How Does ISIC Treat Subsistence and Market Production in Rev. 5?

In ISIC Rev. 5, published by the UN Statistics Division, the classification describes the activity, such as growing maize or raising goats, regardless of whether the output is sold, bartered, or consumed by the household that produced it. Market and subsistence production can therefore share an activity heading, even though national accounts and surveys may treat their measurement differently.

Does selling change what the work is?

No, not for the purpose of naming the activity. Growing maize is growing maize whether the cobs end up on a market stall, are bartered with a neighbour, or are cooked at home by the family that grew them. Raising goats is raising goats whether the animals are sold, exchanged, or kept for household milk and meat. The activity is defined by the production process: preparing ground, sowing, tending, harvesting, or breeding, feeding, and keeping animals. Where the output goes afterwards is a separate question, and the classification deliberately leaves it aside when naming the heading.

That separation can feel counterintuitive. Everyday language calls one person a “commercial farmer” and another a “subsistence farmer” as if they did different things. In statistical language they may do the same thing, at different scales and with different market links. The labels describe the household’s relationship to the market. The heading describes the work.

A household plot and a market garden, side by side

Imagine two vegetable plots growing the same crop. On one, a family grows vegetables mainly for its own table, eating most of what it harvests and sharing or bartering a surplus with neighbours. On the other, a market gardener grows the same vegetables for sale, loading crates for a town market each week. Their days look remarkably alike: digging, sowing, watering, weeding, picking. Their tools may differ in size, and their plots in area, but the sequence of tasks matches.

That match is the point. A reader who starts from the market relationship would place these two growers in different worlds. A reader who starts from the work places them together, and then records the market difference elsewhere, in survey questions about sales, consumption, and income. Both pieces of information survive that way. Starting from the market would lose the first piece.

Why do surveys still ask about subsistence separately?

If the heading is shared, why do survey forms keep asking whether output was sold or consumed at home? Because measurement needs the distinction even when classification does not. National accounts must value production, including production that never reaches a market, and they need to know how much food a household consumed from its own plot in order to do so. Surveys therefore record subsistence production separately for measurement, while still using the same activity headings to describe it.

Think of it as two layers. The activity layer answers: what was done? The measurement layer answers: where did the output go, and what was it worth? The first layer is shared between the household grower and the market gardener. The second layer differs, and it is allowed to differ, because it serves a different statistical purpose. Confusing the layers leads to errors in both directions: either subsistence growers vanish from production totals, or market and household production get mixed up in ways that distort income figures.

What does this not decide?

A shared heading settles nothing about tax, welfare, or land rights for any household. Those questions turn on national law and administrative records, not on an ISIC heading alone. A household that grows its own food may or may not qualify for a particular benefit, and the answer will come from the rules of that benefit, not from the fact that its activity is described as vegetable growing. Similarly, a heading does not prove ownership of the land worked, or a right to use it. It describes work, and work alone.

How did Rev. 5 handle this continuity?

Rev. 5 did not invent this approach from nothing. It builds on Rev. 4, within a structure of 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, merged, or reworded to reflect new ways of working, and that history matters for anyone comparing statistics across years: a series that changes revision may shift heading even when the work on the ground stayed the same. Checking correspondence material before treating an old series and a new series as continuous avoids mistaking a classification change for a real change in farming.

The practical lesson for this topic is small and steady. Describe the production process first, in plain words: what was grown or raised, and how. Note the market relationship separately, for measurement. Then compare the process description with the UNSD wording, and confirm any formal entry nationally.

This guide is statistical description only. It does not fix any reader’s code, decide a principal activity, or settle a registration, and a household or business that needs a formal answer should take its own facts to the national statistical institute or business register that holds the record.