Ordinary Partnerships in Thailand: Registered vs. Unregistered

What an ordinary partnership is

An ordinary partnership comes into existence the moment two or more persons agree to run a business together for profit. No written contract or registration is needed — which is why many family businesses are ordinary partnerships without realising it.

The defining feature is liability: all partners are jointly and unlimitedly liable for every partnership debt. Creditors may pursue any one partner or all of them. A new partner is liable even for debts incurred before joining, and a departing partner remains liable for pre-exit debts for two years.

• Formed by agreement to carry on business together — no registration needed
• All partners jointly and unlimitedly liable
• New partners are liable for existing debts
• Departing partners remain liable for two years

Registered vs. unregistered: what actually differs

An ordinary partnership registered with the Department of Business Development becomes a juristic person: it can own property, open bank accounts, and sue or be sued in its own name. An unregistered partnership is only a group of persons, so transactions must be made in the partners' joint names. The difference matters greatly when dealing with banks, government agencies, or disputes.

How the tax treatment differs

A registered ordinary partnership pays corporate income tax at juristic-person rates and must file annual financial statements with the DBD. An unregistered partnership is treated as a group of persons under the Revenue Code, filing and paying at progressive individual rates, without access to certain corporate deductions.

Both must consider VAT once revenue from goods or services reaches the statutory threshold, and both must withhold tax on salaries and service fees. Choosing whether to register is therefore not just a status question — it shapes your tax position and paperwork burden for years.

Registration steps

1. 1. Reserve the name

   Check and reserve the name through the DBD system; prepare several backups.

2. 2. Draft the partnership agreement

   State the name, objectives, address, partner list, profit-sharing ratios, and managing partners.

3. 3. File the application

   Submit to the local Business Registration Office or via the DBD's electronic channel.

4. 4. Receive the certificate

   Upon registration the partnership becomes a juristic person from that date.

5. 5. Tax registration

   Obtain a taxpayer ID and consider VAT registration against the threshold.

Ordinary partnership, limited partnership, or company?

An ordinary partnership suits small businesses whose partners trust each other and accept shared risk. If some investors should not be liable beyond their contribution, a limited partnership is the better fit. For higher-risk ventures, fundraising, or credibility with counterparties, a private limited company is usually the right choice. Picking the structure early avoids the cost of converting later.

Partner liability to understand before signing

The key difference from a limited company is that partners in an ordinary partnership are jointly and unlimitedly liable for partnership debts — even debts incurred by another partner acting in the partnership's business. Creditors may pursue a partner's personal assets once partnership assets are exhausted.

This risk makes choosing partners the most important decision in an ordinary partnership. An agreement that defines signing authority, spending limits and approval steps for major transactions reduces risk but cannot remove liability toward outsiders. As the business grows, consider registering as a juristic person or converting to a limited partnership.

Registration and converting the business form

An ordinary partnership registered with the Department of Business Development becomes a juristic person separate from its partners, able to contract, hold property and sue in its own name. An unregistered partnership is merely a group of individuals, and transactions must rely on the individual partners' names.

As the business grows, many operators convert to a limited partnership or a limited company to cap liability and build credibility with trading partners and banks. Conversion requires orderly transfer of assets, liabilities and existing contracts. Our staff can plan the conversion so business operations continue uninterrupted.

Registering an Ordinary Partnership

An ordinary partnership is registered at the provincial or Bangkok commercial registration office by filing the partnership agreement with copies of every partner's identification. An unregistered partnership still binds the partners among themselves but has no juristic personality and cannot sue in its own name.

A registered ordinary partnership is a juristic person: it files corporate income tax and registers for VAT once revenue reaches the statutory threshold. The key difference from a limited partnership is that every partner bears unlimited joint liability.

Day-to-day management of the partnership

In an ordinary partnership every partner may manage the business unless the partnership agreement provides otherwise, and one partner's acts in the ordinary course of business bind the partnership and the other partners even without their knowledge. The agreement should therefore state clearly which matters a partner may decide alone and which — such as borrowing or buying high-value assets — require everyone's consent.

If the agreement is silent on profit and loss sharing, the law divides profits in proportion to capital contributions. The partnership should keep proper accounts and an annual profit-and-loss statement that every partner can inspect, because transparency over numbers is the foundation of trust and keeps both the partnership's and each partner's tax filings correct.

Common mistakes in ordinary partnerships

The most frequent mistake is having no written partnership agreement. Although the law does not require one, when disputes arise over profit shares, decision-making authority or withdrawal, partners often remember the arrangement differently. A written agreement stating capital contributions, profit sharing, signing authority and exit conditions prevents most of these disputes.

Another is mixing partnership and personal bank accounts, which makes it hard to prove the partnership's income and debts for tax or litigation purposes. The partnership should keep a separate account and proper books from day one. Finally, vet new partners carefully: an incoming partner is liable for the partnership's existing debts, and existing partners are liable for debts the newcomer incurs in the partnership's name.

Frequently asked questions