Calculate Your Thai Patent Fees

Patent Application Filing Cost Calculator

Use this tool to estimate the official fees and our professional charges for filing a new patent application (including standard patents, petty patents, and design patents) in Thailand. The estimate will vary based on your selected options.

Thai Patent Strategy Insights

In the complex world of international patent filings, cost clarity is essential for effective decision-making. Our patent fee calculator delivers fast, transparent insights into the potential expenses of protecting inventions and designs in Thailand.

This comprehensive tool offers:

• All-inclusive estimates

• Support for multiple filing routes

• Integrated translation calculations

• Flexible service packages

It’s a powerful resource for preliminary budgeting and confident proposal development — reflecting our firm’s commitment to proactive transparency and operational efficiency.

By offering this level of visibility, we help patent attorneys, corporate IP managers, and international applicants deliver more accurate cost projections, build trust, and respond faster to cross-border IP demands.

This calculator embodies our mission to simplify Thailand’s IP cost landscape — empowering smarter, faster, and more confident decision-making.

Important Note on Estimates

This calculator provides non-binding preliminary estimates only. It does not include disbursements, 7% VAT, or added fees for complex cases. Figures are subject to change. For a precise quote, please contact us via the Request a Quote form.

Patent Annual Maintenance Fees

After grant, maintaining your patent rights in Thailand requires timely payment of annual fees (annuities). These fees apply to invention patents, petty patents, and design patents, and are essential to keeping your rights in force.

While annuity fees begin accruing from the 5th year of filing, they are only due after grant. Any unpaid years must be settled in a lump sum. A 120-day grace period is available for late payments, subject to a 30% surcharge.

Lump-sum payment options available: 140,000 THB for Invention Patents (years 5-20), 2,000 THB for Petty Patents (years 5-6), and 7,500 THB for Design Patents (years 5-10).

Use the calculator to instantly estimate recurring official fees and plan your IP budget with confidence.

Ready for a Quote?

The calculators on this page provide preliminary cost estimates for your convenience. For a precise quotation tailored to your specific invention, the nuances of your application, or complex international filings, we are ready to provide a detailed and binding proposal. This will ensure full transparency and clarity regarding your investment in intellectual property protection in Thailand.

You can Request a Personalized Quote or Contact Us to discuss your specific needs.

How Patent Fees Are Structured in Thailand

Understanding the full cost structure of patent protection is essential for budgeting and compliance. In Thailand, official fees are typically divided into the following stages:

Filing Stage: Fees are due when the application is submitted to the Department of Intellectual Property (DIP).

Publication Stage: A fee is charged to publish the patent after a formality check.

Examination Stage: For invention patents, a fee is required when requesting substantive examination (within five years of publication).

Grant Stage: Once the patent is approved, a grant fee must be paid before issuance.

Maintenance Stage (Annuities): Annual fees become due from the 5th year after filing but are payable only after grant.

In addition to the core stages, applicants may encounter additional government fees depending on the circumstances of the case. These may include fees for opposition proceedings, appeals against refusals, and recordation of changes in ownership.

Translation Requirements

All patent documents — including the specification, claims, abstract, and any explanatory text in drawings — must be filed in Thai. Translation costs depend on source language and total word or character count

Our calculator estimates translation fees automatically, helping you budget more accurately.

Common Questions About Patent Costs

Get quick answers to common questions about patent costs, payment methods, and recurring fees in Thailand. This section is designed to help you better understand the financial aspects of protecting your intellectual property.

Are government fees and disbursements included in the filing cost estimate?

Our quotes clearly itemize official government fees, patent agent service fees, and estimated translation costs. However, disbursements (such as bank charges or courier fees) and 7% VAT are not included in the calculator estimate but are specified in personalized quote.

Can I get a binding quote without an initial consultation?

Yes. We can provide a binding quotation without requiring a consultation, provided that we receive clear and complete information about your invention and the desired scope of services. For complex matters, we may recommend a brief consultation to ensure accuracy before finalizing the quote.

How can I pay for your services?

We accept bank transfers (wire transfers) for international clients. Detailed payment instructions, including acceptable currencies, will be included in your invoice and service agreement to ensure smooth and timely payment.

What are the recurring costs after a patent is granted?

The only recurring cost after a patent is granted is the annual maintenance fee (annuity) payable to the Department of Intellectual Property (DIP). If you choose to have us manage these payments, optional professional service fees may also apply. Use our Annual Fee Calculator to estimate the official annuity fees for your patent.

Do you offer cost estimates for services beyond filing, such as litigation or invalidation?

Yes. While our calculators focus on filing and maintenance fees, we also offer custom quotes for services such as patent oppositions, invalidation actions, and enforcement proceedings. These estimates are provided upon request following a preliminary case review.