Southeast Asia is not one market.

Most regional strategy decks contain the same slide. A map of Southeast Asia with every country shaded in one colour, and a combined population and combined GDP set in large type underneath. The numbers are accurate. The slide is also one of the more reliable reasons regional strategies fail.

No customer buys from ASEAN. They buy from a company in Kuala Lumpur, Jakarta or Bangkok, under that country's laws, through that country's procurement rules, in a language of business that changes from one capital to the next. The regional total is a sum of markets that do not behave alike, and adding them together hides exactly the things that decide whether an entry works.

This article sets out where the region is genuinely integrated, where it is not, why Malaysia in particular suffers when it is run as an afterthought, and what we would do instead.

Integration is real in some places

ASEAN integration is not a fiction. Under the ASEAN Trade in Goods Agreement, tariffs on most goods traded between member states have been removed or brought close to zero. For a manufacturer moving components across borders, that matters, and it is the part of the story the regional slide gets right.

Beyond tariffs it thins out quickly. Government procurement remains national, and so do the rules on who may bid. Licensing is national, and in many sectors so are standards, certification and the regulator who signs off. Mutual recognition arrangements exist for some professions and product categories, but an approval in one member state rarely carries over to the next in any useful way. A company that is fully compliant in Singapore starts again in Malaysia.

The practical reading is simple. Goods move across the region more easily than they once did. Contracts, licences and relationships do not.

Each market sets its own terms

The differences are not cosmetic. Singapore is open to foreign ownership in most sectors, does its business in English and is a party to the WTO Agreement on Government Procurement. Malaysia is not a party to that agreement. Its federal procurement policy gives preference to Bumiputera companies in many categories, and a supplier generally needs to be registered with the Ministry of Finance before it can take part at all. Two neighbours joined by a causeway give different answers to the most basic commercial question, which is who may sell to the state.

Further out the contrasts sharpen. Indonesia governs foreign investment through a positive investment list and requires contracts with Indonesian parties to be in Bahasa Indonesia. Thailand's Foreign Business Act restricts foreign ownership across a long list of activities unless relief is obtained, often through the Board of Investment. The Philippines writes some of its foreign ownership limits into its constitution. In Vietnam, state-owned enterprises still hold a central place in the economy, and investment licensing follows its own sequence.

Malaysia has features of its own. Government-linked companies, and the investment institutions that own them such as Khazanah Nasional, PNB and the Employees Provident Fund, sit across banking, energy, telecommunications, plantations and infrastructure. They are customers, competitors and partners, often at once. Foreign equity rules vary by sector. Most manufacturing is open, while distributive trade, some services and several regulated activities carry conditions. Sabah and Sarawak run their own immigration controls and have their own state priorities. None of this appears on a regional slide.

Decisions are made differently too

Even where the rules look similar on paper, the way decisions are reached does not. In Malaysia, a decision of any size inside a ministry, an agency or a government-linked company tends to build through consultation before it is formalised. Relationships form over time and in person, and continuity of contact counts. Senior counterparts expect to deal with someone who has the authority to commit and who will still be in the role next year.

English is widely used in Malaysian business, which leads some firms to treat the country as a lower-cost Singapore. It is not. Bahasa Malaysia is the national language and the working language of much of government. Federal and state authorities each have a hand in many approvals. The pace of a decision reflects the people and institutions behind it, not the urgency of the supplier.

The same holds elsewhere in the region, in different ways. What works in a Jakarta boardroom is not what works in a Bangkok one, and neither is a reliable guide to Putrajaya.

A regional strategy is an average. No customer lives in the average.

The cost of running Malaysia from Singapore

The structure we see most often is a regional office in Singapore with Malaysia listed as one of its territories. A regional manager visits Kuala Lumpur for two days every few weeks, takes meetings, flies back and reports progress. On paper the company is present in Malaysia. In practice it is not.

Malaysian counterparts read this accurately. A supplier that keeps no senior people in the country is signalling that the market is secondary, and buyers, particularly in government and government-linked companies, respond in kind. Meetings happen. Follow-up stalls. The person who actually shaped the requirement was never met because the visit schedule did not allow it, and the tender that suited the product was published, closed and awarded between trips.

There is a structural cost as well. Many contracts, licences and procurement registrations require a Malaysian entity, a local address and, in some cases, local equity or a local partner. A Singapore office cannot hold those on Malaysia's behalf. Firms that discover this late end up incorporating with the Companies Commission of Malaysia, opening accounts and applying for licences under time pressure, usually after the opportunity that prompted it has gone.

None of this is an argument against Singapore. It is an argument against treating Malaysia as a territory to be covered rather than a market to be entered.

Choose one market and enter it properly

The alternative looks less ambitious on the slide and works better in practice. Pick the one market where the case is strongest, enter it properly and expand from what it teaches you.

Choosing well means putting the same specific questions to each candidate. For each one, we would want answers to the following.

• Whether the regulator will license you, on what conditions and over what period.
• Whether the buyers you need can be reached directly by a foreign company, or only through a local partner or a preferred supplier.
• Whether your pricing survives comparison with local incumbents, which is the comparison buyers will actually make.
• Whether you can put a capable person in the country with real authority, and keep them there.

A market that scores well on population and growth but poorly on these is not the right first market. Entering properly then means doing the slow work in the right order. A local entity, the licences the sector requires, banking, a senior person on the ground and a written view of the institutions and decision-makers that matter. Then patience while relationships form.

Expanding from evidence means the second market is chosen because of what the first one proved. Which parts of the offer travelled, which had to be rebuilt, what the partner model really cost. That evidence is worth more than any regional total, because it is yours and it is specific.

Some of the advice sold in this region is sold as access. A name, an introduction, a door that will open for a fee. We think that is the wrong thing to buy. What lasts is an understanding of how one market actually works, written down, so that the decisions taken in year one still make sense in year three.

Southeast Asia rewards companies that take each market on its own terms. The region is the sum of those markets, never a substitute for them.