Thailand BOI Announcement 3/2569 (2026): Economic Recovery Stimulus — 2 Billion Baht, 12-Month Capex Deadline, 5 Extra Years at Half CIT

Matter Snapshot

• Client profile: Foreign-capitalized manufacturer, regional HQ investor, or large-format service operator planning a ≥2B THB capex expansion in Thailand in 2026.
• Triggering event: The 2026 application window under BOI Announcement 3/2569 (issued 15 January 2026) is open for one calendar year only.
• Core risk: Misreading the eligibility conditions (activity group, 8-year CIT cap, excluded sectors) — or failing to deploy 2B THB of actual capex within 12 months of the certificate — results in forfeiture of the additional 5-year 50% CIT reduction, with no second chance under this measure.
• Time sensitivity: Resolution acceptance and document submission deadlines under this measure are non-extendable per Clause 2.4. Internal capital commitment, board approval, and structuring decisions should be sequenced so that the certificate is issued with enough runway to deploy 2B THB in 12 months.

Issue

A foreign-capitalized project sponsor is considering a large-scale capex commitment in Thailand and needs to decide, under time pressure, whether to (a) apply for ordinary BOI promotion under the Section 16 / Section 35 framework alone, or (b) additionally apply for the Economic Recovery Stimulus under Announcement 3/2569 to obtain a further 5 years of 50% CIT relief. The core legal questions are: (i) does the project fall within the eligible scope, (ii) can the sponsor realistically meet the non-negotiable capex and filing deadlines, and (iii) what is the downside of missing any of them?

Rule

Announcement 3/2569 is issued by virtue of Section 16 and Section 35 of the Investment Promotion Act B.E. 2520 (1977), as amended, and supplements the baseline Policies and Criteria set out in Announcement No. 8/2565 (8 December 2022). The operative rules are set out below exactly as they appear in the official (unofficial translation) text.

1. Geographic scope

"All provinces are designated investment promotion zones."

There is no zone-based preference, ring-fence, or corridor requirement. This is a nationwide measure.

2. Eligibility conditions (Clause 2)

3. The additional incentive (Clause 3)

"The promoted project is eligible for a 50% reduction from the normal rate of corporate income tax on the net profit derived from the investment for a period of 5 years from the expiry date of the corporate income tax exemption."

Two points are worth noting. First, the 50% reduction applies only to net profit derived from the promoted investment — not to the sponsor's other income streams. Ring-fencing and proper allocation of revenues, costs, and capex will determine the economic value of the benefit. Second, the 5-year clock begins only after the existing CIT exemption expires, so the measure extends, rather than duplicates, the base incentive.

4. Application window (Clause 4)

"This measure applies to applications submitted from the first working day of 2026 to the last working day of 2026."

This is the only temporal gate. The measure does not carry forward into 2027. Projects that miss the 2026 application window lose access to the stimulus entirely, irrespective of their readiness or investment size.

5. Delegated approval authority (Clause 5)

The Office of the Board of Investment (OBOI) is delegated full authority to approve or disapprove project amendments for additional incentives under this measure for projects of all sizes, and to consider extensions of the evidence filing deadline as appropriate.

Application

The impact of Announcement 3/2569 turns on three fact patterns that are easy to get wrong.

Pattern 1 — A4 project just over the 2B THB threshold

A foreign-capitalized component manufacturer plans a 2.1B THB capex expansion under a Group A4 activity. The base A4 incentive provides 3 years of CIT exemption capped at 100% of eligible investment. If the sponsor files its application within 2026 and deploys 2B THB of non-land, non-working-capital capex within 12 months of certificate issuance, the project obtains an additional 5 years of 50% CIT relief on net profit from the investment, starting in Year 4. In absolute CIT terms, this can double the headline relief window of an A4 project from 3 years to 8 effective years of preferential treatment.

Pattern 2 — A1 project already at the 8-year CIT ceiling

A technology project classified as Group A1 already benefits from 8 years of uncapped CIT exemption. Clause 2.2 limits the stimulus to projects whose aggregate CIT exemption does not exceed 8 years. The project is at the ceiling. It may still apply, provided the 8-year aggregate is not breached by other promotions; but if any layered measure already pushes the total above 8 years, Announcement 3/2569 is unavailable. This is a common trap for projects stacking Section 11 ter (IBC) or Targeted/Competitiveness Enhancement incentives on top of A1.

Pattern 3 — Data center or on-site power-generation component

A mixed-use project proposes a manufacturing facility and an on-site data center and captive power plant. Clause 2.1(3) excludes "activities classified as Data Center and the production of electricity." The manufacturing component may still be promoted and enjoy the additional incentive, but the data center and electricity production components are expressly carved out. Sponsors must structure the project so that each component is classified and promoted separately, and must be careful that revenue and capex attributable to the excluded components do not leak into the calculation of the promoted investment's net profit.

Pattern 4 — 12-month capex misalignment

A foreign sponsor applies in Q3 2026 and obtains its promotion certificate on 30 November 2026. The 12-month capex clock begins on that date. If land acquisition, EIA, construction permits, or equipment lead times push actual capex below 2B THB by 30 November 2027, the additional incentive is forfeited — Clause 2.4 prohibits extension of the resolution acceptance or certificate document deadlines, and Clause 2.6 bars a second bite at the apple. Machinery importation and full-operation deadlines are extendable, but those are downstream of the 12-month capex requirement.

Conclusion

For projects classified in Groups A1–A4 that are (a) within the 8-year CIT aggregate ceiling, (b) outside the excluded sectors (air/maritime transport, mandatory SBP/SEZ, data center, electricity production), and (c) already planning a committed capex of at least 2B THB within 12 months of certificate issuance, Announcement 3/2569 materially improves the after-tax economics — a further 5 years of 50% CIT relief on net profit from the investment, beginning from the expiry of the base CIT exemption.

For projects that cannot realistically meet the 12-month capex threshold, or whose activity is excluded, the measure is not available — and attempting to structure around the exclusions typically triggers downstream classification disputes. The measure should be analysed before capex is committed and before the application is lodged, because Clauses 2.4 and 2.6 together leave no procedural recovery path once a deadline is missed.

The practical sensitivity is therefore not the incentive itself — which is clearly defined — but the sequencing of board approval, application filing, certificate issuance, capital deployment, and evidence submission. A 2026 application filed in January gives the sponsor the maximum runway to deploy 2B THB inside the 12-month window; a December filing will almost always miss.

Immediate Actions

1. Map the project to its Group A classification under Announcement 8/2565. Confirm it is A1, A2, A3, or A4 and that it is not caught by any of the three exclusions in Clause 2.1. If the project straddles a promoted activity and a data center/electricity production component, plan the component separation now.
2. Audit the aggregate CIT exemption position. Pull all existing promotion certificates and stacked measures (IBC, Competitiveness Enhancement, Targeted Industries, Southern Border). If the aggregate already reaches or exceeds 8 years, re-run the economics — the stimulus is unavailable.
3. Lock the capex plan to the 12-month certificate-to-deployment window. Pressure-test land acquisition, EIA, construction permit, and equipment lead times against a 12-month capex deployment timeline. If the plan requires more than 12 months of lead time from certificate issuance to 2B THB of actual investment, the measure cannot be delivered — regardless of how strong the underlying economics are.
4. Set the internal filing target at H1 2026. Clause 2.4 prohibits extension of the resolution acceptance and certificate document deadlines. A Q1 or Q2 2026 application preserves maximum runway; a Q4 2026 application compresses the 12-month capex window into 2027 with no extension relief.
5. Instrument the evidence-of-investment file from day one. Clause 2.5 requires filing on the OBOI-prescribed form within 18 months of certificate issuance, with remaining CIT entitlement (both period and limit) intact. Build capex tracking so the evidence package can be filed without retrospective reconstruction, and do not allow the base CIT exemption to run out before filing.
6. Engage local counsel at the structuring stage. Clause 2.6 forecloses a re-application for additional incentives under this measure once a project has been found non-compliant. Structuring errors that would be recoverable elsewhere are terminal here.

FAQ

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Q1. Does my project qualify for Announcement 3/2569 if it sits just below the 2 billion baht threshold?

A1. No. Clause 2.3 requires actual capital investment of at least 2 billion baht, excluding land costs and working capital, within 12 months of the promotion certificate being issued. A project at, for example, 1.9 billion baht of qualifying capex falls outside the measure, regardless of how compelling the underlying economics are. The threshold is a bright-line rule, not a range — and there is no tapered benefit for projects below it.

Q2. Our project is classified A1 and already enjoys 8 years of CIT exemption. Can we still use this measure?

A2. You are at the ceiling set by Clause 2.2, which requires aggregate CIT exemption not exceeding 8 years. If no other promotion or stacked incentive (for example, an IBC Section 11 ter or Competitiveness Enhancement layer) pushes the total beyond 8 years, you can apply. If the combined entitlement already exceeds 8 years, Announcement 3/2569 is not available. A quick audit of every subsisting BOI certificate and each stacked incentive should be the first step.

Q3. We plan to include a data center and a captive power plant in our industrial project. Can they piggyback on the stimulus?

A3. No. Clause 2.1(3) expressly excludes activities classified as Data Center and the production of electricity from this measure. If your project is a manufacturing facility with on-site data center and power components, the manufacturing component may still be eligible, but the data center and electricity-production components must be promoted — if at all — under other measures. Economic modelling should ring-fence the eligible and excluded components; revenues and costs attributable to the excluded components must not contaminate the "net profit derived from the investment" calculation for the 50% reduction.

Q4. What happens if we receive the certificate in late 2026 and the capex runs past 12 months?

A4. The project forfeits the additional incentive. Clause 2.4 is explicit: extensions of the deadlines for acceptance of resolution and for submission of documents to obtain the certificate are not permitted. The 12-month actual-capex requirement in Clause 2.3 is tied to the certificate issuance date and cannot be reset. Clause 2.6 then bars the project from re-applying for additional incentives under this measure in the future, although the project may reapply for ordinary BOI promotion. Machinery importation and full-operation deadlines are extendable in appropriate cases, but those extensions do not cure a missed 12-month capex milestone.

Q5. When does the 5 years of 50% CIT relief actually start, and how is "net profit from the investment" computed?

A5. Under Clause 3, the 5-year period starts on the expiry date of the existing CIT exemption — so the additional incentive extends, rather than duplicates, the base CIT exemption. The 50% reduction applies only to net profit "derived from the investment," meaning the revenues and costs attributable to the promoted project under this measure. In practice, sponsors must keep segmented accounting for the promoted activity, apportion joint costs rigorously, and be prepared to defend the allocation to the Revenue Department. Poor segmentation is one of the top reasons expected benefits do not materialise on audit.

Q6. The announcement says applications must be submitted within 2026. Does that include the time required to obtain the certificate?

A6. No. Clause 4 governs application submission, not certificate issuance. A complete application filed on, for example, 20 December 2026 is still within the window, even if the certificate is issued in 2027. However, because Clause 2.4 prohibits extension of the resolution acceptance and certificate document submission deadlines, and Clause 2.3 ties the 12-month capex clock to the certificate issuance date, a very late 2026 filing compresses the deployment runway into 2027 with no extension. We recommend internal filing targets in H1 2026 to preserve runway.

Sources

Lexcelsiam Note

This material is for general information only and does not create a lawyer-client relationship. The BOI's English version of Announcement 3/2569 is expressly marked "Unofficial Translation" — for any filing or capital-commitment decision, the Thai-language original controls, and matters involving project classification, the 8-year CIT aggregate, or evidence-of-investment filing should be reviewed against the Thai text and the OBOI's prescribed forms. Where the outcome depends on activity classification, sequencing of stacked incentives, intra-group allocation, or timing against non-extendable deadlines, a matter-specific legal review is required.