Business VAT Calculator
The Business VAT Calculator estimates a tax and statutory rate estimate for your scenario from the quantities, rates, period, units and other assumptions requested on the page. Replace the example values with your own business vat figures and recalculate after changing an assumption. Treat it as a planning estimate and independently verify the current rule or provider terms.
[updated year 2026]
Calculate the VAT to be transferred to the taxpayer Output VAT Subtract Input VAT
Output VAT (collected from the customer)
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Input VAT (paid to the seller)
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VAT that must be submitted to the Revenue Department
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❓ Frequently Asked Questions
Which business needs to register for VAT?
Businesses with revenues exceeding 1,800,000 baht per year must register for VAT within 30 days. Businesses with revenues below this may register voluntarily.
What is the difference between Output VAT and Input VAT?
Output VAT is the VAT charged to the customer Input VAT is the VAT paid when buying goods / services must be delivered = Output VAT - Input VAT
What date is the VAT filing deadline?
File the 30-F form by the 15th of the following month or e-file until the 23rd of each month. Failure to file or late filing is fined.
What are the business exemptions?
Businesses exempt from VAT are education, hospitals, measuring, agriculture, exports, certain real estate, check the tax announcement.
What size business must register for VAT?
Entrepreneurs whose income from selling products or services exceeds 1,800,000 baht per year must register for VAT within 30 days from the date their income exceeds.
What are VAT Input and Output Tax?
Output VAT: Tax collected from customers | Input VAT: Tax paid to suppliers | Tax that must be remitted to the Revenue Department = Output VAT - Input VAT. If negative, receive a refund or credit the next month.
What products and services are exempt from VAT?
Fresh food, unprocessed fruits and vegetables, live animals, fertilizers and insecticides, newspapers/magazines, health/education services, domestic passenger transportation
What is the difference between VAT Zero Rate and VAT Exempt?
Zero Rate (0%): VAT paid but 0% rate applied for exports — still can claim Input VAT | Exempt (excepted): VAT paid but not claim Input VAT
English calculator guide
How to use the Business VAT Calculator
Use this page to test a specific business vat scenario. Enter your own values in the calculator above, review the units beside each field, and recalculate after changing an assumption. The result updates the business vat estimate instead of relying on a generic example.
- Build a baseline business vat case with figures that match your situation.
- Run a second business vat case after changing the rate, period, quantity or other key assumption.
- Record the difference between the two business vat results and the input responsible for it.
Inputs for the business vat estimate
For this business vat calculation, check the quantities, rates, period, units and other assumptions requested on the page. The result is designed to show a tax and statutory rate estimate for your scenario, not a guaranteed provider price or official decision.
How the business vat result is calculated
The calculator applies the displayed statutory rates, thresholds and allowances to the figures you enter. Reusing the same business vat inputs will produce the same estimate, which makes the page suitable for controlled scenario comparisons.
Checks for a business vat decision
Confirm any current rate, threshold or provider rule that could change the final amount. For business vat, Use the result as a commercial planning estimate. Confirm supplier prices, payment-provider fees, taxes, minimum charges and contract terms before setting a price or budget. Because this calculation can affect an important financial, legal or health decision, independently verify the inputs and current rules before relying on the result.
- Language QA
- Terminology, numeric values and calculator controls checked
- Calculator scope
- Tax and statutory rate
- Last English review
- 26 July 2026