中税泰国CTAC Thailand
BOI incentives · start-of-operations deadline and back-planning

The BOI 36-month deadline to start operations, and how to back-plan it

In short

A promoted project must finish construction and apply to start operations within 36 months of the date the certificate is issued. Miss that date without having obtained an extension and promoted status is affected. The hard part is not the number 36 — it is that the same starting gun locks three chains together: equipment imports, first revenue and the start-of-operations inspection, and if any one of them stalls it drags the start of operations down with it.

01Three countdowns that start on the certificate date

Three countdowns begin on the day the certificate is issued. Owners usually remember only that they have to start operations, and miss the fact that starting operations depends on the first two chains running through first: the equipment has to arrive, the line has to run, and there has to be real output before there is anything to apply for an inspection on.

The three run from the same day but are approved through different channels. An extension of the equipment import window, an explanation of first-revenue progress, and an extension of the operations deadline go to different desks — one application does not settle all three. If you need more time, you apply for each separately, and in every case before the date falls. More on the equipment import window.

02Why 36 months is often not enough

Thirty-six months sounds generous. What eats the time is usually not the construction itself.

String these together and the time left for actually building the plant is often half of what was on paper.

One separate anchor worth keeping straight: corporate income tax exemption runs from the date of first revenue, not from the certificate date.

03Back-planning: lock four milestones from the end

Do not schedule forward from today. Work backwards from the 36-month date and lock four milestones.

Leave a buffer in front of each milestone — in our experience one to two months for every milestone that depends on a third-party approval. The schedule that comes out of this is the master plan for your three years.

04What to do when you can see you will not make it

What matters is acting before the date, not after it. Each of the three deadlines has its own extension or explanation channel, but they share one precondition: you have to raise it within the period, with the objective reasons for the delay and a new completion plan. Once the date has passed, there is much less room to work with.

In practice the steadiest approach is to put the three countdowns on a single board the project team sees, and update actual progress against plan once a month. The moment any one of them slips by more than two months, start assessing an extension — rather than dealing with it when the quarterly report raises the question. What has to be filed after the certificate.

Which date your own project counts from, how much slack is left against each of the three, and whether extension material should be prepared now all have to be checked item by item against your certificate date, your construction and procurement schedule, and the approval status of the machine list. This kind of back-planning is usually worked out once in full by our advisers and then handed to the project team to execute — more reliable than each department planning its own leg. What the BOI filing engagement covers.

Related

Sources

  1. Board of Investment (BOI): the operations deadline and the start-of-operations inspection — a project must complete construction and apply for the start-of-operations inspection within 36 months of the date the certificate is issued; duty-free imports of machinery have their own separate window and their own extension route (extensions may be applied for, with the number of extensions and the years allowed following the rules in force). Checked 2026-07
  2. Board of Investment (BOI): the project progress reporting regime — progress towards first revenue from the promoted business is reported quarterly, and a project running behind must explain itself to the responsible division or apply for an extension. This is not the same channel as the equipment import extension. Checked 2026-07
  3. General note: the deadlines, the number of extensions available and the approval channels are updated by BOI announcement, and particular incentive measures and industry categories have their own arrangements. This page does not list the number of extensions or the penalties; the announcements in force from the Board of Investment (BOI) (boi.go.th) and the conditions written into your own promotion certificate prevail.
Checked against the official texts by the CTAC Thailand advisory team. We track the gazettes of the BOI, the Revenue Department, the Department of Business Development and Thai Customs every week; when an official position changes, the affected pages are updated and dated.
This page is general information based on the rules in force at the date shown. Thai BOI categories, incentive conditions and foreign-investment rules change often. Before acting on any specific project, check the latest official announcement and have a formal opinion issued on your own facts.
This is work you can hand to our advisers

BOI filing: tier assessment, document preparation, submission and follow-up. You confirm and decide.

中文版 · Chinese version