Is tax planning legal in Thailand?

Yes, when it means organising real transactions within the law — choosing timing, structure and documentation that the Revenue Code supports. It is distinct from concealment or fabricated expenses, which are offences. Every recommendation we give identifies the specific legal provision it relies on.

What is the corporate income tax rate in Thailand?

The standard rate is 20 percent of net profit, with reduced progressive rates available to qualifying small and medium enterprises below defined capital and revenue thresholds. The thresholds and conditions change from time to time, so confirm the current schedule with the Revenue Department before relying on a figure.

Can past overpaid tax be recovered?

A refund claim is possible within the statutory period, generally three years from the filing deadline, but it invites scrutiny of the return. We quantify the claim, assemble the evidence and advise whether the refund justifies the review that usually follows it.

How is advisory work charged?

A review of your position is free. Specific advice is quoted in writing as a fixed scope per question or per project, so you approve the fee before the work starts.

English desk

Tax planning and advisory for companies in Thailand

Tax planning in Thailand is about sequencing and structure, not avoidance schemes: when revenue is recognised, how expenses are documented, which withholding rate applies to a payment, and whether a transaction should happen this year or next. We advise in writing, in English, so the reasoning survives staff turnover and can be shown to an auditor or the Revenue Department later.

Request a written quote contact@thailaw-accounting.co.th

Phone +66-92-017-0000 · LINE and email accepted in English.

What this service covers

Annual tax position review

Before the year closes we project the corporate tax charge, identify deductible items at risk of disallowance, and list actions that must happen before 31 December to count.

Withholding tax mapping

Every recurring payment type in the business is mapped to its correct withholding rate and certificate obligation, so the 1, 2, 3 or 5 percent question stops being a monthly debate.

VAT structure review

Where a business mixes standard-rated, exempt and zero-rated activity, we review the invoicing structure so input VAT recovery is maximised within the rules.

Written opinions for specific transactions

For a planned sale, dividend, loan or restructuring, the tax treatment is documented in a memo the board can rely on and file with the company records.

How the engagement runs

1. Fact gathering
We review the trial balance, the past two years of filed returns and the contracts behind the largest transactions, because planning from incomplete facts produces advice that fails under examination.
2. Written recommendation
Each recommendation states the legal basis, the saving or exposure in baht, the deadline for action and the documentation needed to support the position.
3. Implementation in the books
Agreed actions are built into the chart of accounts and the monthly close, so the planning survives contact with the actual bookkeeping.
4. Review at year end
The position is re-checked against final numbers before the annual return is filed, and carried forward into next year's calendar.

Deadlines, rates and filing formats change. Confirm current requirements with the Revenue Department, the Social Security Office and the Department of Business Development, or ask us to confirm them for your case before you rely on a date.

Planning that survives an inspection, not just a spreadsheet

Advice that reduces a tax bill is only useful if it holds when someone official asks how the figure was reached. In Thailand that question tends to arrive years later, when the person who made the decision has moved on and the only remaining witness is the file. Everything we recommend is therefore accompanied by a written rationale and the supporting documents that make the position explainable to a third party.

The most valuable planning is rarely exotic. It comes from matching the depreciation policy to how equipment is really used, from documenting management charges between related entities so they are defensible, from checking each year whether small-company thresholds still apply, and from fixing the recurring add-backs that quietly raise taxable profit every single period. Those adjustments compound, and none of them relies on an aggressive reading of the law.

Cross-border arrangements deserve separate attention. Payments abroad for services, interest or the use of intellectual property attract withholding obligations, and the relief available under a double tax agreement depends on documentation obtained before the payment is made rather than after. We review these arrangements while they are still being negotiated, when the terms can still be shaped.

Owner remuneration

The balance between salary and dividends changes the combined corporate and personal burden, and the right mix moves as profitability changes. We recalculate it from actual results, not from a rule of thumb.

Incentive eligibility

Promotional privileges and enhanced deductions carry conditions on activity, capital and reporting. Losing eligibility unnoticed is more expensive than never claiming it.

Documentation before implementation

A resolution, an agreement and a pricing note prepared at the time cost very little; recreating them under inquiry is far harder and much less persuasive.

Reviewing positions before the year closes, not after

Almost every meaningful tax decision has a deadline attached to it that falls before the accounts are finalised. Whether an expense is deductible depends on how it was documented when it was incurred; whether a payment abroad qualifies for treaty relief depends on a residence certificate obtained beforehand; whether an asset is written off over three years or twenty depends on a classification recorded at acquisition. Advice delivered while the accountant is preparing the return arrives too late to change any of them.

For that reason we run a review during the year rather than only at the end of it. Mid-year is the point at which projected profit becomes visible, the half-year estimate has to be justified, and there is still time to bring forward or defer a decision for legitimate commercial reasons. It is also the moment to check that the deductions being claimed each month have the evidence behind them that a later examination would look for.

Timing is often worth more than any single deduction. Deciding when to recognise a large repair, when to bring an asset into use, when to invoice a milestone and when to settle a bonus all shift profit between periods, and shifting profit into a year with unused losses or a lower effective rate produces a real saving without touching anything contentious. Those decisions need to be made while the events are still ahead of you, which is why we schedule the conversation for the middle of the year.

Groups with more than one Thai entity need an additional layer. Charges between related companies must reflect what an unrelated party would have agreed, and that has to be recorded in a written arrangement with a basis for the amount. Where entities share staff, premises or intellectual property, the allocation method should be consistent from year to year, because an unexplained change is itself a question.

Losses carried forward

Accumulated losses are usable for a limited number of years and can be affected by significant changes in ownership or activity. Knowing the expiry profile changes when it makes sense to accelerate income or expenditure.

Personal and corporate together

For owner-managed companies the two returns interact. Optimising one in isolation frequently increases the other, so the calculation we present covers the combined position rather than the corporate line alone.

Handling it in-house versus engaging us

Reading summaries of Thai tax rules is a reasonable way to form questions, but implementing a position without the supporting file is a liability that stays hidden until it is examined. The hours a director spends interpreting notifications are hours removed from running the business, and the interpretation is rarely complete. A standing adviser who follows the changes throughout the year turns that risk into a scheduled review.

Every engagement is quoted individually after we review your documents and agree the scope, so you know the fee and the timeline before any work starts. Send the details on LINE or by email and we will come back with a written proposal.

Common situations we are hired for

A profitable year and a large PND.50 estimate

Timing of deductible expenses, depreciation choices and provisions can move the charge legitimately — but only if the documentation exists before year end.

Paying dividends to shareholders

Withholding on dividends, the timing of the distribution and its interaction with the shareholders' own position are planned together rather than discovered at payment.

Intercompany charges to an overseas parent

Management fees and service charges to foreign related parties carry withholding and documentation obligations; we set the structure before the first invoice, not after an assessment.

Losses carried forward

Thai tax losses carry forward five years. We verify the loss position was correctly computed in the years it arose before building it into current planning.

See the English-speaking accounting firm overview, all accounting services or the province pages below.

Questions owners ask first

Is tax planning legal in Thailand?: Yes, when it means organising real transactions within the law — choosing timing, structure and documentation that the Revenue Code supports. It is distinct from concealment or fabricated expenses, which are offences. Every recommendation we give identifies the specific legal provision it relies on.
What is the corporate income tax rate in Thailand?: The standard rate is 20 percent of net profit, with reduced progressive rates available to qualifying small and medium enterprises below defined capital and revenue thresholds. The thresholds and conditions change from time to time, so confirm the current schedule with the Revenue Department before relying on a figure.
Can past overpaid tax be recovered?: A refund claim is possible within the statutory period, generally three years from the filing deadline, but it invites scrutiny of the return. We quantify the claim, assemble the evidence and advise whether the refund justifies the review that usually follows it.
How is advisory work charged?: A review of your position is free. Specific advice is quoted in writing as a fixed scope per question or per project, so you approve the fee before the work starts.

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