Once you’ve settled on the right ownership structure for your business, whether a standard Thai-partnered company, BOI promotion, or a licensed structure, actually registering the company involves a fairly defined sequence of steps. This guide walks through that process itself.

Before you file: name and shareholders

You’ll need to reserve your company name with the Department of Business Development, checking it isn’t already in use or too similar to an existing registered name. You’ll also need your shareholders finalised, a minimum of three, since Thai law requires this for a private limited company, along with clarity on how shares will be split in line with whichever ownership structure you’ve chosen.

The Memorandum of Association

This founding document sets out your registered capital, shareholder details, company address, and the scope of business activities you intend to operate. It needs to be accurate and complete, since it forms the legal basis the rest of your registration builds on, and changes later generally require formal amendment rather than a quick edit.

Filing through the digital platform

As of 2026, all private limited company registrations go through Thailand’s digital DBD Biz Regist platform, which does allow remote submission, useful if you’re finalising registration before relocating. That said, the underlying decisions, registered capital amount, shareholder structure, business activity description, benefit from proper review before filing rather than after, since corrections post-registration are more involved than getting it right the first time.

Getting your Tax ID and VAT registration

Once your company is registered, you’ll need a Tax ID from the Revenue Department to operate legally. VAT registration becomes mandatory once your annual revenue crosses 1.8 million THB, though some businesses register voluntarily earlier depending on their client base, since VAT-registered status is sometimes expected by corporate clients regardless of your actual revenue level.

Appointing an auditor

Every registered Thai company, regardless of size, is legally required to have its accounts audited annually by a licensed Thai auditor. This isn’t optional for small businesses the way it might be in some other countries, and it’s worth building the ongoing cost and administrative rhythm of annual audits into your planning from day one rather than treating it as an afterthought.

Corporate tax basics

Thailand’s standard corporate income tax rate is 20 percent on net profit, with a reduced 15 percent rate available for qualifying small and medium businesses that meet specific capital and revenue thresholds. If you’ve pursued BOI promotion, tax exemptions specific to your promoted activity may apply instead, sometimes for several years, which is one of the reasons that route is attractive for eligible sectors.

Sector-specific licences

Depending on your business activity, standard company registration may not be enough on its own. Food businesses, hospitality, clinics, financial services, and construction, among others, require additional sector-specific licences beyond DBD registration, and some of these carry their own lengthy approval timelines. It’s worth identifying whether your business falls into one of these categories early, since it can materially affect your launch timeline.

Getting the structure decision right first

This guide has focused on the mechanics of registration itself. The bigger decision, whether you need a standard 49 percent foreign-owned structure, BOI promotion, or a Foreign Business Licence, shapes several of these steps and is worth settling before you begin formal filing, covered in more detail in JLIT’s guide to starting a business in Thailand as a foreigner.

Final thoughts

Company registration in Thailand is a defined, learnable process, but the ongoing obligations, audits, tax filings, VAT compliance, are real and start immediately once you’re registered. Getting professional accounting and legal support in place from the outset tends to prevent far more costly problems than it costs to arrange.

For guidance on registering and structuring your Thai company, get in touch, or explore JLIT’s directory of local professional services.