens, and the classification needed a way to show that layer separately.

How did folding arranging into supplying distort the picture?

Imagine a booking platform for short stays counted inside accommodation statistics. Accommodation figures would then mix two different things: nights provided by hosts and hotels, and bookings arranged by a platform that provides no nights at all. Growth in the platform’s business would look like growth in accommodation provision, even if the number of rooms had not changed. Employment figures would blur in the same way, mixing platform staff who handle bookings with hotel staff who clean rooms and staff receptions. Separate classes keep those totals clean, so each sector’s figures describe the work actually done in that sector.

Why 18, and why does that number need careful reading?

The figure of 18 is a Rev. 5 total for new intermediation classes, stated in this guide’s title and opening. It is a count of new classes added, not a promise that every market now has its own intermediation class, and not a list of markets to tick off. Readers should check the UNSD structure for the market they care about, because some markets have a dedicated new class, others rely on existing headings, and the exact placement varies by market. Treating 18 as a directory of markets would mislead; treating it as evidence that arranging work grew large enough to need new statistical homes is the accurate reading.

That caution also applies to time comparisons. A series that moves from Rev. 4 to Rev. 5 may change heading even when the underlying work has not changed, because the new classes give arranging work a home it previously lacked. Anyone comparing statistics across the revision change should note the revision, check correspondence material, and avoid treating an old and a new series as continuous without that check. A rising or falling series across the change may reflect reclassification, real growth, or both, and only correspondence work can separate those explanations.

What does a short stay booking platform show about the change?

Consider a booking platform for short stays, the example already used for this topic. Before Rev. 5, its placement could be debated across several headings, with reasonable arguments for more than one home, and different countries might have answered differently. A dedicated intermediation class gives that arranging activity a clearer statistical home, so countries can record similar platforms in a similar place and analysts can compare platform activity across countries. The platform still provides no rooms, still employs no housekeeping staff, and still earns its income from arranging, but statistics can now show that arranging work on its own terms.

How does Rev. 5 as a whole frame these new classes?

Rev. 5 did not start from a blank page. Rev. 5 grows out of Rev. 4, and for 18 intermediation classes the UN Statistics Division publication has 22 sections from A to V, 87 divisions, 258 groups, and 463 classes, endorsed by the UN Statistical Commission in March 2023. Some headings were split, some were merged, and some were reworded to reflect new ways of working, and the 18 new intermediation classes sit inside that broader revision. Understanding them as part of a revision, rather than as an isolated invention, helps readers see why older statistics and newer statistics need careful bridging, and why noting the revision alongside any quoted code is good practice.

For a reader checking a heading, the route stays familiar: read the UNSD Rev. 5 structure for the market in question, compare full class descriptions with the work actually performed, paying attention to inclusions and exclusions, and consult national guidance for local application. For any formal use, the record holder is the final check, because a guide can explain an area but only the holder can confirm an entry.

That final check marks the edge of this guide too. It offers statistical classification for the new intermediation classes in general terms, and it does not determine any reader’s code, principal activity, or registration, leaving every formal question of that kind to the national statistical institute or business register that holds the record.