e-Tax Invoice investment exemption self-check (editable workbook)
What is exempt is income, not tax — say that first, because reading it the other way doubles the figure. The workbook keeps the decree's three heads of spending apart: article 4 (the e-document side), article 5 (the tax remittance side) and article 7 (three classes of service fee). The thing most often misfiled is the reach of the six conditions: article 6 opens with "assets under articles 4 and 5", so the service fees under article 7 fall outside its subject. For a BOI company there is a hard limit on top: assets used in a business enjoying corporate income tax exemption under the investment promotion law, the national competitiveness enhancement law or the EEC law are carved out, and the clause says "whether wholly or partly" — so a company running both lines has to split asset attribution before it aggregates anything. The detailed rules sit with a Director-General notification; the timing of the claim and the supporting documents are for an adviser to settle.
01What is exempt is income, not tax
The clause grants exemption from corporate income tax on income "equal to the expenditure", in an amount of one hundred per cent of what was actually paid. What it exempts is the income, not the tax payable. Read as "one hundred per cent of the tax", a client's figure comes out at twice the benefit.
The value lies in the stacking: the expenditure itself is still relieved the ordinary way — ordinary deduction for expenses, depreciation under section 65 bis (2) of the Revenue Code for assets — and this decree gives a further slice of exempt income on top. The two together are what the measure is worth.
When that hundred per cent is claimed, in which accounting period, against what documents, and whether assets are claimed at once or spread — the decree does not say. Articles 4, 5 and 7 all end on the same sentence: in accordance with the rules, procedures and conditions prescribed by the Director-General. So the qualifying amounts can be aggregated now, but the timing of the claim is an amber cell, to be checked against the notification in force before filing.
02Three heads of spending, because they do not reach the same people
The decree splits the spending three ways, and the persons each reaches are not the same — this is where aggregation most often goes wrong.
- Article 4 — the e-document side. Investment in electronic data preparation systems and electronic data receiving systems, or purchase of computer programs, electronic certificate storage devices, computers and equipment used with them, for preparing, sending, receiving or keeping e-Tax Invoices or e-Receipts. Its second paragraph carves out two kinds of business: providers of e-document preparation or transmission services themselves, and developers writing software to sell or supply to others.
- Article 5 — the tax remittance side. Investment in tax remittance systems, or purchase of the corresponding software and hardware, for remitting withholding tax, income tax or VAT under section 3 Panaras of the Revenue Code. Its scope runs the opposite way to article 4 — it names tax remittance service providers among those it reaches, rather than excluding them.
- Article 7 — three classes of service fee. (1) Fees paid to providers of e-document preparation or transmission services, electronic certificate fees and electronic data storage (Cloud Storage) fees; (2) the same classes of fee paid to tax remittance service providers; (3) information system assessment fees and related charges paid to the Electronic Transactions Development Agency (ETDA) in order to qualify as a provider of e-document preparation or transmission services.
Article 7(3) and the second paragraph of article 4 look contradictory but are not: one governs spending on your own use, the other the compliance cost of qualifying as a provider. All three share one timing rule: actually paid between 1 January 2026 and 31 December 2027, judged by the payment date, not the date of the contract or the invoice.
03The six conditions have assets as their subject, not service fees
This is why the workbook gives them a sheet of their own. Article 6 opens with "assets under article 4 and article 5 shall…", then lists six: never previously used; depreciable under section 65 bis (2) and acquired and in a condition ready for use according to its purpose by 31 December 2027; located in the Kingdom; used for not less than three consecutive accounting periods counted from the first accounting period in which it was acquired and ready for use; not an asset receiving related tax benefits under other royal decrees issued under the Revenue Code; and not an asset used in a business enjoying corporate income tax exemption under the investment promotion law, the national competitiveness enhancement law for targeted industries, or the EEC law. The last two both end on the same words: whether wholly or partly.
On the subject of the clause, article 7 service fees sit outside article 6 — a fee is not an asset, so it does not carry conditions such as "never previously used" or "three consecutive accounting periods". That is not a small point: a company whose systems turn over within three years has to count the cost of early disposal on the asset side, while the fee side is not bound by it.
But do not read that as "service fees have no threshold". Article 7 confines itself to expenditure for the company's own business, and all three articles hang on the same sentence about the Director-General's notification. So the workbook marks this cell amber: what the clause says is set down as it stands, and whether you can aggregate on that basis is for an adviser to settle, not something to conclude before the notification appears.
04Running both BOI and non-BOI lines: split first, aggregate second
Article 6(6) is a hard limit for a BOI company. Spending on e-invoicing systems used on a BOI-exempt line cannot also take this decree; the clause reads "whether wholly or partly", so a single machine used even in part on an exempt line puts the whole claim at risk of being struck out.
So for a company running both, the order is: attribute the assets to a line first, then decide which part takes the relief. Splitting at filing time is usually too late to assemble the supporting documents — which is why the workbook gives the split a sheet of its own.
Article 6(5) has to be read alongside it: an asset that has already taken related tax benefits under another royal decree issued under the Revenue Code cannot stack this one on top. Together the two limbs say — this relief does not stack with relief from the same source, and does not coexist with an exempt business line.
05Which cells are deliberately left blank
Clause numbers, the period of application and the text of the six conditions are fixed in the decree and can be traced back by clause number, so the workbook gives them. What moves case by case is marked amber:
- Which article your spending falls under — it follows how and why the money was spent, not the description on the invoice.
- The timing and documentation of the claim — the decree hands these to a Director-General notification, and as at our retrieval date no such notification has been seen, so the workbook gives no method of claiming and states no countdown.
- Which business line an asset belongs to — the split between exempt and non-exempt lines follows actual use, not the purchasing department.
- Whether service fees can be aggregated on article 7 alone — the subject of the clause supports the reading, but it needs an adviser to settle against the notification and the facts.
- Whether your company is on the list published by the Director-General — the definition in article 3 confines an "e-Tax Invoice" to one prepared by a registered operator whose name the Director-General has published, a layer that sits outside the relieving provisions and is easily skipped whole.
Which article each item of your spending falls under, which assets have to be split by line first, and whether fees already paid in the first half of 2026 can be picked up, all have to be checked item by item against payment records, asset use and line attribution, and verified against the official text and notification in force before filing.
What is in the workbook
- Aggregation by head of spending: article 4 (e-document systems and equipment), article 5 (tax remittance systems) and article 7 (three classes of service fee), each row carrying the clause number, who it reaches, what it covers, what it expressly excludes, and whether the six asset conditions reach that row
- The same rows show that articles 4 and 5 run in opposite directions on scope — article 4 excludes service providers and software developers, while article 5 names tax remittance service providers as among those it reaches
- Six-condition self-check: the six limbs of article 6 set out one by one, with the sheet heading recording that the subject of that article is "assets under articles 4 and 5", so article 7 service fees sit outside it
- Business-line split: a five-step order for companies running both BOI-exempt and non-exempt lines, each step naming what to check, where the conclusion goes, and what follows if it is skipped — built around the words "whether wholly or partly"
- Payment ledger: left blank by design, add rows as needed, with columns for payment date, business-line attribution, internal hand-off date and owner, for use as an internal control sheet before payment
- Cells that move case by case are amber: which clause the payment falls under, the timing and documentation of the claim, which line an asset belongs to, and whether service fees can be aggregated on their own — all left for an adviser to settle against your payment records
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Common questions
- Does this exempt one hundred per cent of the tax?
No. What the clause grants is exemption from corporate income tax on "income equal to the expenditure", in an amount of one hundred per cent of what was actually paid — it is the income that is exempt, not the tax payable. Read as "one hundred per cent of the tax", the figure comes out at twice the benefit. The value is in the stacking: the ordinary deduction or depreciation on the expenditure is unaffected, and this gives a further slice of exempt income on top. The amount and the way it is claimed have to be settled against the company's actual business lines and the notification in force.
- Do the article 7 service fees also have to meet the six conditions?
On the subject of the clause, no. Article 6 opens with "assets under article 4 and article 5 shall…", and a fee is not an asset, so it does not carry conditions such as "never previously used" or "three consecutive accounting periods". But do not read that as fees having no threshold: article 7 confines itself to expenditure for the company's own business, and articles 4, 5 and 7 all hang on the same sentence about the Director-General's notification. The workbook marks this cell amber — the clause is set down as it stands, and whether you can aggregate on that basis is for an adviser to settle.
- We are a BOI company. Can we still use this?
It depends which line the asset is used on. Article 6(6) carves out assets used in a business enjoying corporate income tax exemption under the investment promotion law, the national competitiveness enhancement law for targeted industries or the EEC law, and the clause reads "whether wholly or partly" — a single machine used even in part on an exempt line puts the whole claim at risk of being struck out. A company running both lines has to attribute its assets to a line first and then decide which part takes the relief; splitting at filing time is usually too late to assemble the documents. The workbook gives that split a sheet of its own.
- Can spending already paid in the first half of 2026 still count?
On timing it is within range. All three articles share one rule: actually paid between 1 January 2026 and 31 December 2027, judged by the payment date rather than the contract or invoice date; the decree was published in October 2026 but its period of application runs from 1 January 2026. So the go-live costs, annual service fees and storage fees already paid this year are worth going back over. But being within the period is only the first gate — the class of spending, the six asset conditions and the line attribution still have to be passed, and the timing and documentation of the claim await the Director-General's notification, which has not been seen as at our retrieval date.
Related
Sources
- Royal Gazette: Royal Decree issued under the Revenue Code on Revenue Tax Exemption (No. 808) B.E. 2569, volume 143, part 64 Kor, pages 4 to 9, signed and published on 12 October 2026; article 2 brings it into force from the day after publication. Cited here: article 3 (the definitions of e-Tax Invoice, e-Receipt, electronic certificate, electronic data preparation system, electronic data receiving system, tax remittance system and electronic data storage, together with the requirement that the document be prepared by a person whose name the Director-General has published), article 4 (the e-document side and the two carve-outs in its second paragraph), article 5 (the tax remittance side and whom it reaches), article 6 (the six asset conditions), article 7 (the three classes of service fee), and the closing statement of reasons (recording that Royal Decree No. 766 applied until 31 December 2025). Checked page by page against the original PDF on 2026-10-31
- Revenue Department (Thailand): the Department's published copy of the same instrument, dc808.pdf (the same text as the Royal Gazette version). Retrieved and checked 2026-10-31
- General note: the exemptions under articles 4, 5 and 7 all apply in accordance with the rules, procedures and conditions prescribed by the Director-General of the Revenue Department, and no such notification has been seen as at our retrieval date; the timing of the claim, the supporting documents, and whether asset expenditure is claimed at once or spread, are outside the scope of this workbook. The conditions that apply are those in force at the time of filing; this workbook is not a filing opinion on any particular case.
Once the workbook has sorted the spending by clause, which assets have to be split by business line, and when the claim can be made, depend on your payment records and the notification in force.
中文版 · Chinese version