CIT vs VAT: Understanding Accrual Basis vs Tax Point - Critical Guide for Thai Business Owners

Why Revenue in CIT Returns Doesn't Match VAT Returns? Understanding Accrual vs Tax Point Accounting Principles

Solving the mystery! Why is revenue for calculating Corporate Income Tax (CIT) not equal to the tax base in VAT returns? This article compares "Accrual Basis" and "Tax Point" with 5 common real-world examples.

Have you ever wondered why the sales figures you file in monthly VAT returns (Por.Por.30) don't match the revenue in your financial statements used for Corporate Income Tax (Por.Ngor.Dor.50) when summed up at year-end? This difference isn't an error but results from fundamentally different tax principles between Corporate Income Tax and Value Added Tax.

This confusion can lead to incorrect tax filings, unnecessary surcharges and penalties, and may even trigger audits by the Revenue Department. This article from Orbit Advisory clearly compares the "Accrual Basis" for income tax versus "Tax Point" for value-added tax, with 5 common business examples where these differences are most apparent, to help you apply these principles correctly and plan your taxes properly.

Understanding "Accrual Basis" - The Heart of CIT Returns

For calculating net profit subject to Corporate Income Tax, the Revenue Code mandates using the "Accrual Basis" as the principle, in accordance with the implication of Section 65 of the Revenue Code.

Key principles of the accrual basis include:

• Revenue Recognition: When revenue is "earned" (Earned), even if cash has not yet been received. For example, when goods are delivered or services are completed, revenue is considered earned and must be recorded in that accounting period immediately
• Expense Recognition: When expenses are "incurred" (Incurred), even if cash has not yet been paid. For example, when services have been received from suppliers, they must be recorded as expenses in that accounting period

💡 In short: The accrual basis focuses on the "right" to receive money or "obligation" to pay money, not on actual cash inflows or outflows.

Understanding "Tax Point" - The Heart of VAT Returns

Conversely, Value Added Tax (VAT) doesn't follow the accrual basis but looks at the Point of Tax Liability (Tax Point) or the time legally specified when operators must pay VAT, which references Section 78 of the Revenue Code.

Generally, the Tax Point occurs when one of the following events occurs first:

1. Goods are delivered
2. Title to goods is transferred
3. Payment for goods/services is made
4. A tax invoice is issued

As you can see, "payment" and "tax invoice issuance" are key factors that make the timing of revenue recognition for VAT completely different from the accrual basis.

Comparing 5 Common Items with Different Revenue/Expense Recognition

To illustrate clearly, let's examine 5 common real-world case studies showing the differences between these two principles.

Summary Comparison Table

Detailed Analysis of Each Case Study

1. Service Revenue

Your company provides consulting services worth 100,000 baht.

• Timeline: Services completed and work delivered to customer on December 25, 2025. Tax invoice/receipt issued upon full payment receipt on January 15, 2026
• Recording for CIT (Accrual Basis):
• You must recognize 100,000 baht revenue in the 2025 financial statements because the service was completed in that year
• Recording for VAT (Tax Point):
• The Tax Point occurs in January 2026, the month payment was received. Therefore, you must issue a tax invoice and file VAT returns in Por.Por.30 for January 2026

2. Advance Payments/Deposits

Your construction company receives a 30% deposit of 300,000 baht for a construction project on June 10th.

• Timeline: Deposit received on June 10th, but construction work begins in August
• Recording for CIT (Accrual Basis):
• As of June 10th, the 300,000 baht is not yet recognized as revenue but recorded as "Unearned Revenue" in current liabilities
• Recording for VAT (Tax Point):
• The Tax Point occurs immediately in June when payment is received. You must issue a tax invoice for the 300,000 baht amount and file VAT returns in Por.Por.30 for June

3. Installment Sales

An electrical appliance company sells a refrigerator for 24,000 baht with 12 monthly installments of 2,000 baht each.

• Timeline: Refrigerator delivered to customer on July 1st. First installment due July 31st. Title to goods hasn't transferred to buyer upon delivery until buyer completes all agreed installments
• Recording for CIT (Accrual Basis):
• The company must recognize full sales revenue of 24,000 baht in July, the month of goods delivery
• Recording for VAT (Tax Point):
• The Tax Point occurs according to each installment's due date. Therefore, the company must issue tax invoices for 2,000 baht monthly and file VAT returns accordingly for 12 months

4. Prepaid Rent

Your company pays office rent one year in advance for 240,000 baht on January 1st.

• Tenant side (Expense recording):
• CIT: Must recognize as expense of 20,000 baht monthly (240,000 / 12) throughout the year
• VAT: Can claim full input tax credit according to tax invoice received in January
• Landlord side (Revenue recording):
• CIT: Must recognize as rental revenue of 20,000 baht monthly throughout the year
• VAT: Tax Point occurs when full payment is received in January. Must issue tax invoice and file VAT returns on full 240,000 baht in Por.Por.30 for January

5. Export of Goods

A company exports processed fruits to Japan.

• Timeline: Goods delivered to freight forwarder on March 30th, but export declaration shows customs clearance date as April 2nd
• Recording for CIT (Accrual Basis):
• Generally recognizes revenue in March, the date of goods delivery and risk transfer to buyer (depends on agreed Incoterms)
• Recording for VAT (Tax Point):
• Tax Point for exports is the date on the export declaration. Therefore, must report the sale (at 0% rate) in Por.Por.30 for April

⚠️ Warnings and Risks of Incorrect Recording

Recognizing revenue and expenses according to incorrect legal principles directly impacts taxes payable:

• Value Added Tax (Por.Por.30): If under-reporting VAT sales (e.g., received deposit but didn't file VAT), you'll face surcharges of 1-2 times the unpaid tax amount and additional interest at 1.5% per month on the tax amount due
• Corporate Income Tax (Por.Ngor.Dor.50): If under-recognizing revenue or over-recognizing expenses, resulting in lower reported net profit than actual, you'll face surcharges and interest at the same rates

Summary

The fact that revenue figures in CIT returns and VAT returns don't match is normal and correct according to tax principles. The important thing is that business owners and accountants must understand how each transaction should be recorded under "Accrual Basis" for income tax and "Tax Point" for value-added tax.

Understanding these differences not only helps in correct tax filing but also provides an important foundation for cash flow planning and efficient business tax planning. If you're unsure or have complex transactions, consulting experts is the best choice.

Need consulting to establish accounting and tax systems compliant with laws and reduce audit risks? Contact Orbit Advisory today to get advice from our experts.

Frequently Asked Questions (FAQ)

Q1: Can small companies use "Cash Basis" for calculating Corporate Income Tax?

A: No, for registered companies or limited partnerships, the Revenue Code mandates using only "Accrual Basis" for calculating net profit subject to tax.

Q2: Is there an offense if tax invoices are issued later than the Tax Point date?

A: Yes, issuing tax invoices late carries criminal penalties, and if the delay causes missing VAT returns for that month, you'll face surcharges and additional interest as mentioned above.

Q3: How should bad debts be handled for income tax and VAT purposes?

A: For income tax, writing off bad debts as expenses must follow the criteria in Ministry of Finance Regulation No. 186. For VAT, selling bad debts to recover previously paid output tax as input tax must follow the criteria specified in the Revenue Department Director-General's Announcement on Value Added Tax (No. 85), which has different conditions.

Q4: If a company receives post-dated checks for service fees, when does the Tax Point occur?

A: The Tax Point occurs when the company can actually collect money on the check, or the date written on the check itself, not the date when the physical check is received.

Q5: If errors are found in previous month's records, what should be done?

A: You must file Additional Returns for the Por.Por.30 of the month with errors, paying the tax shortfall including surcharges and additional interest (surcharge reduction can be requested), and correct the accounting records to avoid affecting the year-end Por.Ngor.Dor.50 filing.