Guide to Expat Tax Filing in Thailand

Guide to Expat Tax Filing in Thailand

Thailand’s tax system may seem daunting at first, but with the right knowledge and preparation, you can manage your tax obligations with confidence. Whether you are an employee, a business owner, or retired, we will cover the key aspects of tax filing in an easy 10 step process.

Our goal is to make your tax filing experience as straightforward as possible, helping you avoid common pitfalls and ensuring you take advantage of available benefits and allowances. By following this guide, you will gain a clear understanding of your responsibilities and the steps necessary to file your tax return correctly.

Let’s get started on making your tax filing process in Thailand smooth and stress-free. 

Step-by-Step Guide to Obtaining a Thai TIN and Submitting Tax Filings

STEP1: Understanding the need for a TIN

Obtaining a Thai Taxpayer Identification Number (TIN) and filing your taxes are crucial steps for anyone remitting foreign income, working, investing, or conducting business in Thailand. The TIN aligns with global standards like the OECD’s Common Reporting Standard, ensuring transparent financial information exchange. Follow this step-by-step guide to ensure compliance with the Thai Revenue Department. 

Foreigners must have a valid visa and work permit (for individuals) or proof of business registration (for companies). 

STEP2: Prepare Required Documents

To apply for a Thai TIN, gather the following documents: 

FOR INDIVIDUALS: 

  • A copy of your passport with a valid visa and work permit. 
  • A copy of your house registration or rental agreement in Thailand (if applicable). 
  • A completed TIN application form (L.P. 10.1), available at local Revenue Department offices. 

 

FOR COMPANIES: 

  • A copy of the company's business registration certificate. 
  • The company's tax registration form. 
  • Identification documents of the company directors. 

STEP3: Submit Your TIN Application

Visit the nearest Thai Revenue Department office to submit your TIN application. 

  • You can locate your local office through the Revenue Department’s official website: https://www.rd.go.th. 
  • Applications are typically processed within 1–2 weeks. 

STEP4: Gather Information for Tax Filing

After obtaining your TIN, you’ll need the following information for tax filing: 

  • Your income statement (e.g., payroll slip or business income records). 
  • Proof of any deductible expenses, exemptions, or allowances. 
  • Bank statements or transaction records if applicable to remitted income. 

STEP5: Access the Thai Revenue Department e-Filing System

Taxpayers can file their taxes electronically via the e-Filing System on the Revenue Department’s website. 

  1. Visit: https://efiling.rd.go.th. 
  2. Register your account using your TIN and personal details. 
  3. Log in to access forms and filing services. 

STEP6: Fill Out and Submit Tax Forms

  1. Choose the appropriate tax form:
    1. Personal Income Tax (PIT): Form PND 91 (employees) or PND 90 (freelancers or those with additional income).
    2. Corporate Tax: Form PND 50 (annual filing) or PND 51 (mid-year filing).
  2. Complete the form with your income, deductions, and allowances.
  3. Upload supporting documents, if required.

STEP7: Pay Any Outstanding Taxes

After submitting the form, the system will calculate your tax liability. Payments can be made:

  • Online through the Revenue Department’s e-Payment system.
  • At banks or authorized financial institutions.

STEP8: Meet Filing Deadlines

  • Personal Income Tax: File by March 31 of the following year.
  • Corporate Tax: File the mid-year return (PND 51) by August 31, and the annual return (PND 50) by May 31 of the following year.

STEP9: Monitor Filing and Retain Records

Retain copies of your submitted tax forms and payment receipts for 5 years, as required by Thai tax laws.

Check your filing status on the e-Filing portal to ensure no errors or omissions.

Penalties for Non-Compliance 

  • Late Filing: A surcharge of 1.5% per month on unpaid taxes. 
  • Incorrect Filing: Fines up to 200% of underpaid tax, plus possible criminal liability for deliberate evasion. 

For assistance with your Thai TIN application or tax filing, consult our team of experts to ensure compliance and avoid costly penalties. 

Understanding Thai tax filing deadlines and methods 

The deadlines for filing tax returns in Thailand are critical to meet to avoid penalties. 

PND90/91 personal tax returns need to be submitted within 3 months of the year-end date for paper filings and 3 months and 8 days of the year end for eFilings. 

Half year PND94 personal tax return (within 3 months of the half year-end date) Individuals who have received income under section 40 (5) – (8) of the Revenue Code, with non-salary income like as income from rent, commissions, royalties, professional fees, dividends etc., have to report income earned from January to June and pay taxes with the a half-year personal income tax return (PND 94 form).  

Tax returns can be filed electronically through the Revenue Department’s e-filing system or via hard copy submissions at local tax offices. 

Penalties for late filing and payment 

Failing to pay taxes on time results in a 1.5% monthly surcharge on the due amount. If no tax form is submitted or if the tax paid is less than due, fines equal to or double the tax due can be imposed. 

 

Penalties and surcharges 

A taxpayer in Thailand who is assessed by an assessment officer as submitting inaccurate returns or who failed to file a return is subject to a penalty. The penalty rate is 100% of the total taxed owed for an inaccurate return (so double the actual tax owed) and the rate is 200% for failure to file a return (tripling the amount that is owed).  The penalties could be reduced to 50% if the taxpayer submits a written request to consider and if the assessment by the officer deems the taxpayer has no plan to evade their tax liabilities. 

Any person who fails to pay or remit tax within the specified time is liable to pay a surcharge of 1.5% per month for the total amount of tax owed, up to a total of 100% of the tax owed. The revenue department can demand documents and records for inspection for a period of two years, which can be extended to 5 years if it is found there is a reason to believe there was tax evasion. The revenue department can assess tax for up to 10 years. As well as fines, there is also the potential for imprisonment. 

Let Business Class Asia Manage Your Thai Tax Returns

Let our expert team handle your Thai Tax Returns with precision and care. From obtaining your Taxpayer Identification Number (TIN) to ensuring accurate filings and maximizing your deductions, we simplify the entire process while ensuring full compliance with the latest Thai Tax Updates. Avoid costly penalties and gain peace of mind—contact us today to make your tax management seamless and hassle-free! 

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