In mid-August, Sri Lanka's Inland Revenue Department re-revised its guidance on quarterly income tax installments for 2026-2027, adjusting the rules taxpayers must follow as they plan and pay during the year. The change is a second revision, a reminder that tax obligations are often shaped in layers, each correction building on the last. Those who expect to owe nothing must now prove it, those whose prior-year figures remain unsettled are offered a provisional path, and everyone must track which version of the forms applies to which quarter. Much of the circular remains unexplained in the avai
Sri Lanka Re-Revises Quarterly Tax Installment Circular for 2026-2027, Tightening Filing Rules
A claim of zero is no longer enough on its own.
Mark
What actually happened here?
Mimi
On Aug. 12 Sri Lanka's Inland Revenue issued a re-revised circular on quarterly income tax installments for 2026-2027.
Mark
What changes for taxpayers?
Mimi
Anyone claiming no taxable income and no expected assessable income has to submit declarations backing that up.
Luke
Is that a new burden, or just clarified?
Mimi
The reporting says it is a requirement of this circular. It does not say how it compared with the earlier versions.
Mark
And the estimated tax statements?
Mimi
If the prior year's computation isn't final by the first installment date, taxpayers can use final SETs. They file on Attachment 1 for Q1 2026, then a revised Attachment 1 from Q2 2026 on, with one amendment allowed.
Luke
Do we know everything the circular says?
Mimi
No. The text we have breaks off partway through the list, so there is at least one more provision we can't describe.
Luke
Then we shouldn't call this a full picture.
Mark
What should filers watch?
Mimi
Which form version applies to which quarter, and any further compliance guidance from the department.
O Pulso
- A second round of revisions lands on taxpayers who were only just adjusting to the first.
- Filers claiming zero taxable income must now back that claim with supporting declarations, removing the easy assumption that nothing is owed.
- Where last year's tax computation is still unfinished when the first installment falls due, taxpayers can lean on final estimated tax statements to keep moving.
- The switch from Attachment 1 for Q1 to a revised form from Q2 onward forces careful tracking, while an unseen fourth provision remains an open question.
In mid-August, Sri Lanka's Inland Revenue Department re-revised its guidance on quarterly income tax installments for 2026-2027, adjusting the rules taxpayers must follow as they plan and pay during the year. The change is a second revision, a reminder that tax obligations are often shaped in layers, each correction building on the last. Those who expect to owe nothing must now prove it, those whose prior-year figures remain unsettled are offered a provisional path, and everyone must track which version of the forms applies to which quarter. Much of the circular remains unexplained in the available material, so its full meaning is still taking shape.
On August 12, Sri Lanka's Inland Revenue Department issued Re-Revised Circular No. SEC/2026/E/06, updating the rules for quarterly income tax installments in the 2026-2027 period. The word "re-revised" tells its own story: taxpayers are being asked to shift again within a framework they were already working to master.
The circular asks several things of filers. Those who believe they have no taxable income and expect none must now submit declarations supporting that position, so a simple claim of zero is no longer sufficient. For those whose prior-year tax computation is not finished by the first installment date, the circular offers a route: final statements of estimated tax, known as SETs, can be used in its place.
Filing these statements follows a timeline of its own. The first quarter of 2026 uses Attachment 1, while the second quarter and each quarter after require a revised Attachment 1. A single amendment to a submitted statement is permitted.
The source text appears to break off before the circular ends, pointing to at least one further provision whose content is not available here. Any full account of the circular should therefore be read as provisional. What comes next is whether the department issues compliance guidance to help filers navigate these changes.
On Aug. 12, Sri Lanka's Inland Revenue Department issued Re-Revised Circular No. SEC/2026/E/06, the latest version of its guidance on quarterly income tax installments for the 2026-2027 period. The name alone tells part of the story: this is a re-revision, a second round of changes to rules that taxpayers are already working under.
The circular sets out several requirements. The first concerns taxpayers who claim they have no taxable income and expect no assessable income. Under the re-revised circular, they must submit declarations supporting that status. A claim of zero is no longer enough on its own.
The second concerns timing. Installment calculations normally lean on the prior year's tax computation, but that computation is not always finished by the time the first installment falls due. The circular lays out a procedure for that situation. Taxpayers may use final statements of estimated tax, known as SETs, in place of waiting for the earlier year's figures to be settled.
The third point covers how those statements are filed. Taxpayers who rely on final SETs must submit them using Attachment 1 for the first quarter of 2026. For the second quarter of 2026 and every quarter after, they must use a revised version of Attachment 1. The circular allows one amendment to a submitted statement.
The source text is cut off after the third item, and it indicates the circular contains at least a fourth provision. What that provision says is not available in the material at hand, so any account of the circular's full scope should be treated as incomplete.
The practical effect of what is known is clear enough. Filers who expect to owe nothing now carry a documentation burden. Filers whose prior-year position is unsettled have a defined route forward, but one tied to specific forms and a single permitted correction. The change in attachment between the first and second quarters means filers must track which version applies to which period.
The circular's reference to Q1 2026 inside a 2026-2027 framework suggests the installment schedule does not line up neatly with the calendar year, though the source does not explain the schedule. What to watch next is whether the Inland Revenue Department publishes further compliance guidance, and what the remaining provisions of the circular require of taxpayers.
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