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Current-year deadline planner

Sri Lanka Tax Calendar 2026

A reviewed 2026 compliance calendar built from the official IRD Tax Calendar 2026 and current employer remittance rhythms for Sri Lankan teams.

Audience: Finance teams, compliance managers, payroll leadsUpdated: 2026-03-12Estimated time: Review time ~12 minutes
  • Separates monthly payment dates, filing dates, and annual submission milestones
  • Uses the official IRD current-year calendar for APIT, WHT, VAT, SSCL, and income-tax dates
  • Adds EPF and ETF reminders so payroll and finance teams can work from one schedule

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Monthly recurring deadlines for 2026

CycleDeadlineItemNotes
Monthly15th day of each monthAPIT and WHT paymentsRemit deductions for the prior month
Monthly20th day of each monthVAT payment and SSCL paymentPay the liability for the prior month
MonthlyLast day of each monthVAT return filingFile the preceding taxable period online
MonthlyLast working day of each monthEPF and ETF remittanceSubmit employer contributions for the preceding month

Quarterly and instalment checkpoints

DateItemWhy it matters
20 April 2026SSCL quarterly return for Jan-Mar 2026Close the first quarter with reconciled turnover support
15 May 2026Fourth self-assessment income-tax instalment for Y/A 2025/2026Settle the final instalment before the annual return cycle
20 July 2026SSCL quarterly return for Apr-Jun 2026Tie turnover back to VAT and management reports
15 August 2026First self-assessment income-tax instalment for Y/A 2026/2027Start the next assessment year with a current estimate
20 October 2026SSCL quarterly return for Jul-Sep 2026Confirm quarter-end turnover before the filing date
15 November 2026Second self-assessment income-tax instalment for Y/A 2026/2027Refresh estimates before the return deadline

Annual milestones in the 2026 calendar

DateItemNotes
30 April 2026Annual APIT statement and annual WHT statement for Y/A 2025/2026Complete the employer and withholding schedules early
30 September 2026Final income-tax payment for Y/A 2025/2026Clear the balance before filing the return
30 November 2026Income-tax return for Y/A 2025/2026Applies to individuals, companies, and partnerships where relevant

Operating notes for teams using the calendar

Use the calendar as an operating schedule, not just a reminder list, so finance, payroll, and tax teams work from the same dates and evidence trail.

  • Assign one owner for each deadline and a second reviewer for payment evidence and filing acknowledgements
  • Where a due date falls on a non-working day, plan submissions in advance instead of relying on same-day extensions
  • Store every return, payment reference, and supporting computation in the same monthly folder used for the close process

Need help putting this into action?

WinCore consultants can implement the processes outlined in this resource. Pick the next conversation that fits your needs.

Plan tax deadlines with our teamCoordinate payroll compliance

You might also need

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Income Tax Calculator Worksheet (2025/2026)

A reviewed worksheet for 2025/2026 APIT and resident-individual tax planning, aligned to the current IRD relief and band structure.

Looking for something more specific? Email info@wincore.lk with your requirements and we will tailor the template or checklist for your industry.