Thailand Stamp Duty Requirements: Rates and Penalties Guide

Thailand's Revenue Code, through Sections 104–123, imposes stamp duty on 28 distinct categories of legal instruments. These range from everyday business receipts and hire-of-work contracts to bills of exchange, lease agreements, guarantees, and powers of attorney. Rates vary from THB 1 to THB 200 per instrument depending on the document type and transaction value, making Thailand stamp duty requirements one of the more granular compliance obligations in Southeast Asia.

The stakes for getting this wrong are concrete. An unstamped or insufficiently stamped instrument is inadmissible as evidence in Thai courts, which can undermine contract enforcement, debt recovery, and dispute resolution. Financial penalties escalate quickly: paying within 90 days of the deadline costs 2x the unpaid duty, while paying after 90 days jumps to 5x. Factor in the original duty itself, and total exposure reaches 6x the amount that should have been paid from the start.

Thailand's stamp duty schedule extends well beyond real estate. Receipts, service agreements, bills of exchange, guarantees, and powers of attorney all carry stamp duty obligations that accountants and business owners need to track as part of routine operations. This guide focuses on those commercial document categories and breaks down which instruments carry stamp duty, who bears the payment obligation for each, how penalties are calculated, and the practical methods available for paying, including the Revenue Department's e-stamp system.

Which Business Documents Require Thailand Stamp Duty

Thailand's Revenue Code defines a stamp duty schedule of 28 specific instrument categories. Each instrument carries its own rate structure, triggering conditions, and designated liable party. If a document falls under one of these categories and meets the applicable threshold, stamp duty must be paid before or at the time of execution.

The schedule splits broadly into two rate types:

Ad valorem instruments carry a duty calculated as a percentage or per-unit rate based on the document's stated value (e.g., 1 THB per 1,000 THB of contract value).
Fixed-rate instruments require a flat THB amount per document, regardless of the transaction size.

Some instruments set minimum value thresholds below which no duty applies. Certain exemptions also exist under the Revenue Code, including instruments executed by government agencies and documents already subject to specific taxes that replace stamp duty. The full list of exemptions is detailed in the Revenue Code provisions governing each instrument category.

Key Instruments for Business Operations

The table below covers the instruments most frequently encountered in commercial activity. Property-specific instruments (land transfers, mortgages) are excluded here to focus on what matters for day-to-day business document workflows.

Instrument	Category	Trigger / Threshold	Rate	Liable Party
Hire-of-work agreements	Instrument 4	Any contract value	1 THB per 1,000 THB of contract value	Contractor
Loan agreements	Instrument 5	Any loan amount	1 THB per 2,000 THB (or fraction thereof)	Borrower
Bills of exchange	Instrument 9	Any face value	Domestic: 3 THB per bill; International: varies by value	Drawer
Promissory notes	Instrument 11	Any face value	Rates vary by duration and value tier	Maker
Bills of lading	Instrument 13	Per instrument	3 THB per bill (domestic); varies for international	Shipper or carrier depending on terms
Lease agreements (non-property)	Instrument 1	Lease amount stated	1 THB per 1,000 THB of total rent	Lessor
Share transfers	Instrument 16	Any transfer value	1 THB per 1,000 THB of share value	Transferor
Partnership agreements	Instrument 18	Any capital contribution	1 THB per 1,000 THB of capital stated	Partners
Powers of attorney	Instrument 19	Per instrument	10 THB per power of attorney (flat rate)	Grantor
Guarantees	Instrument 17	Guarantee value stated	1 THB per 2,000 THB of guaranteed amount	Guarantor
Receipts	Instrument 28	Payment of 50,000 THB or more	1 THB per 200 THB (or fraction thereof)	Issuer of receipt

Rates above are denominated in Thai Baht (THB). For ad valorem instruments, duty is calculated on the value stated in the document itself, not on the actual cash exchanged.

What This Means in Practice

Four instrument types account for the majority of stamp duty encounters in routine business operations:

Contracts for hire of work (Instrument 4): Any service agreement, construction contract, or outsourcing arrangement. At 1 THB per 1,000 THB, a 500,000 THB service contract requires 500 THB in stamp duty, payable by the contractor.
Lease agreements (Instrument 1): Both property and equipment leases fall under the schedule. The lessor bears the duty obligation based on total rent stated in the agreement.
Receipts (Instrument 28): Every receipt issued for a payment of 50,000 THB or more requires stamp duty. The next section covers Instrument 28 in detail, including the rate calculation and the interaction with Thailand's tax invoice system.
Bills of exchange (Instrument 9): Common in trade finance and import/export transactions. The flat 3 THB rate for domestic bills makes compliance straightforward, but international bills follow a tiered structure based on face value.

The full 28-instrument schedule includes additional categories for insurance policies, warehouse receipts, traveler's checks, and other specialized instruments. For most businesses, however, the instruments listed above represent the bulk of ongoing Thailand stamp duty obligations on contracts and commercial documents.

Instrument 28: How Receipt Stamp Duty Affects Thai Businesses

Of all 28 instruments in Thailand's Revenue Code stamp duty schedule, Instrument 28 is the one most likely to catch businesses off guard. It applies stamp duty to receipts for payments of THB 50,000 or more, and it affects virtually every company operating in Thailand that issues receipts as part of its normal commercial activity.

Yet English-language guides on Thailand stamp duty almost universally ignore it. This is a significant gap, because Instrument 28 is the stamp duty category most directly relevant to everyday invoice and receipt processing workflows.

What Qualifies as a "Receipt" Under Instrument 28

Under the Revenue Code, a receipt in this context is a written document acknowledging that money, property, or goods have been received. This includes receipts issued for:

Goods delivered — acknowledging payment upon delivery of physical products
Services rendered — confirming payment for completed professional or trade services
Amounts collected — any acknowledgment of funds received, including partial payments and installments that individually meet the THB 50,000 threshold

The critical distinction is between a receipt and a tax invoice. Under Thailand's VAT system, VAT-registered businesses issue tax invoices (or in certain retail contexts, abbreviated tax invoices) to document taxable transactions. A tax invoice serves a different legal function: it establishes the VAT obligation and allows the buyer to claim input tax credits. A receipt, by contrast, simply acknowledges that payment has been made.

These are separate obligations. A business that issues a tax invoice for a transaction of THB 80,000 and also issues a receipt acknowledging payment of that same THB 80,000 faces a stamp duty obligation on the receipt. The tax invoice does not absorb or replace the receipt's stamp duty liability. Understanding the key differences between invoices and receipts is essential for determining which documents carry stamp duty consequences under Thai law.

The Rate and How It Applies

The stamp duty rate for Instrument 28 receipts is THB 1 per THB 200, or fraction thereof. In practice, this means:

Receipt Amount	Stamp Duty Owed
THB 50,000	THB 250
THB 100,000	THB 500
THB 200,000	THB 1,000
THB 500,000	THB 2,500

The "or fraction thereof" language matters. A receipt for THB 50,100 does not round down to THB 50,000 for calculation purposes. The extra THB 100 constitutes a fraction of THB 200, so it triggers an additional THB 1 in duty, bringing the total to THB 251.

Why This Catches Businesses Off Guard

The THB 50,000 threshold (roughly USD 1,400) is not particularly high for B2B transactions. Any business regularly invoicing clients for professional services, wholesale goods, construction work, or consulting fees will routinely issue receipts above this amount. A single monthly retainer payment, a modest equipment purchase, or a quarterly service fee can trigger the obligation.

Because stamp duty on receipts is the responsibility of the party issuing the receipt (the payee), businesses cannot shift this cost to their customers unless the contract specifically provides for it. For companies processing dozens or hundreds of receipts per month, the administrative burden of identifying which receipts cross the threshold, calculating the correct duty, and affixing stamps or paying through the e-stamp system adds a compliance layer that many businesses operating in Thailand have not accounted for in their document workflows.

Who Pays Stamp Duty on Each Instrument

The question of who actually bears stamp duty liability in Thailand is not always straightforward. The Revenue Code assigns a default liable party for each of the 28 instruments, and these assignments follow a general principle: the party who derives the primary benefit from the instrument is typically responsible for paying the duty.

But "primary benefit" plays out differently depending on the instrument type. Here are the liable parties for the most commonly encountered business documents:

Hire-of-work agreements (Instrument 4): The contractor pays. The logic is that the contractor benefits from securing the engagement.
Lease agreements (Instrument 1): The lessor pays. As the party granting the right to use property, the lessor is the default liable party.
Receipts (Instrument 28): The person issuing the receipt pays. If your business issues a receipt above the THB 50,000 threshold, you owe the stamp duty.
Bills of exchange (Instrument 9): The drawer pays. The party creating the financial instrument bears the cost.
Guarantees (Instrument 17): The guarantor pays. By extending the guarantee, they assume both the risk and the stamp duty obligation.

These are the Revenue Code defaults. In practice, contractual allocation is extremely common. Parties routinely negotiate who bears stamp duty costs as part of their commercial agreements. A landlord might shift lease stamp duty to the tenant, or a principal might agree to cover the contractor's stamp duty on a hire-of-work contract. These arrangements are legally permissible, but the Revenue Code's designated party remains ultimately responsible if the duty goes unpaid. The Revenue Department will look to the statutory liable party first, regardless of any private agreement between the parties.

When an instrument exists in duplicate or counterpart copies, both copies may require stamping. This is particularly relevant for contracts where each party retains an original. Each copy is treated as a separate dutiable instrument, and the liable party for each copy is determined by the same Revenue Code rules.

A practical complication arises with cross-border transactions where the statutory liable party is a foreign entity. If a foreign company is the designated payer but the instrument is executed in Thailand, the Thai party who holds or uses the instrument effectively becomes responsible for ensuring it is properly stamped. Under Section 105, any person who produces an unstamped instrument in Thailand bears the consequence of its inadmissibility.

Thai businesses entering agreements with foreign counterparties should address stamp duty responsibility explicitly in their contracts rather than assuming the foreign party will handle it from abroad.

Consequences of Non-Compliance: Court Inadmissibility and Escalating Penalties

In most countries, failing to pay stamp duty results in a fine. In Thailand, the consequences cut far deeper. The Revenue Code does not merely penalize unstamped documents with surcharges — it strips them of legal power. An unstamped or insufficiently stamped instrument cannot be admitted as evidence in any Thai court until the outstanding duty and surcharge are paid in full.

This is Thailand's most distinctive stamp duty enforcement mechanism, and one that many companies entering the Thai market fail to anticipate.

Why Court Inadmissibility Changes Everything

Consider the practical reality. You enter a commercial lease, extend a loan, or sign a service contract worth millions of baht. A dispute arises. You go to court to enforce the agreement — and the judge refuses to accept your contract as evidence because it was never properly stamped.

In a contract enforcement action, debt recovery proceeding, or commercial dispute, an unstamped document cannot prove the agreement existed. The opposing party could acknowledge the contract verbally, and your physical copy would still be inadmissible until you resolve the stamp duty deficiency. This transforms stamp duty from a routine tax obligation into a prerequisite for legal enforceability of your commercial documents.

The instrument can be stamped after the fact by paying the original duty plus a surcharge. But the delay introduced mid-litigation — while you scramble to cure the deficiency — hands your counterparty time and tactical advantage you cannot recover.

The Escalating Surcharge Structure

Thailand's penalty framework is designed to punish delay. The longer you wait to cure a stamp duty deficiency, the steeper the cost:

Timing	Duty Owed	Surcharge	Total Cost
Within 90 days of execution	1× the original duty	2× the original duty	3× the original duty
After 90 days from execution	1× the original duty	5× the original duty	6× the original duty

Worked example: An instrument carries THB 1,000 in stamp duty. If you cure the deficiency within 90 days, you pay THB 1,000 (duty) plus THB 2,000 (surcharge) for a total of THB 3,000. Miss the 90-day window, and the total climbs to THB 1,000 plus THB 5,000, reaching THB 6,000 — six times what timely compliance would have cost.

For high-value instruments like property leases or loan agreements where the base duty itself runs into tens of thousands of baht, six-fold penalties add up fast.

Why Enforcement Pressure Is Increasing

Thailand's fiscal environment makes it unlikely that stamp duty enforcement will soften. According to the OECD's 2025 economic assessment of Thailand, the country's public debt is set to climb past 65% of GDP in 2025, up more than 25 percentage points since the pandemic and approaching the legal ceiling of 70%. That fiscal pressure gives the government strong incentive to tighten tax revenue collection across all instruments — stamp duty included.

How Non-Compliance Gets Detected

Businesses sometimes assume that stamp duty goes unnoticed unless they volunteer a document to a court. That assumption is wrong. Non-compliance surfaces through several channels:

Revenue Department audits. Corporate tax audits routinely inspect whether instruments in the company's records carry proper stamps. A single unstamped lease or loan agreement found during an audit triggers the surcharge calculation from the original execution date — not the audit date.
Counterparty complaints. A disgruntled business partner, landlord, or lender can report unstamped instruments to the Revenue Department, either as leverage in a dispute or out of concern for their own liability.
Court proceedings. Any litigation involving documentary evidence will expose stamp duty deficiencies the moment you attempt to submit the instrument. Judges are required to verify stamping before admitting documents into evidence.

The practical takeaway is straightforward: stamp duty compliance is not optional housekeeping. It is a condition of your documents holding legal weight in Thailand, and the cost of curing deficiencies escalates with every day you delay.

How to Pay Thailand Stamp Duty: E-Stamp and Other Methods

Thailand provides four distinct methods for paying stamp duty, each suited to different business contexts and document types. Choosing the right method depends on whether your instruments are physical or electronic, your transaction volume, and your operational setup.

Revenue Stamps (Adhesive Stamps)

The most traditional and still widely used method involves purchasing physical revenue stamps from authorized sellers, including post offices and licensed vendors. You affix the stamp directly to the instrument, then cancel it by writing or stamping the date across the face of the stamp. An uncancelled revenue stamp does not count as proper payment. This method works well for one-off transactions and smaller businesses that handle a limited number of dutiable instruments.

Stamping Machines

Businesses that process high volumes of dutiable documents can apply to the Revenue Department for permission to use a stamping machine. Once approved, the machine imprints a mark directly onto instruments, replacing the need to purchase and affix individual stamps. This method is typically used by banks, insurance companies, and large enterprises that issue hundreds or thousands of dutiable instruments per month.

Cash Payment at Revenue Department Offices

Any instrument can be stamped by paying the duty in cash directly at a Revenue Department office. The department will mark the instrument as stamped upon payment. This method serves as a fallback when other options are impractical and is also the route for late stamping of instruments that were not stamped at the time of execution. Keep in mind that late stamping triggers the same escalating surcharges described above: 2x the original duty within 90 days, rising to 5x after that window closes.

E-Stamp Duty System

Since July 2019, electronic instruments must pay stamp duty through the Revenue Department's online e-Stamp Duty system. Any instrument that is created, signed, or stored electronically falls under this requirement. Physical stamps cannot be used for digital documents.

The e-Stamp Duty platform requires registration with the Revenue Department. Businesses need a valid tax identification number and must register through the Revenue Department's online portal. Once registered, you submit instrument details through the system, pay the applicable duty electronically, and receive a digital stamp certificate as proof of payment. The system generates a unique reference number tied to each instrument, creating an auditable trail that businesses should retain alongside their document records for audit purposes.

This shift reflects Thailand's broader push toward digital tax administration, running parallel to initiatives like Thailand's e-tax invoice and e-receipt system that have been progressively modernizing how businesses handle tax compliance documentation. For companies already operating with electronic contracts, leases, or financial instruments, the e-Stamp Duty system is not optional.

Can you stamp a document after execution? Yes, but the same surcharge structure applies regardless of payment method. Whether you are affixing a late revenue stamp, paying cash at a Revenue Department office, or submitting through the e-Stamp Duty platform, the penalties for late stamping are calculated from the date the instrument was executed. The Revenue Department's official e-Stamp Duty platform provides detailed guidance on registration requirements, supported instrument types, and step-by-step payment procedures.

Stamp Duty Rules for Cross-Border Documents

Thailand's stamp duty obligations do not stop at the border. Any instrument from the 28-category schedule that is executed outside Thailand but subsequently brought into the country for use triggers the same stamp duty liability as a domestically created document. The rate is identical — there is no reduced rate, exemption, or special treatment based on foreign origin.

The rule is straightforward: the first person in Thailand who holds the instrument must pay stamp duty within 30 days of the document entering the country. This 30-day clock begins the moment the instrument arrives on Thai soil, regardless of when it was originally signed or executed abroad.

What "Brought into Thailand" Means in Practice

For multinational companies, this provision has broad reach. Common scenarios include:

Intercompany loan agreements signed at a foreign headquarters and sent to the Thai subsidiary for record-keeping or enforcement
Service contracts between a foreign parent company and its Thai operating entity
Lease agreements for Thai premises executed by a foreign parent or holding company
Powers of attorney prepared and notarized abroad for use in Thai legal or administrative proceedings
Partnership or joint venture agreements finalized overseas that govern Thai operations

In each case, the physical or electronic transmission of the document to Thailand for any operational, legal, or administrative purpose constitutes "bringing in" the instrument.

Penalty Exposure on Cross-Border Instruments

The same escalating surcharge structure applies to late-stamped foreign instruments. Missing the 30-day window subjects the holder to a 2x surcharge if stamped within 90 days, escalating to 5x the original duty amount after 90 days. And just as with domestic instruments, an unstamped foreign document is inadmissible as evidence in Thai courts.

This creates a particular risk for companies that routinely transfer contracts between jurisdictions without a systematic process for identifying stampable instruments. A loan agreement sitting in a Thai office drawer, unstamped, becomes a liability the moment it needs to be produced in a dispute.

Managing Cross-Border Compliance

Organizations with frequent document flows between Thailand and other jurisdictions should establish clear internal protocols: flag instruments that fall within the 28 categories before they are transmitted, assign responsibility for stamping to a specific team member or department in the Thai office, and track the 30-day deadline from the date of arrival. Businesses operating across borders can benefit from digital tools for managing financial document compliance to track stamping deadlines and obligations across jurisdictions, reducing the risk of overlooked instruments accumulating penalty exposure.

Thailand's stamp duty system is granular, but manageable when approached systematically. Identify which of the 28 instruments your business regularly encounters, confirm the liable party and rate for each, and stamp at or before execution. For cross-border documents, the 30-day window from arrival in Thailand is the critical deadline. The cost of compliance is modest. The cost of missing it, between six-fold financial penalties and the loss of your documents' legal standing in Thai courts, is not.