Thailand Patent Fee Calculator

ThailandPatents.com’s Patent Fee Calculator provides clear, practical estimates of the costs involved in securing and maintaining patent protection in Thailand. Whether you are filing an invention patent, design patent, or petty patent, this tool helps you understand the expected expenses at each stage—from initial filing to long-term maintenance. It is a valuable resource for applicants looking to plan ahead and navigate Thailand’s patent system with confidence.

Important Disclaimer: Please note that all figures provided by this calculator are estimates only and should not be treated as final legal or financial advice. Official fees are subject to change by the Department of Intellectual Property, and professional service fees may vary depending on your specific needs and circumstances. For an accurate and customized cost breakdown, we recommend consulting with a qualified Thai patent professional.

Why Choose Our Thailand Patent Fee Calculator?

✔ All-Inclusive Estimates: Get instant, comprehensive estimates covering government fees, patent agent service fees, and translation costs in one calculation.

✔ Broad Coverage: Supports all major filing routes – PCT National Phase, Paris Convention, and Direct Filing – for Invention, Petty, and Design Patents.

✔ Flexible Service Tiers: Tailor your support needs, from Filing Only to full Filing-to-Grant packages (including up to 2 Office Actions).

✔ Smart Translation Estimator: Calculates translation fees from English, Japanese, or Chinese to Thai based on word or character count.

✔ Multi-Currency Support: View your estimated costs conveniently in your preferred currency: USD, EUR, JPY, RMB, or THB.

✔ Transparent & Private: Enjoy instant estimates with no sign-up required, hidden charges, or confusing terms. Your privacy is assured.

✔ Expert-Built & Trusted: Created by a Thailand registered patent agent with over 20 years of experience handling local and international filings.

✔ Personalized Guidance Available: Have questions about your estimated costs or next steps? Easily connect with expert professionals for a personalized discussion.

Why Use Our Patent Annual Fee Calculator?

✔ Multi-Year Projections: Estimate annual fees across any start and end year to support long-term budgeting and IP planning.

✔ Optional Grace Period Surcharge: Check the box to include a 30% late payment fee for renewals during Thailand’s official grace period.

✔ Up-to-Date DIP Fees: Based on the latest annual fee schedule from Thailand’s Department of Intellectual Property.

✔ Clear Financial Insights: Understand future financial commitments with precise, year-by-year breakdowns.

✔ Seamless Portfolio Management: Plan renewals across multiple patents with ease, supporting efficient and proactive IP strategy.

✔ Fast, Private, and Convenient: No sign-up required — get instant, secure results in your preferred currency.

Understanding Patent Costs in Thailand

Navigating the financial landscape of intellectual property protection in Thailand requires a clear understanding of costs that go beyond the initial filing. Patent costs in Thailand include fees for the application stage, prosecution and examination, translation, and ongoing maintenance through annual annuity payments. Whether you're filing an invention patent, design patent, or petty patent, knowing the full cost structure is essential for effective budgeting and long-term IP planning.

The route you choose to pursue patent protection also influences costs. You may file directly with Thailand’s Department of Intellectual Property (DIP), claim priority under the Paris Convention, or enter the national phase through the Patent Cooperation Treaty (PCT). Each option carries distinct procedural requirements and cost implications that applicants should consider carefully.

Key Cost Components of Patent Protection in Thailand

Government Fees

The Thai DIP charges official fees at key stages throughout the patent lifecycle. These include the initial application fee, publication fee, request for substantive examination (for invention patents), grant fee, and recurring annual maintenance fees (annuities) required to keep the patent in force after grant. The total government fee depends on the type of patent and the timeline of actions taken.

Professional Patent Agent Fees

Most applicants choose to work with a registered Thai patent agent to handle filing, prosecution, and annuity payments. For foreign applicants without a domicile or residence in Thailand, appointing a local patent agent is legally required.

Patent agent fees in Thailand vary based on the complexity of the application, the number of office actions expected, and the scope of service. Many firms offer package pricing—for example, filing only or filing through to grant—which can help applicants better plan and control costs.

Translation Costs

Thailand requires that patent specification documents be filed in Thai. This includes the title, abstract, claims, description, and any text in the drawings. Translation costs are typically calculated based on the source language—such as English, Chinese, or Japanese—and the total word or character count. High-quality translation is critical to avoid delays or rejections during examination and ensures technical accuracy.

Other Potential Costs

Beyond the standard fees, applicants should be aware of other potential costs that may arise on a case-by-case basis. These could include fees related to appeals, opposition proceedings filed by third parties, enforcement actions against infringers, or specific requests that fall outside routine prosecution.

FAQs About Patent Filing Costs in Thailand

How much does it cost to file a patent in Thailand?

The total cost depends on the type of patent (invention, design, petty), the chosen filing route (direct, Paris, PCT national phase), and whether translation is required. Government fees for an invention patent filing, for instance, are 500 THB, with additional official charges for publication, examination, and grant. Applicants must also budget for professional service fees and, if applicable, translation costs.

Can I estimate the full cost from filing to grant?

Yes. Our calculator provides an estimate based on your selected service package (e.g., Filing Only, Filing to Grant). These estimates typically include government fees, agent fees, and translation costs relevant to the filing and prosecution stages.

Do I need to pay extra if my application has many claims or pages?

No. Unlike some jurisdictions, Thailand’s DIP does not charge additional government fees based on the number of claims or pages. However, a higher word or character count will increase translation costs.

When do I need to pay the request for examination fee?

For invention patents in Thailand, the request for substantive examination must be filed within five years from the date of publication, not the filing date. The official fee for requesting substantive examination is 250 THB, and it must be paid at the time of the request. If the request is not filed within this period, the application will be considered withdrawn.

When is the first annual fee due for a Thai invention patent?

The first annual fee for a Thai invention patent is due on the fifth anniversary of the filing date, but only after the patent has been granted. No annual fees are payable while the application is pending. After grant, any unpaid annual fees that would have been due based on the filing date must be paid in a lump sum before the patent is issued.

Is there a surcharge for late payment of annual fees?

Yes. If an annual fee is not paid by the due date, a 30% surcharge applies during the 120-day official grace period. If payment (with surcharge) is not made within this grace period, the patent rights will lapse and generally cannot be reinstated.

Are annuity (annual) fees refundable if the patent is withdrawn or lapses?

No. Once paid, annual fees are non-refundable, even if the application is later withdrawn, rejected, or the patent lapses due to non-payment in future years.

Can I pay multiple years of annual fees in advance?

Yes. After a patent is granted, you may pay several future years of annual fees in advance if desired. This is often done to avoid missing deadlines or incurring surcharges.

Can I renew a petty patent in Thailand?

Yes. A petty patent has an initial term of 6 years and can be renewed twice — each for 2 additional years, for a maximum total term of 10 years. The renewal fees apply for each additional two-year period.

What's NOT Included in Our Calculator / Estimates Disclaimer

It’s important to understand the scope of our cost estimates. Our calculators are designed to provide typical government fees, professional agent fees, and standard translation costs related to filing and maintaining patents in Thailand. However, they do not include:

• Fees for complex legal opinions, strategic advice, or customized services beyond standard application prosecution

• Costs for prior art searches, patentability assessments, or freedom-to-operate (FTO) analyses that typically occur before filing

• Additional government or agent fees resulting from unexpected office actions or requests from the Department of Intellectual Property

• Expenses associated with responding to oppositions, appeals, or third-party challenges not covered under basic service packages

• Legal fees related to disputes, enforcement, infringement proceedings, or invalidation actions

These items often vary significantly based on the circumstances of each case and are best discussed with your patent agent or legal advisor.

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