The standard way to size a market is to take a population, apply a percentage who might buy, multiply by an expected spend, and arrive at a number.
In a large economy that produces a rough but usable estimate. In a small one it produces confident nonsense, for reasons worth understanding before you rely on any such figure.
| Problem 1 | small denominators make percentages unstable |
|---|---|
| Problem 2 | the market is not just residents |
| Problem 3 | a few large buyers can dominate |
| Better method | count actual buyers directly |
Why the standard method fails
Percentages are unreliable at small scale. Applying a two per cent adoption rate to a large population averages out individual variation. Applying it to a small one does not — the actual number of buyers may be a handful, and whether it is three or thirty depends on specifics no percentage captures.
The resident population is the wrong denominator anyway. In a tourism economy, the market for many products includes visitors, who may substantially outnumber residents in consumption terms during parts of the year.
Using resident population alone understates some markets badly and overstates others — it understates anything visitors buy and overstates anything only households buy.
Concentration changes everything. In a small market, a few institutional buyers — hotels, the public sector, a handful of distributors — can account for most of the demand for a product.
That means your addressable market may be a list of names rather than a statistical estimate, and whether you get two of them determines whether the business works.
The better method: count
The advantage of a small market is that you can enumerate it. This is impossible in a large economy and entirely feasible here.
- Define exactly who buys this — not a demographic, an actual category: hotels above a certain size, restaurants serving a certain cuisine, households with a particular need, visitors of a particular type
- Count them — using directories, association lists, licensing registers, or by driving around and counting
- Estimate purchase frequency and volume per buyer — by asking a sample of them directly
- Multiply, then discount for realistic share — you will not get all of them
- Identify the largest buyers by name and assess your chance with each
Step three is what makes this work and what most people skip. Ten conversations with actual buyers produce better data than any desk research, and in a small market ten conversations is an afternoon's work.
Step five is the discipline that prevents the most common failure: a plan that only works if you win the two largest accounts is a plan with a concentration risk you should name explicitly before committing capital.
Don't forget the visitor market
For many products this is the larger opportunity, and it behaves differently from the resident market:
- Higher willingness to pay — visitors are on holiday and price sensitivity is lower
- Strongly seasonal, as covered elsewhere on this site
- Reached through different channels — hotels, tour operators, port-area retail, activity providers
- Different product requirements — portable, packable, giftable, and permitted through customs at the destination
The last point is worth checking before designing a product: a food product that visitors cannot legally take home is severely limited as a souvenir, however good it is. Shelf-stable, sealed and clearly labelled products travel; fresh ones generally do not.
Also count the regional market
As covered in the article on regional institutions, the relevant market may extend beyond the island. Neighbouring islands share arrangements that reduce barriers, and a product viable across several small markets can be unviable in one.
Practical checks before assuming access:
- Whether your product faces duty or restriction in the neighbouring market
- Whether a licence obtained locally is recognised there
- What shipping between islands costs and how frequently it runs
- Whether an established distributor already covers the territory
The third item is often decisive: inter-island freight can be expensive and infrequent relative to the value of small consignments, which is a real constraint on regional expansion for low-value goods.
The question that settles most decisions
After the counting is done, one question determines whether the business is viable:
How many customers do I need to cover my fixed costs, and is that number a plausible share of the buyers who exist?
This is more useful than market share estimates because it is concrete. If covering costs requires forty regular customers and the entire market contains sixty potential buyers, you need two thirds of the market — which is a demanding position that should be recognised before, not after, committing.
Conversely, if you need eight and there are two hundred, the concern is competition rather than market size, which is a different and more solvable problem.
Frequently asked questions
Why does standard market sizing fail in a small economy?
Because percentages are unstable at small scale, the resident population is often the wrong denominator, and a few institutional buyers can account for most demand.
What is the better method?
Enumerate the market directly — define exactly who buys, count them, ask a sample about frequency and volume, then discount for realistic share and name your largest potential buyers.
Why check whether a product can be taken home?
Because a food product visitors cannot legally carry through customs at their destination is severely limited as a souvenir, however good it is.
What single question settles viability?
How many customers are needed to cover fixed costs, and whether that is a plausible share of the buyers who actually exist.
