How Much Tax Can Corporate Car Rentals Deduct? A Deep Dive into 2026 Updated Tax Laws
For corporate management in 2026, cost control and tax planning are key to sustainable business growth. One of the main expenses for many companies is “vehicles.” Currently, most organizations prefer to shift from “buying executive cars” to “long-term car rentals” to maintain cash flow and receive better tax benefits.
But the most common question purchasing and accounting departments face is, “How much tax can corporate car rentals deduct?” And what are the conditions regarding non-deductible input tax and withholding tax? In this article, Siam.Rent will take you on a deep dive into the Revenue Department’s latest tax regulations, updated for 2026, in an easy-to-understand way. Once you finish reading, you can immediately apply it to your company’s financial statements.
Table of Contents
- How Much Tax Can Corporate Car Rentals Deduct? (The 36,000 THB Golden Rule)
- The Difference Between “Passenger Cars” and “Commercial Vehicles”
- Can the “Input Tax (7% VAT)” for Corporate Car Rentals be Claimed?
- Withholding Tax (WHT) for Car Rentals
- Can Fuel and Maintenance Costs for Rental Cars be Tax Deductible?
- Case Study: Renting vs. Buying an Executive Car – Which Saves More Tax?
- Frequently Asked Questions (FAQ)
- Restructure Taxes and Reduce Hidden Corporate Costs with Car Rental Services from Siam.Rent
How Much Tax Can Corporate Car Rentals Deduct? (The 36,000 THB Golden Rule)
According to the Revenue Code (Royal Decree No. 315), the Revenue Department has clearly set a ceiling for deducting “car rental fees” as expenses when calculating net profit for corporate income tax. The regulations are as follows:
- Monthly or Yearly Rental: Can be deducted as a corporate expense based on actual payment, but up to a maximum of 36,000 THB / month / vehicle (this amount already includes Value Added Tax or VAT).
- Daily Rental (e.g., renting a car for business in another province): Can be deducted as an expense based on actual payment, but up to a maximum of 1,200 THB / day / vehicle (also includes VAT).
Caution: If your company signs an executive car rental contract for 50,000 THB per month, you can only record 36,000 THB as a tax-deductible expense. The excess of 14,000 THB will be considered a “non-deductible expense” that must be added back when calculating corporate income tax at the end of the year.
The Difference Between "Personal Passenger Cars" and "Commercial Vehicles"
| Rental Car Type (According to Excise Tax Tariffs) | Corporate Expense Deduction Ceiling |
|---|---|
| Passenger cars up to 10 seats (e.g., 4-door sedans, SUVs, PPVs, and 4-door pickup trucks) | Deductible as an expense up to 36,000 THB / month / vehicle |
| Commercial vehicles / Vehicles with more than 10 seats (e.g., single cab pickups, extended cab pickups, passenger vans with 11 or more seats, trucks) | Deductible as an expense 100% of actual cost (No ceiling limit!) |
Can the "Input Tax (7% VAT)" for Corporate Car Rentals be Claimed?
Value Added Tax (VAT) is another area where accountants must be particularly careful when recording car rental expenses. The Revenue Department’s principles in 2026 still refer to Section 82/5(6) of the Revenue Code as follows:
- For passenger cars up to 10 seats: The input tax (7% VAT) arising from the rental or related services of this group of vehicles is considered “non-deductible input tax.” This means the company cannot use this VAT to request a refund or credit against the company’s output tax in the PP.30 form. However, the good news is… the law allows this non-deductible input tax to be included as a “corporate cost or expense” in calculating net profit (provided the total between net rental fee + input tax does not exceed the 36,000 THB/month ceiling).
- For commercial vehicles: The input tax (7% VAT) from renting single cab pickups, extended cab pickups, or trucks can be fully claimed for output tax credit (VAT refund) in the PP.30 form at 100%.
Withholding Tax for Car Rentals
When a company (juristic person) pays car rental fees to a rental company (or natural person), the company has the duty to deduct withholding tax and remit it to the Revenue Department. The rates to remember are:
- 5% Withholding Tax: For asset rental (self-drive car rentals where possession of the vehicle is handed over to the lessee).
- Calculation Example: If a company rents a sedan monthly for 20,000 THB (before VAT), the company must deduct a 5% withholding tax = 1,000 THB, and must issue a withholding tax certificate (50 Tawi form) to the payee every time a payment is made.
Can Fuel, Tolls, and Maintenance Costs for Rental Cars be Tax Deductible?
Many people worry about how additional expenses can be recorded after renting a car. The answer is that they can be fully deducted as corporate expenses for tax calculations at 100% of actual cost (no need to include them in the 36,000 THB rental ceiling). However, there must be clear evidence that they were genuinely used for company business.
- Fuel and toll fees: Must have a full tax invoice or receipt correctly showing the company’s name and address. Importantly, the license plate number of the rented car must be specified on the fuel tax invoice. (Note: The input tax on fuel for passenger cars up to 10 seats remains non-deductible input tax; VAT cannot be claimed, but it can be recorded as an expense).
- Maintenance, tire replacement, Compulsory Motor Insurance (CMI) renewals: If you opt for a long-term Operating Lease with a leading company like Siam.Rent, these miscellaneous expenses are covered 100% free of charge. This saves accountants from the headache of sorting maintenance bills and significantly reduces the workload for HR and purchasing departments.
Case Study: Renting vs. Buying an Executive Car – Which Saves More Tax?
| 5-Year Tax Calculation Conditions | Company A: Buying Car in Cash (2 Million THB) | Company B: Long-Term Car Rental (36,000 THB/month) |
|---|---|---|
| Expense ceiling for tax calculation | Revenue Dept. allows maximum depreciation of only 1,000,000 THB (200,000 THB/year) | Rental fees can be deducted as an expense at 36,000 THB x 12 months x 5 years |
| Wasted tax expenses | The 1,000,000 THB difference must be added back, yielding no tax benefit | No wasted difference because the rental budget exactly meets the Revenue Dept. ceiling |
| Total net tax-deductible value | Deductible as an expense: 1,000,000 THB | Deductible as an expense: 2,160,000 THB |
Frequently Asked Questions (FAQ)
Q: Can input tax for renting a 4-door pickup truck (Double Cab) be claimed?
A: No. A 4-door pickup truck is categorized as a “passenger car and passenger vehicle with no more than 10 seats.” Therefore, its input tax is considered a “non-deductible input tax,” and the rental deduction ceiling is limited to 36,000 THB/month, just like a sedan.
Q: For toll fees without a full tax invoice, can a slip be used instead?
A: In practice, if the toll receipt does not specify the company name, it is recommended to prepare a “Certificate Instead of Receipt” and have the employee claiming the expense attach the evidence and sign to certify that it was used for company business travel to meet a specific client, so it can be used as supporting evidence for Revenue Department audits.
Q: If the car rental fee exceeds 36,000 THB per month, how should it be accounted for?
A: In accounting, record the full actual expense to reflect an accurate profit and loss statement. However, for tax purposes (when filling out the P.N.D. 50/51 form), the portion exceeding 36,000 THB must be recorded as a “non-deductible expense” to be added back when calculating net profit for corporate tax.
Restructure Taxes and Reduce Hidden Corporate Costs with Car Rental Services from Siam.Rent
Managing a vehicle fleet for your business doesn’t have to be a headache anymore! Switch to long-term car rentals with Siam.Rent. We help your organization easily manage and strictly control budgets, allowing up to 36,000 THB/vehicle/month in tax-deductible corporate expenses. Our service covers 1st-class insurance premiums, license plate taxes, and maintenance throughout the contract period. No worries when a car breaks down, as we provide 24-hour roadside assistance and replacement vehicles ready for immediate use.
👉 Save both your company’s time and capital! Contact our experts for consultation, to receive offers, and get a B2B long-term car rental quotation today at Siam.Rent
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