Thai tax forms: what each one is and when it's due

Monthly · VAT

PP30, the monthly VAT return

Once a company is registered for VAT (registration is required when annual revenue passes 1.8M THB), it files PP30 every month, including months with no sales. The return reports output VAT charged on sales, input VAT paid on purchases, and the difference to pay or carry forward.

Who files

VAT-registered companies

Due

15th of the following month

Not registered for VAT yet? VAT registration is part of our company registration and corporate services.

Monthly · Withholding tax

PND 1, PND 3 and PND 53: withholding tax

When a company pays salaries, services, rent or transport, it deducts withholding tax at source and pays it to the Revenue Department the following month. The form depends on who was paid:

• PND 1 for employees' salaries.
• PND 3 for payments to individuals, such as freelancers or a landlord.
• PND 53 for payments to companies.

Common rates are 5% on rent, 3% on services and 1% on transport. Applying the wrong rate means the difference is owed, with a penalty.

Who files

Any company making these payments

Due

7th of the following month

Half-year · Corporate income tax

PND 51, the half-year tax estimate

Halfway through its accounting year, a company estimates its profit for the full year and pays half of the corresponding corporate income tax. The payment is then credited against the annual return.

Who files

Every limited company

Due

Within 2 months after the first 6 months (by end of August for a calendar year)

Annual

PND 50, PND 1 Kor and KT 20: the annual filings

• PND 50 is the annual corporate income tax return, filed with the audited financial statements. Due within 150 days after the accounting year ends (end of May for a calendar year). See our annual audit service.
• PND 1 Kor summarises the year's withholding tax on every employee's income. Due by the end of February.
• KT 20 declares the year's wages to the Workmen's Compensation Fund at the Social Security Office, which sets the employer's contribution. Due by the end of February.