Supplier Due Diligence in Thailand: 9 Steps Before Signing Your First Contract

Thailand recorded over $284 billion in export trade in 2024, according to the Ministry of Commerce. International buyers are increasingly sourcing Thai rubber, electronics, food products, and cosmetics - yet a significant share of first-time importers lose money on their very first order. The reason is almost always the same: no systematic verification of the supplier before signing a contract.

Supplier due diligence in Thailand works differently from most Western or East Asian markets. There is no centralized open-access corporate registry comparable to Companies House or the SEC EDGAR system. Thai business culture also places a high value on saving face, which can mask the real financial condition of a company. Without a clear step-by-step approach, you risk wiring a deposit to a shell company or receiving a shipment that fails certification in your target market.

Below is a practical 9-step methodology updated for 2026 and calibrated for international buyers sourcing goods from Thailand.

Quick Answer

• DBD (Department of Business Development) is the primary source of data on Thai companies. A company extract costs 200 THB and is available online at datawarehouse.dbd.go.th
• Use a minimum of 3 independent sources for cross-verification: DBD records, tax registration, and a physical factory visit
• An estimated 30-40% of Thai 'manufacturers' listed on platforms like Alibaba or Made-in-Thailand are actually trading intermediaries, not factories
• An on-site factory audit reduces the probability of defective goods by 60-70% compared to remote verification alone
• SGS, Bureau Veritas, and Intertek are the three internationally accredited inspection companies with offices in Bangkok and the Eastern Seaboard industrial zones
• A contract governed by Thai law should be bilingual (Thai and English), with the Thai version taking legal precedence in court

Scenarios and Options

Step 1 - Verify Legal Status Through the DBD

The Department of Business Development, operating under the Ministry of Commerce, maintains the official registry of all registered Thai entities. On the portal datawarehouse.dbd.go.th you can access:

• Registration date (companies under 2 years old warrant extra scrutiny)
• Registered capital
• Names of directors and shareholders
• Current status: active, dissolved, or under bankruptcy proceedings

A critical red flag: if a Thai company has minimum registered capital of just 5,000 THB yet is proposing a contract worth hundreds of thousands of dollars, treat this as a serious warning sign.

Step 2 - Tax Registration Check (Revenue Department)

Request a copy of the supplier's Por Por 20 certificate (VAT registration document). The VAT number can be verified directly on the Revenue Department website. A company operating without VAT registration while reporting annual turnover exceeding 1.8 million THB is either operating informally or significantly under-reporting revenue.

Step 3 - Review Audited Financial Statements

Thai-registered companies are legally required to file audited financial statements with the DBD annually. You can purchase these reports for 500 THB per year. Pay attention to:

• Revenue trends across the last 3 fiscal years
• Debt-to-assets ratio
• Any recorded net losses

If a company has not filed financial reports for more than one year, this is a strong signal to walk away from the relationship.

Step 4 - Physical Factory Visit

This is the single most important step, and it cannot be replaced by a video call. During your visit, document:

• Actual headcount and number of active production lines
• Original certificates (GMP, HACCP, ISO) displayed on-site, not just PDFs emailed to you
• Raw material inventory levels (an empty warehouse during 'full capacity' is a warning sign)
• Equipment markings to determine whether machinery is owned or rented

Step 5 - Verify Export Licenses

For certain product categories - food, cosmetics, pharmaceuticals, and chemicals - Thailand requires an FDA Thailand export license. License numbers can be verified at oryor.com. Without a valid license, your shipment may be detained at Thai customs before it even departs.

Step 6 - Place a Test Order

Never begin with a full-volume order. A sound test order strategy looks like this:

• First order: 10-15% of your target volume
• Payment terms: no more than 30% advance payment, with the balance paid on shipment or via Letter of Credit (L/C)
• Include a penalty clause for late delivery - the market standard is 1-2% of the contract value per week of delay

Step 7 - Pre-Shipment Inspection (PSI)

Engage SGS Thailand, Bureau Veritas, or Intertek to conduct a Pre-Shipment Inspection. Fees range from $300 to $1,500 depending on cargo volume. The inspector verifies that goods match the agreed specifications, checks packaging, labeling, and quantity. This is your primary protection against substitution and defects.

Step 8 - Structure the Contract Correctly

A contract with a Thai supplier must include:

• An arbitration clause (THAC - Thailand Arbitration Center or ICC are both recommended)
• A product specification annex with photographs and laboratory data
• Clear return and compensation terms for non-conforming goods
• Jurisdiction: Thai courts or international arbitration

Important: verbal agreements have no legal standing in Thailand for international commercial transactions.

Step 9 - Ongoing Monitoring After the First Shipment

Due diligence does not end after your first successful delivery. On a 6-to-12-month cycle:

• Refresh the DBD company extract
• Request updated financial statements
• Conduct an unannounced factory visit
• Monitor litigation records via Thailand's eCourt system (Supreme Court)

Comparison Table

Main Risks and Mistakes

1. Trusting a polished website or showroom. Thai intermediaries frequently rent showrooms and present third-party goods as their own production. Always request a dated video of the actual manufacturing process.

2. Paying 100% upfront. Even if a supplier insists, this is an unacceptable risk. A Letter of Credit (L/C) through a bank protects both parties. Bangkok Bank and Kasikornbank both have established processes for handling international L/C transactions.

3. A contract written only in English. Thai courts give legal priority to the Thai-language version of a contract. If your agreement exists only in English, the court will commission its own translation - and the result may not favor you.

4. Overlooking certification requirements for your target market. Goods that pass Thai quality control do not automatically meet the standards required in the EU, US, or other destination markets. Confirm all certification requirements before placing your order.

5. Skipping cargo insurance. Sea freight from Laem Chabang to ports in Europe or the Middle East typically takes 25-40 days. CIF insurance costs approximately 0.3-0.5% of the cargo value - a negligible premium for the protection it provides.

6. Working without a customs broker. Thai Customs uses its own HS code classifications. An incorrect tariff classification leads to fines, cargo holds, and delays. A qualified Thai customs agent pays for itself on the first shipment.

FAQ

Can I verify a Thai supplier remotely from abroad? Yes - a basic check through the DBD can be completed online. However, a physical factory visit and independent pre-shipment inspection cannot be replicated remotely and should be treated as non-negotiable for significant orders.

How much does a full supplier due diligence cost in Thailand? Using a combination of a local lawyer and an inspection company, expect to spend between 50,000 and 150,000 THB ($1,400-$4,200). A self-directed check using only official portals will cost 5,000-20,000 THB.

Which Thai industrial zones are most reliable for sourcing? The Eastern Seaboard (Rayong, Chonburi) is the hub for automotive parts and electronics. Samut Prakan specializes in textiles and plastics. Chiang Mai is known for ceramics, furniture, and artisanal food products.

How do I tell if I am dealing with a trading company rather than a factory? Request Form Ror 0.2 (industrial construction permit) and Wor 0.4 (factory operating license). A trading intermediary will not be able to produce either document.

Do Thai banks process Letters of Credit for international buyers? Yes. Bangkok Bank, Kasikornbank, and SCB all regularly process L/C transactions for international trade. Bank fees typically range from 0.5 to 1.5% of the transaction value.

Is a Thai lawyer necessary to draft a supplier contract? Absolutely. The contract must comply with the Thai Civil and Commercial Code. Legal fees for contract drafting start at 30,000 THB and can reach 100,000 THB for complex agreements.

How does arbitration work in Thailand? Thailand is a signatory to the 1958 New York Convention, meaning arbitral awards are enforceable internationally. THAC (Thailand Arbitration Center) typically resolves commercial disputes within 6-12 months.

What Thai goods are most in demand internationally in 2026? Natural rubber, processed food products (sauces, snacks, coconut milk), automotive components, natural-ingredient cosmetics, and electronic components are among the most actively imported Thai goods globally.

Is it worth buying property in Thailand if I am conducting business here regularly? Many international entrepreneurs who start with import procurement eventually purchase a Bangkok condominium or a Phuket villa as a combination of business base and investment asset, with rental yields typically in the range of 5-8% per year.

Ready to invest in Thailand? Our experts will help you find the perfect property.