Market sizing for entry. The number a real decision needs.

The short answer. Size the market you can win, not the one that sounds good.

Market sizing for a new market entry comes down to three numbers, usually called TAM, SAM and SOM. Total addressable market is the full demand for your category if you captured every buyer that exists. Serviceable addressable market narrows that to the buyers you could actually reach given your product, language, compliance position and target geography today. Serviceable obtainable market narrows further still, to what you could plausibly win in a given period once competitors, your own sales capacity and how quickly buyers in that market actually switch suppliers are accounted for.

The mistake almost every founder makes is presenting TAM as if it's the opportunity. A headline figure like "the GCC hospitality market is worth billions" tells an investor almost nothing about what a specific business can capture in year one. The number that should drive an entry decision is SOM, and getting there honestly takes more work than pulling a total off the first market report you find.

This matters more for a market entry than for most other planning exercises, because the cost of getting it wrong compounds. Overstating SOM leads to hiring a local sales team before there's enough realistic demand to support them, or setting board expectations for a first-year revenue number the market structure simply won't allow. Understating it, less common but just as damaging, can mean walking away from a genuinely viable entry because the initial TAM-only figure looked too small to justify the investment. The exercise exists to get that decision right, not to produce an impressive slide.

Step by step. Bottom-up first, then check it against published data.

Start by defining exactly who counts as a customer: the segment, size band and geography you're targeting, specifically, not a broad category like "hotels" or "hospitality businesses". This single decision determines whether every number that follows is useful. "Independent boutique hotels with 20 to 150 rooms in the UAE and Saudi Arabia" is a workable definition. "Hospitality businesses in the Middle East" is not.

Write this definition down before doing anything else, and share it with whoever else is involved in the entry decision. It's tempting to widen the definition later once the first count looks smaller than hoped, but changing the definition midway through the exercise is how a market sizing number quietly stops meaning anything. Fix it first, then let the numbers that follow be whatever they honestly are.

Next, count the total addressable market from the ground up: multiply the actual number of businesses matching that definition by what they'd realistically pay per year for what you sell. Source the customer count from named directories, tourism authority registers or trade association data rather than a guess, and use your own current pricing, not an industry average, for the spend figure. This bottom-up total is your working TAM.

This step is where most market sizing exercises quietly go wrong, because the customer count is often built from whichever list is easiest to find rather than the one that actually matches the definition from step one. A national tourism board's hotel register, a hospitality association's member list and a commercial property database will all give different counts for what looks like the same market, sometimes by a factor of two or more, because each one defines "hotel" or "hospitality business" slightly differently. Pull from at least two independent sources and reconcile the gap before treating either number as reliable.

Then narrow to the serviceable addressable market: cut the total down to customers you can actually reach and serve given your current product, your compliance position (data residency, licensing, local entity requirements) and the languages and support hours you can realistically offer. A product that isn't yet configured for Arabic-language support or doesn't meet a market's data-residency rules isn't serviceable there yet, no matter how large the total market looks.

This narrowing step is also where segment fit gets tested honestly. A property management system built for 200-room city hotels rarely serves a 20-room boutique property well, even if both technically sit inside the same "hospitality" category in a published report. If your product has a genuine sweet spot in size, service type or ownership structure, exclude the segments outside it from SAM now rather than discovering the mismatch after the deals are already signed and the support tickets start piling up.

Finally, narrow again to the serviceable obtainable market: apply a realistic capture rate based on your actual sales capacity, how concentrated the competition already is, and how long buyers in that market typically take to switch suppliers. In hospitality, procurement cycles are often longer than software buyers assume, particularly where a general manager needs group or ownership sign-off. A capture rate of low single digits in year one is normal for a new entrant; treat anything higher as a claim to justify, not a starting assumption.

Build the capture rate from your own constraints rather than an industry rule of thumb. Two founders with an identical SAM will have a different realistic SOM if one has a single salesperson covering the whole region and the other has a local team already booking meetings. Ask three concrete questions before settling on a number: how many qualified conversations can the current team actually run in a year, what proportion of those conversations has historically closed in a comparable market, and how long does a typical deal in this sector actually take from first contact to signature. Multiply those together and you get a defensible SOM, not a percentage picked because it looked reasonable on a slide.

A worked example. Sizing a GCC hospitality tech entry.

Take a hospitality tech firm considering entry into the UAE. The published category context: Mordor Intelligence puts the overall UAE hospitality market at roughly US$30 billion in 2026, growing at a 7.87% compound annual rate, and Grand View Research forecasts the UAE hotel and hospitality management software market specifically at US$173.1 million by 2030, growing at 8.4% a year from 2025. Neither figure is the answer on its own; both are useful boundaries to check a bottom-up number against.

Cross-checking the bottom-up SAM figure against Grand View Research's US$173.1 million category forecast either confirms the count is in a plausible range or flags that the customer definition, the published source, or both need a second look before the number goes into a board deck or an investor update.

Worth noting too: the overall UAE hospitality market and the hospitality technology software market inside it are growing at different rates, 7.87% for the broader market against 8.4% for hospitality management software specifically, according to Mordor Intelligence and Grand View Research respectively. That gap suggests software spend is taking a slightly larger share of hospitality budgets each year, which is a useful data point for a business case even before the bottom-up SOM number is finished. A single growth-rate figure quoted in isolation rarely tells you this; comparing the category rate against the sub-segment rate does.

Common mistakes. Where the number gets inflated.

The first is leading with TAM in a business case and letting it stand in for the opportunity, when SOM is the only number that should drive a resourcing or investment decision. The second is using a single published report without a bottom-up check; different research firms routinely disagree on the same category by a wide margin, and an entry plan built entirely on the most flattering number is a plan built on someone else's assumptions.

The third is applying a Western benchmark capture rate or sales cycle to a GCC market without adjusting it. Vendor concentration, procurement structures and decision-maker involvement differ enough across UAE, Saudi and wider GCC hospitality buyers that a percentage-of-TAM guess imported from a US or UK playbook usually overstates what's achievable in year one. The fourth, and the one that causes the most damage later, is skipping the recount. A market sizing exercise done once at the planning stage and never revisited stops reflecting reality within a year, particularly in a market growing as fast as UAE hospitality technology currently is.

A fifth mistake shows up specifically in board and investor materials: quoting TAM, SAM and SOM without stating the assumptions behind each one. A number without its working is not a market size, it's a claim. State the customer definition, the pricing assumption and the capture-rate logic alongside the figures themselves, so anyone reviewing the case can see exactly where the number came from and challenge the part they disagree with, rather than the conclusion as a whole.